15.09
tue
tue
Day
57°F
N 4 mph
Precip.
8%
8%
Night
55°F
NW 6 mph
Precip.
24%
24%
16.09
wed
wed
Day
59°F
N 12 mph
Precip.
22%
22%
Night
57°F
NE 14 mph
Precip.
51%
51%
17.09
thu
thu
Day
59°F
E 13 mph
Precip.
17%
17%
Night
52°F
NE 6 mph
Precip.
27%
27%
18.09
fri
fri
Day
55°F
NE 9 mph
Precip.
61%
61%
Night
55°F
N 15 mph
Precip.
79%
79%
19.09
sat
sat
Day
59°F
NE 12 mph
Precip.
19%
19%
Night
55°F
NE 9 mph
Precip.
27%
27%
20.09
sun
sun
Day
57°F
NE 12 mph
Precip.
44%
44%
Night
52°F
E 17 mph
Precip.
67%
67%
21.09
mon
mon
Day
55°F
SE 12 mph
Precip.
16%
16%
Night
46°F
S 11 mph
Precip.
9%
9%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 59.5°F. The highest and lowest sea temperatures during the month were 63.1°F and 54.9°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: 04:47
September 15, tuesday
0600
46°F
S
3 mph
3 mph
0900
50°F
SW
1 mph
1 mph
1200
57°F
N
4 mph
4 mph
1500
59°F
N
6 mph
6 mph
1800
55°F
N
4 mph
4 mph
2100
54°F
N
5 mph
5 mph
September 16, wednesday
0000
55°F
NW
6 mph
6 mph
0300
55°F
N
7 mph
7 mph
