Weather Alert
Grundy County Weather Warning NWS WEATHER ALERT FOR THE GRUNDY COUNTY, IL AREA - Issued: 137 PM CST Mon Mar 2 2026 Grundy County Weather Warning

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Grundy County, IL Weather - Hour by Hour Forecast

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Grundy County, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 37°F3°C, dew point 28°F-3°C, humidity 69%. Wind direction is N at 0 mph0 km/h with visibility of 10 mi16 km. Barometric pressure is 30.19 in1022 mb.
Rest of Tonight - Mostly cloudy. A slight chance of rain late. Near steady temperature in the mid 30s. East winds around 5 mph. Chance of precipitat.. Full Forecast
Tuesday - Cloudy. Rain likely, mainly in the morning. Highs in the mid 40s. East winds around 5 mph. Chance of precipitation 70%... Full Forecast

Grundy County Hourly Weather

24 Hour Forecast Scroll
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Grundy County, IL Hourly Weather - Cloudy - 12:00 AM Grundy County, IL Hourly Weather - Cloudy - 1:00 AM Grundy County, IL Hourly Weather - Cloudy - 2:00 AM Grundy County, IL Hourly Weather - Cloudy - 3:00 AM Grundy County, IL Hourly Weather - Cloudy - 4:00 AM Grundy County, IL Hourly Weather - Cloudy - 5:00 AM Grundy County, IL Hourly Weather - Cloudy - 6:00 AM Grundy County, IL Hourly Weather - Cloudy - 7:00 AM Grundy County, IL Hourly Weather - Cloudy - 8:00 AM Grundy County, IL Hourly Weather - Cloudy - 9:00 AM Grundy County, IL Hourly Weather - Cloudy - 10:00 AM Grundy County, IL Hourly Weather - Cloudy - 11:00 AM Grundy County, IL Hourly Weather - Cloudy - 12:00 PM Grundy County, IL Hourly Weather - Cloudy - 1:00 PM Grundy County, IL Hourly Weather - Cloudy - 2:00 PM Grundy County, IL Hourly Weather - Cloudy - 3:00 PM Grundy County, IL Hourly Weather - Cloudy - 4:00 PM Grundy County, IL Hourly Weather - Cloudy - 5:00 PM Grundy County, IL Hourly Weather - Cloudy - 6:00 PM Grundy County, IL Hourly Weather - Cloudy - 7:00 PM Grundy County, IL Hourly Weather - Cloudy - 8:00 PM Grundy County, IL Hourly Weather - Cloudy - 9:00 PM Grundy County, IL Hourly Weather - Cloudy - 10:00 PM Grundy County, IL Hourly Weather - Cloudy - 11:00 PM
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
35°F2°C 35°F2°C 35°F2°C 35°F2°C 35°F2°C 35°F2°C 35°F2°C 36°F2°C 37°F3°C 38°F3°C 39°F4°C 40°F4°C 41°F5°C 41°F5°C 42°F6°C 42°F6°C 41°F5°C 41°F5°C 40°F4°C 40°F4°C 40°F4°C 40°F4°C 40°F4°C 39°F4°C
- - - - - - - Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain
0% 0% 0% 0% 0% 0% 0% 25% 25% 25% 25% 25% 25% 33% 33% 33% 33% 33% 33% 43% 43% 43% 43% 43%
29°F-2°C 29°F-2°C 30°F-1°C 30°F-1°C 30°F-1°C 31°F-1°C 31°F-1°C 32°F0°C 33°F1°C 34°F1°C 35°F2°C 36°F2°C 37°F3°C 38°F3°C 39°F4°C 40°F4°C 40°F4°C 39°F4°C 39°F4°C 39°F4°C 38°F3°C 38°F3°C 38°F3°C 37°F3°C
78% 78% 82% 82% 82% 85% 85% 85% 85% 85% 85% 85% 86% 89% 89% 93% 96% 93% 96% 96% 92% 92% 92% 92%
ESE ESE ESE ESE ESE ESE ESE ESE SE SE SE SE SE ESE E E E ENE ENE ENE ENE ENE ENE ENE
3 mph 3 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 3 mph 3 mph 3 mph 3 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km 5 mi8 km 5 mi8 km 5 mi8 km 6 mi10 km 6 mi10 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km 5 mi8 km 5 mi8 km 5 mi8 km 5 mi8 km 5 mi8 km
Hour (CST)
Weather
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Temperature
Precip. Type
POP
Dewpoint
Humidity
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Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KC09 model statistics.

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Prob Precip % = Probability of Precipitation.

Grundy County 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

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