Annual mean 5°C · wettest around February · prevailing wind SW
Warmest
20.9 °C
Coldest
-9.4 °C
Wettest
36%
Windiest
4.4 m/s
Prevailing
SW
3.7 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 Siilinjärvi over the whole year is 5°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -8°C. The rainy (wet) season in Siilinjärvi runs from November to February, peaking in February with a 32% chance of rain on a given day. The dry season is March to October; May is the driest month, at 14%. Winds in Siilinjärvi are highest in November, averaging 3.6 m/s (13 km/h), and lightest in July, at 2.8 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Siilinjärvi come in June, when the sky is typically 50% covered; November is the cloudiest month, at 87%.
Month by month Siilinjärvi 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
-7°C
-8°C
-13°C
28%
80%
3.4 m/s
0
0
0
February
-5°C
-7°C
-11°C
32%
76%
3.4 m/s
0
0
0
March
-1°C
-5°C
-6°C
22%
65%
3.4 m/s
0
0
1
April
5°C
-1°C
-0°C
20%
59%
3.1 m/s
1
0
12
May
13°C
7°C
8°C
14%
54%
3.1 m/s
19
1
52
June
18°C
13°C
15°C
18%
50%
3.2 m/s
52
6
72
July
20°C
16°C
18°C
21%
51%
2.8 m/s
65
16
68
August
18°C
14°C
16°C
17%
55%
3.0 m/s
63
4
80
September
12°C
9°C
9°C
23%
67%
3.1 m/s
17
0
63
October
5°C
4°C
1°C
21%
79%
3.5 m/s
0
0
18
November
-0°C
-1°C
-5°C
26%
87%
3.6 m/s
0
0
1
December
-5°C
-5°C
-9°C
23%
87%
3.4 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 Siilinjärvi weather by season
Year round, Siilinjärvi has days of about -7°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -8°C to 16°C through the year, and the average temperature over the year is 5°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.
Siilinjärvi weather in winterDecember to February
High -6°CLow -7°CRain 28%
Winter in Siilinjärvi has typical daily highs of about -6°C and lows of about -7°C, with a 28% chance of rain on a given day.
Siilinjärvi weather in springMarch to May
High 6°CLow 0°CRain 19%
Spring in Siilinjärvi has typical daily highs of about 6°C and lows of about 0°C, with a 19% chance of rain on a given day.
Siilinjärvi weather in summerJune to August
High 19°CLow 14°CRain 19%
Summer in Siilinjärvi has typical daily highs of about 19°C and lows of about 14°C, with a 19% chance of rain on a given day.
Siilinjärvi weather in autumnSeptember to November
High 6°CLow 4°CRain 24%
Autumn in Siilinjärvi has typical daily highs of about 6°C and lows of about 4°C, with a 24% chance of rain on a given day.
When is the rainy season in Siilinjärvi?
The rainy (wet) season in Siilinjärvi runs from November to February, peaking in February with a 32% chance of rain on a given day. The dry season is March to October; May is the driest month, at 14%.
What time of year is Siilinjärvi windiest?
Winds in Siilinjärvi are highest in November, averaging 3.6 m/s (13 km/h), and lightest in July, at 2.8 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Siilinjärvi year round?
The average temperature in Siilinjärvi over the whole year is 5°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -8°C.