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Gillen, IL Weather Forecast
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Gillen Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY |
 |  |  | | | |  | | |  | | |
| Mostly Clear | Sunny | Mostly Cloudy | Mostly Sunny | Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C Lo: 51°FLo: 11°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 841 PM CDT Wed Oct 07 2026 
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Issued: 607 PM CDT Wed Oct 7 2026
Key Messages
- Warm temperatures and generally quiet weather is expected through the upcoming weekend. One exception may be a period of scattered showers and isolated storms late Thursday night into Friday.
- Will have to monitor the northward advance of the remnants of the Gulf tropical system Isaias late in the weekend and early next week, but it should steer mainly clear of the local area.
Aviation
/00Z TAFS THROUGH 00Z THURSDAY/... Issued at 605 PM CDT Wed Oct 7 2026
High confidence VFR weather wil...