Climate and average weather in Zonguldak
In Zonguldak, the summers are humid, warm, fairly dry, and clear and the winters are cold, snowy, and partly cloudy.
Over the course of the year, the temperature in Zonguldak typically varies from 4°C to 25°C, and is rarely below -0°C or above 27°C. August is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Zonguldak for warm-weather activities is from late May to early October.
- Hottest
- Aug
- 25°
- Coldest
- Jan
- 5°
- Wettest
- Dec
- 107 mm
- Driest
- Jul
- 42 mm
- Rain / yr
- 861 mm
- 115 wet days
- Daylight
- 9.0–15.0 h
- shortest–longest
- Elevation
- 24 m
- 41.5°N
- Clearest
- Aug
- 19% cloud
Zonguldak is central district and city in Zonguldak Province, Turkey.
- Air quality
- Good
- PM10 26.8 µg/m³ · 2017
- Density
- 374/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Zonguldak weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late May to early October.
Temperature through the year
Daily average highs and lows in Zonguldak, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.7 months, from June 8 to September 27, with daily high temperatures above 21°C. The hottest month of the year in Zonguldak is August, with an average high of 25°C and low of 21°C.
The cool season lasts 3.8 months, from December 6 to March 31, with daily high temperatures below 11°C. The coldest month of the year in Zonguldak is January, with an average low of 5°C and high of 8°C.
Days typically run about 4°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 8 | 8 | 10 | 13 | 17 | 22 | 25 | 25 | 22 | 18 | 14 | 10 |
| Avg low (°C) | 5 | 4 | 6 | 9 | 14 | 18 | 21 | 21 | 19 | 15 | 10 | 7 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 8 | 5 |
| Feb | 8 | 4 |
| Mar | 10 | 6 |
| Apr | 13 | 9 |
| May | 17 | 14 |
| Jun | 22 | 18 |
| Jul | 25 | 21 |
| Aug | 25 | 21 |
| Sep | 22 | 19 |
| Oct | 18 | 15 |
| Nov | 14 | 10 |
| Dec | 10 | 7 |
Average hourly temperature in Zonguldak
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 25°C, and coldest before dawn in January, near 5°C.
Zonguldak weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 8° / 5° | 96 | 14 | 3.9 | 9.3 | 1.1 |
| Feb | 8° / 4° | 76 | 12.3 | 3.3 | 10.3 | 1.2 |
| Mar | 10° / 6° | 77 | 12.3 | 1.6 | 11.7 | 1.9 |
| Apr | 13° / 9° | 47 | 8.8 | 0.1 | 13.1 | 3.7 |
| May | 17° / 14° | 43 | 6.8 | 0 | 14.3 | 6.2 |
| Jun | 22° / 18° | 50 | 6.6 | 0 | 14.9 | 7.7 |
| Jul | 25° / 21° | 42 | 5.7 | 0 | 14.7 | 8.4 |
| Aug | 25° / 21° | 50 | 5.9 | 0 | 13.7 | 8.3 |
| Sep | 22° / 19° | 82 | 8.1 | 0 | 12.3 | 7.5 |
| Oct | 18° / 15° | 101 | 10.1 | 0 | 10.9 | 6.1 |
| Nov | 14° / 10° | 90 | 10.5 | 0.2 | 9.7 | 4.0 |
| Dec | 10° / 7° | 107 | 13.7 | 1.8 | 9.1 | 2.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Zonguldak gets about 861 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.
The wetter season lasts 5.9 months, from around Oct 16 to Apr 12, peaking in January at about 48% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 31.
December is the wettest month by volume, with 107 mm over about 14 wet days; July is the driest, with 42 mm. Some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 44 | 44 | 40 | 30 | 21 | 22 | 19 | 19 | 26 | 32 | 36 | 45 |
| Rain days | 14 | 12 | 12 | 9 | 7 | 7 | 6 | 6 | 8 | 10 | 11 | 14 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 44 | 14 |
| Feb | 44 | 12 |
| Mar | 40 | 12 |
| Apr | 30 | 9 |
| May | 21 | 7 |
| Jun | 22 | 7 |
| Jul | 19 | 6 |
| Aug | 19 | 6 |
| Sep | 26 | 8 |
| Oct | 32 | 10 |
| Nov | 36 | 11 |
| Dec | 45 | 14 |
Monthly rainfall
Over a full year, Zonguldak collects about 861 mm of rain across 115 wet days — roughly 72 mm in an average month.
It doesn’t fall evenly. December is the wettest month with 107 mm, while July is the driest at just 42 mm. The three wettest months alone bring about 35% of the year’s total, and some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 96 | 76 | 77 | 47 | 43 | 50 | 42 | 50 | 82 | 101 | 90 | 107 |
| Rain days | 14 | 12 | 12 | 9 | 7 | 7 | 6 | 6 | 8 | 10 | 11 | 14 |
| Snow days | 4 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Rainfall (mm) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 96 | 14 | 4 |
| Feb | 76 | 12 | 3 |
| Mar | 77 | 12 | 2 |
| Apr | 47 | 9 | 0 |
| May | 43 | 7 | 0 |
| Jun | 50 | 7 | 0 |
| Jul | 42 | 6 | 0 |
| Aug | 50 | 6 | 0 |
| Sep | 82 | 8 | 0 |
| Oct | 101 | 10 | 0 |
| Nov | 90 | 11 | 0 |
| Dec | 107 | 14 | 2 |
Snow in Zonguldak
Average snowy days through the year, the snow-season span, and estimated snowfall — for ski trips and the perennial 'will there be snow at Christmas?' question.
Zonguldak averages about 11 snowy days a year. Snow season runs roughly Nov 27 to Mar 31 — about 4.1 months.
January is snowiest, with roughly 4 days of snow and an estimated 17 cm of snowfall. Over the year that adds up to an estimated 58 cm of snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow days | 4 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Snowfall (cm) | 17 | 22 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 10 |
| Snow days | Snowfall (cm) | |
|---|---|---|
| Jan | 4 | 17 |
| Feb | 3 | 22 |
| Mar | 2 | 7 |
| Apr | 0 | 0 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 0 | 0 |
| Nov | 0 | 1 |
| Dec | 2 | 10 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Zonguldak, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around April 28 and lasts for 5.5 months, ending around October 12. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 91% of the time on average.
The cloudier part of the year begins around October 13 and lasts for 6.5 months, ending around April 27. The cloudiest month is December, when it is overcast or mostly cloudy 65% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 36 | 40 | 45 | 53 | 67 | 79 | 91 | 91 | 81 | 60 | 49 | 35 |
| Cloudier (%) | 64 | 60 | 55 | 47 | 33 | 21 | 9 | 9 | 19 | 40 | 51 | 65 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 36 | 64 |
| Feb | 40 | 60 |
| Mar | 45 | 55 |
| Apr | 53 | 47 |
| May | 67 | 33 |
| Jun | 79 | 21 |
| Jul | 91 | 9 |
| Aug | 91 | 9 |
| Sep | 81 | 19 |
| Oct | 60 | 40 |
| Nov | 49 | 51 |
| Dec | 35 | 65 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 13, brings about 15 hours of light; the shortest, around December 13, only 9 hours — a swing of roughly 6 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.3 | 10.3 | 11.7 | 13.1 | 14.3 | 14.9 | 14.7 | 13.7 | 12.3 | 10.9 | 9.7 | 9.1 |
| Sunrise (AM) | 7:23 | 6:57 | 6:13 | 5:20 | 4:39 | 4:24 | 4:37 | 5:07 | 5:39 | 6:12 | 6:49 | 7:18 |
| Sunset (PM) | 4:42 | 5:18 | 5:52 | 6:26 | 6:59 | 7:22 | 7:20 | 6:47 | 5:55 | 5:04 | 4:27 | 4:19 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.3 | 7:23 | 4:42 |
| Feb | 10.3 | 6:57 | 5:18 |
| Mar | 11.7 | 6:13 | 5:52 |
| Apr | 13.1 | 5:20 | 6:26 |
| May | 14.3 | 4:39 | 6:59 |
| Jun | 14.9 | 4:24 | 7:22 |
| Jul | 14.7 | 4:37 | 7:20 |
| Aug | 13.7 | 5:07 | 6:47 |
| Sep | 12.3 | 5:39 | 5:55 |
| Oct | 10.9 | 6:12 | 5:04 |
| Nov | 9.7 | 6:49 | 4:27 |
| Dec | 9.1 | 7:18 | 4:19 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Zonguldak averages about 15 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 6 and 26 days.
The sunnier stretch runs 5.3 months, from around May 2 to Oct 9. The sunniest month is August, with roughly 25 sunny days (brilliant).
The greyest month is January, down near 7 sunny days — about 72% fewer than the August peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 7 | 7 | 10 | 12 | 16 | 20 | 26 | 26 | 20 | 14 | 11 | 7 |
| Sky | Gloomy | Mixed | Mixed | Mixed | Bright | Bright | Brilliant | Brilliant | Bright | Mixed | Mixed | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 7 | Gloomy |
| Feb | 7 | Mixed |
| Mar | 10 | Mixed |
| Apr | 12 | Mixed |
| May | 16 | Bright |
| Jun | 20 | Bright |
| Jul | 26 | Brilliant |
| Aug | 26 | Brilliant |
| Sep | 20 | Bright |
| Oct | 14 | Mixed |
| Nov | 11 | Mixed |
| Dec | 7 | Gloomy |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Zonguldak, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 4.5 months, from around May 28 to October 10. The muggiest month is August, when the air feels humid, muggy or worse about 93% of the time.
The most comfortable stretch runs from around October 11 to May 27, and April is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 98 | 51 | 5 | 0 | 1 | 12 | 44 | 92 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 2 | 36 | 22 | 7 | 6 | 24 | 33 | 8 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 12 | 44 | 28 | 25 | 38 | 19 | 0 | 0 |
| Muggy (%) | 0 | 0 | 0 | 0 | 1 | 28 | 49 | 47 | 24 | 3 | 0 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 2 | 16 | 21 | 3 | 0 | 0 | 0 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 100 | 0 | 0 | 0 | 0 | 0 |
| Feb | 100 | 0 | 0 | 0 | 0 | 0 |
| Mar | 100 | 0 | 0 | 0 | 0 | 0 |
| Apr | 98 | 2 | 0 | 0 | 0 | 0 |
| May | 51 | 36 | 12 | 1 | 0 | 0 |
| Jun | 5 | 22 | 44 | 28 | 2 | 0 |
| Jul | 0 | 7 | 28 | 49 | 16 | 0 |
| Aug | 1 | 6 | 25 | 47 | 21 | 1 |
| Sep | 12 | 24 | 38 | 24 | 3 | 0 |
| Oct | 44 | 33 | 19 | 3 | 0 | 0 |
| Nov | 92 | 8 | 0 | 0 | 0 | 0 |
| Dec | 100 | 0 | 0 | 0 | 0 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Zonguldak is typically light breeze, near 13 km/h, and varies little with the seasons.
The windier part of the year lasts 5.7 months, from around Oct 13 to Apr 3. The windiest month is February, averaging about 15 km/h (light breeze).
The calmer part of the year runs from around Apr 4 to Aug 13, with May the calmest month at about 11 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 15 | 15 | 14 | 12 | 11 | 12 | 12 | 13 | 13 | 13 | 14 | 15 |
| Feels | light breeze | light breeze | light breeze | light breeze | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 15 | light breeze |
| Feb | 15 | light breeze |
| Mar | 14 | light breeze |
| Apr | 12 | light breeze |
| May | 11 | calm |
| Jun | 12 | calm |
| Jul | 12 | light breeze |
| Aug | 13 | light breeze |
| Sep | 13 | light breeze |
| Oct | 13 | light breeze |
| Nov | 14 | light breeze |
| Dec | 15 | light breeze |
Best time to visit Zonguldak
To characterize how pleasant the weather is in Zonguldak throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late September, Zonguldak is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Zonguldak for general outdoor tourist activities is from late May to early October, with a peak score in the first week of July.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 1.2 | 1.2 | 2.0 | 3.7 | 6.2 | 7.7 | 8.4 | 8.3 | 7.5 | 6.1 | 4.0 | 2.0 |
| Rating | poor | poor | poor | fair | good | ideal | ideal | ideal | ideal | good | fair | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 1.2 | poor |
| Feb | 1.2 | poor |
| Mar | 2.0 | poor |
| Apr | 3.7 | fair |
| May | 6.2 | good |
| Jun | 7.7 | ideal |
| Jul | 8.4 | ideal |
| Aug | 8.3 | ideal |
| Sep | 7.5 | ideal |
| Oct | 6.1 | good |
| Nov | 4.0 | fair |
| Dec | 2.0 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Zonguldak for hot-weather activities is from late June to early September, with a peak score in the first week of August.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Zonguldak, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around August (highs near 25°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 8°C), pack a warm layer, a heavy coat and rain gear.
In August, Zonguldak sees daytime highs around 25°C and nights near 21°C. Worth packing: light clothes and sun protection. About 6 days see rain.
Sea temperature near Zonguldak
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 16 km away) is warmest in August at about 25°C and coldest in February near 8°C.
It's comfortable for a long swim from Jun 12 to Oct 11 — about 4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 9 | 8 | 8 | 11 | 16 | 21 | 24 | 25 | 23 | 20 | 15 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 9 | Bracing |
| Feb | 8 | Bracing |
| Mar | 8 | Bracing |
| Apr | 11 | Bracing |
| May | 16 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Refreshing |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 20 | Cool |
| Nov | 15 | Cool |
| Dec | 12 | Bracing |
UV index (midday) in Zonguldak by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Zonguldak peaks around June 23 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 3 | 6 | 6 | 8 | 8 | 8 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 3 | Moderate |
| Apr | 6 | High |
| May | 6 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Average hourly UV index in Zonguldak
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in June the burn window is concentrated in the middle of the day: about 8 hours a day reach index 3 (protection recommended), and 4.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 0 | 0 | 2.5 | 6 | 7 | 8 | 8 | 7.5 | 6 | 3 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 2.5 | 4.5 | 5 | 4.5 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 2.5 | 0 |
| Apr | 6 | 0 |
| May | 7 | 2.5 |
| Jun | 8 | 4.5 |
| Jul | 8 | 5 |
| Aug | 7.5 | 4.5 |
| Sep | 6 | 0 |
| Oct | 3 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Air quality in Zonguldak by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.
Air quality in Zonguldak is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 9 | 10 | 15 | 14 | 13 | 11 | 9 | 9 | 9 | 10 | 10 | 8 |
| Level | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 10 | Good |
| Mar | 15 | Moderate |
| Apr | 14 | Moderate |
| May | 13 | Moderate |
| Jun | 11 | Good |
| Jul | 9 | Good |
| Aug | 9 | Good |
| Sep | 9 | Good |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 8 | Good |
Growing season
Zonguldak is mild enough that a frost-free day stays more likely than not even in midwinter.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 94 | 93 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 |
| Frost nights | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 94 | 6 |
| Feb | 93 | 2 |
| Mar | 99 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 99 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Zonguldak banks about 1,871 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 0 | 0 | 0 | 31 | 169 | 300 | 392 | 407 | 309 | 201 | 61 | 0 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 31 |
| May | 169 |
| Jun | 300 |
| Jul | 392 |
| Aug | 407 |
| Sep | 309 |
| Oct | 201 |
| Nov | 61 |
| Dec | 0 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Zonguldak receives about 4.2 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.5 and 6.8 kWh/m².
The brighter stretch of the year lasts 6.0 months, from around Mar 24 to Sep 22. The brightest month is June, averaging about 6.6 kWh/m² (intense).
The dimmest month is December, down near 1.5 kWh/m² — roughly 77% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 1.7 | 2.6 | 3.8 | 5.2 | 6.1 | 6.7 | 6.7 | 6.0 | 4.5 | 3.0 | 2.1 | 1.5 |
| Level | Dim | Moderate | Moderate | Bright | Intense | Intense | Intense | Bright | Bright | Moderate | Moderate | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 1.7 | Dim |
| Feb | 2.6 | Moderate |
| Mar | 3.8 | Moderate |
| Apr | 5.2 | Bright |
| May | 6.1 | Intense |
| Jun | 6.7 | Intense |
| Jul | 6.7 | Intense |
| Aug | 6.0 | Bright |
| Sep | 4.5 | Bright |
| Oct | 3.0 | Moderate |
| Nov | 2.1 | Moderate |
| Dec | 1.5 | Dim |
Where is Zonguldak?
Zonguldak sits at 41.5°N, 31.8°E, 24 m above sea level, in Turkey. The nearest listed city is Çaycuma, 24 km away.
Topography around Zonguldak
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Zonguldak.
Within 3 km, the terrain around Zonguldak has significant variations in elevation — a maximum elevation change of 423 m around an average of 97 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 923 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,992 m.
The land around Zonguldak is covered by trees (55%), water (24%) and artificial surfaces (20%) within 3 km, trees (49%) and water (44%) within 16 km, and trees (58%) and water (34%) within 80 km.
Turkey travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $18,599
- 2025
- Happiness
- 5.3 / 10
- World Happiness, 2025
- Homicide rate
- 3.2
- per 100k, 2023
- Road deaths
- 6.7
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 488
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Zonguldak (41.4514°, 31.7931°, elevation 24 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).