Climate averages 1991–2020
Espoo 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 Espoo: daytime highs average 19.5°C and nights cool to about 14.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 70 mm of rain on roughly 12 days, which makes August a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 15 h 41 min on an average August day.
The nearest other city in this atlas is Helsinki (16 km away). In August its highs average 19.6°C, about as warm as Espoo, with 76 mm of rain.
Among the 13 cities listed in Finland, Espoo ranks 7th of 13 for the warmest August highs and 3rd of 13 for the driest August (rainfall, lowest first). The mean August high of those 13 cities is 19.2°C; Espoo is 0.3°C warmer than that mean.
From August to September, average highs fall by 4.9°C to 14.5°C, and monthly rainfall falls from 70 mm to 55 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
Espoo climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.9°C-5.8°C | -5.8°C | 50 | 11.1 | 6.77 h |
| February | -2.7°C-6.9°C | -6.9°C | 41 | 9.0 | 9.19 h |
| March | 0.7°C-4.4°C | -4.4°C | 37 | 8.2 | 11.712 h |
| April | 6.7°C0.5°C | 0.5°C | 37 | 8.8 | 14.515 h |
| May | 12.9°C6.2°C | 6.2°C | 43 | 8.7 | 17.217 h |
| June | 17.1°C11.0°C | 11.0°C | 66 | 11.4 | 18.819 h |
| July | 20.6°C14.7°C | 14.7°C | 69 | 11.2 | 18.118 h |
| August, selected | 19.5°C14.1°C | 14.1°C | 70 | 12.2 | 15.716 h |
| September | 14.5°C10.0°C | 10.0°C | 55 | 10.1 | 13.013 h |
| October | 8.2°C4.7°C | 4.7°C | 59 | 10.8 | 10.210 h |
| November | 3.4°C0.5°C | 0.5°C | 59 | 11.5 | 7.68 h |
| December | 0.3°C-3.0°C | -3.0°C | 57 | 12.4 | 6.06 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 · 16 kmHigh 19.6°C · Low 13.9°C · 76 mm rain
- Vantaa in AugustFinland · 24 kmHigh 20.3°C · Low 13.3°C · 76 mm rain
- Tallinn in AugustEstonia · 86 kmHigh 20.3°C · Low 13.8°C · 77 mm rain
- Lahti in AugustFinland · 103 kmHigh 19.6°C · Low 12.9°C · 68 mm rain
- Kouvola in AugustFinland · 134 kmHigh 19.8°C · Low 12.9°C · 66 mm rain
- Turku in AugustFinland · 134 kmHigh 20.1°C · Low 12.9°C · 80 mm rain
- Tampere in AugustFinland · 151 kmHigh 19.1°C · Low 13.2°C · 75 mm rain
- Pori in AugustFinland · 210 kmHigh 19.0°C · Low 13.5°C · 74 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 Espoo) is explained once on the Espoo year overview and on the Sources, method and limits page.