Weather stations › Jomala Maarianhamina lentoasema
Weather station · 100907
Jomala Maarianhamina lentoasema
Coordinates
60.13°N, 19.90°E
Elevation
2 m
Data since
01.01.1959
Observation period
1959–2026 · 67 yr
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Climate summary
Annual mean temperature
6.0°C
whole-period average
Precipitation / year
545mm
mean annual precipitation
Hot days / year
5
max ≥ 25 °C
Ice days / year
45
max < 0 °C
Annual mean temperature 1959–2025
▲ +2.6 °C over the period
1959anomaly from the period average · gaps shown in dark grey2025
Climate normals · monthly
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high | 9.8 | 9.7 | 17.0 | 20.0 | 27.1 | 28.2 | 30.8 | 28.6 | 24.3 | 18.0 | 16.6 | 11.1 | 30.8 |
| Mean maximum | 5.8 | 5.8 | 9.9 | 15.3 | 21.8 | 23.5 | 26.0 | 25.0 | 19.9 | 14.6 | 9.9 | 7.0 | 27.0 |
| Average high | 1.0 | 0.4 | 3.0 | 7.9 | 13.6 | 17.5 | 20.7 | 19.8 | 15.4 | 9.6 | 5.5 | 2.8 | 9.8 |
| Daily mean | -1.2 | -2.2 | -0.1 | 3.9 | 9.1 | 13.4 | 16.9 | 16.2 | 12.0 | 6.8 | 3.5 | 0.8 | 6.6 |
| Average low | -4.2 | -5.3 | -3.5 | 0.0 | 4.3 | 8.7 | 12.4 | 11.7 | 7.9 | 3.6 | 1.0 | -1.9 | 2.9 |
| Mean minimum | -15.5 | -15.8 | -13.1 | -5.8 | -2.8 | 2.1 | 5.5 | 4.3 | 0.1 | -5.1 | -7.3 | -10.7 | -19.6 |
| Record low | -28.5 | -28.1 | -21.4 | -9.3 | -5.4 | -1.3 | 2.1 | 0.7 | -3.0 | -10.8 | -20.0 | -20.6 | -28.5 |
| Precipitation (mm) | 39 | 28 | 33 | 32 | 19 | 41 | 49 | 69 | 48 | 58 | 25 | 37 | 476 |
| Maximum snow depth (cm) | 8 | 15 | 9 | 4 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 6 | 9 |
All values for the selected period · temperatures °C · snow: mean of the maximum snow depth; the Year column covers the whole year
Records
Extremes over the entire observation period
On this day · 29.9.
Measured for this calendar day
Warmest
18.2°C
2011
Coldest
−5.1°C
1976
On average
9.3°C
63-year average
Wettest
12mm
1974
Open in tools
Source: Finnish Meteorological Institute open data. Statistics are computed over the station's entire observation period.