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Porter Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  |  |  | | |  | | | |  |
| Chance of T-Storm | Patchy Fog | Partly Cloudy | Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Chance of Showers | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Chance of T-Storm |
| Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C |
| POP: 50% | POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 417 PM CDT Wed Aug 19 2026 
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Porter Lake Forecast Discussion
Issued: 243 PM CDT Wed Aug 19 2026
Key Messages
- More showers and thunderstorms are expected across portions of the area this evening, including a conditional threat of severe thunderstorms with a main hazard of damaging winds. This treat is greatest across southeastern MO/southwestern IL and northeastern MO/west-central IL.
- Near to slightly below average temperatures will continue through at least the weekend.&&
.SHORT TERM /THROUGH TONIGHT/... Issued at 235 PM CDT Wed Aug 19 2026
A rather complex and l...