Climate and average weather in Mladá Boleslav
In Mladá Boleslav, the summers are warm, showery, and partly cloudy and the winters are very cold, snowy, and mostly cloudy.
Over the course of the year, the temperature in Mladá Boleslav typically varies from -3°C to 24°C, and is rarely below -11°C or above 31°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Mladá Boleslav for warm-weather activities is from mid May to late September.
- Hottest
- Jul
- 24°
- Coldest
- Jan
- -3°
- Wettest
- Jul
- 78 mm
- Driest
- Apr
- 38 mm
- Rain / yr
- 660 mm
- 127 wet days
- Daylight
- 7.8–16.2 h
- shortest–longest
- Elevation
- 241 m
- 50.4°N
- Clearest
- Aug
- 57% cloud
Mladá Boleslav is town in Central Bohemian Region, Czech Republic.
- Air quality
- Elevated
- PM2.5 15.6 µg/m³ · 2019
- Density
- 1,511/km²
- people per km²
- Founded
- 1130
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Mladá Boleslav 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 mid May to late September.
Temperature through the year
Daily average highs and lows in Mladá Boleslav, 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 May 24 to September 12, with daily high temperatures above 19°C. The hottest month of the year in Mladá Boleslav is July, with an average high of 24°C and low of 14°C.
The cool season lasts 3.6 months, from November 16 to March 5, with daily high temperatures below 6°C. The coldest month of the year in Mladá Boleslav is January, with an average low of -3°C and high of 2°C.
Days typically run about 8°C warmer than nights, with the widest day–night swing (around 10°C) in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 3 | 8 | 14 | 18 | 22 | 24 | 24 | 19 | 13 | 6 | 2 |
| Avg low (°C) | -3 | -2 | 0 | 4 | 9 | 12 | 14 | 14 | 10 | 6 | 2 | -2 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 2 | -3 |
| Feb | 3 | -2 |
| Mar | 8 | 0 |
| Apr | 14 | 4 |
| May | 18 | 9 |
| Jun | 22 | 12 |
| Jul | 24 | 14 |
| Aug | 24 | 14 |
| Sep | 19 | 10 |
| Oct | 13 | 6 |
| Nov | 6 | 2 |
| Dec | 2 | -2 |
How hot and cold Mladá Boleslav really feels
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 -8°C (around January 27), with roughly 153 freezing days a year (feels-like at or below 0°C), worst in January.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 2 | 3 | 8 | 13 | 18 | 22 | 24 | 24 | 19 | 12 | 6 | 2 |
| Air high (°C) | 2 | 3 | 8 | 14 | 18 | 22 | 24 | 24 | 19 | 13 | 6 | 2 |
| Feels-like low (°C) | -7 | -7 | -3 | 2 | 7 | 12 | 14 | 14 | 9 | 3 | -2 | -6 |
| Air low (°C) | -3 | -2 | 0 | 4 | 9 | 12 | 14 | 14 | 10 | 6 | 2 | -2 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 2 | 2 | -7 | -3 |
| Feb | 3 | 3 | -7 | -2 |
| Mar | 8 | 8 | -3 | 0 |
| Apr | 13 | 14 | 2 | 4 |
| May | 18 | 18 | 7 | 9 |
| Jun | 22 | 22 | 12 | 12 |
| Jul | 24 | 24 | 14 | 14 |
| Aug | 24 | 24 | 14 | 14 |
| Sep | 19 | 19 | 9 | 10 |
| Oct | 12 | 13 | 3 | 6 |
| Nov | 6 | 6 | -2 | 2 |
| Dec | 2 | 2 | -6 | -2 |
Average hourly temperature in Mladá Boleslav
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 July afternoons, near 24°C, and coldest before dawn in January, near -3°C.
Mladá Boleslav 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 | 2° / -3° | 52 | 11.5 | 6.9 | 8.3 | 0.0 |
| Feb | 3° / -2° | 42 | 9.4 | 5.4 | 9.7 | 0.0 |
| Mar | 8° / 0° | 52 | 11.1 | 3.6 | 11.5 | 1.2 |
| Apr | 14° / 4° | 38 | 9 | 0.8 | 13.5 | 3.9 |
| May | 18° / 9° | 58 | 11.6 | 0.1 | 15.2 | 5.7 |
| Jun | 22° / 12° | 67 | 11.5 | 0 | 16.1 | 6.2 |
| Jul | 24° / 14° | 78 | 12.6 | 0 | 15.8 | 6.5 |
| Aug | 24° / 14° | 66 | 10.4 | 0 | 14.3 | 6.8 |
| Sep | 19° / 10° | 58 | 9 | 0 | 12.4 | 6.0 |
| Oct | 13° / 6° | 50 | 9.8 | 0.2 | 10.5 | 3.3 |
| Nov | 6° / 2° | 48 | 9.9 | 2.4 | 8.8 | 0.7 |
| Dec | 2° / -2° | 52 | 11.1 | 5.6 | 7.9 | 0.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Mladá Boleslav gets about 660 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 3.3 months, from around May 1 to Aug 8, peaking in July at about 43% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 17.
July is the wettest month by volume, with 78 mm over about 13 wet days; April is the driest, with 38 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 (%) | 36 | 34 | 36 | 31 | 37 | 39 | 40 | 34 | 31 | 31 | 33 | 36 |
| Rain days | 12 | 9 | 11 | 9 | 12 | 12 | 13 | 10 | 9 | 10 | 10 | 11 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 36 | 12 |
| Feb | 34 | 9 |
| Mar | 36 | 11 |
| Apr | 31 | 9 |
| May | 37 | 12 |
| Jun | 39 | 12 |
| Jul | 40 | 13 |
| Aug | 34 | 10 |
| Sep | 31 | 9 |
| Oct | 31 | 10 |
| Nov | 33 | 10 |
| Dec | 36 | 11 |
Monthly rainfall
Over a full year, Mladá Boleslav collects about 660 mm of rain across 127 wet days — roughly 55 mm in an average month.
It doesn’t fall evenly. July is the wettest month with 78 mm, while April is the driest at just 38 mm. The three wettest months alone bring about 32% 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) | 52 | 42 | 52 | 38 | 58 | 67 | 78 | 66 | 58 | 50 | 48 | 52 |
| Rain days | 12 | 9 | 11 | 9 | 12 | 12 | 13 | 10 | 9 | 10 | 10 | 11 |
| Snow days | 7 | 5 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 6 |
| Rainfall (mm) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 52 | 12 | 7 |
| Feb | 42 | 9 | 5 |
| Mar | 52 | 11 | 4 |
| Apr | 38 | 9 | 1 |
| May | 58 | 12 | 0 |
| Jun | 67 | 12 | 0 |
| Jul | 78 | 13 | 0 |
| Aug | 66 | 10 | 0 |
| Sep | 58 | 9 | 0 |
| Oct | 50 | 10 | 0 |
| Nov | 48 | 10 | 2 |
| Dec | 52 | 11 | 6 |
Snow in Mladá Boleslav
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.
Mladá Boleslav averages about 25 snowy days a year. Snow season runs roughly Oct 26 to Apr 21 — about 5.9 months.
January is snowiest, with roughly 7 days of snow and an estimated 23 cm of snowfall. Over the year that adds up to an estimated 93 cm of snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow days | 7 | 5 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 6 |
| Snowfall (cm) | 23 | 22 | 13 | 3 | 0 | 0 | 0 | 0 | 0 | 2 | 9 | 21 |
| Snow days | Snowfall (cm) | |
|---|---|---|
| Jan | 7 | 23 |
| Feb | 5 | 22 |
| Mar | 4 | 13 |
| Apr | 1 | 3 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 0 | 2 |
| Nov | 2 | 9 |
| Dec | 6 | 21 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Mladá Boleslav, 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 March 24 and lasts for 6.2 months, ending around September 28. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 50% of the time on average.
The cloudier part of the year begins around September 29 and lasts for 5.8 months, ending around March 23. The cloudiest month is December, when it is overcast or mostly cloudy 78% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 26 | 29 | 34 | 43 | 40 | 42 | 48 | 50 | 40 | 32 | 22 | 22 |
| Cloudier (%) | 74 | 71 | 66 | 57 | 60 | 58 | 52 | 50 | 60 | 68 | 78 | 78 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 26 | 74 |
| Feb | 29 | 71 |
| Mar | 34 | 66 |
| Apr | 43 | 57 |
| May | 40 | 60 |
| Jun | 42 | 58 |
| Jul | 48 | 52 |
| Aug | 50 | 50 |
| Sep | 40 | 60 |
| Oct | 32 | 68 |
| Nov | 22 | 78 |
| Dec | 22 | 78 |
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 14, brings about 16 h 12 min of light; the shortest, around December 13, only 7 h 48 min — a swing of roughly 8 h 24 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 8.3 | 9.7 | 11.5 | 13.5 | 15.2 | 16.1 | 15.8 | 14.3 | 12.4 | 10.5 | 8.8 | 7.9 |
| Sunrise (AM) | 8:02 | 7:24 | 6:24 | 5:15 | 4:20 | 3:55 | 4:12 | 4:55 | 5:43 | 6:32 | 7:25 | 8:02 |
| Sunset (PM) | 4:17 | 5:06 | 5:56 | 6:46 | 7:33 | 8:06 | 8:00 | 7:14 | 6:06 | 4:59 | 4:07 | 3:51 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 8.3 | 8:02 | 4:17 |
| Feb | 9.7 | 7:24 | 5:06 |
| Mar | 11.5 | 6:24 | 5:56 |
| Apr | 13.5 | 5:15 | 6:46 |
| May | 15.2 | 4:20 | 7:33 |
| Jun | 16.1 | 3:55 | 8:06 |
| Jul | 15.8 | 4:12 | 8:00 |
| Aug | 14.3 | 4:55 | 7:14 |
| Sep | 12.4 | 5:43 | 6:06 |
| Oct | 10.5 | 6:32 | 4:59 |
| Nov | 8.8 | 7:25 | 4:07 |
| Dec | 7.9 | 8:02 | 3:51 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Mladá Boleslav averages about 6 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 3 and 9 days.
The sunnier stretch runs 4.0 months, from around Jun 22 to Oct 20. The sunniest month is August, with roughly 8 sunny days (mixed).
The greyest month is November, down near 3 sunny days — about 62% fewer than the August peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 5 | 5 | 6 | 7 | 7 | 7 | 8 | 9 | 7 | 6 | 3 | 4 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Mixed | Gloomy | Gloomy | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 5 | Gloomy |
| Feb | 5 | Gloomy |
| Mar | 6 | Gloomy |
| Apr | 7 | Gloomy |
| May | 7 | Gloomy |
| Jun | 7 | Gloomy |
| Jul | 8 | Gloomy |
| Aug | 9 | Mixed |
| Sep | 7 | Gloomy |
| Oct | 6 | Gloomy |
| Nov | 3 | Gloomy |
| Dec | 4 | 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 Mladá Boleslav, the air stays dry or comfortable essentially all year. Even in August, the muggiest month, it feels humid or worse only about 10% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 94 | 73 | 57 | 61 | 87 | 99 | 100 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 6 | 22 | 33 | 29 | 11 | 1 | 0 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 5 | 10 | 10 | 1 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 100 | 0 | 0 |
| Mar | 100 | 0 | 0 |
| Apr | 100 | 0 | 0 |
| May | 94 | 6 | 0 |
| Jun | 73 | 22 | 5 |
| Jul | 57 | 33 | 10 |
| Aug | 61 | 29 | 10 |
| Sep | 87 | 11 | 1 |
| Oct | 99 | 1 | 0 |
| Nov | 100 | 0 | 0 |
| Dec | 100 | 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.
Wind in Mladá Boleslav is steady company: average speeds sit near 11 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 11 | 11 | 10 | 10 | 9 | 10 | 11 | 11 | 11 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 12 | calm |
| Feb | 12 | calm |
| Mar | 12 | calm |
| Apr | 11 | calm |
| May | 11 | calm |
| Jun | 10 | calm |
| Jul | 10 | calm |
| Aug | 9 | calm |
| Sep | 10 | calm |
| Oct | 11 | calm |
| Nov | 11 | calm |
| Dec | 11 | calm |
Best time to visit Mladá Boleslav
To characterize how pleasant the weather is in Mladá Boleslav throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late May, Mladá Boleslav 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 Mladá Boleslav for general outdoor tourist activities is from mid May to late September, with a peak score in the third week of August.
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) | 0.0 | 0.0 | 1.2 | 3.9 | 5.7 | 6.2 | 6.5 | 6.8 | 5.9 | 3.4 | 0.7 | 0.0 |
| Rating | poor | poor | poor | fair | good | good | good | good | good | poor | poor | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 0.0 | poor |
| Feb | 0.0 | poor |
| Mar | 1.2 | poor |
| Apr | 3.9 | fair |
| May | 5.7 | good |
| Jun | 6.2 | good |
| Jul | 6.5 | good |
| Aug | 6.8 | good |
| Sep | 5.9 | good |
| Oct | 3.4 | poor |
| Nov | 0.7 | poor |
| Dec | 0.0 | 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 Mladá Boleslav for hot-weather activities is from early July to late August, 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 Mladá Boleslav, 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 July (highs near 24°C), the essentials are light clothes, rain gear and sun protection. In the cold season around January (highs near 2°C), pack a warm layer, a heavy coat and rain gear.
In July, Mladá Boleslav sees daytime highs around 24°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.
UV index (midday) in Mladá Boleslav 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 Mladá Boleslav peaks around June 21 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. 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 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 4 | 6 | 7 | 7 | 6 | 5 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 7 | High |
| Aug | 6 | High |
| Sep | 5 | Moderate |
| Oct | 2 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Average hourly UV index in Mladá Boleslav
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 3.5 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 | 3 | 4.5 | 7 | 8 | 7.5 | 6.5 | 4.5 | 0 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 0 | 3.5 | 3 | 0.5 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 3 | 0 |
| Apr | 4.5 | 0 |
| May | 7 | 0 |
| Jun | 8 | 3.5 |
| Jul | 7.5 | 3 |
| Aug | 6.5 | 0.5 |
| Sep | 4.5 | 0 |
| Oct | 0 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Air quality in Mladá Boleslav 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 Mladá Boleslav is worst in March — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Seasonal pattern from CAMS reanalysis, scaled to Mladá Boleslav's WHO annual average of 15.6 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 14 | 15 | 19 | 18 | 17 | 18 | 16 | 17 | 15 | 13 | 12 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 15 | Moderate |
| Mar | 19 | Moderate |
| Apr | 18 | Moderate |
| May | 17 | Moderate |
| Jun | 18 | Moderate |
| Jul | 16 | Moderate |
| Aug | 17 | Moderate |
| Sep | 15 | Moderate |
| Oct | 13 | Moderate |
| Nov | 12 | Moderate |
| Dec | 12 | Moderate |
Growing season
The growing season in Mladá Boleslav typically lasts about 260 days, from around March 12 to November 26 — the span where a frost-free day is more likely than not. It is reliably frost-free from April 20 to October 19.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 26 | 29 | 55 | 87 | 99 | 100 | 100 | 100 | 100 | 92 | 67 | 34 |
| Frost nights | 31 | 28 | 31 | 20 | 0 | 0 | 0 | 0 | 0 | 15 | 30 | 31 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 26 | 31 |
| Feb | 29 | 28 |
| Mar | 55 | 31 |
| Apr | 87 | 20 |
| May | 99 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 92 | 15 |
| Nov | 67 | 30 |
| Dec | 34 | 31 |
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. Mladá Boleslav banks about 1,002 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 0 | 0 | 0 | 10 | 109 | 203 | 274 | 271 | 126 | 10 | 0 | 0 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 10 |
| May | 109 |
| Jun | 203 |
| Jul | 274 |
| Aug | 271 |
| Sep | 126 |
| Oct | 10 |
| Nov | 0 |
| 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.
Mladá Boleslav receives about 3.1 kWh/m² a day of solar energy on average — moderate — with a clear seasonal swing between 0.7 and 5.4 kWh/m².
The brighter stretch of the year lasts 5.9 months, from around Mar 22 to Sep 17. The brightest month is June, averaging about 5.4 kWh/m² (bright).
The dimmest month is December, down near 0.7 kWh/m² — roughly 87% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 0.9 | 1.7 | 2.8 | 4.4 | 5.2 | 5.4 | 5.3 | 4.6 | 3.1 | 1.9 | 1.0 | 0.7 |
| Level | Dim | Dim | Moderate | Bright | Bright | Bright | Bright | Bright | Moderate | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 0.9 | Dim |
| Feb | 1.7 | Dim |
| Mar | 2.8 | Moderate |
| Apr | 4.4 | Bright |
| May | 5.2 | Bright |
| Jun | 5.4 | Bright |
| Jul | 5.3 | Bright |
| Aug | 4.6 | Bright |
| Sep | 3.1 | Moderate |
| Oct | 1.9 | Dim |
| Nov | 1.0 | Dim |
| Dec | 0.7 | Dim |
Where is Mladá Boleslav?
Mladá Boleslav sits at 50.4°N, 14.9°E, 241 m above sea level, in Czechia. The nearest listed city is Brandýs nad Labem-Stará Boleslav, 30 km away.
Topography around Mladá Boleslav
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mladá Boleslav.
Within 3 km, the terrain around Mladá Boleslav has only modest variations in elevation — a maximum elevation change of 171 m around an average of 238 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 222 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,573 m.
The land around Mladá Boleslav is covered by artificial surfaces (31%), cropland (29%) and trees (25%) within 3 km, cropland (53%) and trees (32%) within 16 km, and trees (42%) and cropland (37%) within 80 km.
Czechia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 59% of US
- price level, 2025
- GDP per capita
- $35,917
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 0.8
- per 100k, 2023
- Road deaths
- 5.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 582
- 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 Mladá Boleslav (50.4113°, 14.9032°, elevation 241 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. 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).