Annual mean 9°C · wettest around June · prevailing wind W
Warmest
26.4 °C
Coldest
-6.3 °C
Wettest
66%
Windiest
5.2 m/s
Prevailing
W
3.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Onalaska over the whole year is 9°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -9°C. Onalaska has no sharply defined rainy season: the chance of rain on a given day runs from 50% in February, the driest month, to 59% in June, the wettest. Winds in Onalaska are highest in April, averaging 3.7 m/s (13 km/h), and lightest in August, at 2.1 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Onalaska come in July, when the sky is typically 35% covered; December is the cloudiest month, at 57%.
Month by month Onalaska 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
-9°C
-10°C
50%
56%
2.9 m/s
0
0
0
February
-3°C
-8°C
-8°C
50%
42%
3.1 m/s
0
0
5
March
5°C
-2°C
-1°C
54%
48%
3.3 m/s
1
0
15
April
11°C
3°C
6°C
57%
51%
3.7 m/s
14
0
40
May
19°C
11°C
16°C
58%
44%
2.8 m/s
50
10
64
June
25°C
17°C
24°C
59%
37%
2.6 m/s
64
37
41
July
26°C
18°C
27°C
58%
35%
2.2 m/s
54
58
21
August
25°C
17°C
25°C
56%
38%
2.1 m/s
65
47
32
September
22°C
13°C
20°C
55%
38%
2.4 m/s
66
24
57
October
14°C
6°C
10°C
53%
46%
2.8 m/s
27
2
55
November
5°C
0°C
0°C
52%
50%
3.1 m/s
6
0
19
December
-2°C
-5°C
-7°C
50%
57%
3.0 m/s
0
0
3
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 Onalaska weather by season
Year round, Onalaska has days of about -5°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -9°C to 18°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around June and least likely around February. 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.
Onalaska weather in winterDecember to February
High -3°CLow -7°CRain 50%
Winter in Onalaska has typical daily highs of about -3°C and lows of about -7°C, with a 50% chance of rain on a given day.
Onalaska weather in springMarch to May
High 11°CLow 4°CRain 56%
Spring in Onalaska has typical daily highs of about 11°C and lows of about 4°C, with a 56% chance of rain on a given day.
Onalaska weather in summerJune to August
High 25°CLow 17°CRain 57%
Summer in Onalaska has typical daily highs of about 25°C and lows of about 17°C, with a 57% chance of rain on a given day.
Onalaska weather in autumnSeptember to November
High 13°CLow 7°CRain 53%
Autumn in Onalaska has typical daily highs of about 13°C and lows of about 7°C, with a 53% chance of rain on a given day.
When is the rainy season in Onalaska?
Onalaska has no sharply defined rainy season: the chance of rain on a given day runs from 50% in February, the driest month, to 59% in June, the wettest.
What time of year is Onalaska windiest?
Winds in Onalaska are highest in April, averaging 3.7 m/s (13 km/h), and lightest in August, at 2.1 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Onalaska year round?
The average temperature in Onalaska over the whole year is 9°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -9°C.