Annual mean 6°C · wettest around February · prevailing wind SW
Warmest
22.8 °C
Coldest
-6.9 °C
Wettest
62%
Windiest
3.0 m/s
Prevailing
SW
2.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Lahti over the whole year is 6°C. July is the hottest month, with highs of about 21°C; January is the coldest, with lows of about -6°C. Lahti has no sharply defined rainy season: the chance of rain on a given day runs from 24% in April, the driest month, to 46% in February, the wettest. Winds in Lahti are highest in November, averaging 2.4 m/s (9 km/h), and lightest in July, at 1.9 m/s (7 km/h). The prevailing wind is from the SW. The clearest skies in Lahti come in May, when the sky is typically 40% covered; December is the cloudiest month, at 87%.
Month by month Lahti climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-5°C
-6°C
-10°C
41%
79%
2.3 m/s
0
0
0
February
-3°C
-5°C
-8°C
46%
76%
2.3 m/s
0
0
0
March
1°C
-4°C
-4°C
36%
61%
2.3 m/s
0
0
1
April
7°C
0°C
3°C
24%
54%
2.2 m/s
2
0
23
May
15°C
7°C
12°C
29%
40%
2.2 m/s
34
2
65
June
18°C
12°C
15°C
32%
49%
2.3 m/s
51
4
76
July
21°C
15°C
19°C
30%
45%
1.9 m/s
71
19
67
August
19°C
13°C
18°C
26%
54%
2.1 m/s
71
6
80
September
14°C
9°C
12°C
35%
59%
2.0 m/s
29
0
76
October
7°C
4°C
3°C
38%
73%
2.2 m/s
1
0
28
November
2°C
1°C
-2°C
34%
84%
2.4 m/s
0
0
6
December
-2°C
-2°C
-6°C
30%
87%
2.3 m/s
0
0
0
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Lahti weather by season
Year round, Lahti has days of about -5°C at their warmest in January, its coolest month, and 21°C in July, its warmest; the coolest hours of the day run from -6°C to 15°C through the year, and the average temperature over the year is 6°C around the clock. Rain is most likely around February and least likely around April. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Lahti weather in winterDecember to February
High -3°CLow -4°CRain 39%
Winter in Lahti has typical daily highs of about -3°C and lows of about -4°C, with a 39% chance of rain on a given day.
Lahti weather in springMarch to May
High 8°CLow 1°CRain 30%
Spring in Lahti has typical daily highs of about 8°C and lows of about 1°C, with a 30% chance of rain on a given day.
Lahti weather in summerJune to August
High 19°CLow 13°CRain 29%
Summer in Lahti has typical daily highs of about 19°C and lows of about 13°C, with a 29% chance of rain on a given day.
Lahti weather in autumnSeptember to November
High 7°CLow 4°CRain 36%
Autumn in Lahti has typical daily highs of about 7°C and lows of about 4°C, with a 36% chance of rain on a given day.
When is the rainy season in Lahti?
Lahti has no sharply defined rainy season: the chance of rain on a given day runs from 24% in April, the driest month, to 46% in February, the wettest.
What time of year is Lahti windiest?
Winds in Lahti are highest in November, averaging 2.4 m/s (9 km/h), and lightest in July, at 1.9 m/s (7 km/h). The prevailing wind is from the SW.
What is the average temperature in Lahti year round?
The average temperature in Lahti over the whole year is 6°C. July is the hottest month, with highs of about 21°C; January is the coldest, with lows of about -6°C.