Estonia Tallinn Weather in September — Climate Guide
September in Tallinn is high
Tallinn Weather in September — Quick Answer
As of 2026- Avg temp
- 16° / 8°
- Rainfall
- 60mm · 11 days
- Crowds
- Moderate
As of 2026, Tallinn in September averages a high of 16°C and low of 8°C with 60mm of rain over about 11 days. Early autumn. A jacket and knitwear.
September is high for Tallinn.
The best value.
Travel score
Tallinn September Weather Stats
Avg High
16°C
Avg Low
8°C
Rainy Days
11
60mm total
Sunshine
6h
Daily avg
Humidity
80%
comfortable
UV Index
3
Moderate
Wind
12 km/h
Gusts 30
Sea Temp
14°C
too cold to swim (chilly)
Crowds
Moderate
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
6 μg/m³
PM10
12 μg/m³
Status
very good
Feels-Like Temperature & Wind
Feels like
Daytime
15°C
Nighttime
7°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 30 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Pleasant weather (16/8°C)
- Good value
- Foliage starts
Cons
- 11 rainy days a month
September Events & Festivals
- Autumn begins, foliage starts
Tallinn in September — Full Picture
The best value.
What to Wear & What to Pack
Early autumn. A jacket and knitwear.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
8°C
0.7°C
7.7/mo
Summer (Jun·Jul·Aug)
20.7°C
11.3°C
10.7/mo
Autumn (Sep·Oct·Nov)
Current9.7°C
4°C
11.7/mo
Winter (Dec·Jan·Feb)
-1.7°C
-6.3°C
10.3/mo
Tallinn Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| -2° | -7° | 11d·50mm | 1h | 85% | 0 | Quiet | Low season | |
| -2° | -8° | 9d·35mm | 3h | 82% | 1 | Quiet | Low season | |
| 2° | -4° | 7d·30mm | 4h | 78% | 1 | Quiet | Shoulder | |
| 8° | 1° | 8d·35mm | 7h | 70% | 3 | Moderate | Shoulder | |
| 14° | 5° | 8d·35mm | 9h | 65% | 4 | Busy | Peak | |
| June (white nights begin) (Best) | 19° | 9° | 9d·50mm | 10h | 65% | 6 | Very busy | Peak |
| July (best of summer) (Best) | 22° | 13° | 11d·75mm | 9h | 70% | 6 | Very busy | Peak |
| August (end of summer) (Best) | 21° | 12° | 12d·85mm | 8h | 75% | 5 | Very busy | Peak |
| 16° | 8° | 11d·60mm | 6h | 80% | 3 | Moderate | Shoulder | |
| 9° | 4° | 12d·75mm | 3h | 85% | 1 | Quiet | Low season | |
| 4° | 0° | 12d·70mm | 1h | 88% | 0 | Quiet | Low season | |
| -1° | -4° | 11d·50mm | 1h | 88% | 0 | Busy | Peak |
View Other Months
Tallinn September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Tallinn?
Tallinn in September is high. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Tallinn in September?
Tallinn September averages a high of 16°C and a low of 8°C.
Does it rain much in Tallinn in September?
Tallinn September averages 60mm of rainfall over about 11 rainy days.
What should I wear in Tallinn in September?
Early autumn. A jacket and knitwear.
What time are sunrise and sunset in Tallinn in September?
Tallinn September sunrise is 06:35 and sunset is 19:25, with 12h 50min of daylight.
What's the air quality like in Tallinn in September?
Tallinn September air quality (AQI) averages 25, rated Good. PM2.5 averages 6μg/m³.
What activities are recommended in Tallinn in September?
In September, Tallinn is great for Old Town, Toompea Hill, Telliskivi.
Is September peak season in Tallinn?
Tallinn September crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Tallinn
View Other Months
Planning a September trip to Tallinn?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.