Uusikaupunki climate — normals and trends
Uusikaupunki (Finland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.5 °C and it receives 613 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 (16.6 °C on average) and the coldest is February (-4.6 °C). Rainfall peaks in August.
Uusikaupunki averages 124 frost days, 0 hot days (≥ 30 °C) and 125 rainy days per year.
Uusikaupunki 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 146 to 102 per year over the period.
The hottest day of the period reached 30.1 °C (on 4 August 2014) and the coldest -34.6 °C (on 10 January 1987).
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
UusikaupunkiSouthwest Finland
- coords
- 60.80°, 21.41°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.5°C
Average daily high
7.9°C
Average daily low
3.0°C
Annual rainfall
613mm
Sunshine / day
7.9h
Mean relative humidity
80%
Average peak wind
22.0km/h
Seasonal range
21.2°C
Frost days (< 0 °C)
124 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
95.4 cm
Average feels-like high
4.4 °C
Average feels-like low
-1.0 °C
Average peak gust
40.3 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 = 0.37 · 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
4 August 2014
Coldest day
-34.6 °C
10 January 1987
Wettest day
82 mm
6 August 1967
Windiest day
58.4 km/h
26 December 2011
Strongest gust
110.5 km/h
15 November 2001
Hottest feels-like
31.5 °C
22 July 2011
Coldest feels-like
-41.5 °C
10 January 1987
Snowiest day
17.7 cm
12 January 2021
Sunniest day
18.4 h
20 June 2023
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 | 1.7 °C | +3.5 °C | 58 mm | +13 mm |
| Feb | 0.3 °C | +2.8 °C | 15 mm | -18 mm |
| Mar | 4.9 °C | +4.3 °C | 9 mm | -24 mm |
| Apr | 8.1 °C | +2.3 °C | 60 mm | +23 mm |
| May | 10.6 °C | -1.0 °C | 37 mm | 0 mm |
| Jun | 15.3 °C | -0.8 °C | 60 mm | +13 mm |
| Jul | 22.3 °C | +2.9 °C | 81 mm | +16 mm |
| Aug | 18.1 °C | -0.6 °C | 74 mm | -4 mm |
| Sep | 16.9 °C | +2.8 °C | 90 mm | +25 mm |
| Oct | 10.2 °C | +1.8 °C | 62 mm | +3 mm |
| Nov | 6.3 °C | +2.6 °C | 53 mm | -7 mm |
| Dec | 5.2 °C | +4.5 °C | 63 mm | +9 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 Uusikaupunki?
Uusikaupunki has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.5 °C and it receives 613 mm of precipitation per year.
What is the hottest day ever recorded in Uusikaupunki?
The hottest day measured in Uusikaupunki between 1940 and 2025 was 4 August 2014, reaching 30.1 °C.
What is the coldest day in Uusikaupunki?
The coldest day measured in Uusikaupunki between 1940 and 2025 was 10 January 1987, at -34.6 °C.
Does it snow in Uusikaupunki?
Yes. Uusikaupunki gets on average 95.4 cm of snow per year and has around 124 frost days.
Has the climate of Uusikaupunki warmed?
Yes: Uusikaupunki warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Uusikaupunki?
The wettest day measured in Uusikaupunki between 1940 and 2025 was 6 August 1967, with 82 mm of rain in 24 hours.
What was the windiest day in Uusikaupunki?
The windiest day measured in Uusikaupunki between 1940 and 2025 was 26 December 2011, with winds reaching 58.4 km/h.
What is the warmest month in Uusikaupunki?
The warmest month in Uusikaupunki is July (16.6 °C on average); the coldest is February (-4.6 °C).
How much does it rain in Uusikaupunki?
Uusikaupunki receives on average 613 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Uusikaupunki?
Uusikaupunki 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 Uusikaupunki?
The heaviest 24-hour snowfall measured in Uusikaupunki between 1940 and 2025 was 12 January 2021, with 17.7 cm.
Are there tropical nights in Uusikaupunki?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Uusikaupunki.
What was the most extreme apparent temperature in Uusikaupunki?
In Uusikaupunki, between 1940 and 2025, the highest apparent temperature reached 31.5 °C on 22 July 2011, and the lowest was -41.5 °C on 10 January 1987.
Compare Uusikaupunki with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Uusikaupunki