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 Details for Naperville Flash Flood Warning  +2 additional alerts
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 Details for Campton Hills Extreme Heat Warning

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Flash Flood Warning FLASH FLOOD WARNING - Naperville
Extreme Heat Warning EXTREME HEAT WARNING - Campton Hills
Severe Thunderstorm Watch SEVERE THUNDERSTORM WATCH - Naperville
Heat Advisory HEAT ADVISORY - Naperville

NWS Central Great Lakes Regional Radar WU North Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 21-Jul-2026 3:42pm - next update at 3:45pm  
Summary / Temperature Wind Rain Outlook
Light thunderstorm, Mostly cloudy Light thunderstorm, Mostly cloudy
Currently: 82.6, Max: 83.6, Min: 69.6 82.6°F
Warmer 0.1°F than last hour.

Warm

Feels like: 79°F

24-hr difference
3.6°FWarmer 3.6°F than yesterday at this time.
  Today Yesterday
High: 83.6°F
3:23pm 		81.3°F
5:05pm
Low: 69.6°F
6:11am 		57.2°F
5:50am
Wind from NNW NNW
4
Gust:
 11 mph
1 Bft - Light air
Today: 16 mph 12:05pm
Gust Month: 28.0 mph July 3
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
This Month: 0.02 in
Season Total: 12.65 in
18 days since last rain.
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Humidity & Barometer Almanac Moon
Humidity: 1 %  
Dew Point: -27.6°F  
Barometer: 29.776 inHg Rising 0.01 inHg/hr
Baro Trend: Steady
Sunrise: 5:41am
Sunset: 8:19pm
Moonset: 3:25am
Moonrise: 7:32pm
Waxing Gibbous
Waxing Gibbous, Moon at 12 days in cycle
97%
Illuminated
UV Index Solar Radiation
   1.9     Low 
High: 6.4 @ 12:45pm
204 W/m2
High: 984 @  1:24pm
 NWS Weather Forecast  - Outlook: This Afternoon & Tonight
This
Afternoon
This Afternoon: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms

Hi 91 °F		 NWS forecast: A slight chance of showers and thunderstorms. Mostly sunny. High near 91, with temperatures falling to around 87 in the afternoon. Heat index values as high as 107. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Davis VP+ forecast: Mostly cloudy and cooler. Precipitation possible within 12 hours, possibly heavy at times. Windy.
 
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy

Lo 67 °F		 NWS forecast: A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 67. Northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
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