Annual mean 6°C · wettest around February · prevailing wind SW
Warmest
21.9 °C
Coldest
-6.3 °C
Wettest
39%
Windiest
4.6 m/s
Prevailing
SW
4.0 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Riihimäki 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 -5°C. The rainy (wet) season in Riihimäki runs from October to February, peaking in February with a 33% chance of rain on a given day. The dry season is March to September; May is the driest month, at 12%. Winds in Riihimäki are highest in January, averaging 3.6 m/s (13 km/h), and lightest in July, at 3.0 m/s (11 km/h). The prevailing wind is from the SW. The clearest skies in Riihimäki come in May, when the sky is typically 48% covered; November is the cloudiest month, at 85%.
Month by month Riihimäki 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
-4°C
-5°C
-9°C
33%
82%
3.6 m/s
0
0
0
February
-3°C
-5°C
-8°C
33%
77%
3.4 m/s
0
0
0
March
1°C
-3°C
-4°C
21%
66%
3.4 m/s
0
0
2
April
7°C
1°C
2°C
16%
58%
3.4 m/s
1
0
20
May
14°C
7°C
10°C
12%
48%
3.2 m/s
24
1
61
June
19°C
13°C
16°C
15%
49%
3.3 m/s
52
8
73
July
21°C
15°C
19°C
14%
52%
3.0 m/s
71
15
70
August
19°C
13°C
17°C
14%
57%
3.1 m/s
69
5
80
September
14°C
9°C
12°C
19%
62%
3.0 m/s
28
1
75
October
7°C
5°C
4°C
31%
74%
3.5 m/s
1
0
29
November
2°C
1°C
-2°C
31%
85%
3.6 m/s
0
0
5
December
-2°C
-3°C
-6°C
25%
85%
3.5 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 Riihimäki weather by season
Year round, Riihimäki has days of about -4°C at their warmest in January, its coolest month, and 21°C in July, its warmest; the coolest hours of the day run from -5°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 May. 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.
Riihimäki weather in winterDecember to February
High -3°CLow -4°CRain 30%
Winter in Riihimäki has typical daily highs of about -3°C and lows of about -4°C, with a 30% chance of rain on a given day.
Riihimäki weather in springMarch to May
High 7°CLow 1°CRain 16%
Spring in Riihimäki has typical daily highs of about 7°C and lows of about 1°C, with a 16% chance of rain on a given day.
Riihimäki weather in summerJune to August
High 20°CLow 13°CRain 14%
Summer in Riihimäki has typical daily highs of about 20°C and lows of about 13°C, with a 14% chance of rain on a given day.
Riihimäki weather in autumnSeptember to November
High 8°CLow 5°CRain 27%
Autumn in Riihimäki has typical daily highs of about 8°C and lows of about 5°C, with a 27% chance of rain on a given day.
When is the rainy season in Riihimäki?
The rainy (wet) season in Riihimäki runs from October to February, peaking in February with a 33% chance of rain on a given day. The dry season is March to September; May is the driest month, at 12%.
What time of year is Riihimäki windiest?
Winds in Riihimäki are highest in January, averaging 3.6 m/s (13 km/h), and lightest in July, at 3.0 m/s (11 km/h). The prevailing wind is from the SW.
What is the average temperature in Riihimäki year round?
The average temperature in Riihimäki 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 -5°C.