Sumner, IL Weather Forecast

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Sumner, IL Weather Forecast

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Sumner IL weather  - Clear - 72°F
Clear
72°F
Updated 3:21 am
Feels Like 76°F
Humidity 97%
Wind N 0 mph
Barometer  29.87 in
Dew Point 71°F
Sumner IL weather  - Clear - 22°C
Clear
22°C
Updated 3:21 am
Feels Like 25°C
Humidity 97%
Wind N 0 km/h
Barometer  101.1 kPa
Dew Point 22°C

Sumner Weather Forecast

REST OF TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY THURSDAY THURSDAY NIGHT
Sumner, IL Weather - Rest Of Tonight Chance Of T-Storm Sumner, IL Weather - Saturday Chance Of T-Storm Sumner, IL Weather - Saturday Night Mostly Clear Sumner, IL Weather - Sunday Chance Of Showers Sumner, IL Weather - Sunday Night Chance Of Showers Sumner, IL Weather - Monday Mostly Sunny Sumner, IL Weather - Monday Night Mostly Clear Sumner, IL Weather - Tuesday Mostly Clear Sumner, IL Weather - Tuesday Night Mostly Clear Sumner, IL Weather - Wednesday Mostly Clear Sumner, IL Weather - Thursday Chance Of Showers Sumner, IL Weather - Thursday Night Chance Of Showers
Chance of T-Storm Chance of T-Storm Mostly Clear Chance of Showers Chance of Showers Mostly Sunny Mostly Clear Mostly Clear Mostly Clear Mostly Clear Chance of Showers Chance of Showers
Lo: 70°FLo: 21°C Hi: 89°FHi: 32°C
Lo: 65°FLo: 18°C Hi: 90°FHi: 32°C
Lo: 61°FLo: 16°C Hi: 85°FHi: 29°C
Hi: 95°FHi: 35°C
Lo: 65°FLo: 18°C
Hi: 95°FHi: 35°C
Lo: 65°FLo: 18°C
Hi: 95°FHi: 35°C
Lo: 71°FLo: 22°C
Hi: 95°FHi: 35°C
Lo: 71°FLo: 22°C
Hi: 91°FHi: 33°C
Lo: 65°FLo: 18°C
Hi: 91°FHi: 33°C
Lo: 65°FLo: 18°C
POP: 70% POP: 50% POP: 30% POP: 30% POP: 40% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 127 AM CDT Sat Sep 12 2026 Sumner, IL Weather - WeatherWorld.com

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Issued: 212 AM CDT Sat Sep 12 2026

Key Messages

  • Temperature Spread Sunday: A stalling cold front creates a sharp temperature split Sunday, ranging from the mid 70s north of the Illinois River to near 90 south of I-70. Light showers or sprinkles (20-30% chance) remain possible along the boundary.
  • Midweek Storm Potential: Multiple rounds of thunderstorms arrive Tuesday into Wednesday. There is potential for localized heavy rainfall exceeding 1-2 inches, especially north of Beardstown to Bloomington, along with a potential for severe...