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


Grantfork, IL Weather Forecast Dated: 753 AM Wed Sep 02 2026 (Grantfork Time)
Expect a hot stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 2, 2026
Mid-Morning
87°F 30°C
Sunny
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
93°F 34°C
Cloudy
Scorching hot near 100°F 38°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds turning from the SW to the SSW at 8 mph 12 km/h.
Thursday, September 3, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
99°F 37°C
Partly Cloudy
Early-Evening
92°F 33°C
Partly Cloudy
Hot and sweltering around 99°F 37°C (heat index 102°F 39°C), sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the SW to the SSW at 9 mph 14 km/h.
Friday, September 4, 2026
Mid-Morning
86°F 30°C
Sunny
Mid-Afternoon
100°F 38°C
Partly Cloudy
Early-Evening
93°F 34°C
Overcast
Dangerously hot with a high of 100°F 38°C (heat index near 103°F 39°C), sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds moving from the W to the SSW at 6 mph 9 km/h.
Saturday, September 5, 2026
Mid-Morning
87°F 31°C
Overcast
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
88°F 31°C
Sunny
Dangerously hot with a high of 102°F 39°C, overcast in the morning, sunny in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds swinging from the WNW to the SE at 9 mph 14 km/h.
Sunday, September 6, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
90°F 32°C
Overcast
Early-Evening
86°F 30°C
Overcast
Hot and sweltering around 90°F 32°C (heat index 93°F 34°C), sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds blowing from the WSW at 6 mph 9 km/h.
Monday, September 7, 2026
Mid-Morning
80°F 27°C
Sunny
Mid-Afternoon
94°F 35°C
Cloudy
Early-Evening
85°F 29°C
Overcast
Very hot with a high of 94°F 35°C, feeling closer to 97°F 36°C in the humidity, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds turning from the SE to the SW at 10 mph 16 km/h.
Tuesday, September 8, 2026
Mid-Morning
79°F 26°C
Scattered Showers
Mid-Afternoon
94°F 34°C
Overcast
Early-Evening
80°F 27°C
Overcast
Sizzling hot near 94°F 34°C with a heat index reaching 99°F 37°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds switching from the SW to the NNE at 14 mph 22 km/h. Gusts up to 21 mph 34 km/h.
Wednesday, September 9, 2026
Mid-Morning
69°F 21°C
Partly Cloudy
Mid-Afternoon
92°F 33°C
Cloudy
Early-Evening
91°F 33°C
Sunny
Hot and sweltering around 92°F 33°C (heat index 96°F 35°C), cloudy in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds blowing from the S at 8 mph 12 km/h.
Thursday, September 10, 2026
Mid-Morning
92°F 34°C
Sunny
Mid-Afternoon
106°F 41°C
Sunny
Early-Evening
101°F 38°C
Sunny
Scorching hot near 106°F 41°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling. Winds swinging from the SW to the SSW at 18 mph 29 km/h. Gusts up to 33 mph 52 km/h.
Friday, September 11, 2026
Mid-Morning
82°F 28°C
Scattered Showers
Mid-Afternoon
89°F 32°C
Partly Cloudy
Early-Evening
81°F 27°C
Sunny
Very warm with a high of 89°F 32°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
68°F 20°C
Light Showers
Mid-Afternoon
87°F 30°C
Sunny
Early-Evening
81°F 27°C
Overcast
Quite warm reaching 87°F 30°C, feeling like 92°F 33°C during peak afternoon, scattered morning showers before drying out later, with lower humidity and steady pressure. Winds out of the ENE at 9 mph 15 km/h. Gusts up to 22 mph 36 km/h.
Sunday, September 13, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
96°F 35°C
Partly Cloudy
Early-Evening
89°F 32°C
Overcast
Very hot with a high of 96°F 35°C, feeling closer to 100°F 38°C in the humidity, cloudy throughout the day, with lower humidity and steady pressure.
Monday, September 14, 2026
Mid-Morning
85°F 29°C
Overcast
Mid-Afternoon
103°F 39°C
Sunny
Early-Evening
94°F 35°C
Partly Cloudy
Scorching hot near 103°F 39°C, cloudy in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds turning from the SW to the WSW at 5 mph 8 km/h.
Tuesday, September 15, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
98°F 37°C
Partly Cloudy
Early-Evening
91°F 33°C
Sunny
Hot and sweltering around 98°F 37°C (heat index 102°F 39°C), sunny throughout the day, with lower humidity and barometric pressure falling. Winds switching from the ENE to the E at 7 mph 11 km/h.
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