Leszno climate — normals and trends
Leszno (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.0 °C and it receives 614 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 (19.0 °C on average) and the coldest is January (-1.2 °C). Rainfall peaks in July.
Leszno averages 86 frost days, 7 hot days (≥ 30 °C) and 128 rainy days per year.
Leszno has warmed by +2.6 °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 103 to 69 per year over the period.
The hottest day of the period reached 38.9 °C (on 26 June 2019) and the coldest -31.0 °C (on 13 January 1987).
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
LesznoGreater Poland
- coords
- 51.84°, 16.57°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.0°C
Average daily high
12.8°C
Average daily low
5.4°C
Annual rainfall
614mm
Sunshine / day
7.4h
Mean relative humidity
77%
Average peak wind
18.8km/h
Seasonal range
20.2°C
Frost days (< 0 °C)
86 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
44.0 cm
Average feels-like high
10.0 °C
Average feels-like low
2.3 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.47 · 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
38.9 °C
26 June 2019
Coldest day
-31.0 °C
13 January 1987
Wettest day
66 mm
30 July 2013
Windiest day
56.2 km/h
28 March 1997
Strongest gust
123.5 km/h
18 January 2007
Hottest feels-like
38.1 °C
8 August 2015
Coldest feels-like
-36.1 °C
13 January 1987
Snowiest day
15.5 cm
18 March 1960
Sunniest day
16.0 h
5 July 1942
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 | 5.1 °C | +4.1 °C | 52 mm | +12 mm |
| Feb | 3.8 °C | +1.2 °C | 17 mm | -21 mm |
| Mar | 12.1 °C | +4.9 °C | 28 mm | -13 mm |
| Apr | 17.2 °C | +4.0 °C | 25 mm | -19 mm |
| May | 17.4 °C | -0.9 °C | 64 mm | +3 mm |
| Jun | 24.4 °C | +2.5 °C | 72 mm | +6 mm |
| Jul | 24.6 °C | +1.0 °C | 83 mm | +2 mm |
| Aug | 24.8 °C | +1.4 °C | 76 mm | +8 mm |
| Sep | 20.6 °C | +1.6 °C | 69 mm | +21 mm |
| Oct | 12.5 °C | -0.8 °C | 59 mm | +16 mm |
| Nov | 7.4 °C | +0.7 °C | 42 mm | -1 mm |
| Dec | 4.4 °C | +1.6 °C | 22 mm | -23 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 Leszno?
Leszno has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.0 °C and it receives 614 mm of precipitation per year.
What is the hottest day ever recorded in Leszno?
The hottest day measured in Leszno between 1940 and 2025 was 26 June 2019, reaching 38.9 °C.
What is the coldest day in Leszno?
The coldest day measured in Leszno between 1940 and 2025 was 13 January 1987, at -31.0 °C.
Does it snow in Leszno?
Yes. Leszno gets on average 44.0 cm of snow per year and has around 86 frost days.
Has the climate of Leszno warmed?
Yes: Leszno warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Leszno?
The wettest day measured in Leszno between 1940 and 2025 was 30 July 2013, with 66 mm of rain in 24 hours.
What was the windiest day in Leszno?
The windiest day measured in Leszno between 1940 and 2025 was 28 March 1997, with winds reaching 56.2 km/h.
What is the warmest month in Leszno?
The warmest month in Leszno is July (19.0 °C on average); the coldest is January (-1.2 °C).
How much does it rain in Leszno?
Leszno receives on average 614 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Leszno?
Leszno gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Leszno?
The heaviest 24-hour snowfall measured in Leszno between 1940 and 2025 was 18 March 1960, with 15.5 cm.
Are there tropical nights in Leszno?
Yes: Leszno has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Leszno?
In Leszno, between 1940 and 2025, the highest apparent temperature reached 38.1 °C on 8 August 2015, and the lowest was -36.1 °C on 13 January 1987.
Compare Leszno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Leszno