Summum, IL Weather Forecast
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Summum Weather Forecast
| REST OF TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY |
| Clear | Mostly Sunny | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Rain |
| Lo: 29°FLo: -2°C | Hi: 51°FHi: 11°C | Lo: 29°FLo: -2°C | Hi: 55°FHi: 13°C | Lo: 31°FLo: -1°C | Hi: 59°FHi: 15°C | Lo: 35°FLo: 2°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C Lo: 45°FLo: 7°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C |
| POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1227 AM CST Sun Nov 15 2026 

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Issued: 952 PM CST Sat Nov 14 2026
Key Messages
- Below normal temperatures will prevail through this weekend, with a warming trend bringing temperatures back to above normal levels during mid and late week.
- Another long stretch of dry weather is expected across central and southeast IL through mid week, and possibly through Friday. Dry weather with warming temperatures may allow the moderate to severe drought over east central and southeast IL to continue to expand further into central IL.
Discussion
... Issued at 230 PM CST Sat Nov ...
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