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Weather in Uusimaa for September 2025

Your guide to Uusimaa weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Wind Warning for Land Areas - See hour by hour.

    • Snow Forecast ❄️

  • Snowfall in Uusimaa during September is quite rare, with fewer than 2 snowy days on average.
    According to Uusimaa snow forecast for September 2025, 2 snowy days are expected until the end of the month. The closest date with snow is Saturday, 27 September.

    • Temperatures

  • So far, September 2025 in Uusimaa is slightly warmer than the historical average by 1.3 °C.

  • The forecast for the next days in Uusimaa predicts a temperature of 12.1 °C, which is cooler than the historical average.

  • In general, the average temperature in Uusimaa at the beginning of September is 17 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 8.3 °C by the end of September.

    • Rain 🌧️

  • Uusimaa in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 64.1 mm.

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
15°/9°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Uusimaa Weather September

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

What’s the Weather Like in Uusimaa This September?

Discover the average temperatures and weather trends across Uusimaa’s cities this September.
Patchy rain possibleHelsinki15 °C / 9 °CPatchy rain possibleEspoo17 °C / 11 °CCloudyVantaa18 °C / 11 °CMore Locations

Temperatures trend during September in Uusimaa

See the weather trend as well as the moving average line

September weather in Uusimaa day by day

Click on a date for more information
August October
Date Weather Temperatures Rain Snow More
1 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 1.8 mm 0 cm
2 Sept. Patchy rain possible
Patchy rain possible
 15° /9° 3.3 mm 0 cm
3 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 0.8 mm 0 cm
4 Sept. Partly cloudy
Partly cloudy
 17° /9° 0 mm 0 cm
5 Sept. Sunny
Sunny
 18° /10° 0.1 mm 0 cm
6 Sept. Overcast
Overcast
 18° /10° 0.3 mm 0 cm
7 Sept. Overcast
Overcast
 18° /10° 0.1 mm 0 cm
8 Sept. Cloudy
Cloudy
 19° /11° 0.1 mm 0 cm
9 Sept. Overcast
Overcast
 19° /12° 0.2 mm 0 cm
10 Sept. Partly cloudy
Partly cloudy
 18° /12° 0.5 mm 0 cm
11 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 2.1 mm 0 cm
12 Sept. Moderate rain at times
Moderate rain at times
 17° /12° 1.1 mm 0 cm
13 Sept. Moderate rain
Moderate rain
 17° /11° 8.8 mm 0 cm
14 Sept. Partly cloudy
Partly cloudy
 15° /10° 7.5 mm 0 cm
15 Sept. Overcast
Overcast
 14° /9° 3.9 mm 0 cm
16 Sept. Moderate rain
Moderate rain
 16° /13° 6.1 mm 0 cm
17 Sept. Moderate rain
Moderate rain
 15° /12° 10.1 mm 0 cm
18 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 2.3 mm 0 cm
19 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 4.9 mm 0 cm
20 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 0.2 mm 0 cm
21 Sept. Patchy rain possible
Patchy rain possible
 16° /8° 0.9 mm 0 cm
22 Sept. Moderate rain
Moderate rain
 13° /8° 6.6 mm 0 cm
23 Sept. Patchy rain possible
Patchy rain possible
 14° /11° 1 mm 0 cm
24 Sept. Patchy rain possible
Patchy rain possible
 13° /8° 0.5 mm 0 cm
25 Sept. Patchy rain possible
Patchy rain possible
 10° /6° 0.5 mm 0 cm
26 Sept. Patchy rain possible
Patchy rain possible
 7° /5° 1.2 mm 0 cm
27 Sept. Patchy rain possible
Patchy rain possible
 5° /3° 4.1 mm 1.2 cm
28 Sept. Patchy rain possible
Patchy rain possible
 5° /3° 2.8 mm 1.6 cm
29 Sept. Patchy rain possible
Patchy rain possible
 6° /4° 1.3 mm 0 cm
30 Sept. Partly cloudy
Partly cloudy
 12° /7° 1.4 mm 0 cm
Next
Important Notice
Our weather forecast for Uusimaa 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 Uusimaa forecast closer to your planned date for the most up-to-date weather information.
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Uusimaa in September - FAQ

What are the expected maximum and minimum temperatures in Uusimaa during September?
During September, expect a variety of temperatures with highs around 15° and lows near 9°, suitable for diverse activities and preferences.
How much rainfall should be expected in Uusimaa during September?
Moderate rainfall is anticipated in Uusimaa during September, with a total of 64.1 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Uusimaa during September?
The average wind speed in Uusimaa during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

Uusimaa snow forecast September 2025

Track daily snowfall levels and discover Uusimaa’s snowy potential this September ❄️

September rainfall patterns in Uusimaa

Explore the daily rainfall trends and prepare for Uusimaas September weather 💧
Provinces in Uusimaa
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Helsinki
Top locations in Uusimaa
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EspooHelsinkiVantaa
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Location coordinates Where is Uusimaa?

Get accurate weather forecasts for Uusimaa, located at latitude 60.17 and longitude 24.935. Stay updated with localized weather information tailored for Uusimaa.

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