Harjumaa (Tallinn)
September
Weather in Harjumaa for September 2026
Your guide to Harjumaa weather in September - trends and predictions
Tugev tuul Tase 1 - See hour by hour.
Until now, September 2026 in Harjumaa is cooler than usual, with temperatures averaging 16.2 °C, this is 2.5 °C below the typical seasonal average.
Expect cooler weather in the next days in Harjumaa with the forecast suggesting a temperature of 13.6 °C, lower than the historical average.
In general, the average temperature in Harjumaa at the beginning of September is 20.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.3 °C by the end of September.
Harjumaa experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 55.5 mm.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
20
Dry days
10
Rainy days
0
Snow days
18°/11°
Temperatures
18 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° | 2.7 mm | 4 | |
| 2 Sept. |  Moderate or heavy rain with thunder | 19° /11° | 4.3 mm | 4 | |
| 3 Sept. | Light rain shower | 20° /11° | 1.1 mm | 4 | |
| 4 Sept. |  Sunny | 21° /11° | 2.2 mm | 5 | |
| 5 Sept. |  Overcast | 22° /12° | 1 mm | 4 | |
| 6 Sept. | Sunny | 20° /11° | 0.2 mm | 5 | |
| 7 Sept. | Sunny | 21° /11° | 0.1 mm | 5 | |
| 8 Sept. |  Cloudy | 22° /12° | 0.2 mm | 4 | |
| 9 Sept. |  Partly cloudy | 22° /13° | 1.6 mm | 4 | |
| 10 Sept. | Cloudy | 21° /13° | 3.4 mm | 4 | |
| 11 Sept. |  Mist | 20° /12° | 3.8 mm | 4 | |
| 12 Sept. | Sunny | 19° /11° | 0.7 mm | 4 | |
| 13 Sept. | Light rain shower | 18° /13° | 11.5 mm | 3 | |
| 14 Sept. | Overcast | 18° /11° | 5.1 mm | 4 | |
| 15 Sept. | Cloudy | 16° /9° | 0.7 mm | 3 | |
| 16 Sept. | Partly cloudy | 19° /10° | 1.4 mm | 4 | |
| 17 Sept. | Light rain shower | 18° /10° | 2.5 mm | 3 | |
| 18 Sept. | Overcast | 17° /9° | 1.6 mm | 3 | |
| 19 Sept. |  Moderate rain | 18° /10° | 3.2 mm | 4 | |
| 20 Sept. |  Light drizzle | 18° /11° | 1.9 mm | 4 | |
| 21 Sept. | Cloudy | 19° /11° | 0.7 mm | 4 | |
| 22 Sept. | Sunny | 16° /9° | 0.4 mm | 4 | |
| 23 Sept. | Light rain shower | 15° /8° | 2.7 mm | 3 | |
| 24 Sept. | Patchy light drizzle | 15° /8° | 2.4 mm | 4 | |
| 25 Sept. | Mist | 15° /9° | 2.9 mm | 3 | |
| 26 Sept. | Overcast | 16° /10° | 0.8 mm | 4 | |
| 27 Sept. | Sunny | 14° /11° | 1.4 mm | 1.8 | |
| 28 Sept. | Sunny | 16° /9° | 0 mm | 1.5 | |
| 29 Sept. | Overcast | 15° /12° | 0 mm | 0.8 | |
| 30 Sept. | Overcast | 16° /13° | 0.2 mm | 0.6 | |
| 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.
Change Month
Harjumaa in September - FAQ
What are the expected maximum and minimum temperatures in Harjumaa during September?
Enjoy moderate daytime temperatures of up to 18° 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 55.5 mm spread over approximately 10 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 18 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 💧
Typically, Harjumaa has 10 rainy days in September with a total of 55.5 mm of rainfall.
UV exposure in Harjumaa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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