Historical weather data, all-time temperature records, and monthly climate averages for Wausau, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Wausau is classic transitional chaos — the average high of 47° sounds pleasant enough, but this date has swung from a balmy 81° in 2021 to a brutal 8° low in 2018. There's a 1-in-8 chance of snow today, so don't put the scraper away just yet.
Wausau plays for keeps on the extremes: 84 years of data capture a searing 102° in July 1995 and a bone-crushing -40° in January 1951 — a 142-degree spread that tells you everything about Wisconsin winters and summers. The snowiest single day on record dropped 23.4 inches as recently as March 2026, a reminder that this city doesn't ease gently out of winter.
Summer is short and sweet, with highs peaking around 81° the second week of July before fading fast into fall. Winters are long and serious — average highs sit at just 22° in early January, and the shoulder months offer little comfort. If you're chasing dry weather, aim for late summer; the wettest stretch runs mid-June, averaging over an inch of rain in a single week.