10-day forecast for Granite City, IL: 66° to 103°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
103°
Best day: Monday, August 10
95° · 0.14 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 10103° / 75°0
Morning79°feels 79°
Afternoon102°feels 107°
Evening89°feels 89°
Overnight82°feels 86°
103 °
Granite City, Monday, 10 August
Mostly clear. High 103°, low 75°.
Pressure29.94 inHg
Wind10.5 mph SW
Humidity40%
Visibility6.2 mi
Dew point68°
Tue, 11102° / 79°0
Morning82°feels 85°
Afternoon101°feels 105°
Evening92°feels 93°
Overnight79°feels 79°
102 °
Granite City, Tuesday, 11 August
Light rain. High 102°, low 79°.
Pressure29.91 inHg
Wind7.4 mph SW
Humidity43%
Visibility6.2 mi
Dew point68°
Wed, 1297° / 77°0.04
Morning80°feels 80°
Afternoon87°feels 93°
Evening85°feels 94°
Overnight87°feels 88°
97 °
Granite City, Wednesday, 12 August
Light rain. High 97°, low 77°.
Pressure29.83 inHg
Wind5.6 mph NW
Humidity52%
Visibility6.2 mi
Dew point70°
Thu, 1395° / 73°0.14
Morning74°feels 75°
Afternoon89°feels 95°
Evening85°feels 91°
Overnight81°feels 84°
95 °
Granite City, Thursday, 13 August
Light rain. High 95°, low 73°.
Pressure29.88 inHg
Wind15.1 mph SE
Humidity61%
Visibility6.2 mi
Dew point71°
Fri, 1489° / 72°0
Morning76°feels 79°
Afternoon87°feels 94°
Evening80°feels 85°
Overnight75°feels 77°
89 °
Granite City, Friday, 14 August
Overcast. High 89°, low 72°.
Pressure29.97 inHg
Wind13.6 mph E
Humidity61%
Visibility—
Dew point71°
Sat, 1598° / 71°0
Morning78°feels 81°
Afternoon93°feels 101°
Evening86°feels 96°
Overnight79°feels 84°
98 °
Granite City, Saturday, 15 August
Partly cloudy. High 98°, low 71°.
Pressure30.06 inHg
Wind12.3 mph E
Humidity47%
Visibility—
Dew point68°
Sun, 1694° / 77°0
Morning84°feels 87°
Afternoon89°feels 97°
Evening82°feels 87°
Overnight78°feels 79°
94 °
Granite City, Sunday, 16 August
Clear. High 94°, low 77°.
Pressure30.00 inHg
Wind12.5 mph N
Humidity56%
Visibility—
Dew point71°
Mon, 1783° / 66°0
Morning70°feels 71°
Afternoon81°feels 82°
Evening77°feels 77°
Overnight72°feels 72°
83 °
Granite City, Monday, 17 August
Overcast. High 83°, low 66°.
Pressure30.09 inHg
Wind8.5 mph NE
Humidity49%
Visibility—
Dew point59°
Tue, 18101° / 67°0.13
Morning74°feels 76°
Afternoon91°feels 95°
Evening89°feels 96°
Overnight76°feels 77°
101 °
Granite City, Tuesday, 18 August
Light rain. High 101°, low 67°.
Pressure29.83 inHg
Wind10.4 mph S
Humidity44%
Visibility—
Dew point63°
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 Granite City, 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.