Forecast Details for Chicago O'Hare International Airport, IL

Current Alerts for Chicago O'Hare International Airport, IL: Wind Advisory
Tonight: Partly cloudy, with a low around 38. Breezy, with a west wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 45 mph.
Friday: Sunny, with a high near 54. Northwest wind 5 to 10 mph becoming light in the afternoon.
Friday Night: Mostly clear, with a low around 39. East wind around 5 mph becoming calm.
Saturday: Sunny, with a high near 60. Calm wind becoming south southeast around 5 mph in the morning. Winds could gust as high as 10 mph.
Saturday Night: Rain likely after 1am. Mostly cloudy, with a low around 47. Southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Sunday: Rain. High near 64. Chance of precipitation is 90%.
Sunday Night: Rain and possibly a thunderstorm. Low around 59. Chance of precipitation is 90%.
Monday: Rain. Cloudy, with a high near 70.
Monday Night: Rain and possibly a thunderstorm. Cloudy, with a low around 61.
Tuesday: Rain, mainly before 1pm. Mostly cloudy, with a high near 69. Breezy.
Tuesday Night: A chance of rain. Partly cloudy, with a low around 42.
Wednesday: Sunny, with a high near 57.
Wednesday Night: Mostly clear, with a low around 40.
Thursday: Sunny, with a high near 55.

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

Want to Receive our Free Daily Forecast Emails in your inbox by 5 a.m.?
There are no ads! Learn More
We respect your privacy and will not share or sell your email with anyone.

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).

Current U.S. National Radar

National Weather Forecast--Current

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

Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow