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As of 11:13 CDT

Weather in Grand Detour, IL

82°Current weather

Grand Detour, Sunday, 9 August, 11:13

Mostly clear. Feels like 89°. High 87°, low 64°.

Pressure29.94 inHg
Wind4 mph W
Humidity81%
Visibility6.2 mi
Dew point75°

Two-week outlook for Grand Detour, IL: week one averages a high of 80.7° and week two 77°, so week two runs 3.7° cooler than week one. Around 3.6 inches of precipitation are expected over the 14 days, across 7 wet days. The nearest weekend, August 9: 87°, with precipitation.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (August 9 – August 15)80.7°63.5°1.3 in / 5 d—
2nd (August 16 – August 22)77°61.1°2.3 in / 2 d—

Weekend weather

Sun, August 9
Rain
87°64°
0.16 in
Sat, August 15
Light rain
72°60°
0.16 in
Sun, August 16
Rain
74°65°
0.3 in
Sat, August 22
Light rain
79°63°
0.01 in
Mon, 1090° / 72°0.28Rain
90 °Rain

Grand Detour, Monday, 10 August

Rain. High 90°, low 72°.

Pressure29.88 inHg
Wind3.5 mph S
Humidity80%
Visibility6.2 mi
Dew point76°
Tue, 1187° / 65°0.14Light rain
87 °Light rain

Grand Detour, Tuesday, 11 August

Light rain. High 87°, low 65°.

Pressure29.83 inHg
Wind9 mph SW
Humidity73%
Visibility6.2 mi
Dew point75°
Wed, 1284° / 63°0.01Light rain
84 °Light rain

Grand Detour, Wednesday, 12 August

Light rain. High 84°, low 63°.

Pressure29.88 inHg
Wind3.9 mph NE
Humidity68%
Visibility6.2 mi
Dew point68°
Thu, 1371° / 62°0.57Rain
71 °Rain

Grand Detour, Thursday, 13 August

Rain. High 71°, low 62°.

Pressure29.94 inHg
Wind11.7 mph E
Humidity89%
Visibility—
Dew point66°
Fri, 1474° / 58°0Overcast
74 °Overcast

Grand Detour, Friday, 14 August

Overcast. High 74°, low 58°.

Pressure30.12 inHg
Wind13.2 mph E
Humidity65%
Visibility—
Dew point59°
Sat, 1572° / 60°0.16Light rain
72 °Light rain

Grand Detour, Saturday, 15 August

Light rain. High 72°, low 60°.

Pressure30.18 inHg
Wind17 mph SE
Humidity73%
Visibility—
Dew point61°
Sun, 1674° / 65°0.3Rain
74 °Rain

Grand Detour, Sunday, 16 August

Rain. High 74°, low 65°.

Pressure30.03 inHg
Wind13.9 mph NW
Humidity78%
Visibility—
Dew point65°
Mon, 1774° / 58°0Overcast
74 °Overcast

Grand Detour, Monday, 17 August

Overcast. High 74°, low 58°.

Pressure30.12 inHg
Wind6.8 mph N
Humidity71%
Visibility—
Dew point60°
Tue, 1878° / 59°0Overcast
78 °Overcast

Grand Detour, Tuesday, 18 August

Overcast. High 78°, low 59°.

Pressure29.85 inHg
Wind9.4 mph S
Humidity72%
Visibility—
Dew point64°
Wed, 1976° / 62°0Partly cloudy
76 °Partly cloudy

Grand Detour, Wednesday, 19 August

Partly cloudy. High 76°, low 62°.

Pressure29.85 inHg
Wind14 mph NW
Humidity66%
Visibility—
Dew point62°
Thu, 2077° / 59°0.02Light rain
77 °Light rain

Grand Detour, Thursday, 20 August

Light rain. High 77°, low 59°.

Pressure29.94 inHg
Wind11.2 mph W
Humidity71%
Visibility—
Dew point62°
Fri, 2181° / 61°1.93Heavy rain
81 °Heavy rain

Grand Detour, Friday, 21 August

Heavy rain. High 81°, low 61°.

Pressure29.80 inHg
Wind14 mph S
Humidity64%
Visibility—
Dew point63°
Sat, 2279° / 63°0.01Light rain
79 °Light rain

Grand Detour, Saturday, 22 August

Light rain. High 79°, low 63°.

Pressure29.83 inHg
Wind13.9 mph NW
Humidity64%
Visibility—
Dew point64°

About this forecast

Can I plan a trip on a 2-week forecast?

Week one is solid for planning — accuracy is high. Week two shows the trend: go by the averages and the comparison with normal, and check the details closer to the date.

What does the "Vs normal" column mean?

It is the gap between the forecast and the climate normal for those same dates in Grand Detour, IL, computed over 60 years. A positive value means the week runs warmer than usual.

Why are weekends shown separately?

Saturday and Sunday plans are what people check most, so we give them their own cards with temperature and precipitation.