Helsinki Weather: September
 |
Average Day Temperature: | 60.3°F |
|
Average Night Temperature: | 53.1°F |
|
Sea Water Temperature: | 59.7°F |
|
Number of Sunny Days: | 9 days |
| Sunshine Hours: | 11.5 - 14.2 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.7 in | |
| detailed information | ||
14 day weather
forecast
forecast
| Helsinki |
Sea Water
Temperature
Temperature
| Helsinki |
Air Temperature in September, °F
The highest day temperature in September 2026 was 68°F. The lowest night temperature was 42°F. The average values for day and night temperatures during September were 60.1°F и 52.5°F respectivly.
Helsinki Water Sea Temperature in September, °F
The average sea surface temperature in September 2026 for Helsinki was 58.8°F. The maximum and minimum values were 55.0°F and 62.0°F respectively.
Sunny, Cloudy and Gloomy days
You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Helsinki is 1.7 in.
Wind Speed in September, mph
The average wind speed in September is 10.2 mph.
Average Sunny Hours Per Day
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 September is 6.8 hours.
Helsinki on the Weather Map
Finland Resorts:
NAME
F°
| Espoo |  |
+36 |
| Helsinki | |
+36 |
| Imatra | |
+34 |
| Juvaskyla | |
+30 |
| Kemi |  |
+46 |
| Koli National Park | |
+38 |
| Lahti | |
+32 |
| Lappeenranta | |
+34 |
| Oulu |  |
+36 |
| Pori | |
+34 |
| Saariselka | |
+38 |
| Savolinna | |
+34 |
| Seinajoki | |
+32 |
| Turku | |
+34 |
| Vaasa | |
+40 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Helsinki
Local time: 10:26
19 oct, monday
| 1200 |  |
46°F | NW 4 mph |
| 1500 | |
48°F | N 4 mph |
| 1800 |  |
42°F | NW 4 mph |
| 2100 | |
42°F | N 4 mph |
20 oct, tuesday
| 0000 | |
42°F | N 5 mph |
| 0300 | |
40°F | N 4 mph |
| 0600 | |
40°F | NW 6 mph |
| 0900 | |
40°F | NW 6 mph |