Gniezno climate — normals and trends
Gniezno (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.5 °C and it receives 596 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 (18.5 °C on average) and the coldest is January (-1.7 °C). Rainfall peaks in July.
Gniezno averages 93 frost days, 4 hot days (≥ 30 °C) and 125 rainy days per year.
Gniezno 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 111 to 75 per year over the period.
The hottest day of the period reached 37.8 °C (on 10 August 1992) and the coldest -28.1 °C (on 12 February 1985).
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
GnieznoGreater Poland
- coords
- 52.53°, 17.58°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.5°C
Average daily high
12.0°C
Average daily low
4.9°C
Annual rainfall
596mm
Sunshine / day
7.4h
Mean relative humidity
78%
Average peak wind
19.2km/h
Seasonal range
20.2°C
Frost days (< 0 °C)
93 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
47.7 cm
Average feels-like high
9.2 °C
Average feels-like low
1.7 °C
Average peak gust
36.3 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.44 · 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
37.8 °C
10 August 1992
Coldest day
-28.1 °C
12 February 1985
Wettest day
61 mm
10 July 1980
Windiest day
57.3 km/h
24 November 1984
Strongest gust
117.4 km/h
13 November 1972
Hottest feels-like
37.9 °C
11 July 1959
Coldest feels-like
-33.6 °C
9 February 1956
Snowiest day
13.3 cm
4 April 1970
Sunniest day
16.0 h
7 June 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 | 4.4 °C | +4.0 °C | 54 mm | +16 mm |
| Feb | 2.9 °C | +1.1 °C | 17 mm | -19 mm |
| Mar | 11.5 °C | +5.2 °C | 24 mm | -15 mm |
| Apr | 16.6 °C | +4.1 °C | 22 mm | -18 mm |
| May | 16.3 °C | -1.3 °C | 63 mm | +6 mm |
| Jun | 22.9 °C | +1.8 °C | 53 mm | -9 mm |
| Jul | 23.6 °C | +0.7 °C | 110 mm | +28 mm |
| Aug | 23.5 °C | +0.7 °C | 79 mm | +14 mm |
| Sep | 20.2 °C | +1.9 °C | 52 mm | +4 mm |
| Oct | 12.0 °C | -0.5 °C | 70 mm | +29 mm |
| Nov | 6.5 °C | +0.4 °C | 43 mm | +0 mm |
| Dec | 3.9 °C | +1.7 °C | 15 mm | -29 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 Gniezno?
Gniezno has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.5 °C and it receives 596 mm of precipitation per year.
What is the hottest day ever recorded in Gniezno?
The hottest day measured in Gniezno between 1940 and 2025 was 10 August 1992, reaching 37.8 °C.
What is the coldest day in Gniezno?
The coldest day measured in Gniezno between 1940 and 2025 was 12 February 1985, at -28.1 °C.
Does it snow in Gniezno?
Yes. Gniezno gets on average 47.7 cm of snow per year and has around 93 frost days.
Has the climate of Gniezno warmed?
Yes: Gniezno warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gniezno?
The wettest day measured in Gniezno between 1940 and 2025 was 10 July 1980, with 61 mm of rain in 24 hours.
What was the windiest day in Gniezno?
The windiest day measured in Gniezno between 1940 and 2025 was 24 November 1984, with winds reaching 57.3 km/h.
What is the warmest month in Gniezno?
The warmest month in Gniezno is July (18.5 °C on average); the coldest is January (-1.7 °C).
How much does it rain in Gniezno?
Gniezno receives on average 596 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Gniezno?
Gniezno 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 Gniezno?
The heaviest 24-hour snowfall measured in Gniezno between 1940 and 2025 was 4 April 1970, with 13.3 cm.
Are there tropical nights in Gniezno?
Yes: Gniezno has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gniezno?
In Gniezno, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 11 July 1959, and the lowest was -33.6 °C on 9 February 1956.
Compare Gniezno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gniezno