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Grundy Co
 Details for Grundy Co Severe Thunderstorm Watch  +1 additional alert
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NWS Central Great Lakes Regional Radar WU Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 09-Aug-2026 11:15pm - next update at 11:20pm  
Summary / Temperature Wind Rain Outlook
Night time, Moderate drizzle Night time, Moderate drizzle
Currently: 79.2°F, Max: 91.6°F, Min: 66.7°F 79.2°F
Colder 1.2°F than last hour.

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Feels like: 83°F

24-hr difference
9.3°FWarmer 9.3°F than yesterday at this time.
  Today Yesterday
High: 91.6°F
1:49pm 		84.9°F
2:36pm
Low: 66.7°F
7:00am 		64.9°F
4:42am
Calm SSE
0
Gust:
 0 mph
0 Bft - Calm
Today: 14 mph 2:00pm
Gust Month: 14.0 mph August 9
Rain Today: 0.01 in
Rain Rate (/hr): 0.013 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 0.451 in
Season Total: 30.37 in
4 rain days in August.
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 88 % Increased 3.0% since last hour.
Dew Point: 75.3°F Decreased 0.1°F since last hour.
Barometer: 29.849 inHg Falling 0.01 inHg/hr
Baro Trend: Steady
Sunrise: 5:57am
Sunset: 7:59pm
Moonrise: 3:02am
Moonset: 6:46pm
Waning Crescent
Waning Crescent, Moon at 26 days in cycle
9%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 6.7 @ 1:38pm
0 W/m2 (0 %)
High: 1011 @  1:25pm
 NWS Weather Forecast  - Outlook: Tonight & Monday
Tonight

Tonight: Showers And Thunderstorms
Showers And T-Storms

Lo 72 °F		 NWS forecast: Showers and thunderstorms. Some of the storms could be severe and produce heavy rain. Mostly cloudy, with a low around 72. South southwest wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Davis VP+ forecast: Increasing clouds with little temp change.
 
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Hi 87 °F		 NWS forecast: A chance of showers and thunderstorms. Partly sunny, with a high near 87. Heat index values as high as 97. South southwest wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 30%. New rainfall amounts between a half and three quarters of an inch possible.