Seinäjoki Weather in May
Average highs run from 12°C on May 1 to 18°C on May 31, and lows from 0°C to 5°C. Normal precipitation for the month is 38 mm over about 11 wet days.
May day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 15°C
- Average low
- 3°C
- Precipitation
- 38 mm
- Record high
- 29°CMay 24, 2014
- Record low
- -8°CMay 1, 1976
- Daylight
- 16 h 32 min to 19 h 19 min
- Cloud cover
- 62%
- Humidity
- 78%
- Dew point
- 4°C
- Wind
- 7.9 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 |
|---|---|---|---|---|---|
| May 1 | 12°C | 0°C | 23°C 2008 | -8°C 1976 | 32% |
| May 2 | 12°C | 1°C | 24°C 2009 | -7°C 1976 | 32% |
| May 3 | 12°C | 2°C | 23°C 2008 | -8°C 1999 | 33% |
| May 4 | 12°C | 1°C | 21°C 1972 | -6°C 1974 | 32% |
| May 5 | 13°C | 1°C | 22°C 2004 | -6°C 1974 | 32% |
| May 6 | 14°C | 2°C | 26°C 2004 | -6°C 1974 | 32% |
| May 7 | 15°C | 2°C | 25°C 2006 | -6°C 1991 | 32% |
| May 8 | 15°C | 2°C | 25°C 2004 | -5°C 1978 | 33% |
| May 9 | 14°C | 3°C | 24°C 2004 | -5°C 1972 | 34% |
| May 10 | 14°C | 2°C | 25°C 1975 | -4°C 1972 | 34% |
| May 11 | 14°C | 2°C | 25°C 2018 | -5°C 1972 | 34% |
| May 12 | 14°C | 2°C | 27°C 2021 | -5°C 2017 | 34% |
| May 13 | 14°C | 2°C | 28°C 2021 | -4°C 1980 | 34% |
| May 14 | 14°C | 3°C | 28°C 2010 | -4°C 2004 | 34% |
| May 15 | 14°C | 3°C | 28°C 2010 | -4°C 1971 | 34% |
| May 16 | 15°C | 3°C | 29°C 2010 | -4°C 1965 | 35% |
| May 17 | 15°C | 3°C | 27°C 2024 | -4°C 2006 | 36% |
| May 18 | 16°C | 4°C | 25°C 2010 | -6°C 1994 | 36% |
| May 19 | 16°C | 4°C | 29°C 2014 | -4°C 1959 | 37% |
| May 20 | 17°C | 4°C | 27°C 2010 | -6°C 1980 | 38% |
| May 21 | 17°C | 4°C | 26°C 2018 | -5°C 1959 | 38% |
| May 22 | 18°C | 4°C | 26°C 1981 | -6°C 1960 | 38% |
| May 23 | 17°C | 6°C | 28°C 2014 | -5°C 1959 | 38% |
| May 24 | 16°C | 4°C | 29°C 2014 | -5°C 1997 | 38% |
| May 25 | 16°C | 4°C | 28°C 1979 | -3°C 1987 | 38% |
| May 26 | 16°C | 5°C | 26°C 2003 | -3°C 1973 | 37% |
| May 27 | 16°C | 5°C | 27°C 2024 | -2°C 2001 | 37% |
| May 28 | 16°C | 5°C | 27°C 2024 | -4°C 1993 | 38% |
| May 29 | 16°C | 5°C | 28°C 2024 | -2°C 1975 | 38% |
| May 30 | 17°C | 5°C | 29°C 1971 | -5°C 1975 | 39% |
| May 31 | 18°C | 5°C | 29°C 1971 | -2°C 2001 | 40% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+3).
- May 1
- sunrise 5:11 AM, sunset 9:43 PM
- May 31
- sunrise 3:48 AM, sunset 11:07 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.