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Summit, IL Weather - 14-Day Weather Forecast

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Summit IL Weather - Mostly Clear - 84°F
Mostly Clear
84°F
Updated 11:27 pm
Feels Like 85°F
Humidity 71%
Wind SW 7 mph
Barometer  29.92 in
Dew Point 74°F
Summit IL Weather - Mostly Clear - 29°C
Mostly Clear
29°C
Updated 11:27 pm
Feels Like 30°C
Humidity 71%
Wind SW 11 km/h
Barometer  101.3 kPa
Dew Point 23°C
Summit, IL Weather and Current Conditionssummit il weather forecast

Summit, IL Weather Forecast

Summit Illinois WeatherSummit, Illinois Weather Weather Forecast
Here is the API 14 day weather forecast for Summit, Illinois. Note: The 7-day weather forecast for Summit, IL is the most reliable and accurate weather forecast. This template should only be used as a probable scenario. Forecasting weather beyond the next 7 days is a challenge.
Summit, IL Weather Forecast Dated: 1127 PM Wed Sep 02 2026 (Summit Time)
Expect a hot stretch with plenty of sunshine and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.

Wednesday, September 2, 2026

Mid-Morning
Summit Weather - 2026-09-02 - Morning - Overcast
83°F 28°C
Overcast
Mid-Afternoon
Summit Weather - 2026-09-02 - Afternoon - Sunny
101°F 39°C
Sunny
Early-Evening
Summit Weather - 2026-09-02 - Evening - Sunny
90°F 33°C
Sunny
Scorching heat reaching 101°F 39°C, feeling like 114°F 46°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds turning from the SW to the SSW at 8 mph 13 km/h.

Thursday, September 3, 2026

Mid-Morning
Summit Weather - 2026-09-03 - Morning - Overcast
82°F 28°C
Overcast
Mid-Afternoon
Summit Weather - 2026-09-03 - Afternoon - Sunny
95°F 35°C
Sunny
Early-Evening
Summit Weather - 2026-09-03 - Evening - Nearby Thunderstorms
89°F 32°C
Nearby Thunderstorms
Hot and sweltering around 95°F 35°C (heat index 99°F 37°C), locally heavy thunderstorms at times, with steady humidity and steady pressure. Winds switching from the WSW to the SSE at 5 mph 8 km/h.

Friday, September 4, 2026

Mid-Morning
Summit Weather - 2026-09-04 - Morning - Overcast
79°F 26°C
Overcast
Mid-Afternoon
Summit Weather - 2026-09-04 - Afternoon - Sunny
95°F 35°C
Sunny
Early-Evening
Summit Weather - 2026-09-04 - Evening - Nearby Thunderstorms
87°F 31°C
Nearby Thunderstorms
Very hot with a high of 95°F 35°C, feeling closer to 99°F 37°C in the humidity, heavy thunderstorms conditions at times, with lower humidity and steady pressure. Winds W at 9 mph 14 km/h.

Saturday, September 5, 2026

Mid-Morning
Summit Weather - 2026-09-05 - Morning - Sunny
82°F 28°C
Sunny
Mid-Afternoon
Summit Weather - 2026-09-05 - Afternoon - Sunny
88°F 31°C
Sunny
Early-Evening
Summit Weather - 2026-09-05 - Evening - Sunny
77°F 25°C
Sunny
Warm and summery around 88°F 31°C (feels like 91°F 33°C), sunny throughout the day, with increasing humidity and steady pressure. Winds picking up from N at 1 mph 1 km/h to NE at 10 mph 16 km/h.

Sunday, September 6, 2026

Mid-Morning
Summit Weather - 2026-09-06 - Morning - Sunny
73°F 23°C
Sunny
Mid-Afternoon
Summit Weather - 2026-09-06 - Afternoon - Sunny
80°F 27°C
Sunny
Early-Evening
Summit Weather - 2026-09-06 - Evening - Overcast
74°F 23°C
Overcast
Very warm with a high of 80°F 27°C, sunny through the afternoon, turning overcast this evening, with steady humidity and steady pressure. Winds shifting from the ENE to the E at 7 mph 11 km/h.

Monday, September 7, 2026

Mid-Morning
Summit Weather - 2026-09-07 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Summit Weather - 2026-09-07 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
Summit Weather - 2026-09-07 - Evening - Sunny
78°F 26°C
Sunny
Warm and summery near 84°F 29°C, sunny through the afternoon, turning overcast this evening, with lower humidity and steady pressure.

Tuesday, September 8, 2026

Mid-Morning
Summit Weather - 2026-09-08 - Morning - Partly Cloudy
78°F 26°C
Partly Cloudy
Mid-Afternoon
Summit Weather - 2026-09-08 - Afternoon - Partly Cloudy
92°F 33°C
Partly Cloudy
Early-Evening
Summit Weather - 2026-09-08 - Evening - Sunny
89°F 32°C
Sunny
Hot and sweltering around 92°F 33°C, cloudy in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds SW at 11 mph 18 km/h. Gusts up to 24 mph 38 km/h.

Wednesday, September 9, 2026

Mid-Morning
Summit Weather - 2026-09-09 - Morning - Cloudy
87°F 31°C
Cloudy
Mid-Afternoon
Summit Weather - 2026-09-09 - Afternoon - Cloudy
94°F 35°C
Cloudy
Early-Evening
Summit Weather - 2026-09-09 - Evening - Sunny
88°F 31°C
Sunny
Hot and sweltering around 94°F 35°C (heat index 97°F 36°C), cloudy in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the WSW to the NW at 6 mph 10 km/h.

Thursday, September 10, 2026

Mid-Morning
Summit Weather - 2026-09-10 - Morning - Overcast
69°F 21°C
Overcast
Mid-Afternoon
Summit Weather - 2026-09-10 - Afternoon - Overcast
76°F 24°C
Overcast
Early-Evening
Summit Weather - 2026-09-10 - Evening - Cloudy
70°F 21°C
Cloudy
Mild temperatures up to 76°F 24°C, overcast through the afternoon, turning sunny this evening, with lower humidity and steady pressure. Winds blowing from the NE at 9 mph 14 km/h.

Friday, September 11, 2026

Mid-Morning
Summit Weather - 2026-09-11 - Morning - Sunny
75°F 24°C
Sunny
Mid-Afternoon
Summit Weather - 2026-09-11 - Afternoon - Sunny
93°F 34°C
Sunny
Early-Evening
Summit Weather - 2026-09-11 - Evening - Sunny
89°F 32°C
Sunny
Sizzling hot near 93°F 34°C with a heat index reaching 97°F 36°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds SSW at 10 mph 15 km/h.

Saturday, September 12, 2026

Mid-Morning
Summit Weather - 2026-09-12 - Morning - Sunny
85°F 30°C
Sunny
Mid-Afternoon
Summit Weather - 2026-09-12 - Afternoon - Partly Cloudy
95°F 35°C
Partly Cloudy
Early-Evening
Summit Weather - 2026-09-12 - Evening - Cloudy
91°F 33°C
Cloudy
Hot and sweltering around 95°F 35°C (heat index 98°F 36°C), sunny in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds shifting from the SW to the S at 8 mph 13 km/h. Gusts up to 20 mph 31 km/h.

Sunday, September 13, 2026

Mid-Morning
Summit Weather - 2026-09-13 - Morning - Overcast
86°F 30°C
Overcast
Mid-Afternoon
Summit Weather - 2026-09-13 - Afternoon - Sunny
95°F 35°C
Sunny
Early-Evening
Summit Weather - 2026-09-13 - Evening - Sunny
87°F 31°C
Sunny
Hot and sweltering around 95°F 35°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds turning from the SW to the NW at 10 mph 16 km/h. Gusts up to 23 mph 38 km/h.

Monday, September 14, 2026

Mid-Morning
Summit Weather - 2026-09-14 - Morning - Sunny
79°F 26°C
Sunny
Mid-Afternoon
Summit Weather - 2026-09-14 - Afternoon - Sunny
90°F 32°C
Sunny
Early-Evening
Summit Weather - 2026-09-14 - Evening - Sunny
83°F 28°C
Sunny
Sizzling hot with 90°F 32°C, sunny throughout the day, with steady humidity and steady pressure.

Tuesday, September 15, 2026

Mid-Morning
Summit Weather - 2026-09-15 - Morning - Sunny
79°F 26°C
Sunny
Mid-Afternoon
Summit Weather - 2026-09-15 - Afternoon - Sunny
92°F 33°C
Sunny
Early-Evening
Summit Weather - 2026-09-15 - Evening - Sunny
87°F 31°C
Sunny
Hot temperatures near 92°F 33°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure.

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