Measurements:
°C
°F
CURRENT WEATHER
23:18
Lahti
58°F
N 9 mph
Feels like: 56°F
Precip: 31%
World Resorts Finland Lahti Weather

7 Day Weather Forecast

09.08
tue
DAY
60°F
N 12 mph
precip
51%
NIGHT
58°F
N 9 mph
precip
31%
09.09
wed
DAY
60°F
NE 9 mph
precip
16%
NIGHT
62°F
N 11 mph
precip
62%
09.10
thu
DAY
54°F
N 13 mph
precip
57%
NIGHT
50°F
NE 11 mph
precip
36%
09.11
fri
DAY
58°F
E 14 mph
precip
15%
NIGHT
50°F
NE 6 mph
precip
42%
09.12
sat
DAY
58°F
NE 9 mph
precip
33%
NIGHT
52°F
E 2 mph
precip
23%
09.13
sun
DAY
60°F
N 11 mph
precip
40%
NIGHT
54°F
NE 7 mph
precip
44%
09.14
mon
DAY
56°F
S 7 mph
precip
7%
NIGHT
46°F
SE 5 mph
precip
26%

Lahti Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Lahti was 15.9°F. The maximum and minimum values were 13.6°F and 17.6°F respectively.

Lahti on the Weather Map

Best Time to Visit Lahti
The most sunny months:
May 11 days
June 11 days
July 11 days
The most warm months:
July 73.5 °F
August 70.2 °F
June 69.1 °F
Warmest sea temperature:
August 69.6 °F
July 67.3 °F
September 62.7 °F
The most cold months:
January 19.9 °F
February 22.5 °F
December 26.4 °F
The most rainy months:
June 4 days
July 4 days
May 3 days
The most windy months:
December 7 mph
March 7 mph
October 7 mph
more details