10-day forecast for Illiopolis, IL: 28° to 69°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
69°
Best day: Friday, November 20
45°
Worst day: Friday, November 13
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 1345° / 35°0
Morning39°feels 32°
Afternoon44°feels 39°
Evening39°feels 34°
Overnight37°feels 30°
45 °
Illiopolis, Friday, 13 November
Overcast. High 45°, low 35°.
Pressure30.09 inHg
Wind12 mph N
Humidity59%
Visibility6.2 mi
Dew point25°
Sat, 1446° / 29°0
Morning32°feels 27°
Afternoon46°feels 45°
Evening35°feels 32°
Overnight31°feels 26°
46 °
Illiopolis, Saturday, 14 November
Clear. High 46°, low 29°.
Pressure30.33 inHg
Wind4.4 mph N
Humidity57%
Visibility6.2 mi
Dew point27°
Sun, 1548° / 28°0
Morning33°feels 30°
Afternoon48°feels 46°
Evening36°feels 36°
Overnight31°feels 31°
48 °
Illiopolis, Sunday, 15 November
Overcast. High 48°, low 28°.
Pressure30.47 inHg
Wind3.6 mph NW
Humidity53%
Visibility6.2 mi
Dew point27°
Mon, 1651° / 29°0
Morning35°feels 35°
Afternoon49°feels 49°
Evening42°feels 42°
Overnight31°feels 31°
51 °
Illiopolis, Monday, 16 November
Clear. High 51°, low 29°.
Pressure30.50 inHg
Wind3.2 mph SE
Humidity49%
Visibility—
Dew point29°
Tue, 1754° / 30°0
Morning37°feels 33°
Afternoon51°feels 48°
Evening44°feels 41°
Overnight40°feels 36°
54 °
Illiopolis, Tuesday, 17 November
Clear. High 54°, low 30°.
Pressure30.50 inHg
Wind5.9 mph S
Humidity46%
Visibility—
Dew point29°
Wed, 1861° / 39°0
Morning45°feels 40°
Afternoon58°feels 55°
Evening51°feels 48°
Overnight47°feels 43°
61 °
Illiopolis, Wednesday, 18 November
Clear. High 61°, low 39°.
Pressure30.33 inHg
Wind12.4 mph S
Humidity33%
Visibility—
Dew point27°
Thu, 1963° / 44°0
Morning49°feels 45°
Afternoon61°feels 58°
Evening56°feels 53°
Overnight53°feels 50°
63 °
Illiopolis, Thursday, 19 November
Overcast. High 63°, low 44°.
Pressure30.18 inHg
Wind16.8 mph S
Humidity33%
Visibility—
Dew point30°
Fri, 2069° / 48°0
Morning53°feels 50°
Afternoon66°feels 64°
Evening62°feels 61°
Overnight56°feels 54°
69 °
Illiopolis, Friday, 20 November
Mostly clear. High 69°, low 48°.
Pressure30.15 inHg
Wind11.7 mph S
Humidity49%
Visibility—
Dew point44°
Sat, 2168° / 52°0
Morning56°feels 55°
Afternoon67°feels 65°
Evening59°feels 58°
Overnight57°feels 55°
68 °
Illiopolis, Saturday, 21 November
Clear. High 68°, low 52°.
Pressure30.12 inHg
Wind12.2 mph S
Humidity41%
Visibility—
Dew point42°
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.