Turku Weather: September
 |
Average Day Temperature: | 60.4°F |
|
Average Night Temperature: | 52.0°F |
|
Sea Water Temperature: | 60.4°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 11.5 - 14.2 hours | |
|
Number of Rainy Days: | 4 days |
| Precipitation Totals: | 1.8 in | |
| detailed information | ||
forecast
| Turku |
Temperature
| Turku |
Air Temperature in September, °F
The highest day temperature in September 2025 was 77°F. The lowest night temperature was 41°F. The average values for day and night temperatures during September were 62.9°F и 54.9°F respectivly.
Turku Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Turku was 61.6°F. The maximum and minimum values were 57.4°F and 65.0°F respectively.
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 Turku is 1.8 in.
The average wind speed in September is 9.4 mph. This value is relatively stable throughout the year.
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 Turku in September is 7.2 hours.
Turku on the Weather Map
| Espoo |  |
+38 |
| Helsinki | |
+38 |
| Juvaskyla |  |
+34 |
| Kemi |  |
+30 |
| Koli National Park | |
+32 |
| Kotka | |
+38 |
| Lahti | |
+36 |
| Lappeenranta | |
+36 |
| Oulu |  |
+34 |
| Pori | |
+38 |
| Saariselka | |
+14 |
| Savolinna | |
+34 |
| Turku | |
+40 |
| Vaasa | |
+38 |
| Vantaa | |
+38 |
| 1200 |  |
40°F | N 6 mph |
| 1500 | |
40°F | NW 6 mph |
| 1800 | |
40°F | NW 7 mph |
| 2100 | |
40°F | NW 7 mph |
| 0000 | |
40°F | NW 7 mph |
| 0300 | |
40°F | W 7 mph |
| 0600 | |
40°F | W 9 mph |
| 0900 | |
40°F | W 10 mph |