Forecast Details for Naperville, IL

Recent Locations: Conway, SC Addison, IL Naperville, IL

Current Alerts for Naperville, IL: Wind Advisory

Overnight: Showers and possibly a thunderstorm. Low around 38. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: Showers and possibly a thunderstorm. High near 71. Breezy, with an east southeast wind 15 to 20 mph becoming south southwest 20 to 25 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night: Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 48. Windy, with a south southwest wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 64. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 30%.

Friday Night: Showers and possibly a thunderstorm. Low around 46. East northeast wind 10 to 15 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 100%.

Saturday: A 40 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 62. Breezy.

Saturday Night: Mostly cloudy, with a low around 35. Breezy.

Sunday: Partly sunny, with a high near 52.

Sunday Night: Mostly clear, with a low around 35.

Monday: Mostly sunny, with a high near 54.

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

Tuesday: Partly sunny, with a high near 47.

Tuesday Night: Mostly cloudy, with a low around 33.

Wednesday: Partly sunny, with a high near 62. Breezy.

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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)

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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