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
58° · 0.05 in
Worst day: Friday, October 16
Tap any day below to see morning, afternoon, evening and overnight.
Sat, 1755° / 38°0
Morning40°feels 35°
Afternoon54°feels 52°
Evening47°feels 45°
Overnight45°feels 40°
55 °
Summit, Saturday, 17 October
Clear. High 55°, low 38°.
Pressure30.53 inHg
Wind4.2 mph SW
Humidity56%
Visibility6.2 mi
Dew point37°
Sun, 1861° / 43°0
Morning44°feels 39°
Afternoon60°feels 58°
Evening52°feels 50°
Overnight44°feels 40°
61 °
Summit, Sunday, 18 October
Clear. High 61°, low 43°.
Pressure30.45 inHg
Wind10.9 mph SW
Humidity58%
Visibility6.2 mi
Dew point42°
Mon, 1963° / 43°0
Morning44°feels 42°
Afternoon63°feels 61°
Evening54°feels 53°
Overnight47°feels 44°
63 °
Summit, Monday, 19 October
Clear. High 63°, low 43°.
Pressure30.42 inHg
Wind4.7 mph S
Humidity59%
Visibility6.2 mi
Dew point45°
Tue, 2064° / 45°0
Morning49°feels 49°
Afternoon64°feels 63°
Evening55°feels 53°
Overnight48°feels 48°
64 °
Summit, Tuesday, 20 October
Mostly clear. High 64°, low 45°.
Pressure30.39 inHg
Wind2.3 mph SE
Humidity57%
Visibility6.2 mi
Dew point46°
Wed, 2167° / 47°0
Morning53°feels 51°
Afternoon65°feels 64°
Evening59°feels 58°
Overnight53°feels 52°
67 °
Summit, Wednesday, 21 October
Clear. High 67°, low 47°.
Pressure30.27 inHg
Wind4.5 mph SW
Humidity53%
Visibility—
Dew point46°
Thu, 2270° / 50°0
Morning56°feels 55°
Afternoon66°feels 65°
Evening66°feels 64°
Overnight63°feels 61°
70 °
Summit, Thursday, 22 October
Partly cloudy. High 70°, low 50°.
Pressure30.18 inHg
Wind3.3 mph SW
Humidity50%
Visibility—
Dew point45°
Fri, 2375° / 63°0
Morning66°feels 64°
Afternoon73°feels 71°
Evening68°feels 66°
Overnight65°feels 63°
75 °
Summit, Friday, 23 October
Overcast. High 75°, low 63°.
Pressure30.24 inHg
Wind5.1 mph SE
Humidity26%
Visibility—
Dew point35°
Sat, 2473° / 60°0
Morning64°feels 61°
Afternoon71°feels 69°
Evening68°feels 66°
Overnight64°feels 62°
73 °
Summit, Saturday, 24 October
Overcast. High 73°, low 60°.
Pressure30.21 inHg
Wind9.7 mph SW
Humidity25%
Visibility—
Dew point32°
Sun, 2563° / 52°0
Morning55°feels 52°
Afternoon57°feels 55°
Evening53°feels 51°
Overnight53°feels 51°
63 °
Summit, Sunday, 25 October
Overcast. High 63°, low 52°.
Pressure30.36 inHg
Wind10.6 mph NE
Humidity47%
Visibility—
Dew point37°
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.