Helsinki Weather: May
 |
Average Day Temperature: | 54.6°F |
|
Average Night Temperature: | 44.6°F |
|
Sea Water Temperature: | 44.4°F |
|
Number of Sunny Days: | 14 days |
| Sunshine Hours: | 16.0 - 18.3 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.3 in | |
| detailed information | ||
forecast
| Helsinki |
Temperature
| Helsinki |
Air Temperature in May, °F
The highest day temperature in May 2025 was 62°F. The lowest night temperature was 31°F. The average values for day and night temperatures during May were 52.3°F и 42.7°F respectivly.
Helsinki Water Sea Temperature in May, °F
The average sea surface temperature in May 2025 for Helsinki was 45.9°F. The maximum and minimum values were 41.0°F and 52.6°F respectively.
Most of the days in May are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in May, in
Precipitation total in May for Helsinki is 1.3 in. It makes may one of the least rainy months of the year.
The average wind speed in May is 8.8 mph. It makes May the most windless month of the year for Helsinki.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Helsinki in May is 10.6 hours.
Helsinki on the Weather Map
| Espoo |  |
+40 |
| Helsinki | |
+40 |
| Juvaskyla | |
+34 |
| Kemi | |
+28 |
| Koli National Park | |
+34 |
| Kotka | |
+40 |
| Lahti |  |
+36 |
| Lappeenranta | |
+36 |
| Oulu | |
+32 |
| Pori | |
+38 |
| Saariselka | |
+8 |
| Savolinna | |
+36 |
| Turku | |
+40 |
| Vaasa | |
+38 |
| Vantaa | |
+38 |
| 0900 |  |
40°F | W 11 mph |
| 1200 | |
40°F | NW 11 mph |
| 1500 |  |
40°F | NW 11 mph |
| 1800 | |
40°F | NW 11 mph |
| 2100 | |
38°F | N 9 mph |
| 0000 | |
40°F | N 9 mph |
| 0300 | |
40°F | N 7 mph |
| 0600 | |
40°F | N 6 mph |