Historical weather data, all-time temperature records, and monthly climate averages for Superior, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Superior sits right on the shoulder of winter, with an average high of just 42° and a low of 27° across 115 years of records. The date has swung wildly, though — from a brutal 9° in 1920 to a remarkable 82° in 1991. There's only a 10% chance of snow today, so the worst is likely behind you.
Superior's weather has real teeth: the city has touched 105° in July 1936 and plunged to -38° in February 1967, a swing of 143 degrees between its all-time extremes. A single day in July 1958 dumped 5.75 inches of rain, and a February 2001 snowstorm buried the city under 18 inches in 24 hours.
Superior's summer is short and sweet, peaking in late July with average highs near 79°, while early January bottoms out around 21°. If you're chasing dry weather, avoid mid-to-late June — that's the wettest stretch of the year, averaging over an inch of precipitation per week. Spring and fall offer mild transitions, but both can still bite with cold snaps well into April and as early as October.