Weather Alert
Grimsby Weather Warning NWS WEATHER ALERT FOR THE GRIMSBY, IL AREA - Issued: 428 AM CDT Fri Sep 11 2026 Grimsby Weather Warning

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Grimsby, IL Weather - Hour by Hour Forecast

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Grimsby, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Overcast. Temperature is 75°F24°C, dew point 71°F22°C, humidity 88%. Wind direction is ENE at 6 mph10 km/h with visibility of 9 mi14 km. Barometric pressure is 29.97 in1015 mb.
Today - Mostly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 80s. East winds around 5 mph, becoming southea.. Full Forecast
Tonight - Mostly cloudy with a slight chance of showers in the evening, then partly cloudy with a chance of showers after midnight. Lows in .. Full Forecast

Grimsby Hourly Weather

24 Hour Forecast Scroll
Fri, Sep 11
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Grimsby, IL Hourly Weather - Cloudy - 12:00 PM Grimsby, IL Hourly Weather - Cloudy - 1:00 PM Grimsby, IL Hourly Weather - Cloudy - 2:00 PM Grimsby, IL Hourly Weather - Cloudy - 3:00 PM Grimsby, IL Hourly Weather - Cloudy - 4:00 PM Grimsby, IL Hourly Weather - Cloudy - 5:00 PM Grimsby, IL Hourly Weather - Cloudy - 6:00 PM Grimsby, IL Hourly Weather - Cloudy - 7:00 PM Grimsby, IL Hourly Weather - Cloudy - 8:00 PM Grimsby, IL Hourly Weather - Cloudy - 9:00 PM Grimsby, IL Hourly Weather - Cloudy - 10:00 PM Grimsby, IL Hourly Weather - Cloudy - 11:00 PM Grimsby, IL Hourly Weather - Cloudy - 12:00 AM Grimsby, IL Hourly Weather - Cloudy - 1:00 AM Grimsby, IL Hourly Weather - Cloudy - 2:00 AM Grimsby, IL Hourly Weather - Mostly Cloudy - 3:00 AM Grimsby, IL Hourly Weather - Mostly Cloudy - 4:00 AM Grimsby, IL Hourly Weather - Mostly Cloudy - 5:00 AM Grimsby, IL Hourly Weather - Mostly Cloudy - 6:00 AM Grimsby, IL Hourly Weather - Mostly Cloudy - 7:00 AM Grimsby, IL Hourly Weather - Mostly Cloudy - 8:00 AM Grimsby, IL Hourly Weather - Mostly Clear - 9:00 AM Grimsby, IL Hourly Weather - Mostly Clear - 10:00 AM Grimsby, IL Hourly Weather - Mostly Clear - 11:00 AM
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Clear Mostly Clear Mostly Clear
80°F27°C 82°F28°C 82°F28°C 83°F28°C 83°F28°C 81°F27°C 79°F26°C 77°F25°C 75°F24°C 73°F23°C 71°F22°C 70°F21°C 69°F21°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 72°F22°C 76°F24°C 80°F27°C 83°F28°C
- - Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain - - - - - - - - - -
15% 15% 35% 35% 35% 35% 35% 35% 35% 35% 35% 35% 35% 35% 14% 14% 14% 14% 14% 14% 14% 14% 14% 14%
71°F22°C 71°F22°C 70°F21°C 70°F21°C 69°F21°C 70°F21°C 70°F21°C 71°F22°C 70°F21°C 70°F21°C 69°F21°C 69°F21°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 69°F21°C 71°F22°C 72°F22°C 71°F22°C
74% 69% 67% 65% 63% 69% 74% 82% 84% 90% 93% 97% 97% 100% 100% 100% 100% 100% 100% 100% 90% 85% 77% 67%
SE S S S S S S S S S S S S S SSE SSE SW SSE SSE S SSE SW SW SSW
4 mph 4 mph 4 mph 5 mph 5 mph 5 mph 3 mph 3 mph 3 mph 4 mph 4 mph 4 mph 3 mph 3 mph 3 mph 2 mph 2 mph 2 mph 3 mph 3 mph 3 mph 5 mph 5 mph 5 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 3 mi5 km .75 mi1 km .75 mi1 km .5 mi1 km .5 mi1 km .5 mi1 km .25 mi0 km .25 mi0 km .75 mi1 km 5 mi8 km 10 mi16 km 10 mi16 km
Hour (CDT)
Weather
Clouds
Temperature
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POP
Dewpoint
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POP = Probability of Precipitation. ** Indicates missing data/values from KMDH model statistics.

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Prob Precip % = Probability of Precipitation.

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

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