Weather WorldSignal Hill, IL Weather Forecast
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Signal Hill Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  |  | | |  |  | | |  | |
| Patchy Fog | Partly Cloudy | Sunny | Mostly Clear | Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Chance of T-Storm | Partly Sunny | Chance of T-Storm |
| Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C |
| POP: 40% | POP: 40% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 442 AM CDT Fri Aug 21 2026 
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Issued: 405 AM CDT Fri Aug 21 2026
Key Messages
- There is a slight chance for showers and thunderstorms tonight into early Saturday morning. Otherwise, dry weather is expected into the weekend with temperatures mainly in the 80s.
- Near to slightly below normal temperatures are expected next week. There are low chances for rain late Sunday night through Monday night, and again toward the middle and end of the week..
Aviation
/00Z TAFS THROUGH 06Z SATURDAY/... Issued at 1028 PM CDT Thu Aug 20 2026
Fog is still expected across much of the...