Koillismaa (Kuusamo)
September
Weather in Koillismaa for September 2025
Your guide to Koillismaa weather in September - trends and predictions
In general, the average temperature in Koillismaa at the beginning of September is 17 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.9 °C by the end of September.
Koillismaa experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 172.5 mm.
Temperatures
Rain 🌧️
20
Dry days
10
Rainy days
0
Snow days
15°/5°
Temperatures
18 km/h
Avg max wind
85 %
Avg humidity
Koillismaa Weather September
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Temperatures trend during September in Koillismaa
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September weather in Koillismaa day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 14° /11° | 3.6 mm | 4 | |
| 2 Sept. | Light rain shower | 17° /9° | 2.9 mm | 4 | |
| 3 Sept. |  Fog | 20° /9° | 0.8 mm | 5 | |
| 4 Sept. | Light rain shower | 17° /9° | 1.6 mm | 4 | |
| 5 Sept. | Patchy rain possible | 17° /8° | 1.5 mm | 4 | |
| 6 Sept. |  Overcast | 17° /7° | 0 mm | 4 | |
| 7 Sept. | Overcast | 17° /8° | 0.1 mm | 4 | |
| 8 Sept. | Overcast | 19° /8° | 0 mm | 5 | |
| 9 Sept. | Fog | 20° /10° | 0 mm | 5 | |
| 10 Sept. | Overcast | 20° /11° | 0.1 mm | 5 | |
| 11 Sept. | Fog | 18° /11° | 0.1 mm | 4 | |
| 12 Sept. | Overcast | 18° /12° | 4.9 mm | 4 | |
| 13 Sept. | Mist | 16° /9° | 2.8 mm | 4 | |
| 14 Sept. | Mist | 11° /6° | 4.6 mm | 3 | |
| 15 Sept. | Mist | 10° /5° | 7.2 mm | 3 | |
| 16 Sept. | Fog | 11° /3° | 0.5 mm | 3 | |
| 17 Sept. | Light rain shower | 9° /6° | 13.2 mm | 2 | |
| 18 Sept. |  Partly cloudy | 12° /3° | 0 mm | 3 | |
| 19 Sept. |  Light drizzle | 13° /5° | 3.8 mm | 4 | |
| 20 Sept. | Light rain shower | 12° /3° | 2.8 mm | 4 | |
| 21 Sept. | Light drizzle | 6° /2° | 2.3 mm | 2 | |
| 22 Sept. | Fog | 12° /2° | 0.1 mm | 3 | |
| 23 Sept. | Light rain shower | 10° /5° | 12.2 mm | 3 | |
| 24 Sept. | Light rain shower | 11° /5° | 2.6 mm | 3 | |
| 25 Sept. | Light drizzle | 12° /6° | 3 mm | 3 | |
| 26 Sept. | Patchy rain possible | 12° /6° | 2.4 mm | 3 | |
| 27 Sept. | Overcast | 13° /5° | 7.4 mm | 3 | |
| 28 Sept. | Fog | 11° /3° | 1.9 mm | 3 | |
| 29 Sept. | Light rain shower | 9° /3° | 1.2 mm | 3 | |
| 30 Sept. | Light rain shower | 8° /4° | 2.9 mm | 3 | |
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Important Notice
Our weather forecast for Koillismaa in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Koillismaa forecast closer to your planned date for the most up-to-date weather information.
Change Month
Koillismaa in September - FAQ
What are the expected maximum and minimum temperatures in Koillismaa during September?
During September, expect a variety of temperatures with highs around 15° and lows near 5°, suitable for diverse activities and preferences.
How much rainfall should be expected in Koillismaa during September?
Significant rainfall exceeding 172.5 mm is expected in Koillismaa during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Koillismaa during September?
The average wind speed in Koillismaa during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Koillismaa
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