Larsmo climate — normals and trends
Larsmo (Finland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 3.7 °C and it receives 567 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 (15.8 °C on average) and the coldest is February (-7.3 °C). Rainfall peaks in August.
Larsmo averages 155 frost days, 0 hot days (≥ 30 °C) and 120 rainy days per year.
Larsmo has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 169 to 141 per year over the period.
The hottest day of the period reached 30.3 °C (on 18 July 2018) and the coldest -32.6 °C (on 29 January 1999).
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
LarsmoOstrobothnia
- coords
- 63.75°, 22.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.7°C
Average daily high
6.0°C
Average daily low
1.3°C
Annual rainfall
567mm
Sunshine / day
7.6h
Mean relative humidity
82%
Average peak wind
21.8km/h
Seasonal range
23.1°C
Frost days (< 0 °C)
155 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
111.8 cm
Average feels-like high
2.4 °C
Average feels-like low
-2.9 °C
Average peak gust
38.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.29 · 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
30.3 °C
18 July 2018
Coldest day
-32.6 °C
29 January 1999
Wettest day
101 mm
6 August 1967
Windiest day
60.7 km/h
26 December 1992
Strongest gust
108.4 km/h
2 November 2020
Hottest feels-like
32.1 °C
30 July 2018
Coldest feels-like
-38.2 °C
8 January 1987
Snowiest day
16.9 cm
14 December 1964
Sunniest day
19.1 h
29 June 1941
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 | +2.8 °C | 52 mm | +19 mm |
| Feb | -1.9 °C | +3.2 °C | 17 mm | -10 mm |
| Mar | 2.3 °C | +3.6 °C | 24 mm | -3 mm |
| Apr | 6.2 °C | +2.3 °C | 18 mm | -16 mm |
| May | 9.5 °C | -0.2 °C | 31 mm | -8 mm |
| Jun | 14.3 °C | 0.0 °C | 64 mm | +15 mm |
| Jul | 21.5 °C | +3.1 °C | 67 mm | +2 mm |
| Aug | 17.7 °C | +0.3 °C | 111 mm | +36 mm |
| Sep | 15.8 °C | +3.2 °C | 83 mm | +18 mm |
| Oct | 8.8 °C | +2.2 °C | 62 mm | +5 mm |
| Nov | 3.6 °C | +1.9 °C | 55 mm | +3 mm |
| Dec | 2.4 °C | +3.9 °C | 81 mm | +37 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 Larsmo?
Larsmo has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 3.7 °C and it receives 567 mm of precipitation per year.
What is the hottest day ever recorded in Larsmo?
The hottest day measured in Larsmo between 1940 and 2025 was 18 July 2018, reaching 30.3 °C.
What is the coldest day in Larsmo?
The coldest day measured in Larsmo between 1940 and 2025 was 29 January 1999, at -32.6 °C.
Does it snow in Larsmo?
Yes. Larsmo gets on average 111.8 cm of snow per year and has around 155 frost days.
Has the climate of Larsmo warmed?
Yes: Larsmo warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Larsmo?
The wettest day measured in Larsmo between 1940 and 2025 was 6 August 1967, with 101 mm of rain in 24 hours.
What was the windiest day in Larsmo?
The windiest day measured in Larsmo between 1940 and 2025 was 26 December 1992, with winds reaching 60.7 km/h.
What is the warmest month in Larsmo?
The warmest month in Larsmo is July (15.8 °C on average); the coldest is February (-7.3 °C).
How much does it rain in Larsmo?
Larsmo receives on average 567 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in Larsmo?
Larsmo 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 Larsmo?
The heaviest 24-hour snowfall measured in Larsmo between 1940 and 2025 was 14 December 1964, with 16.9 cm.
Are there tropical nights in Larsmo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Larsmo.
What was the most extreme apparent temperature in Larsmo?
In Larsmo, between 1940 and 2025, the highest apparent temperature reached 32.1 °C on 30 July 2018, and the lowest was -38.2 °C on 8 January 1987.
Compare Larsmo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Larsmo