Seinäjoki Weather in August
Average highs run from 22°C on August 1 to 17°C on August 31, and lows from 11°C to 7°C. Normal precipitation for the month is 58 mm over about 15 wet days.
August day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 20°C
- Average low
- 9°C
- Precipitation
- 58 mm
- Record high
- 31°CAug 1, 1963
- Record low
- -3°CAug 27, 1970
- Daylight
- 17 h 32 min to 14 h 32 min
- Cloud cover
- 65%
- Humidity
- 85%
- Dew point
- 12°C
- Wind
- 7.2 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 22°C | 11°C | 31°C 1963 | 2°C 1983 | 50% |
| Aug 2 | 22°C | 11°C | 31°C 1963 | 1°C 1976 | 50% |
| Aug 3 | 22°C | 10°C | 28°C 1967 | 2°C 2001 | 51% |
| Aug 4 | 22°C | 11°C | 30°C 1967 | 2°C 1982 | 52% |
| Aug 5 | 22°C | 10°C | 29°C 2006 | 2°C 1960 | 52% |
| Aug 6 | 22°C | 10°C | 28°C 1969 | 1°C 1976 | 52% |
| Aug 7 | 22°C | 10°C | 30°C 2023 | 0°C 1999 | 51% |
| Aug 8 | 22°C | 10°C | 29°C 2020 | 0°C 1999 | 50% |
| Aug 9 | 22°C | 10°C | 28°C 2018 | 0°C 1999 | 49% |
| Aug 10 | 21°C | 11°C | 29°C 2018 | -1°C 1975 | 49% |
| Aug 11 | 21°C | 10°C | 29°C 1992 | 1°C 1959 | 49% |
| Aug 12 | 20°C | 9°C | 28°C 1969 | 2°C 1987 | 49% |
| Aug 13 | 20°C | 10°C | 28°C 1969 | 0°C 1975 | 48% |
| Aug 14 | 20°C | 9°C | 29°C 2010 | 0°C 1964 | 49% |
| Aug 15 | 20°C | 9°C | 27°C 1959 | -1°C 1983 | 48% |
| Aug 16 | 20°C | 9°C | 30°C 2022 | -1°C 1978 | 49% |
| Aug 17 | 20°C | 10°C | 27°C 1973 | 0°C 1994 | 48% |
| Aug 18 | 20°C | 9°C | 27°C 1979 | 0°C 1984 | 48% |
| Aug 19 | 21°C | 9°C | 28°C 2002 | 0°C 1976 | 47% |
| Aug 20 | 20°C | 9°C | 29°C 2002 | 0°C 2009 | 48% |
| Aug 21 | 20°C | 9°C | 27°C 2002 | -1°C 1976 | 50% |
| Aug 22 | 20°C | 9°C | 28°C 1959 | -1°C 1999 | 50% |
| Aug 23 | 19°C | 9°C | 28°C 1959 | 0°C 1999 | 50% |
| Aug 24 | 20°C | 8°C | 28°C 2002 | 1°C 1966 | 49% |
| Aug 25 | 20°C | 8°C | 27°C 2002 | -1°C 1987 | 50% |
| Aug 26 | 19°C | 8°C | 27°C 1997 | -2°C 1984 | 49% |
| Aug 27 | 18°C | 10°C | 27°C 2019 | -3°C 1970 | 47% |
| Aug 28 | 18°C | 10°C | 27°C 2019 | -3°C 1989 | 48% |
| Aug 29 | 18°C | 8°C | 27°C 2019 | -1°C 1964 | 48% |
| Aug 30 | 17°C | 8°C | 25°C 1997 | -2°C 1989 | 47% |
| Aug 31 | 17°C | 7°C | 24°C 1996 | -3°C 1980 | 46% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+3).
- August 1
- sunrise 4:48 AM, sunset 10:20 PM
- August 31
- sunrise 6:12 AM, sunset 8:44 PM
Other months
Sources
Records: NOAA GHCN-Daily, station FIE00144407, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.