Weather WorldThomas Lake, IL Weather Forecast
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Thomas Lake Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  | | | |  |  | |  | |
| Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Showers | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Partly Sunny |
| Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C Lo: 61°FLo: 16°C | Hi: 69°FHi: 21°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 | Hi: 70°FHi: 21°C |
| POP: 20% | POP: 40% | POP: 70% | POP: 70% | POP: 70% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 746 PM CDT Thu Sep 17 2026 
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Issued: 639 PM CDT Thu Sep 17 2026
Key Messages
- The wet weather pattern will continue through the weekend with rounds of rain which may be heavy at times. There will be periods of dry weather between each round.
- The repeated rounds of rain will result in general rises on the Mississippi River with the potential for river flooding on tributary rivers.
Aviation
/00Z TAFS THROUGH 00Z SATURDAY/... Issued at 639 PM CDT Thu Sep 17 2026
VFR to IFR conditions were observed over the area as of TAF issuance. Eventually, all TAF terminals are e...