Olecko climate — normals and trends
Olecko (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.8 °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 (-4.3 °C). Rainfall peaks in July.
Olecko averages 119 frost days, 1 hot days (≥ 30 °C) and 138 rainy days per year.
Olecko has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 140 to 98 per year over the period.
The hottest day of the period reached 34.4 °C (on 31 July 1994) and the coldest -32.7 °C (on 12 January 1950).
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
OleckoWarmia-Masuria
- coords
- 54.03°, 22.51°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.8°C
Average daily high
10.1°C
Average daily low
3.4°C
Annual rainfall
674mm
Sunshine / day
7.0h
Mean relative humidity
81%
Average peak wind
18.5km/h
Seasonal range
21.9°C
Frost days (< 0 °C)
119 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
138 d/yr
Annual snowfall
86.6 cm
Average feels-like high
7.2 °C
Average feels-like low
0.1 °C
Average peak gust
36.6 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
+2.5 °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
34.4 °C
31 July 1994
Coldest day
-32.7 °C
12 January 1950
Wettest day
49 mm
30 August 1988
Windiest day
55.0 km/h
22 February 1953
Strongest gust
104.8 km/h
18 November 2004
Hottest feels-like
36.0 °C
17 July 2007
Coldest feels-like
-38.4 °C
12 January 1950
Snowiest day
15.8 cm
13 April 1996
Sunniest day
16.7 h
18 June 2021
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 | 3.2 °C | +5.4 °C | 43 mm | -3 mm |
| Feb | 0.6 °C | +1.7 °C | 17 mm | -23 mm |
| Mar | 9.7 °C | +6.2 °C | 41 mm | +1 mm |
| Apr | 14.8 °C | +4.2 °C | 17 mm | -31 mm |
| May | 14.6 °C | -2.0 °C | 58 mm | -4 mm |
| Jun | 20.3 °C | +0.3 °C | 59 mm | -15 mm |
| Jul | 22.8 °C | +1.1 °C | 122 mm | +37 mm |
| Aug | 21.4 °C | +0.1 °C | 65 mm | -8 mm |
| Sep | 19.1 °C | +2.5 °C | 71 mm | +14 mm |
| Oct | 10.6 °C | +0.2 °C | 85 mm | +35 mm |
| Nov | 4.6 °C | +0.6 °C | 61 mm | +11 mm |
| Dec | 3.3 °C | +3.2 °C | 26 mm | -24 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 Olecko?
Olecko has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.8 °C and it receives 674 mm of precipitation per year.
What is the hottest day ever recorded in Olecko?
The hottest day measured in Olecko between 1940 and 2025 was 31 July 1994, reaching 34.4 °C.
What is the coldest day in Olecko?
The coldest day measured in Olecko between 1940 and 2025 was 12 January 1950, at -32.7 °C.
Does it snow in Olecko?
Yes. Olecko gets on average 86.6 cm of snow per year and has around 119 frost days.
Has the climate of Olecko warmed?
Yes: Olecko warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Olecko?
The wettest day measured in Olecko between 1940 and 2025 was 30 August 1988, with 49 mm of rain in 24 hours.
What was the windiest day in Olecko?
The windiest day measured in Olecko between 1940 and 2025 was 22 February 1953, with winds reaching 55.0 km/h.
What is the warmest month in Olecko?
The warmest month in Olecko is July (17.6 °C on average); the coldest is January (-4.3 °C).
How much does it rain in Olecko?
Olecko receives on average 674 mm of precipitation per year, spread over about 138 rainy days.
Is it sunny in Olecko?
Olecko 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 Olecko?
The heaviest 24-hour snowfall measured in Olecko between 1940 and 2025 was 13 April 1996, with 15.8 cm.
Are there tropical nights in Olecko?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Olecko.
What was the most extreme apparent temperature in Olecko?
In Olecko, between 1940 and 2025, the highest apparent temperature reached 36.0 °C on 17 July 2007, and the lowest was -38.4 °C on 12 January 1950.
Compare Olecko with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Olecko