Climate and average weather in Karamürsel

In Karamürsel, the summers are humid, hot, fairly dry, and clear and the winters are cool, snowy, and partly cloudy.

Best: late April to late October

Over the course of the year, the temperature in Karamürsel typically varies from 3°C to 29°C, and is rarely below -2°C or above 33°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 Karamürsel for warm-weather activities is from late April to late October.

Hottest
Aug
29°
Coldest
Jan
Wettest
Dec
87 mm
Driest
Aug
27 mm
Rain / yr
678 mm
102 wet days
Daylight
9.1–14.9 h
shortest–longest
Elevation
17 m
40.7°N
Clearest
Jul
22% cloud

Karamürsel is district of Kocaeli, northwestern Turkey.

Density
117/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Karamürsel 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 April to late October.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Karamürsel, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.6 months, from June 4 to September 22, with daily high temperatures above 24°C. The hottest month of the year in Karamürsel is August, with an average high of 29°C and low of 20°C.

The cool season lasts 3.7 months, from November 29 to March 20, with daily high temperatures below 13°C. The coldest month of the year in Karamürsel is January, with an average low of 3°C and high of 8°C.

Days typically run about 8°C warmer than nights, with the widest day–night swing (around 10°C) in June.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan83
Feb103
Mar125
Apr178
May2212
Jun2617
Jul2919
Aug2920
Sep2616
Oct2013
Nov158
Dec104

How hot and cold Karamürsel really feels

Feels-like highFeels-like lowactual air temp

The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.

On the coldest nights, wind chill pulls the feels-like down to about -1°C (around January 25), with roughly 33 freezing days a year (feels-like at or below 0°C), worst in January.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan8803
Feb101003
Mar121225
Apr171768
May22221212
Jun26261717
Jul30291919
Aug30292020
Sep26261616
Oct20201313
Nov151568
Dec101024

Average hourly temperature in Karamürsel

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 29°C, and coldest before dawn in January, near C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Karamürsel weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8011.84.59.41.4
Feb10° / 6610.93.710.42.0
Mar12° / 7611.3211.73.2
Apr17° / 5490.213.15.6
May22° / 12°447.4014.27.3
Jun26° / 17°477.1014.97.5
Jul29° / 19°294.4014.66.8
Aug29° / 20°274.1013.66.7
Sep26° / 16°456.5012.37.8
Oct20° / 13°628.9010.96.7
Nov15° / 628.80.49.74.7
Dec10° / 8711.62.69.12.1

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Karamürsel gets about 678 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.

The wetter season lasts 5.3 months, from around Nov 13 to Apr 21, peaking in January at about 40% 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 87 mm over about 12 wet days; August is the driest, with 27 mm. Some of the cold-season precipitation falls as snow.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetJan 1 · 40%Jul 31 · 13%
Rain on a day (%)Rain days
Jan3712
Feb3811
Mar3711
Apr309
May247
Jun237
Jul154
Aug144
Sep217
Oct289
Nov309
Dec3812

Monthly rainfall

Over a full year, Karamürsel collects about 678 mm of rain across 102 wet days — roughly 56 mm in an average month.

It doesn’t fall evenly. December is the wettest month with 87 mm, while August is the driest at just 27 mm. The three wettest months alone bring about 36% of the year’s total, and some of the cold-season precipitation falls as snow.

0255075100JanFebMarAprMayJunJulAugSepOctNovDec806676544447292745626287
Rainfall (mm)Rain daysSnow days
Jan80125
Feb66114
Mar76112
Apr5490
May4470
Jun4770
Jul2940
Aug2740
Sep4570
Oct6290
Nov6290
Dec87123

Snow in Karamürsel

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.

Karamürsel averages about 13 snowy days a year. Snow season runs roughly Nov 17 to Apr 3 — about 4.5 months.

January is snowiest, with roughly 4 days of snow and an estimated 19 cm of snowfall. Over the year that adds up to an estimated 76 cm of snow.

02468JanFebMarAprMayJunJulAugSepOctNovDecsnow seasonsnow seasonJan 30
Snow daysSnowfall (cm)
Jan519
Feb422
Mar215
Apr01
May00
Jun00
Jul00
Aug00
Sep00
Oct00
Nov02
Dec318

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Karamürsel, 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 May 4 and lasts for 5.3 months, ending around October 10. The clearest month is August, 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 11 and lasts for 6.7 months, ending around May 3. The cloudiest month is December, when it is overcast or mostly cloudy 65% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecJul 29 · 94%Dec 29 · 32%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan3664
Feb3664
Mar4357
Apr5050
May6436
Jun7822
Jul9010
Aug919
Sep7921
Oct5743
Nov4654
Dec3565

Daylight, sunrise and sunset

DaylightNight

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 11, brings about 14 h 54 min of light; the shortest, around January 1, only 9 h 06 min — a swing of roughly 5 h 48 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan9.47:294:52
Feb10.47:055:28
Mar11.76:216:01
Apr13.15:296:34
May14.24:507:06
Jun14.94:357:29
Jul14.64:487:27
Aug13.65:176:55
Sep12.35:486:04
Oct10.96:205:13
Nov9.76:564:38
Dec9.17:254:31

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Karamürsel averages about 14 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 6 and 25 days.

The sunnier stretch runs 5.1 months, from around May 2 to Oct 4. The sunniest month is July, with roughly 24 sunny days (brilliant).

The greyest month is December, down near 7 sunny days — about 71% fewer than the July peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 3025 daysDec 286 days
Sunny daysSky
Jan7Gloomy
Feb6Gloomy
Mar8Mixed
Apr11Mixed
May15Mixed
Jun19Bright
Jul25Brilliant
Aug24Brilliant
Sep18Bright
Oct12Mixed
Nov10Mixed
Dec7Gloomy

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

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 Karamürsel, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.1 months, from around June 1 to October 2. The muggiest month is August, when the air feels humid, muggy or worse about 84% of the time.

The most comfortable stretch runs from around October 3 to May 31, and April is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecApr 1 · 100%Aug 4 · 10%oppressivemuggyhumidcomfortabledrycomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan1000000
Feb1000000
Mar1000000
Apr973000
May5835700
Jun133638130
Jul21840355
Aug31438396
Sep20363590
Oct56331010
Nov964000
Dec1000000

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.

Wind in Karamürsel is steady company: average speeds sit near 9 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeAug 12 · 11 km/hMay 23 · 8 km/h
Wind speed (km/h)Feels
Jan9calm
Feb10calm
Mar9calm
Apr9calm
May8calm
Jun9calm
Jul10calm
Aug11calm
Sep10calm
Oct9calm
Nov9calm
Dec9calm

Best time to visit Karamürsel

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Karamürsel throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around early May, Karamürsel is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

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 Karamürsel for general outdoor tourist activities is from late April to late October, with a peak score in the second week of September.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationSep 12 · 7.9

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).

Travel score (0–10)Rating
Jan1.4poor
Feb2.0poor
Mar3.2poor
Apr5.6good
May7.3good
Jun7.5ideal
Jul6.8good
Aug6.7good
Sep7.7ideal
Oct6.7good
Nov4.6fair
Dec2.2poor

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 Karamürsel for hot-weather activities is from mid June to late September, with a peak score in the last week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 25 · 8.6

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 Karamürsel, by month

EssentialRecommendedOptional

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 29°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 8°C), pack a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Karamürsel sees daytime highs around 29°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

Sea temperature near Karamürsel

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 42 km away) is warmest in August at about 24°C and coldest in February near 8°C.

It's comfortable for a long swim from Jun 12 to Oct 6 — about 3.8 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar9Bracing
Apr11Bracing
May16Cool
Jun21Refreshing
Jul23Refreshing
Aug24Warm
Sep22Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index (midday) in Karamürsel by month

LowModerateHighVery highExtreme

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 Karamürsel peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJun 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec2Low

Average hourly UV index in Karamürsel

LowModerateHighVery highExtreme

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 8.5 hours a day reach index 3 (protection recommended), and 5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan00
Feb00
Mar3.50
Apr73
May7.53.5
Jun8.55
Jul85
Aug7.54.5
Sep6.52.5
Oct3.50
Nov00
Dec00

Air quality in Karamürsel by month

GoodModeratePoorUnhealthyVery unhealthy

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 Karamürsel is worst in March — around 18 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2317 µg/m³Dec 1810 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar18Moderate
Apr17Moderate
May17Moderate
Jun13Moderate
Jul11Good
Aug11Good
Sep10Good
Oct11Good
Nov12Good
Dec10Good
Almanac & agriculture

Growing season

Chance of a frost-free dayReliably frost-free (≥90%)

Karamürsel is mild enough that a frost-free day stays more likely than not even in midwinter. Nights are reliably above freezing from about March 8 to December 14 (282 days); outside that window a hard frost is an occasional risk.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecreliably frost-freeMar 890%Dec 1490%
Frost-free chance (%)Frost nights
Jan7731
Feb7928
Mar924
Apr990
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov990
Dec8919

Growing degree days

Degree days (base 10°C)Frost-free shaded

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. Karamürsel banks about 2,097 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.

05001,0001,5002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan0
Feb0
Mar0
Apr72
May219
Jun344
Jul437
Aug449
Sep328
Oct202
Nov46
Dec0

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.

Karamürsel receives about 4.1 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.5 and 6.9 kWh/m².

The brighter stretch of the year lasts 5.9 months, from around Mar 27 to Sep 22. The brightest month is June, averaging about 6.7 kWh/m² (intense).

The dimmest month is December, down near 1.5 kWh/m² — roughly 77% less than the June peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseJun 306.9 kWhDec 181.5 kWh
Solar energy (kWh/m²)Level
Jan1.8Dim
Feb2.5Moderate
Mar3.7Moderate
Apr5.1Bright
May6.1Intense
Jun6.7Intense
Jul6.8Intense
Aug6.0Bright
Sep4.5Bright
Oct3.0Moderate
Nov2.1Moderate
Dec1.5Dim

Where is Karamürsel?

Karamürsel sits at 40.7°N, 29.6°E, 17 m above sea level, in Turkey. The nearest listed city is Körfez, 16 km away.

Topography around Karamürsel

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Karamürsel.

Within 3 km, the terrain around Karamürsel has significant variations in elevation — a maximum elevation change of 478 m around an average of 111 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,136 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,536 m.

The land around Karamürsel is covered by water (45%) and trees (41%) within 3 km, trees (50%) and water (27%) within 16 km, and trees (48%) and water (26%) within 80 km.

3 km
478 m
16 km
1,136 m
80 km
2,536 m
treesgrasslandcroplandartificial surfacesbare terrainwater
Nearby: Körfez 16 km · Gölcük 17 km · Derince 18 km · Gebze 20 km · İzmit 28 km · Yalova 29 km · İznik 31 km · Orhangazi 34 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
Muslim 100%other 0%

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 Karamürsel (40.6913°, 29.6165°, elevation 17 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).