National Weather Service United States Department of Commerce

Arctic air to drop temperatures across the northern Plain and northern Rockies; will bring snow to the Intermountain West

An arctic front is forecast to plunge through the northern Plains and northern Rockies on Saturday bringing a drastic drop in temperatures across these areas with a burst of snow over much of the Intermountain Region. Arctic air will also filter into the Pacific Northwest bringing with it snow showers and subfreezing low temperatures.
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Hazardous Weather Conditions

Current Conditions

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Crystal Lake IL

7 Day Forecast

For More Weather Information:

Chicago, IL Local Forecast Office

Tonight

Patchy Fog

Patchy
Fog

Low: 34 °F

Saturday

Patchy Fog

Patchy
Fog

High: 50 °F

Saturday
Night

Partly Cloudy

Partly
Cloudy

Low: 39 °F

Sunday

Partly Sunny

Partly
Sunny

High: 41 °F

Sunday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 16 °F

Monday

Mostly Sunny

Mostly
Sunny

High: 21 °F

Monday
Night

Mostly Clear

Mostly
Clear

Low: 9 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 30 °F

Tuesday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 21 °F

Detailed Forecast

  • Tonight Patchy fog after midnight. Otherwise, mostly cloudy, with a steady temperature around 34. South wind 10 to 15 mph.
  • Saturday Patchy fog before 8am. Otherwise, partly sunny, with a high near 50. South southwest wind around 15 mph, with gusts as high as 25 mph.
  • Saturday Night Partly cloudy, with a low around 39. Southwest wind 10 to 15 mph.
  • Sunday Partly sunny, with a high near 41. West southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.
  • Sunday Night Mostly cloudy, with a low around 16. Northwest wind around 15 mph, with gusts as high as 20 mph.
  • Monday Mostly sunny, with a high near 21.
  • Monday Night Mostly clear, with a low around 9.
  • Tuesday Mostly sunny, with a high near 30.
  • Tuesday Night Mostly cloudy, with a low around 21.
  • Wednesday Mostly sunny, with a high near 34.
  • Wednesday Night Partly cloudy, with a low around 21.
  • Thursday A slight chance of rain and snow. Partly sunny, with a high near 35.
  • Thursday Night A slight chance of rain and snow. Mostly cloudy, with a low around 26.
  • Friday Partly sunny, with a high near 36.