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St. Elmo Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  |  |  |  | | | | | | |
| Patchy Fog | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Mostly Clear | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Hi: 90°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°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: 69°FLo: 21°C | Hi: 95°FHi: 35°C Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C Lo: 61°FLo: 16°C |
| POP: 40% | POP: 40% | POP: 20% | POP: 20% | POP: 40% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 538 AM CDT Sat Sep 12 2026 
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Issued: 618 AM CDT Sat Sep 12 2026
Key Messages
- There is a chance (20-30%) for showers and thunderstorms across central and northeast Missouri into west central Illinois late this afternoon and tonight. The chance for rain spreads southeast across the area on Sunday.
- Temperatures will remain above normal for most of the area into next week with a chance for rain continuing, mainly across northern Missouri into central Illinois.
Aviation
/00Z TAFS THROUGH 06Z SUNDAY/... Issued at 1037 PM CDT Fri Sep 11 2026
Fog will be found initially...