Mladá Boleslav climate — normals and trends
Mladá Boleslav (Czechia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.4 °C and it receives 665 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (18.2 °C on average) and the coldest is January (-1.9 °C). Rainfall peaks in July.
Mladá Boleslav averages 98 frost days, 5 hot days (≥ 30 °C) and 134 rainy days per year.
Mladá Boleslav has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 118 to 78 per year over the period.
The hottest day of the period reached 37.9 °C (on 20 August 2012) and the coldest -28.4 °C (on 1 February 1956).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Mladá BoleslavCentral Bohemia
- coords
- 50.41°, 14.90°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.4°C
Average daily high
12.2°C
Average daily low
4.8°C
Annual rainfall
665mm
Sunshine / day
7.7h
Mean relative humidity
77%
Average peak wind
15.7km/h
Seasonal range
20.1°C
Frost days (< 0 °C)
98 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
134 d/yr
Annual snowfall
65.5 cm
Average feels-like high
9.7 °C
Average feels-like low
2.0 °C
Average peak gust
33.6 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.51 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
37.9 °C
20 August 2012
Coldest day
-28.4 °C
1 February 1956
Wettest day
59 mm
18 August 2015
Windiest day
45.6 km/h
17 February 1962
Strongest gust
116.6 km/h
18 January 2007
Hottest feels-like
39.2 °C
22 August 1943
Coldest feels-like
-34.1 °C
1 February 1956
Snowiest day
13.9 cm
3 February 2019
Sunniest day
16.0 h
28 June 1995
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 3.4 °C | +3.0 °C | 57 mm | +8 mm |
| Feb | 3.3 °C | +0.9 °C | 12 mm | -32 mm |
| Mar | 11.3 °C | +4.2 °C | 27 mm | -21 mm |
| Apr | 16.3 °C | +3.6 °C | 37 mm | -10 mm |
| May | 17.8 °C | +0.2 °C | 46 mm | -16 mm |
| Jun | 24.7 °C | +3.6 °C | 57 mm | -11 mm |
| Jul | 24.3 °C | +1.4 °C | 79 mm | +4 mm |
| Aug | 25.1 °C | +2.2 °C | 65 mm | -2 mm |
| Sep | 20.0 °C | +1.6 °C | 80 mm | +27 mm |
| Oct | 11.8 °C | -0.7 °C | 57 mm | +10 mm |
| Nov | 6.3 °C | +0.4 °C | 48 mm | -4 mm |
| Dec | 3.8 °C | +1.8 °C | 28 mm | -26 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Mladá Boleslav?
Mladá Boleslav has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.4 °C and it receives 665 mm of precipitation per year.
What is the hottest day ever recorded in Mladá Boleslav?
The hottest day measured in Mladá Boleslav between 1940 and 2025 was 20 August 2012, reaching 37.9 °C.
What is the coldest day in Mladá Boleslav?
The coldest day measured in Mladá Boleslav between 1940 and 2025 was 1 February 1956, at -28.4 °C.
Does it snow in Mladá Boleslav?
Yes. Mladá Boleslav gets on average 65.5 cm of snow per year and has around 98 frost days.
Has the climate of Mladá Boleslav warmed?
Yes: Mladá Boleslav warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mladá Boleslav?
The wettest day measured in Mladá Boleslav between 1940 and 2025 was 18 August 2015, with 59 mm of rain in 24 hours.
What was the windiest day in Mladá Boleslav?
The windiest day measured in Mladá Boleslav between 1940 and 2025 was 17 February 1962, with winds reaching 45.6 km/h.
What is the warmest month in Mladá Boleslav?
The warmest month in Mladá Boleslav is July (18.2 °C on average); the coldest is January (-1.9 °C).
How much does it rain in Mladá Boleslav?
Mladá Boleslav receives on average 665 mm of precipitation per year, spread over about 134 rainy days.
Is it sunny in Mladá Boleslav?
Mladá Boleslav gets on average 7.7 hours of sunshine per day, roughly 2,811 hours per year over 1940-2025.
What is the biggest single-day snowfall in Mladá Boleslav?
The heaviest 24-hour snowfall measured in Mladá Boleslav between 1940 and 2025 was 3 February 2019, with 13.9 cm.
Are there tropical nights in Mladá Boleslav?
Yes: Mladá Boleslav has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mladá Boleslav?
In Mladá Boleslav, between 1940 and 2025, the highest apparent temperature reached 39.2 °C on 22 August 1943, and the lowest was -34.1 °C on 1 February 1956.
Compare Mladá Boleslav with another city
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Nearby cities
The climate around Mladá Boleslav