National Weather Service United States Department of Commerce

Lows tonight will drop into the low to upper 30s, which will allow for frost to form north and west of Burlington and Princeton. After a cold start to the weekend, temperatures will warm throughout the next few days, with highs reaching into the mid 70s by Monday. Rain and a few thunderstorms will return on Sunday and Monday.
Clearing skies and light wind will set the stage for another cold night with temperatures in the low to upper 30s. A frost advisory has been issued from 1am tonight until 8am Saturday. Early blooming plants or trees may be damaged if not protected.
April 2026 was a very warm and wet month across the area. Multiple climate sites observed average temperatures within their top 10 warmest Aprils or precipitation totals within their top 10 wettest Aprils. For Dubuque, this was the wettest April on record with 8.73” of precipitation. For more information: https://www.weather.gov/dvn/Climate_Monthly_04_2026