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

The climate in Grafton is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -2°C (28°F) in the coolest month, February.

Nights vary from 16°C (61°F) in July to around -10°C (14°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Grafton receives mid-range precipitation levels, with 964 mm (38 in) annually. The climate in Grafton shows significant variation throughout the year. Expect high rainfall in April, the wettest month, with an average of 128 mm (5 in) of precipitation over 13 rainy days.

In contrast, the driest month January offers drier and sunnier days, with around 38 mm (1.5 in) of snowfall over 10 snowy days. For more details, please visit our Grafton Precipitation page.

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

The average number of days each month with precipitation

For those who appreciate different seasons, Grafton serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.0 hours of sunshine daily, and embrace the darker days in January, offering only 4.0 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine