Mark, IL Weather Forecast
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| REST OF TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
| Patchy Fog | Patchy Fog | Mostly Cloudy | Sunny | Partly Cloudy | Chance of Showers | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Hi: 71°FHi: 22°C Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C Lo: 55°FLo: 13°C |
| POP: 30% | POP: 40% | POP: 40% | POP: 40% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 126 AM CDT Tue Oct 27 2026 

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Issued: 1249 AM CDT Tue Oct 27 2026
Key Messages
- Unseasonably mild fall weather continues through the end of the week with passing clouds and relatively light winds.
- Precipitation chances increase late this week and into early next week as a more active pattern takes shape.
Aviation
/06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 1249 AM CDT Tue Oct 27 2026
VFR conditions are likely to prevail over the next 24 hours. There is a small chance (10%) that some MVFR fog could develop at CID and MLI through sunrise, but easterly flow of 5-10 ...
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