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Finland weather

Weather in Southwest Finland for September 2027

Your guide to Southwest Finland weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Southwest Finland at the beginning of September is 18.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14 °C by the end of September.

    • Rain 🌧️

  • The climate of Southwest Finland in September is notably wet, with an average of 12 rainy days, and a total of 94.7 mm of precipitation.

    • More

  • Is September a good time to visit Southwest Finland? check out the best time to travel to Southwest Finland page.

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/11°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Southwest Finland Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain
18°
2
Light rain
17°
3
Patchy rain possible
17°
4
Sunny
19°
5
Overcast
20°
6
Sunny
19°
7
Patchy rain possible
19°
8
Patchy rain possible
20°
9
Light rain
20°
10
Light rain
19°
11
Patchy rain possible
19°
12
Light rain
17°
13
Patchy rain possible
17°
14
Light rain
15°
15
Light rain
15°
16
Light rain
16°
17
Light rain
15°
18
Light rain
15°
19
Light rain
16°
20
Light rain
16°
21
Light rain
17°
22
Patchy rain possible
14°
23
Light rain
14°
24
Patchy rain possible
14°
25
Light rain
14°
26
Light rain
14°
27
Light rain
15°
28
Patchy rain possible
14°
29
Mist
13°
30
Light rain shower
13°

Temperatures trend during September in Southwest Finland

See the weather trend as well as the moving average line

September weather in Southwest Finland day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain
Light rain
 18° /12° 8.6 mm 3.7
2 Sept. Light rain
Light rain
 17° /11° 2.6 mm 3
3 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 1.2 mm 3.6
4 Sept. Sunny
Sunny
 19° /12° 0 mm 3.5
5 Sept. Overcast
Overcast
 20° /12° 0.1 mm 3.4
6 Sept. Sunny
Sunny
 19° /11° 0.2 mm 3.3
7 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 1 mm 3.2
8 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 1.7 mm 3.2
9 Sept. Light rain
Light rain
 20° /15° 6.2 mm 3.1
10 Sept. Light rain
Light rain
 19° /14° 3.4 mm 3
11 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 1.5 mm 2.9
12 Sept. Light rain
Light rain
 17° /13° 3.4 mm 2.9
13 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 1.2 mm 2.8
14 Sept. Light rain
Light rain
 15° /9° 9.5 mm 2.7
15 Sept. Light rain
Light rain
 15° /9° 4.4 mm 2.6
16 Sept. Light rain
Light rain
 16° /12° 6.5 mm 2.6
17 Sept. Light rain
Light rain
 15° /11° 3.9 mm 2.5
18 Sept. Light rain
Light rain
 15° /10° 2.5 mm 2.4
19 Sept. Light rain
Light rain
 16° /11° 3 mm 2.4
20 Sept. Light rain
Light rain
 16° /11° 4.4 mm 2.3
21 Sept. Light rain
Light rain
 17° /11° 3 mm 2.2
22 Sept. Patchy rain possible
Patchy rain possible
 14° /9° 0.3 mm 2.2
23 Sept. Light rain
Light rain
 14° /8° 5.7 mm 2.1
24 Sept. Patchy rain possible
Patchy rain possible
 14° /9° 0.7 mm 2
25 Sept. Light rain
Light rain
 14° /10° 3.6 mm 2
26 Sept. Light rain
Light rain
 14° /11° 5.8 mm 1.9
27 Sept. Light rain
Light rain
 15° /11° 6.2 mm 1.8
28 Sept. Patchy rain possible
Patchy rain possible
 14° /9° 2.2 mm 1.8
29 Sept. Mist
Mist
 13° /9° 0.6 mm 1.7
30 Sept. Light rain shower
Light rain shower
 13° /7° 1.2 mm 1.7
Next
Important Notice
Our weather forecast for Southwest Finland 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 Southwest Finland forecast closer to your planned date for the most up-to-date weather information.
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Southwest Finland in September - FAQ

What are the expected maximum and minimum temperatures in Southwest Finland during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Southwest Finland during September?
Moderate rainfall is anticipated in Southwest Finland during September, with a total of 94.7 mm spread over approximately 12 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Southwest Finland during September?
The average wind speed in Southwest Finland during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Southwest Finland

Explore the daily rainfall trends and prepare for Southwest Finlands September weather 💧
Typically, Southwest Finland has 12 rainy days in September with a total of 94.7 mm of rainfall.
Provinces in Southwest Finland
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Turku
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