Climate averages 1991–2020
Tallinn weather
in August.
A mild, moderately wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Tallinn: daytime highs average 20.3°C and nights cool to about 13.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 77 mm of rain on roughly 13 days, which makes August a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 15 h 34 min on an average August day.
The nearest other city in this atlas is Helsinki (82 km away). In August its highs average 19.6°C, 0.7°C cooler than Tallinn, with 76 mm of rain.
Among the 2 cities listed in Estonia, Tallinn ranks 2nd of 2 for the warmest August highs and 2nd of 2 for the driest August (rainfall, lowest first). The mean August high of those 2 cities is 20.4°C; Tallinn is 0.1°C cooler than that mean.
From August to September, average highs fall by 5.0°C to 15.3°C, and monthly rainfall falls from 77 mm to 60 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tallinn climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.5°C-5.4°C | -5.4°C | 43 | 10.7 | 6.97 h |
| February | -1.9°C-6.4°C | -6.4°C | 35 | 9.3 | 9.29 h |
| March | 1.9°C-3.8°C | -3.8°C | 33 | 8.4 | 11.812 h |
| April | 8.7°C0.9°C | 0.9°C | 36 | 8.6 | 14.514 h |
| May | 14.6°C6.1°C | 6.1°C | 41 | 8.6 | 17.017 h |
| June | 18.6°C11.0°C | 11.0°C | 70 | 11.3 | 18.519 h |
| July | 21.5°C14.5°C | 14.5°C | 68 | 11.8 | 17.818 h |
| August, selected | 20.3°C13.8°C | 13.8°C | 77 | 12.9 | 15.616 h |
| September | 15.3°C9.9°C | 9.9°C | 60 | 11.7 | 12.913 h |
| October | 8.8°C4.7°C | 4.7°C | 64 | 12.5 | 10.310 h |
| November | 3.6°C0.5°C | 0.5°C | 51 | 11.0 | 7.78 h |
| December | 0.5°C-2.9°C | -2.9°C | 48 | 11.2 | 6.26 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Helsinki in AugustFinland · 82 kmHigh 19.6°C · Low 13.9°C · 76 mm rain
- Espoo in AugustFinland · 86 kmHigh 19.5°C · Low 14.1°C · 70 mm rain
- Vantaa in AugustFinland · 97 kmHigh 20.3°C · Low 13.3°C · 76 mm rain
- Tartu in AugustEstonia · 163 kmHigh 20.6°C · Low 13.5°C · 75 mm rain
- Turku in AugustFinland · 179 kmHigh 20.1°C · Low 12.9°C · 80 mm rain
- Lahti in AugustFinland · 179 kmHigh 19.6°C · Low 12.9°C · 68 mm rain
- Kouvola in AugustFinland · 192 kmHigh 19.8°C · Low 12.9°C · 66 mm rain
- Tampere in AugustFinland · 235 kmHigh 19.1°C · Low 13.2°C · 75 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tallinn) is explained once on the Tallinn year overview and on the Sources, method and limits page.