Forecast Details for Chicago, IL

Recent Locations: Chicago, IL

Today: A slight chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a temperature falling to around 50 by 5pm. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.

Tonight: A 10 percent chance of showers before 10pm. Mostly cloudy, with a low around 41. Breezy, with a north wind around 20 mph, with gusts as high as 40 mph.

Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 49. North wind around 15 mph, with gusts as high as 30 mph.

Saturday Night: Mostly clear, with a low around 41. North wind 5 to 10 mph, with gusts as high as 15 mph.

Sunday: Mostly sunny, with a high near 58. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

Sunday Night: Partly cloudy, with a low around 52.

Monday: Mostly sunny, with a high near 79.

Monday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64.

Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76.

Tuesday Night: Mostly cloudy, with a low around 45.

Wednesday: Partly sunny, with a high near 54.

Wednesday Night: Mostly cloudy, with a low around 47.

Thursday: A chance of showers. Mostly cloudy, with a high near 59.

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Current U.S. National Radar--Current

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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 Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds