Greencastle, MO Weather Forecast
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| THIS AFTERNOON | TONIGHT | TUESDAY | TUESDAY NIGHT | VETERANS DAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SATURDAY NIGHT | SUNDAY |
| Sunny | Patchy Fog | Patchy Fog | Clearing | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Sunny |
| Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 59°FHi: 15°C | Lo: 39°FLo: 4°C | Hi: 49°FHi: 9°C | Hi: 45°FHi: 7°C Lo: 29°FLo: -2°C | Hi: 45°FHi: 7°C Lo: 29°FLo: -2°C | Hi: 50°FHi: 10°C Lo: 35°FLo: 2°C | Hi: 50°FHi: 10°C Lo: 35°FLo: 2°C | Hi: 55°FHi: 13°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1227 PM CST Mon Nov 09 2026 

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Issued: 539 PM CST Mon Nov 9 2026
Key Messages
- Mild Weather Conditions To Start the Week
- Low Rain Chances East of Hwy. 63 Midweek
- Cooler Next Weekend
Discussion
... Issued at 136 PM CST Mon Nov 9 2026
Mid and upper-level synoptic pattern is fairly progressive for the northern third of the CONUS and into the Canadian Prairie Provinces. This is currently resulting in modest mid-level ridging across the eastern Plains and lower Missouri River Valley this afternoon, continuing the development of the surface anticyclone, but is starting ...
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