Grimsby, IL 14 Day Weather - WeatherWorld.com
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Grimsby, IL Weather Forecast


Grimsby, IL Weather Forecast Dated: 921 PM Sat Sep 05 2026
Expect a hot stretch with plenty of sunshine and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate. Isolated storms at times.
Saturday, September 5, 2026
Mid-Morning
86°F 30°C
Sunny
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
92°F 34°C
Sunny
Scorching heat reaching 102°F 39°C, feeling like 112°F 45°C, sunny throughout the day, with lower humidity and steady pressure. Winds picking up from NNW at 2 mph 4 km/h to SSE at 12 mph 19 km/h.
Sunday, September 6, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
94°F 35°C
Sunny
Early-Evening
85°F 30°C
Sunny
Hot and sweltering around 94°F 35°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds blowing from the NNE at 13 mph 20 km/h. Gusts up to 20 mph 33 km/h.
Monday, September 7, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
93°F 34°C
Sunny
Early-Evening
83°F 28°C
Sunny
Sizzling hot with 93°F 34°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the ENE to the NE at 8 mph 12 km/h.
Tuesday, September 8, 2026
Mid-Morning
78°F 26°C
Sunny
Mid-Afternoon
99°F 37°C
Sunny
Early-Evening
91°F 33°C
Sunny
Hot temperatures near 99°F 37°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds swinging from the S to the SSE at 7 mph 12 km/h.
Wednesday, September 9, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
105°F 41°C
Sunny
Early-Evening
91°F 33°C
Sunny
Scorching hot near 105°F 41°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling. Winds shifting from the SSW to the NW at 11 mph 18 km/h. Gusts up to 20 mph 32 km/h.
Thursday, September 10, 2026
Mid-Morning
72°F 22°C
Light Showers
Mid-Afternoon
83°F 28°C
Light Showers
Early-Evening
81°F 27°C
Scattered Showers
Very warm near 83°F 28°C, though humidity makes it feel like 86°F 30°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds turning from the WSW to the SE at 8 mph 13 km/h.
Friday, September 11, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
81°F 28°C
Sunny
Hot and sweltering around 91°F 33°C, sunny throughout the day, with lower humidity and steady pressure. Winds switching from the ENE to the E at 7 mph 11 km/h.
Saturday, September 12, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
94°F 35°C
Sunny
Early-Evening
86°F 30°C
Sunny
Sizzling hot with 94°F 35°C, sunny throughout the day, with lower humidity and steady pressure. Winds blowing from the S at 9 mph 14 km/h.
Sunday, September 13, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
91°F 33°C
Cloudy
Early-Evening
82°F 28°C
Overcast
Very hot with a high of 91°F 33°C, feeling closer to 95°F 35°C in the humidity, sunny in the morning, overcast in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds swinging from the SSW to the SSE at 6 mph 10 km/h.
Monday, September 14, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
87°F 30°C
Partly Cloudy
Early-Evening
80°F 27°C
Light Showers
Warm and summery around 87°F 30°C (feels like 91°F 33°C), drier conditions through late afternoon before showers move in, with steady humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
93°F 34°C
Partly Cloudy
Early-Evening
85°F 30°C
Scattered Showers
Hot and sweltering around 93°F 34°C (heat index 98°F 37°C), scattered downpours possible, with steady humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
101°F 39°C
Sunny
Early-Evening
82°F 28°C
Nearby Thunderstorms
Dangerously hot with a high of 101°F 39°C (heat index near 105°F 41°C), heavy thunderstorms conditions at times, with increasing humidity and steady pressure. A stray shower or storm late in the day. Winds shifting from the SW to the ESE at 12 mph 19 km/h. Gusts up to 22 mph 35 km/h.
Thursday, September 17, 2026
Mid-Morning
78°F 26°C
Light Showers
Mid-Afternoon
97°F 36°C
Overcast
Early-Evening
87°F 31°C
Nearby Thunderstorms
Sizzling hot near 97°F 36°C with a heat index reaching 102°F 39°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds blowing from the SSE at 4 mph 6 km/h.
Friday, September 18, 2026
Mid-Morning
83°F 28°C
Cloudy
Mid-Afternoon
99°F 37°C
Sunny
Early-Evening
91°F 33°C
Sunny
Hot and sweltering around 99°F 37°C (heat index 102°F 39°C), partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
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