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Grundy Co
 Details for Grundy Co Heat Advisory
Heat Advisory HEAT ADVISORY - Grundy Co

NWS Central Great Lakes Regional Radar WU Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 01-Sep-2026 11:10pm - next update at 11:15pm  
Summary / Temperature Wind Rain Outlook
Night time, Dry Night time, Dry
Currently: 79.0°F, Max: 97.3°F, Min: 75.7°F 79°F
Colder 2.0°F than last hour.

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Feels like: 82°F

24-hr difference
-0.5°FColder 0.5°F than yesterday at this time.
  Today Yesterday
High: 97.3°F
3:22pm 		94.1°F
2:29pm
Low: 75.7°F
7:14am 		69°F
7:12am
Calm S
0
Gust:
 0 mph
0 Bft - Calm
Today: 8.1 mph 3:50pm
Gust Month: 8.0 mph September 1
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 0 in
Season Total: 35.731 in
0 day since last rain.
Wednesday

Wednesday: Sunny
Sunny
Humidity & Barometer Almanac Moon
Humidity: 83 % Increased 4.0% since last hour.
Dew Point: 73.4°F Decreased 0.5°F since last hour.
Barometer: 29.908 inHg  
Baro Trend: Steady
Sunrise: 6:20am
Sunset: 7:25pm
Moonset: 12:25pm
Moonrise: 9:26pm
Waning Gibbous
Waning Gibbous, Moon at 19 days in cycle
74%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 6.3 @ 1:02pm
0 W/m2 (0 %)
High: 795 @  1:03pm
 NWS Weather Forecast  - Outlook: Tonight & Wednesday
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 73 °F		 NWS forecast: Mostly clear, with a low around 73. South southwest wind around 5 mph, with gusts as high as 15 mph.
Davis VP+ forecast: Increasing clouds with little temp change.
 
Wednesday

Wednesday: Sunny
Sunny

Hi 94 °F		 NWS forecast: Sunny. High near 94, with temperatures falling to around 92 in the afternoon. Heat index values as high as 103. Southwest wind 5 to 15 mph.