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St. Louis County Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  | | |  |  | |  |  | |  |
| Partly Cloudy | Sunny | Patchy Fog | Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Mostly Cloudy |
| Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 40°FLo: 4°C | Hi: 51°FHi: 11°C Lo: 31°FLo: -1°C | Hi: 51°FHi: 11°C Lo: 31°FLo: -1°C | Hi: 45°FHi: 7°C Lo: 29°FLo: -2°C |
| POP: 20% | POP: 50% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 946 PM CDT Tue Oct 20 2026 
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Issued: 639 PM CDT Tue Oct 20 2026
Key Messages
- Above normal temperatures through Saturday.
- Next chance of rain (20-40%) is Friday afternoon into Saturday.
- Near-normal temperatures return Sunday.
Discussion
... Issued at 121 PM CDT Tue Oct 20 2026
SYNOPTIC:
A complex split-flow regime was found aloft over the North American continent early this afternoon. A cutoff low was positioned off the coast of California with a broad relatively flat ridge farther east across the Canadian Prairies into Ontario. A northern jet stream with several ...