Weather in Tallinn for September 2025
In general, the average temperature in Tallinn at the beginning of September is 20.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.4 °C by the end of September.
The climate of Tallinn in September is notably wet, with an average of 15 rainy days, and a total of 66.7 mm of precipitation.
Is September a good time to visit Tallinn? check out the best time to travel to Tallinn page.
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Tallinn in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  19° | 3 20° | 4  22° | 5  23° | 6  19° | 7  21° |
| 8  22° | 9 23° | 10 21° | 11 22° | 12 22° | 13 19° | 14 19° |
| 15 15° | 16 21° | 17 19° | 18 17° | 19  20° | 20  18° | 21 19° |
| 22 18° | 23 17° | 24 18° | 25 17° | 26 17° | 27 17° | 28 17° |
| 29 15° | 30 14° |
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Temperatures trend during September in Tallinn
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 19° /11° | 2.6 mm | 5 | |
| 2 Sept. | Moderate or heavy rain with thunder | 19° /12° | 7.8 mm | 5 | |
| 3 Sept. | Light rain shower | 20° /12° | 1.8 mm | 5 | |
| 4 Sept. | Mist | 22° /13° | 0 mm | 6 | |
| 5 Sept. | Overcast | 23° /14° | 0 mm | 6 | |
| 6 Sept. | Sunny | 19° /11° | 0.1 mm | 6 | |
| 7 Sept. | Partly cloudy | 21° /11° | 0 mm | 6 | |
| 8 Sept. | Cloudy | 22° /12° | 0 mm | 6 | |
| 9 Sept. | Mist | 23° /12° | 0 mm | 6 | |
| 10 Sept. | Cloudy | 21° /13° | 0.8 mm | 5 | |
| 11 Sept. | Mist | 22° /13° | 2.5 mm | 5 | |
| 12 Sept. | Sunny | 22° /12° | 0.5 mm | 6 | |
| 13 Sept. | Mist | 19° /14° | 19.8 mm | 4 | |
| 14 Sept. | Overcast | 19° /12° | 6.6 mm | 5 | |
| 15 Sept. | Cloudy | 15° /11° | 1 mm | 4 | |
| 16 Sept. | Partly cloudy | 21° /11° | 0 mm | 6 | |
| 17 Sept. | Light rain shower | 19° /11° | 0.2 mm | 5 | |
| 18 Sept. | Overcast | 17° /9° | 0 mm | 4 | |
| 19 Sept. | Moderate rain | 20° /9° | 1.9 mm | 5 | |
| 20 Sept. | Light drizzle | 18° /12° | 0.9 mm | 5 | |
| 21 Sept. | Cloudy | 19° /11° | 0 mm | 5 | |
| 22 Sept. | Sunny | 18° /9° | 0 mm | 5 | |
| 23 Sept. | Light rain shower | 17° /9° | 3 mm | 4 | |
| 24 Sept. | Patchy light drizzle | 18° /10° | 0.4 mm | 5 | |
| 25 Sept. | Mist | 17° /11° | 0.6 mm | 4 | |
| 26 Sept. | Overcast | 17° /11° | 1.2 mm | 4 | |
| 27 Sept. | Light rain shower | 17° /11° | 7.1 mm | 4 | |
| 28 Sept. | Fog | 17° /11° | 2.2 mm | 4 | |
| 29 Sept. | Partly cloudy | 15° /9° | 1.3 mm | 4 | |
| 30 Sept. | Moderate or heavy rain with thunder | 14° /8° | 4.3 mm | 3 | |
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Guide for Tallinn in September
In September, Tallinn, Estonia experiences a transition from the late summer to early autumn, with gradually cooling temperatures and changing weather patterns.
At the beginning of the month, the weather in Tallinn is typically mild and pleasant, with average temperatures around 15° and occasional sunny days. However, as the month progresses, the temperatures begin to drop, and the city experiences more frequent rainfall and overcast skies.
By the end of September, the average temperatures in Tallinn decrease to around 10°, signaling the arrival of autumn.
The weather in Tallinn during September can be quite unpredictable, with a mix of sunny days, cloudy skies, and occasional rain showers. Travelers visiting Tallinn during this time should be prepared for varying weather conditions and pack layers to accommodate the changing temperatures.
Additionally, it's advisable to carry an umbrella or raincoat for the possibility of rain showers towards the end of the month.
Overall, September in Tallinn offers a transition from the warmth of summer to the cooler temperatures of autumn, making it a great time to experience the changing seasons in this charming Baltic city.
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Tallinn in September - FAQ
What to pack to Tallinn in September?
As you prepare for your trip to Tallinn in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Tallinn, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Tallinn
UV exposure in Tallinn during September
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