Temperature
Cool by day, brisk at night.
Cool days.
Cool by day, brisk at night.
Several rainy days. About 11 wet days this month.
Sunshine is limited, with cloud often dominating.
In September, afternoons feel about 53° and nights feel near 46°.
Mostly cloudy skies this month.
Breezy conditions are typical in September. More a comfort consideration than a planning concern.
September late afternoons are around 59°F, easing to about 56°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 29 | 22 | 1.8 | 12 | 0.8 | 88 |
| Feb | 29 | 21 | 1.4 | 10 | 2.0 | 86 |
| Mar | 35 | 25 | 1.2 | 8 | 4.1 | 80 |
| Apr | 46 | 34 | 1.4 | 9 | 6.2 | 74 |
| May | 56 | 42 | 1.6 | 9 | 8.9 | 70 |
| Jun | 64 | 51 | 2.7 | 11 | 10.1 | 74 |
| Jul | 70 | 58 | 3.0 | 13 | 9.0 | 76 |
| Aug | 68 | 56 | 3.1 | 13 | 7.4 | 78 |
| Sep | 60 | 49 | 2.3 | 11 | 4.7 | 81 |
| Oct | 49 | 41 | 2.6 | 13 | 3.0 | 84 |
| Nov | 40 | 34 | 2.1 | 12 | 1.0 | 88 |
| Dec | 34 | 28 | 2.0 | 12 | 0.6 | 88 |
Similar climates
Want a side-by-side climate view? Compare Tallinn with Oslo.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology