Opoczno climate — normals and trends
Opoczno (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.3 °C and it receives 623 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 (18.7 °C on average) and the coldest is January (-2.6 °C). Rainfall peaks in July.
Opoczno averages 102 frost days, 5 hot days (≥ 30 °C) and 129 rainy days per year.
Opoczno has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 121 to 83 per year over the period.
The hottest day of the period reached 37.2 °C (on 22 August 1943) and the coldest -29.8 °C (on 11 January 1940).
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
OpocznoŁódź Voivodeship
- coords
- 51.38°, 20.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.3°C
Average daily high
12.1°C
Average daily low
4.5°C
Annual rainfall
623mm
Sunshine / day
7.2h
Mean relative humidity
78%
Average peak wind
19.0km/h
Seasonal range
21.3°C
Frost days (< 0 °C)
102 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
60.6 cm
Average feels-like high
9.3 °C
Average feels-like low
1.3 °C
Average peak gust
36.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.45 · 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
37.2 °C
22 August 1943
Coldest day
-29.8 °C
11 January 1940
Wettest day
50 mm
29 July 2000
Windiest day
56.2 km/h
20 January 1986
Strongest gust
114.5 km/h
20 January 1986
Hottest feels-like
36.8 °C
30 June 2022
Coldest feels-like
-35.2 °C
11 January 1940
Snowiest day
16.2 cm
30 January 1979
Sunniest day
15.7 h
2 July 2025
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 | 4.8 °C | +5.1 °C | 41 mm | +3 mm |
| Feb | 2.9 °C | +1.5 °C | 16 mm | -21 mm |
| Mar | 12.0 °C | +5.9 °C | 31 mm | -7 mm |
| Apr | 16.7 °C | +3.9 °C | 18 mm | -29 mm |
| May | 16.4 °C | -1.8 °C | 71 mm | +7 mm |
| Jun | 23.6 °C | +1.9 °C | 50 mm | -22 mm |
| Jul | 24.6 °C | +1.2 °C | 121 mm | +39 mm |
| Aug | 25.0 °C | +1.8 °C | 29 mm | -39 mm |
| Sep | 20.5 °C | +2.0 °C | 59 mm | +8 mm |
| Oct | 12.0 °C | -0.7 °C | 63 mm | +22 mm |
| Nov | 6.8 °C | +0.8 °C | 55 mm | +11 mm |
| Dec | 3.9 °C | +2.1 °C | 19 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 Opoczno?
Opoczno has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.3 °C and it receives 623 mm of precipitation per year.
What is the hottest day ever recorded in Opoczno?
The hottest day measured in Opoczno between 1940 and 2025 was 22 August 1943, reaching 37.2 °C.
What is the coldest day in Opoczno?
The coldest day measured in Opoczno between 1940 and 2025 was 11 January 1940, at -29.8 °C.
Does it snow in Opoczno?
Yes. Opoczno gets on average 60.6 cm of snow per year and has around 102 frost days.
Has the climate of Opoczno warmed?
Yes: Opoczno warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Opoczno?
The wettest day measured in Opoczno between 1940 and 2025 was 29 July 2000, with 50 mm of rain in 24 hours.
What was the windiest day in Opoczno?
The windiest day measured in Opoczno between 1940 and 2025 was 20 January 1986, with winds reaching 56.2 km/h.
What is the warmest month in Opoczno?
The warmest month in Opoczno is July (18.7 °C on average); the coldest is January (-2.6 °C).
How much does it rain in Opoczno?
Opoczno receives on average 623 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Opoczno?
Opoczno gets on average 7.2 hours of sunshine per day, roughly 2,628 hours per year over 1940-2025.
What is the biggest single-day snowfall in Opoczno?
The heaviest 24-hour snowfall measured in Opoczno between 1940 and 2025 was 30 January 1979, with 16.2 cm.
Are there tropical nights in Opoczno?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Opoczno.
What was the most extreme apparent temperature in Opoczno?
In Opoczno, between 1940 and 2025, the highest apparent temperature reached 36.8 °C on 30 June 2022, and the lowest was -35.2 °C on 11 January 1940.
Compare Opoczno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Opoczno