Chojnów climate — normals and trends
Chojnów (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.9 °C and it receives 635 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 (18.6 °C on average) and the coldest is January (-1.2 °C). Rainfall peaks in July.
Chojnów averages 88 frost days, 6 hot days (≥ 30 °C) and 133 rainy days per year.
Chojnów has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 106 to 70 per year over the period.
The hottest day of the period reached 36.9 °C (on 8 August 2015) and the coldest -29.2 °C (on 14 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
ChojnówLower Silesia
- coords
- 51.27°, 15.94°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.9°C
Average daily high
12.6°C
Average daily low
5.1°C
Annual rainfall
635mm
Sunshine / day
7.6h
Mean relative humidity
77%
Average peak wind
17.5km/h
Seasonal range
19.8°C
Frost days (< 0 °C)
88 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
55.7 cm
Average feels-like high
10.1 °C
Average feels-like low
2.1 °C
Average peak gust
35.1 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
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.48 · 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
36.9 °C
8 August 2015
Coldest day
-29.2 °C
14 January 1987
Wettest day
60 mm
25 June 2013
Windiest day
52.1 km/h
17 February 2022
Strongest gust
127.4 km/h
18 January 2007
Hottest feels-like
38.2 °C
20 August 1943
Coldest feels-like
-34.6 °C
14 January 1987
Snowiest day
14.6 cm
26 November 1969
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 | 5.3 °C | +4.1 °C | 49 mm | +7 mm |
| Feb | 4.4 °C | +1.6 °C | 13 mm | -28 mm |
| Mar | 12.1 °C | +4.8 °C | 33 mm | -13 mm |
| Apr | 16.6 °C | +3.6 °C | 34 mm | -13 mm |
| May | 17.3 °C | -0.7 °C | 71 mm | +9 mm |
| Jun | 24.4 °C | +3.0 °C | 53 mm | -12 mm |
| Jul | 24.2 °C | +1.0 °C | 92 mm | +11 mm |
| Aug | 24.5 °C | +1.4 °C | 73 mm | +7 mm |
| Sep | 20.2 °C | +1.4 °C | 74 mm | +24 mm |
| Oct | 12.5 °C | -0.8 °C | 57 mm | +12 mm |
| Nov | 7.8 °C | +1.0 °C | 51 mm | +5 mm |
| Dec | 4.7 °C | +1.9 °C | 23 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 Chojnów?
Chojnów has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.9 °C and it receives 635 mm of precipitation per year.
What is the hottest day ever recorded in Chojnów?
The hottest day measured in Chojnów between 1940 and 2025 was 8 August 2015, reaching 36.9 °C.
What is the coldest day in Chojnów?
The coldest day measured in Chojnów between 1940 and 2025 was 14 January 1987, at -29.2 °C.
Does it snow in Chojnów?
Yes. Chojnów gets on average 55.7 cm of snow per year and has around 88 frost days.
Has the climate of Chojnów warmed?
Yes: Chojnów warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chojnów?
The wettest day measured in Chojnów between 1940 and 2025 was 25 June 2013, with 60 mm of rain in 24 hours.
What was the windiest day in Chojnów?
The windiest day measured in Chojnów between 1940 and 2025 was 17 February 2022, with winds reaching 52.1 km/h.
What is the warmest month in Chojnów?
The warmest month in Chojnów is July (18.6 °C on average); the coldest is January (-1.2 °C).
How much does it rain in Chojnów?
Chojnów receives on average 635 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Chojnów?
Chojnów gets on average 7.6 hours of sunshine per day, roughly 2,774 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chojnów?
The heaviest 24-hour snowfall measured in Chojnów between 1940 and 2025 was 26 November 1969, with 14.6 cm.
Are there tropical nights in Chojnów?
Yes: Chojnów has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chojnów?
In Chojnów, between 1940 and 2025, the highest apparent temperature reached 38.2 °C on 20 August 1943, and the lowest was -34.6 °C on 14 January 1987.
Compare Chojnów with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chojnów