Historical weather data, all-time temperature records, and monthly climate averages for Fitchburg, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Fitchburg sits squarely in transition season — expect a typical high around 51° and a low near 30°, with a 41% chance of rain. The date has swung wildly over 54 years of records, from a brutal 8° in 1975 to a shirt-sleeve 74° in 2016. Snow is possible but unlikely, with just a 2% historical chance.
Fitchburg's weather has real teeth on both ends — the all-time high hit a scorching 108° on August 2, 1988, while the coldest day on record bottomed out at -38° on February 3, 1996, a swing of 146 degrees. A single August storm dumped 6.01 inches of rain in 2018, and a December blast in 2012 buried the area under 13.5 inches of snow in one day.
Summer is short but warm, peaking in late July with average highs of 84°, while January is brutal with highs only reaching 27°. If you're visiting for good weather, aim for May through September when highs climb from 70° to the low 80s. Pack an umbrella for mid-June — it's historically the wettest stretch of the year.