Koli National Park Weather: September
 |
Average Day Temperature: | 55.5°F |
|
Average Night Temperature: | 47.1°F |
|
Sea Water Temperature: | 57.2°F |
|
Number of Sunny Days: | 7 days |
| Sunshine Hours: | 11.5 - 14.5 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.8 in | |
| detailed information | ||
forecast
| Koli National Park |
Temperature
| Koli National Park |
Air Temperature in September, °F
The highest day temperature in September 2025 was 71°F. The lowest night temperature was 38°F. The average values for day and night temperatures during September were 59.2°F и 51.1°F respectivly.
Koli National Park Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Koli National Park was 60.1°F. The maximum and minimum values were 54.8°F and 63.4°F respectively.
Most of the days in September are gloomy but you can also expect sunny days.
Precipitation Totals in September, in
Precipitation total in September for Koli National Park is 1.8 in. It makes september one of the most rainy months of the year.
The average wind speed in September is 8.8 mph. It makes September one of the most windy months of the year for Koli National Park.
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 Koli National Park in September is 5.6 hours.
Koli National Park on the Weather Map
| Espoo |  |
+38 |
| Helsinki | |
+38 |
| Juvaskyla | |
+34 |
| Kemi |  |
+30 |
| Koli National Park | |
+34 |
| Kotka | |
+40 |
| Lahti | |
+36 |
| Lappeenranta | |
+36 |
| Oulu | |
+34 |
| Pori | |
+38 |
| Saariselka | |
+14 |
| Savolinna | |
+36 |
| Turku | |
+40 |
| Vaasa |  |
+38 |
| Vantaa | |
+38 |
| 1200 |  |
34°F | NE 7 mph |
| 1500 |  |
32°F | NE 6 mph |
| 1800 | |
34°F | NE 7 mph |
| 2100 | |
34°F | E 6 mph |
| 0000 | |
34°F | E 5 mph |
| 0300 | |
32°F | SE 2 mph |
| 0600 | |
32°F | SW 2 mph |
| 0900 | |
32°F | W 4 mph |