10-day forecast for Illiopolis, IL: 42° to 76°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.
76°
Best day: Thursday, October 29
68° · 0.81 in
Worst day: Tuesday, November 3
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 3073° / 53°0
Morning54°feels 53°
Afternoon72°feels 72°
Evening63°feels 62°
Overnight57°feels 56°
73 °
Illiopolis, Friday, 30 October
Overcast. High 73°, low 53°.
Pressure30.27 inHg
Wind9.1 mph E
Humidity49%
Visibility6.2 mi
Dew point47°
Sat, 3169° / 58°0
Morning58°feels 57°
Afternoon69°feels 67°
Evening62°feels 61°
Overnight59°feels 57°
69 °
Illiopolis, Saturday, 31 October
Overcast. High 69°, low 58°.
Pressure30.30 inHg
Wind5.6 mph SE
Humidity45%
Visibility6.2 mi
Dew point44°
Sun, 0168° / 58°0.06
Morning59°feels 59°
Afternoon68°feels 67°
Evening64°feels 63°
Overnight60°feels 59°
68 °
Illiopolis, Sunday, 1 November
Light rain. High 68°, low 58°.
Pressure30.30 inHg
Wind10.8 mph SE
Humidity69%
Visibility6.2 mi
Dew point56°
Mon, 0266° / 57°0.01
Morning58°feels 57°
Afternoon65°feels 64°
Evening65°feels 65°
Overnight58°feels 58°
66 °
Illiopolis, Monday, 2 November
Light rain. High 66°, low 57°.
Pressure30.12 inHg
Wind10.7 mph S
Humidity79%
Visibility6.2 mi
Dew point56°
Tue, 0368° / 64°0.81
Morning65°feels 64°
Afternoon65°feels 66°
Evening66°feels 67°
Overnight65°feels 65°
68 °
Illiopolis, Tuesday, 3 November
Rain. High 68°, low 64°.
Pressure29.85 inHg
Wind18.3 mph S
Humidity90%
Visibility—
Dew point62°
Wed, 0467° / 61°0.7
Morning62°feels 62°
Afternoon66°feels 66°
Evening62°feels 62°
Overnight61°feels 61°
67 °
Illiopolis, Wednesday, 4 November
Rain. High 67°, low 61°.
Pressure29.74 inHg
Wind14.8 mph S
Humidity75%
Visibility—
Dew point58°
Thu, 0561° / 50°0.08
Morning55°feels 53°
Afternoon59°feels 57°
Evening54°feels 52°
Overnight51°feels 49°
61 °
Illiopolis, Thursday, 5 November
Light rain. High 61°, low 50°.
Pressure29.74 inHg
Wind16.4 mph N
Humidity53%
Visibility—
Dew point42°
Fri, 0654° / 42°0
Morning45°feels 40°
Afternoon51°feels 48°
Evening47°feels 45°
Overnight44°feels 41°
54 °
Illiopolis, Friday, 6 November
Clear. High 54°, low 42°.
Pressure30.09 inHg
Wind10.1 mph N
Humidity32%
Visibility—
Dew point22°
Sat, 0760° / 43°0
Morning48°feels 44°
Afternoon59°feels 56°
Evening53°feels 51°
Overnight50°feels 47°
60 °
Illiopolis, Saturday, 7 November
Overcast. High 60°, low 43°.
Pressure30.15 inHg
Wind9.2 mph S
Humidity30%
Visibility—
Dew point26°
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 Illiopolis, 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.