10-day forecast for Summit, IL: 44° to 72°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
72°
Best day: Saturday, October 24
56°
Worst day: Monday, October 26
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1963° / 45°0
Morning45°feels 43°
Afternoon62°feels 61°
Evening53°feels 52°
Overnight49°feels 47°
63 °
Summit, Monday, 19 October
Clear. High 63°, low 45°.
Pressure30.39 inHg
Wind2.8 mph SW
Humidity61%
Visibility6.2 mi
Dew point46°
Tue, 2064° / 44°0
Morning46°feels 46°
Afternoon63°feels 62°
Evening54°feels 52°
Overnight48°feels 48°
64 °
Summit, Tuesday, 20 October
Clear. High 64°, low 44°.
Pressure30.42 inHg
Wind3.1 mph SE
Humidity60%
Visibility6.2 mi
Dew point47°
Wed, 2166° / 44°0
Morning48°feels 48°
Afternoon65°feels 64°
Evening57°feels 56°
Overnight49°feels 48°
66 °
Summit, Wednesday, 21 October
Clear. High 66°, low 44°.
Pressure30.30 inHg
Wind2.9 mph SW
Humidity62%
Visibility6.2 mi
Dew point48°
Thu, 2265° / 49°0.04
Morning54°feels 53°
Afternoon64°feels 63°
Evening58°feels 57°
Overnight51°feels 49°
65 °
Summit, Thursday, 22 October
Light rain. High 65°, low 49°.
Pressure30.27 inHg
Wind6.4 mph NE
Humidity61%
Visibility—
Dew point49°
Fri, 2368° / 51°0
Morning55°feels 54°
Afternoon65°feels 63°
Evening65°feels 63°
Overnight62°feels 60°
68 °
Summit, Friday, 23 October
Mostly clear. High 68°, low 51°.
Pressure30.36 inHg
Wind6.6 mph E
Humidity55%
Visibility—
Dew point46°
Sat, 2472° / 59°0
Morning62°feels 60°
Afternoon70°feels 68°
Evening68°feels 66°
Overnight65°feels 63°
72 °
Summit, Saturday, 24 October
Overcast. High 72°, low 59°.
Pressure30.24 inHg
Wind11.8 mph S
Humidity29%
Visibility—
Dew point35°
Sun, 2564° / 51°0
Morning54°feels 52°
Afternoon51°feels 49°
Evening51°feels 49°
Overnight52°feels 49°
64 °
Summit, Sunday, 25 October
Overcast. High 64°, low 51°.
Pressure30.39 inHg
Wind10 mph SW
Humidity49%
Visibility—
Dew point33°
Mon, 2656° / 45°0
Morning48°feels 47°
Afternoon55°feels 52°
Evening53°feels 49°
Overnight49°feels 47°
56 °
Summit, Monday, 26 October
Clear. High 56°, low 45°.
Pressure30.39 inHg
Wind6.7 mph W
Humidity30%
Visibility—
Dew point23°
Tue, 2760° / 45°0
Morning49°feels 47°
Afternoon58°feels 54°
Evening56°feels 53°
Overnight53°feels 50°
60 °
Summit, Tuesday, 27 October
Overcast. High 60°, low 45°.
Pressure30.33 inHg
Wind6.4 mph SW
Humidity26%
Visibility—
Dew point22°
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 Summit, 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.