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San Juan Headstart, IL Weather Forecast
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San Juan Headstart Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 | |  |  |  |  | | |  | |  |  |
| Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Partly Cloudy | Mostly Clear | Sunny | Clear | Mostly Sunny | Partly Cloudy | Chance of T-Storm | Chance of Showers | Chance of Showers |
| Hi: 65°FHi: 18°C | Hi: 71°FHi: 22°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C |
| POP: 100% | POP: 100% | POP: 40% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 405 AM CDT Sat Aug 01 2026 
San Juan Headstart Radar Loop
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