22.12
mon
mon
Day
27°F
SW 7 mph
Precip.
0%
0%
Night
23°F
SW 4 mph
Precip.
0%
0%
23.12
tue
tue
Day
19°F
NE 1 mph
Precip.
0%
0%
Night
23°F
NE 6 mph
Precip.
0%
0%
24.12
wed
wed
Day
27°F
NE 4 mph
Precip.
0%
0%
Night
28°F
E 6 mph
Precip.
0%
0%
25.12
thu
thu
Day
39°F
SE 15 mph
Precip.
0%
0%
Night
34°F
SE 6 mph
Precip.
0%
0%
26.12
fri
fri
Day
32°F
NE 4 mph
Precip.
0%
0%
Night
34°F
NE 6 mph
Precip.
0%
0%
27.12
sat
sat
Day
34°F
SE 15 mph
Precip.
0%
0%
Night
30°F
SE 8 mph
Precip.
0%
0%
28.12
sun
sun
Day
32°F
E 8 mph
Precip.
0%
0%
Night
36°F
SE 9 mph
Precip.
0%
0%
29.12
mon
mon
Day
32°F
SE 6 mph
Precip.
0%
0%
Night
30°F
SE 6 mph
Precip.
0%
0%
30.12
tue
tue
Day
27°F
N 4 mph
Precip.
0%
0%
Night
34°F
NE 6 mph
Precip.
100%
100%
31.12
wed
wed
Day
34°F
E 6 mph
Precip.
0%
0%
Night
32°F
E 2 mph
Precip.
100%
100%
01.01
thu
thu
Day
23°F
SW 12 mph
Precip.
100%
100%
Night
19°F
SW 11 mph
Precip.
100%
100%
02.01
fri
fri
Day
18°F
S 9 mph
Precip.
66%
66%
Night
12°F
NW 5 mph
Precip.
0%
0%
03.01
sat
sat
Day
10°F
S 2 mph
Precip.
0%
0%
Night
12°F
SE 2 mph
Precip.
76%
76%
sea water
temperature
temperature
| Seinajoki |
monthly
weather
weather
| Seinajoki |
current
weather
weather
| Seinajoki |
7 days
forecast
forecast
| Seinajoki |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 33.0°F. The highest and lowest sea temperatures during the month were 36.5°F and 30.7°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 30.7°F. The highest and lowest sea temperatures during the month were 33.3°F and 28.4°F.
Air temperature in Seinajoki, °F
Precipitation total in Seinajoki, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 00:44
December 22, monday
0300
30°F
SE
6 mph
6 mph
0600
30°F
S
8 mph
8 mph
0900
28°F
SW
7 mph
7 mph
1200
27°F
SW
7 mph
7 mph
1500
25°F
SW
7 mph
7 mph
1800
25°F
SW
6 mph
6 mph
2100
23°F
SW
5 mph
5 mph
December 23, tuesday
0000
23°F
SW
4 mph
4 mph
