Säkylä climate — normals and trends
Säkylä (Finland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.9 °C and it receives 657 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 (16.9 °C on average) and the coldest is February (-6.0 °C). Rainfall peaks in August.
Säkylä averages 151 frost days, 1 hot days (≥ 30 °C) and 128 rainy days per year.
Säkylä 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 169 to 133 per year over the period.
The hottest day of the period reached 32.7 °C (on 17 July 2018) and the coldest -37.0 °C (on 3 February 1966).
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
SäkyläSatakunta
- coords
- 61.03°, 22.33°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.9°C
Average daily high
8.4°C
Average daily low
1.4°C
Annual rainfall
657mm
Sunshine / day
7.6h
Mean relative humidity
81%
Average peak wind
15.7km/h
Seasonal range
22.9°C
Frost days (< 0 °C)
151 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
109.2 cm
Average feels-like high
5.3 °C
Average feels-like low
-2.0 °C
Average peak gust
35.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.35 · 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
32.7 °C
17 July 2018
Coldest day
-37.0 °C
3 February 1966
Wettest day
74 mm
6 August 1967
Windiest day
44.5 km/h
26 December 2011
Strongest gust
100.4 km/h
26 December 2011
Hottest feels-like
33.4 °C
22 July 2011
Coldest feels-like
-42.5 °C
10 January 1987
Snowiest day
19.8 cm
18 December 1966
Sunniest day
18.6 h
24 June 2010
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 | 1.0 °C | +4.4 °C | 55 mm | +12 mm |
| Feb | 0.2 °C | +3.3 °C | 15 mm | -19 mm |
| Mar | 6.2 °C | +4.8 °C | 16 mm | -18 mm |
| Apr | 9.9 °C | +2.1 °C | 49 mm | +8 mm |
| May | 12.9 °C | -1.5 °C | 44 mm | -2 mm |
| Jun | 17.6 °C | -1.3 °C | 73 mm | +11 mm |
| Jul | 24.6 °C | +3.5 °C | 98 mm | +11 mm |
| Aug | 18.7 °C | -0.9 °C | 96 mm | +7 mm |
| Sep | 17.4 °C | +3.1 °C | 81 mm | +17 mm |
| Oct | 9.5 °C | +1.4 °C | 55 mm | +1 mm |
| Nov | 5.4 °C | +3.0 °C | 47 mm | -6 mm |
| Dec | 4.1 °C | +5.1 °C | 57 mm | +7 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 Säkylä?
Säkylä has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.9 °C and it receives 657 mm of precipitation per year.
What is the hottest day ever recorded in Säkylä?
The hottest day measured in Säkylä between 1940 and 2025 was 17 July 2018, reaching 32.7 °C.
What is the coldest day in Säkylä?
The coldest day measured in Säkylä between 1940 and 2025 was 3 February 1966, at -37.0 °C.
Does it snow in Säkylä?
Yes. Säkylä gets on average 109.2 cm of snow per year and has around 151 frost days.
Has the climate of Säkylä warmed?
Yes: Säkylä warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Säkylä?
The wettest day measured in Säkylä between 1940 and 2025 was 6 August 1967, with 74 mm of rain in 24 hours.
What was the windiest day in Säkylä?
The windiest day measured in Säkylä between 1940 and 2025 was 26 December 2011, with winds reaching 44.5 km/h.
What is the warmest month in Säkylä?
The warmest month in Säkylä is July (16.9 °C on average); the coldest is February (-6.0 °C).
How much does it rain in Säkylä?
Säkylä receives on average 657 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Säkylä?
Säkylä gets on average 7.6 hours of sunshine per day, roughly 2,774 hours per year over 1940-2025.
What is the biggest single-day snowfall in Säkylä?
The heaviest 24-hour snowfall measured in Säkylä between 1940 and 2025 was 18 December 1966, with 19.8 cm.
Are there tropical nights in Säkylä?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Säkylä.
What was the most extreme apparent temperature in Säkylä?
In Säkylä, between 1940 and 2025, the highest apparent temperature reached 33.4 °C on 22 July 2011, and the lowest was -42.5 °C on 10 January 1987.
Compare Säkylä with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Säkylä