Oconomowoc (WI) Weather & Climate: Best Time to Visit

Visitors to Oconomowoc can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 28°C (82°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 -12°C (10°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Oconomowoc experiences moderate precipitation patterns, averaging 959 mm (38 in) yearly. Oconomowoc can be quite wet during June, receiving approximately 143 mm (5.6 in) of precipitation over 13 rainy days.

In contrast, during the driest month (January), you will experience much drier conditions, with 37 mm (1.5 in) of precipitation spread across 11 snowy days. For more details, please visit our Oconomowoc Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Oconomowoc 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

The relative humidity is high throughout the year in Oconomowoc.

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