Weather WorldBarnhart, MO Weather Forecast
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Barnhart Weather Forecast
| THIS AFTERNOON | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | |  | |  |  | | | |  |  |
| Mostly Sunny | Partly Cloudy | Mostly Sunny | Clear | Sunny | Chance of T-Storm | Chance of T-Storm | Clearing | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers |
| Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 30% | POP: 20% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1123 AM CDT Sun Sep 13 2026 
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Issued: 1215 PM CDT Sun Sep 13 2026
Key Messages
- Unseasonably hot weather is expected this week with heat index readings at or above 100 degrees in some locations Tuesday into Thursday.
- There are chances (30-70%) of showers and thunderstorms each day that are mainly confined to parts of northeast Missouri and west- central Illinois near a stalled front.
Aviation
/18Z TAFS THROUGH 00Z TUESDAY/... Issued at 1212 PM CDT Sun Sep 13 2026
A few showers and thunderstorms are possible this afternoon in southeast Missouri, though south of the ...