10-day forecast for Summit, IL: 38° to 75°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.
75°
Best day: Friday, October 23
65° · 0.11 in
Worst day: Thursday, October 15
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 1663° / 47°0.03
Morning51°feels 49°
Afternoon56°feels 55°
Evening51°feels 48°
Overnight60°feels 60°
63 °
Summit, Friday, 16 October
Light rain. High 63°, low 47°.
Pressure30.06 inHg
Wind12.2 mph NW
Humidity70%
Visibility6.2 mi
Dew point43°
Sat, 1757° / 38°0
Morning40°feels 35°
Afternoon54°feels 51°
Evening47°feels 44°
Overnight41°feels 36°
57 °
Summit, Saturday, 17 October
Clear. High 57°, low 38°.
Pressure30.53 inHg
Wind4.6 mph W
Humidity53%
Visibility6.2 mi
Dew point35°
Sun, 1860° / 42°0
Morning43°feels 38°
Afternoon59°feels 57°
Evening51°feels 49°
Overnight44°feels 39°
60 °
Summit, Sunday, 18 October
Clear. High 60°, low 42°.
Pressure30.47 inHg
Wind10.7 mph SW
Humidity58%
Visibility6.2 mi
Dew point42°
Mon, 1962° / 43°0
Morning46°feels 44°
Afternoon61°feels 60°
Evening54°feels 52°
Overnight47°feels 44°
62 °
Summit, Monday, 19 October
Clear. High 62°, low 43°.
Pressure30.39 inHg
Wind4.2 mph S
Humidity60%
Visibility6.2 mi
Dew point44°
Tue, 2065° / 43°0
Morning49°feels 49°
Afternoon63°feels 62°
Evening56°feels 55°
Overnight52°feels 51°
65 °
Summit, Tuesday, 20 October
Clear. High 65°, low 43°.
Pressure30.36 inHg
Wind4 mph E
Humidity50%
Visibility—
Dew point43°
Wed, 2169° / 46°0
Morning52°feels 51°
Afternoon66°feels 65°
Evening64°feels 62°
Overnight58°feels 56°
69 °
Summit, Wednesday, 21 October
Mostly clear. High 69°, low 46°.
Pressure30.30 inHg
Wind3.9 mph S
Humidity45%
Visibility—
Dew point42°
Thu, 2273° / 56°0
Morning60°feels 58°
Afternoon70°feels 69°
Evening67°feels 65°
Overnight63°feels 61°
73 °
Summit, Thursday, 22 October
Overcast. High 73°, low 56°.
Pressure30.27 inHg
Wind5.6 mph SW
Humidity29%
Visibility—
Dew point35°
Fri, 2375° / 59°0
Morning63°feels 61°
Afternoon73°feels 71°
Evening69°feels 67°
Overnight65°feels 63°
75 °
Summit, Friday, 23 October
Partly cloudy. High 75°, low 59°.
Pressure30.21 inHg
Wind6.9 mph SE
Humidity25%
Visibility—
Dew point34°
Sat, 2471° / 59°0
Morning62°feels 60°
Afternoon69°feels 67°
Evening66°feels 64°
Overnight63°feels 61°
71 °
Summit, Saturday, 24 October
Overcast. High 71°, low 59°.
Pressure30.24 inHg
Wind6.4 mph S
Humidity27%
Visibility—
Dew point33°
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.