National Weather Service United States Department of Commerce

Cold Front Crossing the Central U.S.

A cold front over the Northern Rockies will move eastward to the Upper Mississippi Valley/Central Plains by Monday. Rain will develop along the boundary over the Upper Midwest and move into the Upper Great Lakes by Monday. Some of the thunderstorms could become severe in portions of Texas through Monday.
Read More...

Hazardous Weather Conditions

Current Conditions

McHenry County

Zone Forecast

  • Today Mostly cloudy. Chance of showers and a slight chance of thunderstorms in the morning...then showers likely and a chance of thunderstorms in the afternoon. Highs in the mid 70s. Southwest winds 10 to 15 mph. Chance of precipitation 70 percent.
  • Tonight Partly cloudy with a 30 percent chance of showers early in the evening...then mostly clear in the late evening and overnight. Lows in the lower 40s. Northwest winds 10 to 15 mph.
  • Tuesday Mostly sunny. Highs in the upper 50s. Northwest winds 10 to 20 mph.
  • Tuesday Night Mostly clear. Lows in the lower 30s. Northeast winds around 10 mph in the evening becoming light and variable after midnight.
  • Wednesday Mostly sunny in the morning...then partly sunny with a 20 percent chance of rain showers in the afternoon. Highs in the mid 50s. East winds 10 to 15 mph.
  • Wednesday Night Mostly cloudy with a 40 percent chance of showers. Lows in the lower 40s.
  • Thursday Showers and thunderstorms likely. Highs in the lower 60s. Chance of precipitation 60 percent.
  • Thursday Night Partly cloudy. Chance of showers and thunderstorms in the evening...then a slight chance of showers after midnight. Lows in the mid 40s. Chance of precipitation 40 percent.
  • Friday Partly sunny with a 20 percent chance of showers. Highs in the lower 60s.
  • Friday Night And Saturday Partly cloudy. Lows in the upper 30s. Highs in the lower 50s.
  • Saturday Night Partly cloudy with a 20 percent chance of rain showers. Lows in the mid 30s.
  • Sunday Partly sunny with a 30 percent chance of rain showers. Highs in the lower 50s.