Forecast Details for Sumner, IL

Recent Locations: Downs, IL Pella, IA Sumner, IL

Overnight: A 20 percent chance of showers and thunderstorms before 3am. Mostly cloudy, with a low around 59. South southeast wind 9 to 11 mph, with gusts as high as 20 mph.

Thursday: A slight chance of showers between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 15 to 20 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 44 mph. Chance of precipitation is 40%.

Thursday Night: Showers and thunderstorms likely, mainly before 8pm, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 64. Breezy, with a south southwest wind 13 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Friday: Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. South southwest wind 11 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 64. South wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: Showers and possibly a thunderstorm. High near 68. South southwest wind around 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Saturday Night: Mostly cloudy, with a low around 40. West northwest wind 10 to 13 mph, with gusts as high as 20 mph.

Sunday: Sunny, with a high near 56.

Sunday Night: Clear, with a low around 37.

Monday: Sunny, with a high near 62.

Monday Night: Partly cloudy, with a low around 38.

Tuesday: Mostly sunny, with a high near 58.

Tuesday Night: Partly cloudy, with a low around 37.

Wednesday: Mostly sunny, with a high near 66.

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 is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds