easeweather.com
South Ostrobothnia (Lappajärvi)
ÄkäslompoloEnontekiöEspooHelsinkiIso-SyöteIvaloKemiKeräläKilpisjärviKittiläKuusamoLappajärviLeviOuluPyhäRovaniemiRukaSaariselkaSirkkaTampereTurkuVaasaVantaa More Locations
Finland weather

Weather in South Ostrobothnia for September 2027

Your guide to South Ostrobothnia weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in South Ostrobothnia at the beginning of September is 19.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.7 °C by the end of September.

    • Rain 🌧️

  • The climate of South Ostrobothnia in September is notably wet, with an average of 13 rainy days, and a total of 75 mm of precipitation.

    • More

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

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/8°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
81 %
Avg humidity

South Ostrobothnia Weather September

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

Temperatures trend during September in South Ostrobothnia

See the weather trend as well as the moving average line

September weather in South Ostrobothnia day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 2 mm 3
2 Sept. Mist
Mist
 20° /9° 0.6 mm 3.1
3 Sept. Light rain
Light rain
 18° /10° 3.6 mm 3
4 Sept. Sunny
Sunny
 21° /10° 0.3 mm 2.9
5 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 0.5 mm 2.9
6 Sept. Sunny
Sunny
 20° /10° 0 mm 2.8
7 Sept. Light rain
Light rain
 21° /10° 4.3 mm 2.7
8 Sept. Light rain
Light rain
 19° /12° 2.8 mm 2.7
9 Sept. Light rain
Light rain
 19° /13° 6 mm 2.6
10 Sept. Light rain
Light rain
 19° /12° 4 mm 2.5
11 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 2.3 mm 2.4
12 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 2.1 mm 2.4
13 Sept. Overcast
Overcast
 16° /9° 0.9 mm 2.3
14 Sept. Patchy rain possible
Patchy rain possible
 15° /8° 1.1 mm 2.2
15 Sept. Light rain
Light rain
 14° /7° 4.6 mm 2
16 Sept. Light rain
Light rain
 16° /8° 3.2 mm 2.1
17 Sept. Light rain
Light rain
 14° /9° 5.6 mm 2
18 Sept. Patchy rain possible
Patchy rain possible
 15° /7° 1.8 mm 2
19 Sept. Patchy rain possible
Patchy rain possible
 17° /8° 1.4 mm 1.9
20 Sept. Light rain
Light rain
 15° /8° 3 mm 1.8
21 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 1.8 mm 1.8
22 Sept. Light rain
Light rain
 12° /4° 2.7 mm 1.7
23 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 11° /4° 7.3 mm 1.7
24 Sept. Patchy rain possible
Patchy rain possible
 13° /6° 2.1 mm 1.6
25 Sept. Patchy rain possible
Patchy rain possible
 15° /8° 0.7 mm 1.6
26 Sept. Light rain
Light rain
 12° /7° 2.6 mm 1.5
27 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /6° 5.3 mm 1.4
28 Sept. Patchy rain possible
Patchy rain possible
 13° /5° 0.3 mm 1.4
29 Sept. Patchy rain possible
Patchy rain possible
 11° /4° 1.8 mm 1.3
30 Sept. Partly cloudy
Partly cloudy
 11° /3° 0 mm 1.3
Next
Important Notice
Our weather forecast for South Ostrobothnia 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 South Ostrobothnia forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

South Ostrobothnia in September - FAQ

What are the expected maximum and minimum temperatures in South Ostrobothnia during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in South Ostrobothnia during September?
Moderate rainfall is anticipated in South Ostrobothnia during September, with a total of 75 mm spread over approximately 13 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in South Ostrobothnia during September?
The average wind speed in South Ostrobothnia during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in South Ostrobothnia

Explore the daily rainfall trends and prepare for South Ostrobothnias September weather 💧
Typically, South Ostrobothnia has 13 rainy days in September with a total of 75 mm of rainfall.

UV exposure in South Ostrobothnia during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in South Ostrobothnia
Select a province for an accurate weather forecast
Järviseutu
Top locations in South Ostrobothnia
Select a location for an accurate weather forecast
Lappajärvi
More Locations
Quick links
More South Ostrobothnia weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.