Świnoujście climate — normals and trends
Świnoujście (Poland) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.9 °C and it receives 646 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 August (18.0 °C on average) and the coldest is January (0.7 °C). Rainfall peaks in July.
Świnoujście averages 47 frost days, 0 hot days (≥ 30 °C) and 137 rainy days per year.
Świnoujście has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The number of frost days there went from about 67 to 27 per year over the period.
The hottest day of the period reached 30.1 °C (on 30 June 2019) and the coldest -16.2 °C (on 1 February 1956).
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
ŚwinoujścieWest Pomerania
- coords
- 53.91°, 14.25°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.9°C
Average daily high
10.4°C
Average daily low
7.4°C
Annual rainfall
646mm
Sunshine / day
7.9h
Mean relative humidity
80%
Average peak wind
29.8km/h
Seasonal range
17.3°C
Frost days (< 0 °C)
47 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
137 d/yr
Annual snowfall
44.7 cm
Average feels-like high
6.9 °C
Average feels-like low
2.7 °C
Average peak gust
43.5 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
10.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.50 · 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
30.1 °C
30 June 2019
Coldest day
-16.2 °C
1 February 1956
Wettest day
64 mm
28 June 1991
Windiest day
73.7 km/h
17 January 1955
Strongest gust
120.6 km/h
28 October 2002
Hottest feels-like
31.0 °C
12 July 2010
Coldest feels-like
-26.2 °C
31 December 1978
Snowiest day
13.0 cm
6 January 1982
Sunniest day
16.0 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 | 4.2 °C | +2.2 °C | 77 mm | +27 mm |
| Feb | 3.2 °C | +1.0 °C | 27 mm | -13 mm |
| Mar | 7.3 °C | +2.8 °C | 10 mm | -31 mm |
| Apr | 11.5 °C | +3.4 °C | 9 mm | -31 mm |
| May | 13.8 °C | +1.1 °C | 44 mm | -1 mm |
| Jun | 19.3 °C | +2.3 °C | 45 mm | -10 mm |
| Jul | 20.6 °C | +1.1 °C | 133 mm | +63 mm |
| Aug | 20.8 °C | +1.0 °C | 46 mm | -23 mm |
| Sep | 18.6 °C | +1.9 °C | 87 mm | +19 mm |
| Oct | 12.5 °C | +0.5 °C | 98 mm | +40 mm |
| Nov | 7.9 °C | +1.0 °C | 55 mm | -2 mm |
| Dec | 5.5 °C | +1.8 °C | 21 mm | -33 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 Świnoujście?
Świnoujście has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.9 °C and it receives 646 mm of precipitation per year.
What is the hottest day ever recorded in Świnoujście?
The hottest day measured in Świnoujście between 1940 and 2025 was 30 June 2019, reaching 30.1 °C.
What is the coldest day in Świnoujście?
The coldest day measured in Świnoujście between 1940 and 2025 was 1 February 1956, at -16.2 °C.
Does it snow in Świnoujście?
Yes. Świnoujście gets on average 44.7 cm of snow per year and has around 47 frost days.
Has the climate of Świnoujście warmed?
Yes: Świnoujście warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Świnoujście?
The wettest day measured in Świnoujście between 1940 and 2025 was 28 June 1991, with 64 mm of rain in 24 hours.
What was the windiest day in Świnoujście?
The windiest day measured in Świnoujście between 1940 and 2025 was 17 January 1955, with winds reaching 73.7 km/h.
What is the warmest month in Świnoujście?
The warmest month in Świnoujście is August (18.0 °C on average); the coldest is January (0.7 °C).
How much does it rain in Świnoujście?
Świnoujście receives on average 646 mm of precipitation per year, spread over about 137 rainy days.
Is it sunny in Świnoujście?
Świnoujście gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Świnoujście?
The heaviest 24-hour snowfall measured in Świnoujście between 1940 and 2025 was 6 January 1982, with 13.0 cm.
Are there tropical nights in Świnoujście?
Yes: Świnoujście has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Świnoujście?
In Świnoujście, between 1940 and 2025, the highest apparent temperature reached 31.0 °C on 12 July 2010, and the lowest was -26.2 °C on 31 December 1978.
Compare Świnoujście with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Świnoujście