21.12
sun
sun
Day
36°F
SE 10 mph
Precip.
0%
0%
Night
32°F
SE 6 mph
Precip.
0%
0%
22.12
mon
mon
Day
27°F
SW 9 mph
Precip.
0%
0%
Night
23°F
SW 7 mph
Precip.
0%
0%
23.12
tue
tue
Day
21°F
S 5 mph
Precip.
0%
0%
Night
21°F
E 6 mph
Precip.
0%
0%
24.12
wed
wed
Day
25°F
E 7 mph
Precip.
0%
0%
Night
25°F
E 6 mph
Precip.
0%
0%
25.12
thu
thu
Day
36°F
E 14 mph
Precip.
60%
60%
Night
34°F
SE 9 mph
Precip.
0%
0%
26.12
fri
fri
Day
37°F
SW 9 mph
Precip.
0%
0%
Night
28°F
E 2 mph
Precip.
0%
0%
27.12
sat
sat
Day
36°F
SE 13 mph
Precip.
0%
0%
Night
30°F
S 14 mph
Precip.
0%
0%
28.12
sun
sun
Day
27°F
E 6 mph
Precip.
0%
0%
Night
32°F
SE 7 mph
Precip.
0%
0%
29.12
mon
mon
Day
30°F
SE 7 mph
Precip.
0%
0%
Night
28°F
SE 9 mph
Precip.
0%
0%
30.12
tue
tue
Day
25°F
S 6 mph
Precip.
0%
0%
Night
23°F
N 7 mph
Precip.
100%
100%
31.12
wed
wed
Day
30°F
NE 6 mph
Precip.
100%
100%
Night
32°F
NE 3 mph
Precip.
100%
100%
01.01
thu
thu
Day
32°F
W 5 mph
Precip.
100%
100%
Night
25°F
SW 6 mph
Precip.
100%
100%
02.01
fri
fri
Day
19°F
SW 6 mph
Precip.
100%
100%
Night
14°F
NW 4 mph
Precip.
80%
80%
03.01
sat
sat
Day
14°F
NW 2 mph
Precip.
80%
80%
Night
14°F
SE 3 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 37.3°F. The highest and lowest sea temperatures during the month were 39.6°F and 35.6°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: 13:21
December 21, sunday
1500
36°F
SE
9 mph
9 mph
1800
34°F
SE
7 mph
7 mph
2100
32°F
SE
5 mph
5 mph
December 22, monday
0000
32°F
SE
6 mph
6 mph
0300
32°F
SE
5 mph
5 mph
0600
32°F
S
7 mph
7 mph
0900
32°F
SW
9 mph
9 mph
1200
27°F
SW
9 mph
9 mph
