National Weather Service United States Department of Commerce

Frost is expected to develop early Monday morning around Black River Falls and Tomah, where light winds, dry conditions, and clear skies will lead to temperatures tumbling into the 30s. Cold-sensitive plans will need some protection.
A few rounds of showers and storms are likely to move over the region on Monday and Tuesday. Heavy rain will be possible with a few of these rounds, especially on Monday night into Tuesday morning. If storms repeatedly move over locations, rainfall could exceed 3 inches which may lead to flooding.
Cooler temperatures are in store through midweek with highs staying in the mid 60s to mid 70s. Widespread rain chances for Monday into Tuesday and again on Wednesday.