Historical weather data, all-time temperature records, and monthly climate averages for Richfield, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Richfield sits squarely in that unpredictable shoulder season — average highs of 49° and lows of 30° with a 40% chance of precipitation. The date's range tells the whole story: a balmy 73° back in 1956, and a brutal 13° low as recently as 1995. Don't put the layers away just yet.
Richfield earns its Midwest stripes with a 144-degree swing between its all-time extremes — a scorching 104° in July 2012 and a bone-crushing -40° in January 1982. The wettest single day on record, 8.62 inches in August 2025, is a reminder that summer storms here mean business.
Summer is the clear sweet spot, with highs peaking around 81-82° in mid-July before tapering into a pleasant fall. Winters are legitimately cold — average highs barely crack 26° in mid-January — so plan accordingly. If you're watching for rain, late June is historically the wettest stretch of the year.