18.05
mon
mon
Day
63°F
SW 4 mph
Precip.
0%
0%
Night
52°F
S 6 mph
Precip.
100%
100%
19.05
tue
tue
Day
72°F
NW 9 mph
Precip.
0%
0%
Night
59°F
NW 6 mph
Precip.
0%
0%
20.05
wed
wed
Day
54°F
NE 7 mph
Precip.
85%
85%
Night
48°F
NE 4 mph
Precip.
0%
0%
21.05
thu
thu
Day
64°F
NE 8 mph
Precip.
0%
0%
Night
50°F
NE 6 mph
Precip.
0%
0%
22.05
fri
fri
Day
64°F
NE 10 mph
Precip.
100%
100%
Night
52°F
SE 10 mph
Precip.
0%
0%
23.05
sat
sat
Day
64°F
SE 9 mph
Precip.
0%
0%
Night
57°F
NE 6 mph
Precip.
0%
0%
24.05
sun
sun
Day
59°F
SE 13 mph
Precip.
66%
66%
Night
52°F
E 9 mph
Precip.
0%
0%
25.05
mon
mon
Day
50°F
S 13 mph
Precip.
0%
0%
Night
45°F
S 5 mph
Precip.
0%
0%
26.05
tue
tue
Day
59°F
S 6 mph
Precip.
0%
0%
Night
46°F
N 3 mph
Precip.
0%
0%
27.05
wed
wed
Day
64°F
N 6 mph
Precip.
0%
0%
Night
50°F
N 6 mph
Precip.
0%
0%
28.05
thu
thu
Day
52°F
N 6 mph
Precip.
64%
64%
Night
46°F
E 7 mph
Precip.
72%
72%
29.05
fri
fri
Day
55°F
NE 6 mph
Precip.
83%
83%
Night
48°F
NE 4 mph
Precip.
100%
100%
30.05
sat
sat
Day
61°F
N 7 mph
Precip.
0%
0%
Night
50°F
W 5 mph
Precip.
0%
0%
31.05
sun
sun
Day
52°F
N 9 mph
Precip.
100%
100%
Night
50°F
N 4 mph
Precip.
65%
65%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 46.0°F. The highest and lowest sea temperatures during the month were 50.4°F and 41.0°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 57.4°F. The highest and lowest sea temperatures during the month were 61.0°F and 54.3°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: 15:02
May 18, monday
1800
61°F
SW
6 mph
6 mph
2100
55°F
SW
5 mph
5 mph
May 19, tuesday
0000
52°F
S
6 mph
6 mph
0300
50°F
S
9 mph
9 mph
0600
50°F
SW
9 mph
9 mph
0900
57°F
W
9 mph
9 mph
1200
72°F
NW
9 mph
9 mph
1500
77°F
NW
11 mph
11 mph
