Weather in Seinajoki: May
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Average day temperature: | 56.1°F |
| Average night temperature: | 42.5°F | |
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Sea water temperature: | 40.7°F |
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Number of sunny days: | 11 days |
| Day length: | 16.5 - 19.3 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.5 in. | |
| more information | ||
14 days
forecast
forecast
| Seinajoki |
sea water
temperature
temperature
| Seinajoki |
Air temperature in May, °F
Show year:
2025
2024
2023
The highest day temperature during May of 2025 was 56°F. At the same time the lowest night temperature was 32°F. Daily and nightly averages during May were 46.8°F and 40.6°F.
Sea water temperature in Seinajoki in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 45.2°F. The highest and lowest sea temperatures during the month were 49.3°F and 39.2°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in May is almost equal.
Precipitation total in May, in.
Precipitation total value in Seinajoki in May is 1.4 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 7.1 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 9.9.
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 09:38
December 05, friday
1200
39°F
N
4 mph
4 mph
1500
37°F
NW
2 mph
2 mph
1800
39°F
NW
2 mph
2 mph
2100
39°F
N
3 mph
3 mph
December 06, saturday
0000
39°F
N
4 mph
4 mph
0300
37°F
W
4 mph
4 mph
0600
37°F
W
6 mph
6 mph
0900
37°F
W
7 mph
7 mph
