Bartoszyce climate — normals and trends
Bartoszyce (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.4 °C and it receives 674 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 (17.6 °C on average) and the coldest is January (-3.1 °C). Rainfall peaks in July.
Bartoszyce averages 106 frost days, 1 hot days (≥ 30 °C) and 138 rainy days per year.
Bartoszyce 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 126 to 86 per year over the period.
The hottest day of the period reached 34.6 °C (on 10 August 1992) and the coldest -35.6 °C (on 25 January 1942).
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
BartoszyceWarmia-Masuria
- coords
- 54.25°, 20.81°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.4°C
Average daily high
10.7°C
Average daily low
4.0°C
Annual rainfall
674mm
Sunshine / day
7.3h
Mean relative humidity
81%
Average peak wind
18.2km/h
Seasonal range
20.7°C
Frost days (< 0 °C)
106 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
138 d/yr
Annual snowfall
70.9 cm
Average feels-like high
7.9 °C
Average feels-like low
0.8 °C
Average peak gust
36.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.41 · 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
34.6 °C
10 August 1992
Coldest day
-35.6 °C
25 January 1942
Wettest day
49 mm
28 July 1988
Windiest day
53.5 km/h
17 January 1955
Strongest gust
106.2 km/h
18 November 2004
Hottest feels-like
36.0 °C
30 July 1994
Coldest feels-like
-40.7 °C
25 January 1942
Snowiest day
16.2 cm
30 January 1979
Sunniest day
16.6 h
23 June 2019
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 | 3.9 °C | +5.0 °C | 69 mm | +25 mm |
| Feb | 1.2 °C | +1.1 °C | 16 mm | -23 mm |
| Mar | 10.0 °C | +5.5 °C | 25 mm | -16 mm |
| Apr | 14.4 °C | +3.4 °C | 26 mm | -21 mm |
| May | 14.3 °C | -2.2 °C | 67 mm | +5 mm |
| Jun | 19.9 °C | +0.1 °C | 89 mm | +16 mm |
| Jul | 22.4 °C | +0.7 °C | 131 mm | +44 mm |
| Aug | 21.3 °C | -0.2 °C | 76 mm | +2 mm |
| Sep | 19.3 °C | +2.2 °C | 97 mm | +39 mm |
| Oct | 11.2 °C | 0.0 °C | 88 mm | +37 mm |
| Nov | 5.1 °C | +0.2 °C | 52 mm | +2 mm |
| Dec | 4.2 °C | +3.0 °C | 27 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 Bartoszyce?
Bartoszyce has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.4 °C and it receives 674 mm of precipitation per year.
What is the hottest day ever recorded in Bartoszyce?
The hottest day measured in Bartoszyce between 1940 and 2025 was 10 August 1992, reaching 34.6 °C.
What is the coldest day in Bartoszyce?
The coldest day measured in Bartoszyce between 1940 and 2025 was 25 January 1942, at -35.6 °C.
Does it snow in Bartoszyce?
Yes. Bartoszyce gets on average 70.9 cm of snow per year and has around 106 frost days.
Has the climate of Bartoszyce warmed?
Yes: Bartoszyce warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bartoszyce?
The wettest day measured in Bartoszyce between 1940 and 2025 was 28 July 1988, with 49 mm of rain in 24 hours.
What was the windiest day in Bartoszyce?
The windiest day measured in Bartoszyce between 1940 and 2025 was 17 January 1955, with winds reaching 53.5 km/h.
What is the warmest month in Bartoszyce?
The warmest month in Bartoszyce is July (17.6 °C on average); the coldest is January (-3.1 °C).
How much does it rain in Bartoszyce?
Bartoszyce receives on average 674 mm of precipitation per year, spread over about 138 rainy days.
Is it sunny in Bartoszyce?
Bartoszyce gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bartoszyce?
The heaviest 24-hour snowfall measured in Bartoszyce between 1940 and 2025 was 30 January 1979, with 16.2 cm.
Are there tropical nights in Bartoszyce?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bartoszyce.
What was the most extreme apparent temperature in Bartoszyce?
In Bartoszyce, between 1940 and 2025, the highest apparent temperature reached 36.0 °C on 30 July 1994, and the lowest was -40.7 °C on 25 January 1942.
Compare Bartoszyce with another city
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Nearby cities
The climate around Bartoszyce