Tallinn
September
Weather in Tallinn for September 2026
Your guide to Tallinn weather in September - trends and predictions
Tugev tuul Tase 1 - See hour by hour.
Until now, September 2026 in Tallinn 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 Tallinn with the forecast suggesting a temperature of 13.6 °C, lower than the historical average.
In general, the average temperature in Tallinn 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.
Tallinn 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
Tallinn Weather September
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Temperatures trend during September in Tallinn
See the weather trend as well as the moving average line
September weather in Tallinn 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 Tallinn 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 Tallinn forecast closer to your planned date for the most up-to-date weather information.
Change Month
Tallinn in September - FAQ
What are the expected maximum and minimum temperatures in Tallinn 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 Tallinn during September?
Moderate rainfall is anticipated in Tallinn 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 Tallinn during September?
The average wind speed in Tallinn during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Tallinn
Explore the daily rainfall trends and prepare for Tallinns September weather 💧
Typically, Tallinn has 10 rainy days in September with a total of 55.5 mm of rainfall.
UV exposure in Tallinn during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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