Annual mean 9°C · wettest around May · prevailing wind SW
Warmest
25.3 °C
Coldest
-3.8 °C
Wettest
45%
Windiest
5.7 m/s
Prevailing
SW
4.8 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 Waukesha 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. Waukesha has no sharply defined rainy season: the chance of rain on a given day runs from 51% in February, the driest month, to 58% in May, the wettest. Winds in Waukesha are highest in February, averaging 4.2 m/s (15 km/h), and lightest in August, at 2.9 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Waukesha come in July, when the sky is typically 40% covered; January is the cloudiest month, at 65%.
Month by month Waukesha 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
53%
65%
4.0 m/s
0
0
1
February
-1°C
-5°C
-7°C
51%
53%
4.2 m/s
0
0
4
March
4°C
-0°C
-1°C
57%
55%
4.2 m/s
1
0
13
April
10°C
4°C
5°C
58%
56%
4.2 m/s
12
0
36
May
16°C
11°C
14°C
58%
52%
3.7 m/s
41
7
62
June
23°C
17°C
22°C
56%
43%
3.4 m/s
66
29
52
July
25°C
19°C
25°C
55%
40%
3.0 m/s
64
49
31
August
25°C
18°C
25°C
56%
42%
2.9 m/s
70
42
37
September
22°C
15°C
20°C
55%
45%
3.1 m/s
68
21
61
October
14°C
8°C
10°C
57%
51%
3.6 m/s
28
3
56
November
6°C
2°C
1°C
54%
53%
3.9 m/s
6
0
20
December
0°C
-3°C
-5°C
52%
61%
3.9 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 Waukesha weather by season
Year round, Waukesha 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 19°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around May 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.
Waukesha weather in winterDecember to February
High -1°CLow -5°CRain 52%
Winter in Waukesha has typical daily highs of about -1°C and lows of about -5°C, with a 52% chance of rain on a given day.
Waukesha weather in springMarch to May
High 10°CLow 5°CRain 58%
Spring in Waukesha has typical daily highs of about 10°C and lows of about 5°C, with a 58% chance of rain on a given day.
Waukesha weather in summerJune to August
High 24°CLow 18°CRain 55%
Summer in Waukesha has typical daily highs of about 24°C and lows of about 18°C, with a 55% chance of rain on a given day.
Waukesha weather in autumnSeptember to November
High 14°CLow 8°CRain 56%
Autumn in Waukesha has typical daily highs of about 14°C and lows of about 8°C, with a 56% chance of rain on a given day.
When is the rainy season in Waukesha?
Waukesha has no sharply defined rainy season: the chance of rain on a given day runs from 51% in February, the driest month, to 58% in May, the wettest.
What time of year is Waukesha windiest?
Winds in Waukesha are highest in February, averaging 4.2 m/s (15 km/h), and lightest in August, at 2.9 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Waukesha year round?
The average temperature in Waukesha 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.