Weather stations › Hanko Tvärminne
Weather station · 100953
Hanko Tvärminne
Coordinates
59.84°N, 23.25°E
Elevation
3 m
Data since
01.01.1963
Observation period
1963–2026 · 64 yr
Climate summary
Annual mean temperature
6.1 °C
whole-period average
Precipitation / year
615 mm
mean annual precipitation
Hot days / year
4
max ≥ 25 °C
Ice days / year
52
max < 0 °C
Annual mean temperature 1963–2025
▲ +2.9 °C over the period
Climate normals · monthly
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high | 7.7 | 8.5 | 14.4 | 19.7 | 25.5 | 28.2 | 30.9 | 28.0 | 23.2 | 16.1 | 12.9 | 9.5 | 30.9 |
| Mean maximum | 4.6 | 4.3 | 7.5 | 14.3 | 21.0 | 23.8 | 26.2 | 24.6 | 19.6 | 14.0 | 9.4 | 6.2 | 27.1 |
| Average high | 0.0 | -0.8 | 1.9 | 6.8 | 13.0 | 17.6 | 21.0 | 20.0 | 15.2 | 9.4 | 5.0 | 2.2 | 9.3 |
| Daily mean | -2.1 | -3.2 | -0.7 | 3.6 | 9.3 | 14.0 | 17.5 | 16.9 | 12.6 | 7.3 | 3.2 | 0.3 | 6.6 |
| Average low | -4.5 | -5.6 | -3.5 | 0.8 | 5.8 | 10.6 | 14.3 | 13.9 | 10.0 | 5.1 | 1.3 | -1.9 | 3.9 |
| Mean minimum | -15.3 | -15.4 | -11.8 | -4.0 | 0.4 | 5.9 | 10.0 | 9.2 | 4.1 | -2.0 | -5.6 | -10.5 | -18.5 |
| Record low | -26.3 | -24.5 | -22.0 | -9.6 | -1.9 | 3.3 | 7.9 | 5.4 | 0.8 | -9.2 | -13.7 | -22.4 | -26.3 |
| Precipitation (mm) | 55 | 39 | 36 | 31 | 33 | 49 | 51 | 78 | 53 | 76 | 71 | 62 | 634 |
| Maximum snow depth (cm) | 16 | 19 | 20 | 10 | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 9 | 26 |
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 · 28.7.
Measured for this calendar day
Warmest
30.9°
2019
Coldest
10.5°
1987
On average
17.7°
63-year average
Wettest
30.2 mm
1988
Open in tools
Source: Finnish Meteorological Institute open data. Statistics are computed over the station's entire observation period.