Gierłoż climate — normals and trends
Gierłoż (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 671 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 (17.9 °C on average) and the coldest is January (-3.5 °C). Rainfall peaks in July.
Gierłoż averages 104 frost days, 2 hot days (≥ 30 °C) and 138 rainy days per year.
Gierłoż 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 82 per year over the period.
The hottest day of the period reached 34.5 °C (on 31 July 1994) and the coldest -31.2 °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
GierłożWarmia-Masuria
- coords
- 54.08°, 21.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.4°C
Average daily high
10.5°C
Average daily low
4.3°C
Annual rainfall
671mm
Sunshine / day
7.2h
Mean relative humidity
81%
Average peak wind
18.4km/h
Seasonal range
21.4°C
Frost days (< 0 °C)
104 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
138 d/yr
Annual snowfall
74.9 cm
Average feels-like high
7.7 °C
Average feels-like low
1.0 °C
Average peak gust
36.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.42 · 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
34.5 °C
31 July 1994
Coldest day
-31.2 °C
25 January 1942
Wettest day
42 mm
30 August 1988
Windiest day
52.5 km/h
22 February 1953
Strongest gust
107.3 km/h
18 November 2004
Hottest feels-like
35.6 °C
17 July 2007
Coldest feels-like
-36.7 °C
31 January 1956
Snowiest day
19.6 cm
30 January 1979
Sunniest day
16.6 h
21 June 2017
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 3.5 °C | +5.1 °C | 53 mm | +10 mm |
| Feb | 1.1 °C | +1.5 °C | 16 mm | -23 mm |
| Mar | 9.8 °C | +5.8 °C | 40 mm | 0 mm |
| Apr | 14.7 °C | +3.9 °C | 17 mm | -29 mm |
| May | 14.4 °C | -2.3 °C | 67 mm | +6 mm |
| Jun | 20.3 °C | +0.3 °C | 67 mm | -8 mm |
| Jul | 22.5 °C | +0.8 °C | 123 mm | +38 mm |
| Aug | 21.4 °C | 0.0 °C | 76 mm | +3 mm |
| Sep | 19.2 °C | +2.4 °C | 100 mm | +43 mm |
| Oct | 10.9 °C | +0.1 °C | 78 mm | +26 mm |
| Nov | 5.0 °C | +0.5 °C | 59 mm | +8 mm |
| Dec | 3.8 °C | +3.1 °C | 27 mm | -22 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 Gierłoż?
Gierłoż has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.4 °C and it receives 671 mm of precipitation per year.
What is the hottest day ever recorded in Gierłoż?
The hottest day measured in Gierłoż between 1940 and 2025 was 31 July 1994, reaching 34.5 °C.
What is the coldest day in Gierłoż?
The coldest day measured in Gierłoż between 1940 and 2025 was 25 January 1942, at -31.2 °C.
Does it snow in Gierłoż?
Yes. Gierłoż gets on average 74.9 cm of snow per year and has around 104 frost days.
Has the climate of Gierłoż warmed?
Yes: Gierłoż warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gierłoż?
The wettest day measured in Gierłoż between 1940 and 2025 was 30 August 1988, with 42 mm of rain in 24 hours.
What was the windiest day in Gierłoż?
The windiest day measured in Gierłoż between 1940 and 2025 was 22 February 1953, with winds reaching 52.5 km/h.
What is the warmest month in Gierłoż?
The warmest month in Gierłoż is July (17.9 °C on average); the coldest is January (-3.5 °C).
How much does it rain in Gierłoż?
Gierłoż receives on average 671 mm of precipitation per year, spread over about 138 rainy days.
Is it sunny in Gierłoż?
Gierłoż 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 Gierłoż?
The heaviest 24-hour snowfall measured in Gierłoż between 1940 and 2025 was 30 January 1979, with 19.6 cm.
Are there tropical nights in Gierłoż?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Gierłoż.
What was the most extreme apparent temperature in Gierłoż?
In Gierłoż, between 1940 and 2025, the highest apparent temperature reached 35.6 °C on 17 July 2007, and the lowest was -36.7 °C on 31 January 1956.
Compare Gierłoż with another city
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Nearby cities
The climate around Gierłoż