Climate averages 1991–2020
Turku weather
in August.
A mild, moderately wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Turku: daytime highs average 20.1°C and nights cool to about 12.9°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 80 mm of rain on roughly 13 days, which makes August a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 44 min on an average August day.
The nearest other city in this atlas is Pori (117 km away). In August its highs average 19.0°C, 1.0°C cooler than Turku, with 74 mm of rain.
Among the 13 cities listed in Finland, Turku ranks 2nd of 13 for the warmest August highs and 11th of 13 for the driest August (rainfall, lowest first). The mean August high of those 13 cities is 19.2°C; Turku is 0.9°C warmer than that mean.
From August to September, average highs fall by 5.1°C to 15.0°C, and monthly rainfall falls from 80 mm to 58 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
Turku 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-6.0°C | -6.0°C | 49 | 10.1 | 6.77 h |
| February | -2.0°C-7.2°C | -7.2°C | 38 | 8.5 | 9.09 h |
| March | 1.7°C-4.7°C | -4.7°C | 35 | 8.2 | 11.712 h |
| April | 8.2°C0.1°C | 0.1°C | 33 | 8.0 | 14.615 h |
| May | 14.4°C5.4°C | 5.4°C | 41 | 8.9 | 17.217 h |
| June | 18.5°C10.2°C | 10.2°C | 68 | 10.8 | 18.919 h |
| July | 21.4°C13.6°C | 13.6°C | 85 | 12.3 | 18.118 h |
| August, selected | 20.1°C12.9°C | 12.9°C | 80 | 12.5 | 15.716 h |
| September | 15.0°C8.8°C | 8.8°C | 58 | 9.5 | 13.013 h |
| October | 8.3°C3.7°C | 3.7°C | 59 | 10.4 | 10.210 h |
| November | 3.5°C0.0°C | 0.0°C | 55 | 10.9 | 7.58 h |
| December | 0.4°C-3.5°C | -3.5°C | 56 | 11.6 | 5.96 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
- Pori in AugustFinland · 117 kmHigh 19.0°C · Low 13.5°C · 74 mm rain
- Espoo in AugustFinland · 134 kmHigh 19.5°C · Low 14.1°C · 70 mm rain
- Mariehamn in AugustAland Islands · 135 kmHigh 18.3°C · Low 15.4°C · 55 mm rain
- Tampere in AugustFinland · 142 kmHigh 19.1°C · Low 13.2°C · 75 mm rain
- Helsinki in AugustFinland · 150 kmHigh 19.6°C · Low 13.9°C · 76 mm rain
- Vantaa in AugustFinland · 153 kmHigh 20.3°C · Low 13.3°C · 76 mm rain
- Tallinn in AugustEstonia · 179 kmHigh 20.3°C · Low 13.8°C · 77 mm rain
- Lahti in AugustFinland · 194 kmHigh 19.6°C · Low 12.9°C · 68 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 Turku) is explained once on the Turku year overview and on the Sources, method and limits page.