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Tallinn, Estonia climate
Cfb Oceanic / temperate
Tallinn has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 23°C, while the coldest is February averaging around −3°C at night. Around 736 mm of precipitation falls each year, peaking in October (89 mm) and easing off in April (31 mm). At latitude 59°N, day length swings from 5.7 hours in midwinter to 18.2 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsTallinn climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 1 | −1 | 3 | 9 | 15 | 20 | 23 | 21 | 17 | 11 | 5 | 2 |
| Avg temp (°C) | −2 | −2 | 1 | 5 | 12 | 14 | 20 | 20 | 15 | 10 | 3 | 0 |
| Avg low (°C) | −5 | −3 | 0 | 0 | 9 | 9 | 18 | 18 | 14 | 9 | 0 | −2 |
| Precipitation (mm) | 64 | 66 | 35 | 31 | 36 | 63 | 72 | 86 | 66 | 89 | 67 | 61 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 1 | −1 | 3 | 9 | 15 | 20 |
| Avg temp (°C) | −2 | −2 | 1 | 5 | 12 | 14 |
| Avg low (°C) | −5 | −3 | 0 | 0 | 9 | 9 |
| Precipitation (mm) | 64 | 66 | 35 | 31 | 36 | 63 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 21 | 17 | 11 | 5 | 2 |
| Avg temp (°C) | 20 | 20 | 15 | 10 | 3 | 0 |
| Avg low (°C) | 18 | 18 | 14 | 9 | 0 | −2 |
| Precipitation (mm) | 72 | 86 | 66 | 89 | 67 | 61 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 13 | 11 | 9 | 7 | 9 | 9 | 10 | 10 | 13 | 14 | 16 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — | 0.3 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 12 | 11 | 12 | 9 | 2 | 0.0 | — | — | 0.4 | 3 | 8 | 12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 13 | 11 | 9 | 7 | 9 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 12 | 11 | 12 | 9 | 2 | 0.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 10 | 10 | 13 | 14 | 16 |
| Days with high ≥ 32°C (days) | 0.3 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.4 | 3 | 8 | 12 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 76 | 68 | 65 | 57 | 61 | 59 | 61 | 68 | 77 | 82 | 83 |
| Clear days (≤ 30% cloud) | 0.7 | 1 | 3 | 4 | 7 | 5 | 6 | 5 | 3 | 2 | 0.7 | 0.7 |
| Partly cloudy days (30–70%) | 7 | 8 | 12 | 11 | 12 | 12 | 12 | 12 | 10 | 8 | 6 | 6 |
| Cloudy days (≥ 70%) | 23 | 19 | 16 | 15 | 12 | 13 | 13 | 14 | 16 | 21 | 24 | 24 |
| Relative humidity (%) | 92 | 93 | 90 | 86 | 81 | 80 | 79 | 78 | 81 | 86 | 90 | 91 |
| Wind speed (m/s) | 6.2 | 5.7 | 5.2 | 4.5 | 4.0 | 4.2 | 4.2 | 4.6 | 5.4 | 5.9 | 6.3 | 6.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 76 | 68 | 65 | 57 | 61 |
| Clear days (≤ 30% cloud) | 0.7 | 1 | 3 | 4 | 7 | 5 |
| Partly cloudy days (30–70%) | 7 | 8 | 12 | 11 | 12 | 12 |
| Cloudy days (≥ 70%) | 23 | 19 | 16 | 15 | 12 | 13 |
| Relative humidity (%) | 92 | 93 | 90 | 86 | 81 | 80 |
| Wind speed (m/s) | 6.2 | 5.7 | 5.2 | 4.5 | 4.0 | 4.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 61 | 68 | 77 | 82 | 83 |
| Clear days (≤ 30% cloud) | 6 | 5 | 3 | 2 | 0.7 | 0.7 |
| Partly cloudy days (30–70%) | 12 | 12 | 10 | 8 | 6 | 6 |
| Cloudy days (≥ 70%) | 13 | 14 | 16 | 21 | 24 | 24 |
| Relative humidity (%) | 79 | 78 | 81 | 86 | 90 | 91 |
| Wind speed (m/s) | 4.2 | 4.6 | 5.4 | 5.9 | 6.3 | 6.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 14 years of daily observations at Tallinn, a weather station, about 11 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.