31.12
wed
wed
Day
18°F
S 8 mph
Precip.
0%
0%
Night
12°F
SE 6 mph
Precip.
0%
0%
01.01
thu
thu
Day
14°F
NW 4 mph
Precip.
0%
0%
Night
23°F
NW 14 mph
Precip.
100%
100%
02.01
fri
fri
Day
21°F
W 11 mph
Precip.
100%
100%
Night
18°F
W 9 mph
Precip.
100%
100%
03.01
sat
sat
Day
23°F
SW 5 mph
Precip.
78%
78%
Night
18°F
S 3 mph
Precip.
0%
0%
04.01
sun
sun
Day
21°F
S 3 mph
Precip.
63%
63%
Night
18°F
S 4 mph
Precip.
84%
84%
05.01
mon
mon
Day
14°F
SE 5 mph
Precip.
49%
49%
Night
1°F
NE 2 mph
Precip.
0%
0%
06.01
tue
tue
Day
16°F
NW 5 mph
Precip.
0%
0%
Night
23°F
NW 12 mph
Precip.
100%
100%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 36.4°F. The highest and lowest sea temperatures during the month were 39.6°F and 34.0°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 33.1°F. The highest and lowest sea temperatures during the month were 34.0°F and 32.4°F.
Air temperature in Lahti, °F
Precipitation total in Lahti, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Lahti
Lahti on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Lahti
Local time: 03:41
December 31, wednesday
0600
16°F
S
9 mph
9 mph
0900
16°F
S
8 mph
8 mph
1200
18°F
S
8 mph
8 mph
1500
16°F
SE
7 mph
7 mph
1800
14°F
SE
7 mph
7 mph
2100
12°F
SE
5 mph
5 mph
January 01, thursday
0000
12°F
SE
6 mph
6 mph
0300
10°F
E
4 mph
4 mph
