Historical weather data, all-time temperature records, and monthly climate averages for Platteville, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Platteville sits right in the heart of spring's unpredictability — 85 years of data show an average high of 53° and low of 34°, but the date has swung wildly from a balmy 81° in 1991 to a bitter 15° in 1995. There's a 1-in-3 chance of precipitation today, though snow is nearly off the table at just 1%.
Platteville's weather has real teeth — the all-time high of 108° on July 14, 1995 and all-time low of -37° on January 17, 2009 represent a jaw-dropping 145-degree swing over the station's history. Single-day extremes go further: 8.8 inches of rain fell on July 28, 2011, and 13 inches of snow buried the town on January 27, 1996.
Summer is the clear sweet spot, with average highs peaking around 85° the week of July 16–22, while early January bottoms out at a frigid 28°. If rain is your concern, mid-June is the wettest stretch of the year, averaging 1.26 inches in a single week. Spring and fall offer mild shoulders, but April through May can still surprise you with cold snaps.