Forecast Details for Naperville, IL

Recent Locations: Empire, CA Saratoga, TX Naperville, IL

Current Alerts for Naperville, IL: Air Quality Alert

Tonight: Widespread haze between 10pm and 4am. Mostly clear, with a low around 72. South wind 5 to 10 mph.

Saturday: Mostly sunny, with a high near 94. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 73. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Sunday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. West southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

Sunday Night: Partly cloudy, with a low around 64. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

Monday: Mostly sunny, with a high near 86.

Monday Night: Partly cloudy, with a low around 65.

Tuesday: Mostly sunny, with a high near 90.

Tuesday Night: A chance of showers after 1am. Mostly cloudy, with a low around 69.

Wednesday: A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86.

Wednesday Night: Mostly cloudy, with a low around 66.

Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 86.

Thursday Night: Partly cloudy, with a low around 66.

Friday: A chance of showers. Sunny, with a high near 89.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

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