10-day forecast for Castleton, IL: 55° to 90°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
90°
Best day: Sunday, August 9
72° · 0.28 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0990° / 66°0.01
Morning74°feels 75°
Afternoon86°feels 94°
Evening83°feels 91°
Overnight67°feels 68°
90 °
Castleton, Sunday, 9 August
Light rain. High 90°, low 66°.
Pressure29.91 inHg
Wind11.6 mph SW
Humidity70%
Visibility6.2 mi
Dew point75°
Mon, 1087° / 75°0
Morning75°feels 76°
Afternoon87°feels 96°
Evening80°feels 85°
Overnight78°feels 79°
87 °
Castleton, Monday, 10 August
Overcast. High 87°, low 75°.
Pressure29.91 inHg
Wind9.1 mph SW
Humidity70%
Visibility6.2 mi
Dew point73°
Tue, 1188° / 72°0
Morning74°feels 75°
Afternoon86°feels 94°
Evening80°feels 80°
Overnight76°feels 77°
88 °
Castleton, Tuesday, 11 August
Overcast. High 88°, low 72°.
Pressure29.77 inHg
Wind13.9 mph S
Humidity72%
Visibility6.2 mi
Dew point70°
Wed, 1278° / 69°0.06
Morning71°feels 72°
Afternoon71°feels 72°
Evening76°feels 77°
Overnight72°feels 73°
78 °
Castleton, Wednesday, 12 August
Light rain. High 78°, low 69°.
Pressure29.88 inHg
Wind8.1 mph E
Humidity83%
Visibility6.2 mi
Dew point69°
Thu, 1372° / 65°0.28
Morning67°feels 68°
Afternoon70°feels 71°
Evening69°feels 69°
Overnight65°feels 65°
72 °
Castleton, Thursday, 13 August
Rain. High 72°, low 65°.
Pressure29.91 inHg
Wind11.4 mph NE
Humidity91%
Visibility—
Dew point67°
Fri, 1474° / 55°0
Morning60°feels 60°
Afternoon72°feels 72°
Evening68°feels 68°
Overnight60°feels 60°
74 °
Castleton, Friday, 14 August
Clear. High 74°, low 55°.
Pressure30.18 inHg
Wind7.3 mph NE
Humidity63%
Visibility—
Dew point57°
Sat, 1574° / 56°0
Morning61°feels 61°
Afternoon72°feels 72°
Evening67°feels 67°
Overnight60°feels 59°
74 °
Castleton, Saturday, 15 August
Overcast. High 74°, low 56°.
Pressure30.30 inHg
Wind7.8 mph SE
Humidity60%
Visibility—
Dew point56°
Sun, 1678° / 57°0
Morning61°feels 61°
Afternoon72°feels 73°
Evening71°feels 71°
Overnight67°feels 67°
78 °
Castleton, Sunday, 16 August
Overcast. High 78°, low 57°.
Pressure30.18 inHg
Wind10.8 mph S
Humidity70%
Visibility—
Dew point60°
Mon, 1780° / 66°0.01
Morning70°feels 71°
Afternoon77°feels 79°
Evening77°feels 78°
Overnight72°feels 73°
80 °
Castleton, Monday, 17 August
Light rain. High 80°, low 66°.
Pressure29.97 inHg
Wind7.4 mph SE
Humidity84%
Visibility—
Dew point71°
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 Castleton, 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.