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As of 17:01 CDT

Weather in Grand Detour, IL

82°Current weather

Grand Detour, Sunday, 9 August, 17:01

Partly cloudy. Feels like 87°. High 82°, low 64°.

Pressure29.83 inHg
Wind5 mph N
Humidity75%
Visibility6.2 mi
Dew point74°

10-day forecast for Grand Detour, IL: 61° to 89°, with precipitation expected on 7 days. The table below breaks each day into morning, afternoon, evening and overnight.

84°
Best day: Tuesday, August 18
77° · 0.74 in
Worst day: Thursday, August 13

Tap any day below to see morning, afternoon, evening and overnight.

Mon, 1088° / 72°0.17Rain
MorningOvercast76°feels 78°
AfternoonOvercast87°feels 100°
EveningRain77°feels 79°
OvernightClear74°feels 75°
88 °Rain

Grand Detour, Monday, 10 August

Rain. High 88°, low 72°.

Pressure29.88 inHg
Wind6.2 mph E
Humidity78%
Visibility6.2 mi
Dew point75°
Tue, 1187° / 69°0.18Rain
MorningOvercast74°feels 75°
AfternoonOvercast73°feels 75°
EveningClear76°feels 78°
OvernightLight rain71°feels 72°
87 °Rain

Grand Detour, Tuesday, 11 August

Rain. High 87°, low 69°.

Pressure29.83 inHg
Wind5.9 mph N
Humidity94%
Visibility6.2 mi
Dew point69°
Wed, 1282° / 65°0Partly cloudy
MorningClear70°feels 71°
AfternoonOvercast82°feels 86°
EveningClear73°feels 74°
OvernightClear67°feels 68°
82 °Partly cloudy

Grand Detour, Wednesday, 12 August

Partly cloudy. High 82°, low 65°.

Pressure29.91 inHg
Wind2.8 mph E
Humidity69%
Visibility6.2 mi
Dew point69°
Thu, 1377° / 64°0.74Rain
MorningOvercast67°feels 68°
AfternoonRain75°feels 76°
EveningRain67°feels 68°
OvernightOvercast66°feels 66°
77 °Rain

Grand Detour, Thursday, 13 August

Rain. High 77°, low 64°.

Pressure29.94 inHg
Wind9.9 mph SE
Humidity67%
Visibility6.2 mi
Dew point65°
Fri, 1476° / 67°0.44Rain
MorningRain70°feels 71°
AfternoonRain75°feels 76°
EveningRain73°feels 74°
OvernightRain69°feels 71°
76 °Rain

Grand Detour, Friday, 14 August

Rain. High 76°, low 67°.

Pressure30.03 inHg
Wind16.6 mph E
Humidity81%
Visibility—
Dew point68°
Sat, 1589° / 69°0.26Rain
MorningRain75°feels 79°
AfternoonRain85°feels 96°
EveningRain83°feels 91°
OvernightRain77°feels 78°
89 °Rain

Grand Detour, Saturday, 15 August

Rain. High 89°, low 69°.

Pressure29.88 inHg
Wind14.1 mph E
Humidity73%
Visibility—
Dew point74°
Sun, 1674° / 68°0Light rain
MorningLight rain69°feels 69°
AfternoonLight rain71°feels 72°
EveningLight rain71°feels 72°
OvernightLight rain68°feels 69°
74 °Light rain

Grand Detour, Sunday, 16 August

Light rain. High 74°, low 68°.

Pressure30.00 inHg
Wind12.9 mph NW
Humidity82%
Visibility—
Dew point65°
Mon, 1773° / 61°0.04Light rain
MorningLight rain65°feels 65°
AfternoonLight rain69°feels 70°
EveningLight rain69°feels 71°
OvernightLight rain69°feels 69°
73 °Light rain

Grand Detour, Monday, 17 August

Light rain. High 73°, low 61°.

Pressure29.97 inHg
Wind13 mph E
Humidity88%
Visibility—
Dew point64°
Tue, 1884° / 70°0.01Light rain
MorningLight rain74°feels 76°
AfternoonLight rain83°feels 89°
EveningLight rain79°feels 79°
OvernightLight rain72°feels 74°
84 °Light rain

Grand Detour, Tuesday, 18 August

Light rain. High 84°, low 70°.

Pressure29.88 inHg
Wind11.5 mph W
Humidity73%
Visibility—
Dew point72°

About this forecast

How reliable is a 10-day forecast?

The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.

What does the time-of-day table show?

Temperature in Grand Detour, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.

How is the best day chosen?

We weigh the daytime high against precipitation: a warm, dry day scores highest.