17.12
wed
wed
Day
41°F
N 10 mph
Precip.
0%
0%
Night
39°F
E 12 mph
Precip.
0%
0%
18.12
thu
thu
Day
36°F
NE 4 mph
Precip.
0%
0%
Night
41°F
NE 12 mph
Precip.
87%
87%
19.12
fri
fri
Day
41°F
NE 11 mph
Precip.
70%
70%
Night
41°F
NE 14 mph
Precip.
100%
100%
20.12
sat
sat
Day
41°F
NE 13 mph
Precip.
89%
89%
Night
37°F
E 10 mph
Precip.
0%
0%
21.12
sun
sun
Day
39°F
E 8 mph
Precip.
0%
0%
Night
34°F
E 6 mph
Precip.
0%
0%
22.12
mon
mon
Day
34°F
E 4 mph
Precip.
0%
0%
Night
36°F
N 6 mph
Precip.
100%
100%
23.12
tue
tue
Day
34°F
SW 11 mph
Precip.
100%
100%
Night
25°F
S 11 mph
Precip.
76%
76%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 40.2°F. The highest and lowest sea temperatures during the month were 42.1°F and 36.5°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 35.1°F. The highest and lowest sea temperatures during the month were 37.0°F and 33.6°F.
Air temperature in Vantaa, °F
Precipitation total in Vantaa, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Vantaa
Vantaa on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Vantaa
Local time: 23:33
December 18, thursday
0000
39°F
E
12 mph
12 mph
0300
37°F
E
11 mph
11 mph
0600
36°F
E
6 mph
6 mph
0900
34°F
E
5 mph
5 mph
1200
36°F
NE
4 mph
4 mph
1500
36°F
NE
5 mph
5 mph
1800
37°F
N
7 mph
7 mph
2100
37°F
NE
9 mph
9 mph
