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St. Martins Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY |
 |  | |  | | |  | | | | | |
| Clear | Patchy Fog | Mostly Clear | Sunny | Clear | Sunny | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Sunny |
| Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 90°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C Lo: 61°FLo: 16°C | Hi: 91°FHi: 33°C Lo: 59°FLo: 15°C | Hi: 91°FHi: 33°C Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 943 PM CDT Wed Oct 07 2026 
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Issued: 608 PM CDT Wed Oct 7 2026
Key Messages
- Dry weather with unseasonably warm temperatures are forecast through early next week.
- The remnants of Tropical Cyclone Isaias may bring (beneficial) rain to parts of southeast Missouri and southwest Illinois this weekend, but there remains a lot of uncertainty with its track.
Aviation
/00Z TAFS THROUGH 06Z FRIDAY/... Issued at 600 PM CDT Wed Oct 7 2026
Winds will become light and variable this evening and continue through the TAF period. Confidence in fog development tonight is still to...