Historical weather data, all-time temperature records, and monthly climate averages for Waunakee, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Waunakee sits squarely in that unpredictable shoulder season — the average high is just 50° with lows dipping to 31°, but the date has seen everything from a balmy 76° back in 1942 to a brutal 12° in 1975. There's a 1-in-10 chance of snow today, so don't put the scraper away just yet.
Waunakee knows weather at its most extreme — 86 years of records span a jaw-dropping 141 degrees between the all-time low of -37° in January 1951 and the all-time high of 104° in July 1976. A single December day in 1990 buried the town under 17.3 inches of snow, and a June storm in 1996 dumped 4.51 inches of rain in 24 hours.
Summer is Waunakee's sweet spot, with highs peaking around 83-84° in mid-July, while January and February are brutally cold, averaging just 27-31° for highs. If rain is your concern, mid-to-late June is the wettest stretch of the year. Spring and fall offer mild temps but come with plenty of variability — plan accordingly.