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Grundy County
 Details for Grundy County Heat Advisory

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Heat Advisory HEAT ADVISORY - Grundy County

NWS North Mississippi Valley Regional Radar WU North Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 02-Sep-2026 11:40pm - next update at 6:00pm  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 80.3, Max: 96.5, Min: 73.9 80.3°F
Warmer 0.8°F than last hour.

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Feels like: 85°F

24-hr difference
2.4°FWarmer 2.4°F than yesterday at this time.
  Today Yesterday
High: 96.5°F
3:31pm 		96.8°F
4:13pm
Low: 73.9°F
6:13am 		74.6°F
7:10am
Wind from SW SW
0.4
Gust:
 1.0 mph
1 Bft - Calm
Today: 12.0 mph 2:39pm
Gust Month: 12.0 mph September 2
Rain Today: 0.00 in
Rain Rate (/hr): 0.000 in
Rain Yesterday: 0.00 in
Storm Rain: 0.00 in
This Month: 0.00 in
Season Total: 39.58 in
2 days since last rain.
Thursday

Thursday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 83 % Decreased 3.0% since last hour.
Dew Point: 74.7°F Decreased 0.2°F since last hour.
Barometer: 29.870 inHg  
Baro Trend: Steady
Sunrise: 6:21am
Sunset: 7:24pm
Moonset: 1:39pm
Moonrise: 10:01pm
Waning Gibbous
Waning Gibbous, Moon at 20 days in cycle
63%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 4.5 @ 12:25pm
0 W/m2 (0 %)
High: 895 @  1:52pm
 NWS Weather Forecast  - Outlook: Tonight & Thursday
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 74 °F		 NWS forecast: Mostly clear, with a low around 74. South southwest wind around 5 mph, with gusts as high as 15 mph.
 
Thursday

Thursday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms

Hi 92 °F		 NWS forecast: A slight chance of showers and thunderstorms after 4pm. Mostly sunny. High near 92, with temperatures falling to around 90 in the afternoon. Heat index values as high as 103. Southwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.