Greene County, IL Weather Forecast
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Greene County Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
| Chance of Showers | Mostly Cloudy | Partly Cloudy | Sunny | Mostly Clear | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers |
| Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C |
| POP: 20% | POP: 50% | POP: 60% | POP: 60% | POP: 70% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 943 PM CDT Sat Sep 26 2026 

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Issued: 136 AM CDT Sun Sep 27 2026
Key Messages
- Widespread rain is forecast beginning late Tuesday and last through late this week. Northeast Missouri and west-central Illinois have the best chance at receiving higher end amounts.
- A gradual warm-up will last through the early week with most seeing highs in the 80s on Tuesday.
Aviation
/00Z TAFS THROUGH 06Z MONDAY/... Issued at 1000 PM CDT Sat Sep 26 2026
Showers will increase in coverage overnight mainly across central/northeastern MO into west-central IL including KCOU, KJEF, and KU...
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