Historical weather data, all-time temperature records, and monthly climate averages for Allouez, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Allouez is classic late-winter limbo — the average high is just 46° with a low around 30°, and there's a 16% chance you'll still see snow. The date's range tells the whole story: a 75° scorcher in 1921 versus an 11° freeze in 1995.
Allouez has seen weather that would stop anyone cold — literally. The all-time extremes span from a brutal -36° in January 1888 to a punishing 104° in July 1936, a 140-degree swing that captures just how unforgiving this corner of Wisconsin can be.
Summer is the sweet spot here, with late July averaging a comfortable 82° high before temps begin their long slide toward the deep freeze of mid-January, when highs barely reach 24°. If rain is your concern, pack accordingly for mid-June — it's the wettest stretch of the year, averaging nearly an inch of precipitation per week.