Forecast Details for Chicago, IL

Recent Locations: Lancaster, CA Chicago, IL

Overnight: Mostly cloudy, with a low around 16. Southwest wind around 5 mph, with gusts as high as 10 mph.

Thursday: A slight chance of snow before 8am, then scattered snow showers between 8am and 3pm. Cloudy, with a high near 30. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

Thursday Night: A chance of snow showers after midnight, mixing with sleet after 3am. Mostly cloudy, with a low around 26. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

Friday: A 30 percent chance of snow showers, mainly before noon. Mostly cloudy, with a high near 37. Breezy, with a north northwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

Friday Night: Mostly cloudy, with a low around 12. Blustery, with a north northwest wind 10 to 20 mph, with gusts as high as 30 mph.

Saturday: Partly sunny, with a high near 23.

Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

Sunday: Mostly cloudy, with a high near 32.

Sunday Night: Partly cloudy, with a low around 22.

Monday: Mostly sunny, with a high near 41.

Monday Night: Partly cloudy, with a low around 31.

Tuesday: Partly sunny, with a high near 42.

Tuesday Night: A chance of showers. Partly cloudy, with a low around 31.

Wednesday: A chance of showers. Mostly sunny, with a high near 40.

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

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

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