Climate averages 1991–2020
Lappeenranta 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 Lappeenranta: daytime highs average 19.6°C and nights cool to about 13.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 75 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 50 min on an average August day.
The nearest other city in this atlas is Vyborg (50 km away). In August its highs average 19.6°C, about as warm as Lappeenranta, with 71 mm of rain.
Among the 13 cities listed in Finland, Lappeenranta ranks joint 4th of 13 for the warmest August highs and joint 7th of 13 for the driest August (rainfall, lowest first). The mean August high of those 13 cities is 19.2°C; Lappeenranta is 0.4°C warmer than that mean.
From August to September, average highs fall by 5.7°C to 13.9°C, and monthly rainfall falls from 75 mm to 56 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
Lappeenranta climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -4.5°C-8.4°C | -8.4°C | 42 | 10.3 | 6.57 h |
| February | -4.8°C-8.8°C | -8.8°C | 38 | 9.1 | 8.99 h |
| March | -0.8°C-5.5°C | -5.5°C | 36 | 9.0 | 11.712 h |
| April | 5.6°C-1.2°C | -1.2°C | 33 | 8.4 | 14.615 h |
| May | 14.0°C5.2°C | 5.2°C | 46 | 9.2 | 17.417 h |
| June | 18.8°C11.0°C | 11.0°C | 66 | 11.9 | 19.119 h |
| July | 21.5°C14.2°C | 14.2°C | 73 | 11.9 | 18.318 h |
| August, selected | 19.6°C13.1°C | 13.1°C | 75 | 12.4 | 15.816 h |
| September | 13.9°C8.6°C | 8.6°C | 56 | 10.7 | 13.013 h |
| October | 6.7°C2.9°C | 2.9°C | 57 | 11.2 | 10.110 h |
| November | 1.3°C-1.6°C | -1.6°C | 54 | 11.2 | 7.47 h |
| December | -2.0°C-5.5°C | -5.5°C | 52 | 11.3 | 5.76 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
- Vyborg in AugustRussia · 50 kmHigh 19.6°C · Low 13.6°C · 71 mm rain
- Kouvola in AugustFinland · 83 kmHigh 19.8°C · Low 12.9°C · 66 mm rain
- Lahti in AugustFinland · 136 kmHigh 19.6°C · Low 12.9°C · 68 mm rain
- Peterhof in AugustRussia · 161 kmHigh 18.9°C · Low 13.5°C · 74 mm rain
- Saint Petersburg in AugustRussia · 170 kmHigh 19.7°C · Low 13.5°C · 70 mm rain
- Jyväskylä in AugustFinland · 185 kmHigh 18.8°C · Low 12.7°C · 72 mm rain
- Joensuu in AugustFinland · 190 kmHigh 18.1°C · Low 13.6°C · 82 mm rain
- Vantaa in AugustFinland · 191 kmHigh 20.3°C · Low 13.3°C · 76 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 Lappeenranta) is explained once on the Lappeenranta year overview and on the Sources, method and limits page.