Lapua climate — normals and trends
Lapua (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 3.8 °C and it receives 593 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 January (-7.7 °C). Rainfall peaks in August.
Lapua averages 170 frost days, 1 hot days (≥ 30 °C) and 125 rainy days per year.
Lapua has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 182 to 158 per year over the period.
The hottest day of the period reached 33.2 °C (on 29 July 2010) and the coldest -37.5 °C (on 7 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
LapuaSouth Ostrobothnia
- coords
- 62.97°, 23.01°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.8°C
Average daily high
7.4°C
Average daily low
0.1°C
Annual rainfall
593mm
Sunshine / day
7.1h
Mean relative humidity
80%
Average peak wind
15.6km/h
Seasonal range
24.3°C
Frost days (< 0 °C)
170 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
111.2 cm
Average feels-like high
4.1 °C
Average feels-like low
-3.4 °C
Average peak gust
34.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.26 · 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
33.2 °C
29 July 2010
Coldest day
-37.5 °C
7 January 1987
Wettest day
87 mm
6 August 1967
Windiest day
38.9 km/h
15 December 1975
Strongest gust
100.4 km/h
14 January 1984
Hottest feels-like
34.1 °C
29 July 2010
Coldest feels-like
-42.8 °C
7 January 1987
Snowiest day
13.9 cm
8 April 1982
Sunniest day
19.0 h
16 June 1940
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 | -2.1 °C | +3.0 °C | 44 mm | +12 mm |
| Feb | -0.7 °C | +3.8 °C | 11 mm | -15 mm |
| Mar | 5.1 °C | +4.6 °C | 26 mm | -3 mm |
| Apr | 9.6 °C | +2.5 °C | 28 mm | -9 mm |
| May | 12.6 °C | -1.4 °C | 48 mm | +1 mm |
| Jun | 17.4 °C | -1.3 °C | 81 mm | +17 mm |
| Jul | 24.9 °C | +4.0 °C | 77 mm | -1 mm |
| Aug | 18.8 °C | -0.1 °C | 83 mm | +4 mm |
| Sep | 16.8 °C | +3.5 °C | 69 mm | +9 mm |
| Oct | 8.5 °C | +1.9 °C | 54 mm | +2 mm |
| Nov | 3.2 °C | +2.4 °C | 55 mm | +8 mm |
| Dec | 1.9 °C | +4.7 °C | 72 mm | +31 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 Lapua?
Lapua has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 3.8 °C and it receives 593 mm of precipitation per year.
What is the hottest day ever recorded in Lapua?
The hottest day measured in Lapua between 1940 and 2025 was 29 July 2010, reaching 33.2 °C.
What is the coldest day in Lapua?
The coldest day measured in Lapua between 1940 and 2025 was 7 January 1987, at -37.5 °C.
Does it snow in Lapua?
Yes. Lapua gets on average 111.2 cm of snow per year and has around 170 frost days.
Has the climate of Lapua warmed?
Yes: Lapua warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lapua?
The wettest day measured in Lapua between 1940 and 2025 was 6 August 1967, with 87 mm of rain in 24 hours.
What was the windiest day in Lapua?
The windiest day measured in Lapua between 1940 and 2025 was 15 December 1975, with winds reaching 38.9 km/h.
What is the warmest month in Lapua?
The warmest month in Lapua is July (16.6 °C on average); the coldest is January (-7.7 °C).
How much does it rain in Lapua?
Lapua receives on average 593 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Lapua?
Lapua gets on average 7.1 hours of sunshine per day, roughly 2,592 hours per year over 1940-2025.
What is the biggest single-day snowfall in Lapua?
The heaviest 24-hour snowfall measured in Lapua between 1940 and 2025 was 8 April 1982, with 13.9 cm.
Are there tropical nights in Lapua?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Lapua.
What was the most extreme apparent temperature in Lapua?
In Lapua, between 1940 and 2025, the highest apparent temperature reached 34.1 °C on 29 July 2010, and the lowest was -42.8 °C on 7 January 1987.
Compare Lapua with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Lapua