Forecast Details for Chicago, IL

Recent Locations: Chicago, IL

Today: A slight chance of showers, then scattered showers and thunderstorms after 7am. Mostly sunny, with a high near 90. Heat index values as high as 96. South southwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

Tonight: Scattered showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 73. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. West wind around 10 mph, with gusts as high as 20 mph.

Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. North wind 5 to 10 mph. Chance of precipitation is 30%.

Saturday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 73. North northeast wind around 5 mph, with gusts as high as 10 mph.

Saturday Night: Mostly clear, with a low around 71.

Sunday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93.

Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 73.

Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 87.

Monday Night: Partly cloudy, with a low around 70.

Tuesday: Sunny, with a high near 80.

Tuesday Night: Partly cloudy, with a low around 68.

Wednesday: Sunny, with a high near 79.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog