Waukesha (WI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Waukesha.
Climate overview of Waukesha
The climate in Waukesha, Wisconsin, United States of America, is marked by large temperature swings across the seasons, ranging from 27°C (81°F) in July to -3°C (27°F) in January.
Annual rain/snowfall is moderate at around 955 mm (38 in), with June being the wettest month. The city also has warm summers and very cold winters. July is the sunniest month, averaging 10.6 hours of sunshine per day.
Waukesha Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Waukesha - and find the best time to visit.
Monthly Temperature in Waukesha
In Waukesha, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 27°C (81°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -3°C (27°F).
At night, temperatures range from around 16°C (61°F) in July to -11°C (12°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Waukesha
On average, Waukesha receives a reasonable amount of rain/snowfall, with an annual precipitation of 955 mm (38 in). Waukesha can be quite wet during June, receiving approximately 143 mm (5.6 in) of precipitation over 12 rainy days.
In contrast, during the driest month (January), you will experience much drier conditions, with 33 mm (1.3 in) of precipitation spread across 9 snowy days. For more details, please visit our Waukesha Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Waukesha
Waukesha can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.5 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Waukesha by Month
The relative humidity is high throughout the year in Waukesha.
The city experiences its highest humidity in December, reaching 76%. In April, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Waukesha
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July and September
- Warmest weather: July and August
- Most sunshine: June and July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -11°C (12°F).
Frequently asked questions about the climate in Waukesha
What is the best time to visit Waukesha?
May, July and September typically offer the most optimal weather in Waukesha. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Waukesha has warm summers and very cold winters.
What temperatures can I expect in Waukesha?
Daytime highs range from -3°C (27°F) in January to 27°C (81°F) in July. Nighttime lows range from -11°C (12°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Waukesha get?
Annual rainfall is around 955 mm (38 in). June is the wettest month with 143 mm (5.6 in), while January is the driest with 33 mm (1.3 in).
How sunny is Waukesha?
Waukesha receives around 2,486 hours of sunshine per year. July is the sunniest month with 319 hours, while December is the cloudiest with just 104 hours. Overall, Waukesha enjoys abundant sunshine.
Waukesha 3-Day Forecast
Waukesha (WI) 3-Day Forecast
Waukesha on the map
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