Bydgoszcz climate — normals and trends
Bydgoszcz (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 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 (18.3 °C on average) and the coldest is January (-1.9 °C). Rainfall peaks in July.
Bydgoszcz averages 94 frost days, 3 hot days (≥ 30 °C) and 124 rainy days per year.
Bydgoszcz 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 113 to 75 per year over the period.
The hottest day of the period reached 36.6 °C (on 10 August 1992) and the coldest -30.4 °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
BydgoszczKujawsko-Pomorskie
- coords
- 53.12°, 18.01°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.3°C
Average daily high
11.8°C
Average daily low
4.8°C
Annual rainfall
596mm
Sunshine / day
7.0h
Mean relative humidity
79%
Average peak wind
18.2km/h
Seasonal range
20.2°C
Frost days (< 0 °C)
94 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
124 d/yr
Annual snowfall
48.9 cm
Average feels-like high
9.2 °C
Average feels-like low
1.7 °C
Average peak gust
37.1 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
10.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.43 · 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
36.6 °C
10 August 1992
Coldest day
-30.4 °C
12 February 1985
Wettest day
70 mm
24 July 2010
Windiest day
54.0 km/h
24 November 1984
Strongest gust
113.0 km/h
11 April 1997
Hottest feels-like
38.3 °C
11 July 1959
Coldest feels-like
-35.4 °C
12 February 1985
Snowiest day
18.3 cm
1 November 1941
Sunniest day
16.0 h
15 June 1940
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 | 4.2 °C | +3.9 °C | 54 mm | +16 mm |
| Feb | 2.7 °C | +1.0 °C | 14 mm | -21 mm |
| Mar | 11.2 °C | +5.2 °C | 24 mm | -14 mm |
| Apr | 16.2 °C | +4.0 °C | 16 mm | -25 mm |
| May | 16.0 °C | -1.5 °C | 54 mm | -5 mm |
| Jun | 22.2 °C | +1.2 °C | 57 mm | -8 mm |
| Jul | 22.9 °C | +0.3 °C | 177 mm | +94 mm |
| Aug | 22.6 °C | +0.2 °C | 68 mm | +3 mm |
| Sep | 19.9 °C | +1.9 °C | 42 mm | -6 mm |
| Oct | 12.0 °C | -0.3 °C | 67 mm | +26 mm |
| Nov | 6.2 °C | +0.3 °C | 39 mm | -4 mm |
| Dec | 4.1 °C | +2.0 °C | 12 mm | -30 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 Bydgoszcz?
Bydgoszcz has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.3 °C and it receives 596 mm of precipitation per year.
What is the hottest day ever recorded in Bydgoszcz?
The hottest day measured in Bydgoszcz between 1940 and 2025 was 10 August 1992, reaching 36.6 °C.
What is the coldest day in Bydgoszcz?
The coldest day measured in Bydgoszcz between 1940 and 2025 was 12 February 1985, at -30.4 °C.
Does it snow in Bydgoszcz?
Yes. Bydgoszcz gets on average 48.9 cm of snow per year and has around 94 frost days.
Has the climate of Bydgoszcz warmed?
Yes: Bydgoszcz warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bydgoszcz?
The wettest day measured in Bydgoszcz between 1940 and 2025 was 24 July 2010, with 70 mm of rain in 24 hours.
What was the windiest day in Bydgoszcz?
The windiest day measured in Bydgoszcz between 1940 and 2025 was 24 November 1984, with winds reaching 54.0 km/h.
What is the warmest month in Bydgoszcz?
The warmest month in Bydgoszcz is July (18.3 °C on average); the coldest is January (-1.9 °C).
How much does it rain in Bydgoszcz?
Bydgoszcz receives on average 596 mm of precipitation per year, spread over about 124 rainy days.
Is it sunny in Bydgoszcz?
Bydgoszcz gets on average 7.0 hours of sunshine per day, roughly 2,555 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bydgoszcz?
The heaviest 24-hour snowfall measured in Bydgoszcz between 1940 and 2025 was 1 November 1941, with 18.3 cm.
Are there tropical nights in Bydgoszcz?
Yes: Bydgoszcz has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bydgoszcz?
In Bydgoszcz, between 1940 and 2025, the highest apparent temperature reached 38.3 °C on 11 July 1959, and the lowest was -35.4 °C on 12 February 1985.
Compare Bydgoszcz with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bydgoszcz