National Weather Service forecast
Grand Detour, Illinois Weather
Grand Detour 7-Day Forecast
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Overnight55°FChance Rain Showers33% chance of precipitation
A chance of rain showers. Cloudy. Low around 55, with temperatures rising to around 59 overnight. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
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Wednesday59°FSlight Chance Rain Showers17% chance of precipitation
A slight chance of rain showers. Mostly cloudy. High near 59, with temperatures falling to around 53 in the afternoon. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
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Wednesday Night44°FSlight Chance Rain Showers21% chance of precipitation
A slight chance of rain showers. Cloudy. Low around 44, with temperatures rising to around 46 overnight. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
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Thursday55°FChance Rain Showers52% chance of precipitation
A chance of rain showers. Cloudy, with a high near 55. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
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Thursday Night38°FSlight Chance Rain Showers then Mostly Cloudy21% chance of precipitation
A slight chance of rain showers before midnight. Mostly cloudy, with a low around 38. North northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
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Friday49°FPartly Sunny5% chance of precipitation
Partly sunny, with a high near 49.
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Friday Night30°FPartly Cloudy
Partly cloudy, with a low around 30.
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Saturday51°FSunny
Sunny, with a high near 51.
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Saturday Night31°FMostly Clear1% chance of precipitation
Mostly clear, with a low around 31.
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Sunday56°FSunny4% chance of precipitation
Sunny, with a high near 56.
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Sunday Night33°FMostly Clear
Mostly clear, with a low around 33.
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Monday61°FSunny
Sunny, with a high near 61.
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Monday Night38°FMostly Clear
Mostly clear, with a low around 38.
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Tuesday62°FSunny
Sunny, with a high near 62.
Issued by the National Weather Service (LOT office), updated .
Grand Detour Hourly Forecast
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Grand Detour Weather Radar
Open the full radar for Grand DetourAbout Grand Detour
- Population (2020 Census)
- 424
- Coordinates
- 41.901, -89.413
- Elevation
- 663 ft
- NWS forecast office
- LOT
- Time zone
- America/Chicago
- Sunrise today
- 6:33 AM CST
- Sunset today
- 4:48 PM CST
- Daylight today
- 10 h 15 min
Grand Detour Weather Questions
What is the weather forecast for Grand Detour, Illinois?
Overnight: A chance of rain showers. Cloudy. Low around 55, with temperatures rising to around 59 overnight. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible. Wednesday: A slight chance of rain showers. Mostly cloudy. High near 59, with temperatures falling to around 53 in the afternoon. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Will it rain or snow in Grand Detour this week?
The best chance of precipitation is Thursday at 52%. Periods with a 30% chance or more: Overnight (33%), Thursday (52%).
How warm and how cold will it get in Grand Detour this week?
The warmest day is Tuesday, with a high near 62°F. The coldest night is Friday Night, with a low near 30°F.
What time are sunrise and sunset in Grand Detour today?
Sunrise is at 6:33 AM CST and sunset is at 4:48 PM CST, for 10 h 15 min of daylight.
Weather near Grand Detour
- Lost Nation 2 mi
- Nachusa 5 mi
- Dixon 5 mi
- Franklin Grove 7 mi
- Oregon 9 mi
- Ashton 10 mi
- Mount Morris 10 mi
- Polo 10 mi