Weather in Finland for September 2027
In general, the average temperature in Finland at the beginning of September is 13.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 9.7 °C by the end of September.
The climate of Finland in September is notably wet, with an average of 11 rainy days, and a total of 75.1 mm of precipitation.
Is September a good time to visit Finland? check out the best time to travel to Finland page.
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Finland Weather September
What’s the Weather Like in Finland This September?
Temperatures trend during September in Finland
September weather in Finland day by day
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain | 13° /8° | 5.4 mm | 0 cm | |
| 2 Sept. |  Patchy rain possible | 13° /8° | 2 mm | 0 cm | |
| 3 Sept. | Patchy rain possible | 14° /7° | 1.2 mm | 0 cm | |
| 4 Sept. | Light rain | 13° /8° | 5.7 mm | 0 cm | |
| 5 Sept. | Patchy rain possible | 14° /8° | 1.6 mm | 0 cm | |
| 6 Sept. |  Overcast | 14° /7° | 0.2 mm | 0 cm | |
| 7 Sept. | Patchy rain possible | 13° /7° | 1.5 mm | 0 cm | |
| 8 Sept. | Light rain | 14° /8° | 2.8 mm | 0 cm | |
| 9 Sept. | Patchy rain possible | 15° /8° | 1.1 mm | 0 cm | |
| 10 Sept. |  Sunny | 16° /8° | 0.4 mm | 0 cm | |
| 11 Sept. | Overcast | 15° /8° | 0.3 mm | 0 cm | |
| 12 Sept. | Overcast | 15° /8° | 0.3 mm | 0 cm | |
| 13 Sept. | Light rain | 11° /7° | 3.7 mm | 0 cm | |
| 14 Sept. | Light rain | 11° /5° | 3.8 mm | 0 cm | |
| 15 Sept. | Light rain | 11° /5° | 2.9 mm | 0 cm | |
| 16 Sept. | Light drizzle | 10° /6° | 1.8 mm | 0 cm | |
| 17 Sept. | Light rain | 11° /6° | 5.7 mm | 0 cm | |
| 18 Sept. | Overcast | 10° /5° | 0.9 mm | 0 cm | |
| 19 Sept. | Light rain | 11° /6° | 4.6 mm | 0 cm | |
| 20 Sept. | Light rain | 9° /4° | 5.7 mm | 0 cm | |
| 21 Sept. | Light rain | 7° /3° | 4 mm | 0.1 cm | |
| 22 Sept. | Patchy rain possible | 10° /4° | 1.2 mm | 0 cm | |
| 23 Sept. | Patchy rain possible | 9° /5° | 1.6 mm | 0 cm | |
| 24 Sept. | Patchy rain possible | 9° /4° | 2.2 mm | 0 cm | |
| 25 Sept. | Light rain | 10° /5° | 3.8 mm | 0 cm | |
| 26 Sept. | Patchy rain possible | 11° /6° | 1.9 mm | 0 cm | |
| 27 Sept. | Light rain | 10° /6° | 5.5 mm | 0 cm | |
| 28 Sept. | Overcast | 10° /5° | 0.5 mm | 0 cm | |
| 29 Sept. | Patchy rain possible | 9° /5° | 2.1 mm | 0 cm | |
| 30 Sept. | Overcast | 8° /4° | 0.7 mm | 0 cm | |
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Guide for Finland in September
In September, Finland experiences a transition from late summer to early autumn, bringing about noticeable changes in the weather. At the beginning of the month, southern Finland typically enjoys mild temperatures with occasional showers.
Helsinki, for example, can expect temperatures around 15° at the start of September, with a mix of sunny and cloudy days. As the month progresses, the temperatures gradually begin to drop, and by the end of September, the weather becomes noticeably cooler.
In the northern regions, such as Rovaniemi, the temperatures at the beginning of the month hover around 10°, and by the end of September, they can drop to around 5°. The autumn foliage starts to appear, creating picturesque landscapes across the country.
September also marks the beginning of the aurora borealis season in Lapland, offering a chance to witness the mesmerizing Northern Lights as the nights grow longer.
It's important to note that the weather in Finland can be quite unpredictable, so it's advisable to pack layers and be prepared for sudden changes.
Overall, September in Finland offers a beautiful transition from the warmth of summer to the crispness of autumn, making it an ideal time to explore the country's natural beauty.