16.09
wed
wed
Day
55°F
N 11 mph
Precip.
20%
20%
Night
59°F
N 12 mph
Precip.
23%
23%
17.09
thu
thu
Day
59°F
NE 14 mph
Precip.
32%
32%
Night
50°F
NE 6 mph
Precip.
39%
39%
18.09
fri
fri
Day
55°F
NE 9 mph
Precip.
33%
33%
Night
55°F
N 11 mph
Precip.
30%
30%
19.09
sat
sat
Day
55°F
NE 14 mph
Precip.
42%
42%
Night
52°F
NE 11 mph
Precip.
12%
12%
20.09
sun
sun
Day
55°F
N 14 mph
Precip.
74%
74%
Night
50°F
N 5 mph
Precip.
38%
38%
21.09
mon
mon
Day
52°F
W 5 mph
Precip.
80%
80%
Night
48°F
W 5 mph
Precip.
21%
21%
22.09
tue
tue
Day
54°F
W 7 mph
Precip.
24%
24%
Night
55°F
W 11 mph
Precip.
58%
58%
23.09
wed
wed
Day
61°F
SW 11 mph
Precip.
25%
25%
Night
48°F
NW 8 mph
Precip.
27%
27%
24.09
thu
thu
Day
54°F
N 4 mph
Precip.
22%
22%
Night
48°F
N 6 mph
Precip.
38%
38%
25.09
fri
fri
Day
48°F
SE 6 mph
Precip.
45%
45%
Night
45°F
S 9 mph
Precip.
34%
34%
26.09
sat
sat
Day
50°F
SW 11 mph
Precip.
29%
29%
Night
46°F
SW 6 mph
Precip.
33%
33%
27.09
sun
sun
Day
50°F
W 6 mph
Precip.
12%
12%
Night
41°F
W 5 mph
Precip.
14%
14%
28.09
mon
mon
Day
52°F
W 10 mph
Precip.
5%
5%
Night
45°F
W 7 mph
Precip.
15%
15%
29.09
tue
tue
Day
52°F
NW 9 mph
Precip.
5%
5%
Night
45°F
W 6 mph
Precip.
30%
30%
sea water
temperature
temperature
| Lappeenranta |
monthly
weather
weather
| Lappeenranta |
current
weather
weather
| Lappeenranta |
7 days
forecast
forecast
| Lappeenranta |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 60.7°F. The highest and lowest sea temperatures during the month were 62.8°F and 58.6°F.
Air temperature in Lappeenranta, °F
Precipitation total in Lappeenranta, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Lappeenranta
Lappeenranta on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Lappeenranta
Local time: 18:52
September 16, wednesday
2100
59°F
N
11 mph
11 mph
September 17, thursday
0000
59°F
N
12 mph
12 mph
0300
57°F
N
13 mph
13 mph
0600
55°F
NE
9 mph
9 mph
0900
55°F
NE
11 mph
11 mph
1200
59°F
NE
14 mph
14 mph
1500
59°F
NE
12 mph
12 mph
1800
57°F
NE
11 mph
11 mph
