16.09
wed
wed
Day
57°F
N 12 mph
Precip.
35%
35%
Night
57°F
NE 9 mph
Precip.
59%
59%
17.09
thu
thu
Day
59°F
NE 14 mph
Precip.
23%
23%
Night
52°F
E 5 mph
Precip.
39%
39%
18.09
fri
fri
Day
55°F
NE 13 mph
Precip.
68%
68%
Night
55°F
NE 13 mph
Precip.
46%
46%
19.09
sat
sat
Day
59°F
NE 14 mph
Precip.
20%
20%
Night
57°F
NE 17 mph
Precip.
45%
45%
20.09
sun
sun
Day
59°F
NE 14 mph
Precip.
20%
20%
Night
52°F
NE 3 mph
Precip.
28%
28%
21.09
mon
mon
Day
55°F
S 8 mph
Precip.
28%
28%
Night
46°F
SW 7 mph
Precip.
34%
34%
22.09
tue
tue
Day
54°F
SW 12 mph
Precip.
19%
19%
Night
50°F
E 6 mph
Precip.
67%
67%
23.09
wed
wed
Day
54°F
S 9 mph
Precip.
16%
16%
Night
52°F
W 12 mph
Precip.
31%
31%
24.09
thu
thu
Day
55°F
NW 5 mph
Precip.
21%
21%
Night
48°F
E 6 mph
Precip.
31%
31%
25.09
fri
fri
Day
48°F
SE 11 mph
Precip.
26%
26%
Night
45°F
S 10 mph
Precip.
32%
32%
26.09
sat
sat
Day
48°F
S 8 mph
Precip.
42%
42%
Night
46°F
SW 7 mph
Precip.
25%
25%
27.09
sun
sun
Day
50°F
W 9 mph
Precip.
23%
23%
Night
52°F
W 11 mph
Precip.
21%
21%
28.09
mon
mon
Day
55°F
W 16 mph
Precip.
12%
12%
Night
52°F
W 14 mph
Precip.
14%
14%
29.09
tue
tue
Day
52°F
W 14 mph
Precip.
22%
22%
Night
52°F
W 7 mph
Precip.
27%
27%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 59.3°F. The highest and lowest sea temperatures during the month were 60.6°F and 57.0°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: 21:13
September 17, thursday
0000
57°F
NE
9 mph
9 mph
0300
55°F
NE
9 mph
9 mph
0600
55°F
NE
11 mph
11 mph
0900
55°F
NE
10 mph
10 mph
1200
59°F
NE
14 mph
14 mph
1500
59°F
NE
14 mph
14 mph
1800
57°F
E
11 mph
11 mph
2100
52°F
E
6 mph
6 mph
