Annual mean 9°C · wettest around April · prevailing wind SW
Warmest
25.2 °C
Coldest
-3.6 °C
Wettest
24%
Windiest
5.9 m/s
Prevailing
SW
5.0 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 West Allis over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -6°C. West Allis has no sharply defined rainy season: the chance of rain on a given day runs from 33% in February, the driest month, to 43% in April, the wettest. Winds in West Allis are highest in February, averaging 4.5 m/s (16 km/h), and lightest in August, at 3.2 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in West Allis come in July, when the sky is typically 44% covered; January is the cloudiest month, at 67%.
Month by month West Allis 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
-3°C
-6°C
-9°C
36%
67%
4.3 m/s
0
0
1
February
-1°C
-5°C
-7°C
33%
57%
4.5 m/s
0
0
4
March
4°C
0°C
-1°C
42%
59%
4.5 m/s
1
0
12
April
9°C
5°C
5°C
43%
60%
4.4 m/s
11
0
35
May
16°C
11°C
13°C
42%
56%
3.9 m/s
40
6
63
June
22°C
17°C
21°C
40%
48%
3.6 m/s
67
28
56
July
25°C
20°C
25°C
39%
44%
3.3 m/s
66
48
33
August
25°C
19°C
24°C
40%
46%
3.2 m/s
72
42
39
September
21°C
15°C
20°C
40%
49%
3.5 m/s
70
21
63
October
14°C
9°C
10°C
42%
55%
3.9 m/s
29
3
58
November
6°C
2°C
1°C
37%
57%
4.2 m/s
6
0
22
December
1°C
-2°C
-5°C
35%
64%
4.2 m/s
0
0
4
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 West Allis weather by season
Year round, West Allis has days of about -3°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -6°C to 20°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around April 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.
West Allis weather in winterDecember to February
High -1°CLow -4°CRain 35%
Winter in West Allis has typical daily highs of about -1°C and lows of about -4°C, with a 35% chance of rain on a given day.
West Allis weather in springMarch to May
High 10°CLow 5°CRain 42%
Spring in West Allis has typical daily highs of about 10°C and lows of about 5°C, with a 42% chance of rain on a given day.
West Allis weather in summerJune to August
High 24°CLow 19°CRain 40%
Summer in West Allis has typical daily highs of about 24°C and lows of about 19°C, with a 40% chance of rain on a given day.
West Allis weather in autumnSeptember to November
High 14°CLow 9°CRain 40%
Autumn in West Allis has typical daily highs of about 14°C and lows of about 9°C, with a 40% chance of rain on a given day.
When is the rainy season in West Allis?
West Allis has no sharply defined rainy season: the chance of rain on a given day runs from 33% in February, the driest month, to 43% in April, the wettest.
What time of year is West Allis windiest?
Winds in West Allis are highest in February, averaging 4.5 m/s (16 km/h), and lightest in August, at 3.2 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in West Allis year round?
The average temperature in West Allis over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -6°C.