10-day forecast for Summit, IL: 38° to 79°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
79°
Best day: Friday, October 23
64° · 1.32 in
Worst day: Thursday, October 15
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 1659° / 45°0.04
Morning50°feels 48°
Afternoon55°feels 54°
Evening48°feels 43°
Overnight55°feels 54°
59 °
Summit, Friday, 16 October
Light rain. High 59°, low 45°.
Pressure30.03 inHg
Wind11 mph NW
Humidity69%
Visibility6.2 mi
Dew point43°
Sat, 1754° / 38°0
Morning39°feels 35°
Afternoon53°feels 50°
Evening47°feels 44°
Overnight41°feels 35°
54 °
Summit, Saturday, 17 October
Clear. High 54°, low 38°.
Pressure30.53 inHg
Wind3.4 mph W
Humidity52%
Visibility6.2 mi
Dew point34°
Sun, 1860° / 42°0
Morning45°feels 40°
Afternoon59°feels 57°
Evening52°feels 50°
Overnight44°feels 39°
60 °
Summit, Sunday, 18 October
Clear. High 60°, low 42°.
Pressure30.45 inHg
Wind9.9 mph SW
Humidity58%
Visibility6.2 mi
Dew point41°
Mon, 1961° / 42°0
Morning47°feels 45°
Afternoon59°feels 58°
Evening54°feels 52°
Overnight48°feels 48°
61 °
Summit, Monday, 19 October
Partly cloudy. High 61°, low 42°.
Pressure30.39 inHg
Wind6.7 mph SW
Humidity56%
Visibility—
Dew point42°
Tue, 2068° / 45°0
Morning50°feels 50°
Afternoon65°feels 63°
Evening63°feels 61°
Overnight58°feels 56°
68 °
Summit, Tuesday, 20 October
Clear. High 68°, low 45°.
Pressure30.36 inHg
Wind5.2 mph E
Humidity46%
Visibility—
Dew point41°
Wed, 2173° / 57°0
Morning61°feels 59°
Afternoon71°feels 69°
Evening67°feels 65°
Overnight63°feels 61°
73 °
Summit, Wednesday, 21 October
Overcast. High 73°, low 57°.
Pressure30.33 inHg
Wind6.7 mph S
Humidity38%
Visibility—
Dew point43°
Thu, 2275° / 59°0
Morning63°feels 61°
Afternoon72°feels 71°
Evening70°feels 68°
Overnight66°feels 64°
75 °
Summit, Thursday, 22 October
Partly cloudy. High 75°, low 59°.
Pressure30.21 inHg
Wind8.7 mph S
Humidity36%
Visibility—
Dew point43°
Fri, 2379° / 63°0.01
Morning67°feels 66°
Afternoon77°feels 76°
Evening75°feels 75°
Overnight70°feels 70°
79 °
Summit, Friday, 23 October
Light rain. High 79°, low 63°.
Pressure30.00 inHg
Wind14 mph S
Humidity46%
Visibility—
Dew point53°
Sat, 2468° / 64°0.44
Morning66°feels 67°
Afternoon67°feels 68°
Evening65°feels 66°
Overnight65°feels 65°
68 °
Summit, Saturday, 24 October
Rain. High 68°, low 64°.
Pressure30.18 inHg
Wind7.8 mph SW
Humidity84%
Visibility—
Dew point62°
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.