Harjumaa (Tallinn)
September
Weather in Harjumaa for September 2025
Your guide to Harjumaa weather in September - trends and predictions
Storm Gusts Warning - See hour by hour.
Until now, September 2025 in Harjumaa has been nearly identical to the historical average, with a temperature of 20.5 °C (showing only a slight deviation of -0.1 °C).
The forecast for the next days in Harjumaa predicts a temperature of 12.6 °C, which is cooler than the historical average.
In general, the average temperature in Harjumaa at the beginning of September is 21 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.9 °C by the end of September.
The climate of Harjumaa in September is notably wet, with an average of 15 rainy days, and a total of 66.7 mm of precipitation.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
15
Dry days
15
Rainy days
0
Snow days
19°/11°
Temperatures
17 km/h
Avg max wind
77 %
Avg humidity
Harjumaa Weather September
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Temperatures trend during September in Harjumaa
See the weather trend as well as the moving average line
September weather in Harjumaa day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 19° /11° | 1.8 mm | 4 | |
| 2 Sept. |  Moderate or heavy rain with thunder | 19° /11° | 5.2 mm | 5 | |
| 3 Sept. | Light rain shower | 21° /12° | 1.4 mm | 5 | |
| 4 Sept. |  Sunny | 22° /12° | 0 mm | 6 | |
| 5 Sept. | Sunny | 23° /13° | 0 mm | 6 | |
| 6 Sept. | Sunny | 21° /12° | 0.1 mm | 5 | |
| 7 Sept. |  Partly cloudy | 22° /12° | 0.2 mm | 5 | |
| 8 Sept. |  Cloudy | 23° /13° | 0.1 mm | 5 | |
| 9 Sept. | Partly cloudy | 23° /12° | 0 mm | 6 | |
| 10 Sept. | Cloudy | 21° /14° | 0.6 mm | 5 | |
| 11 Sept. |  Mist | 22° /14° | 1.7 mm | 5 | |
| 12 Sept. | Sunny | 20° /13° | 0.6 mm | 5 | |
| 13 Sept. | Light rain shower | 19° /13° | 14.4 mm | 4 | |
| 14 Sept. |  Overcast | 19° /12° | 6.7 mm | 4 | |
| 15 Sept. | Cloudy | 16° /10° | 1 mm | 4 | |
| 16 Sept. | Partly cloudy | 21° /11° | 0 mm | 6 | |
| 17 Sept. | Patchy rain possible | 16° /11° | 3.4 mm | 0.6 | |
| 18 Sept. | Patchy rain possible | 16° /11° | 1.7 mm | 0.6 | |
| 19 Sept. | Patchy rain possible | 16° /13° | 1.6 mm | 0.6 | |
| 20 Sept. | Patchy rain possible | 16° /12° | 2.5 mm | 0.7 | |
| 21 Sept. | Patchy rain possible | 14° /11° | 3.9 mm | 3 | |
| 22 Sept. | Patchy rain possible | 11° /10° | 0 mm | 3 | |
| 23 Sept. | Patchy rain possible | 11° /8° | 0.3 mm | 2 | |
| 24 Sept. | Patchy rain possible | 10° /7° | 1.7 mm | 2 | |
| 25 Sept. | Patchy rain possible | 9° /7° | 0.1 mm | 2 | |
| 26 Sept. | Patchy rain possible | 13° /9° | 2 mm | 3 | |
| 27 Sept. | Patchy rain possible | 11° /7° | 1.6 mm | 2 | |
| 28 Sept. | Patchy rain possible | 9° /7° | 0.3 mm | 2 | |
| 29 Sept. | Patchy rain possible | 12° /6° | 1 mm | 2 | |
| 30 Sept. | Cloudy | 12° /9° | 0 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Harjumaa 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 Harjumaa forecast closer to your planned date for the most up-to-date weather information.
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Harjumaa in September - FAQ
What are the expected maximum and minimum temperatures in Harjumaa during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Harjumaa during September?
Moderate rainfall is anticipated in Harjumaa during September, with a total of 66.7 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Harjumaa during September?
The average wind speed in Harjumaa during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Harjumaa
Explore the daily rainfall trends and prepare for Harjumaas September weather 💧
UV exposure in Harjumaa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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