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Lake Forest High School, IL Weather Forecast
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Lake Forest High School Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
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| Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of T-Storm | Partly Cloudy | Chance of Showers | Partly Cloudy | Chance of Showers |
| Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C |
| POP: 30% | POP: 40% | POP: 40% | POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 736 AM CDT Sat Aug 29 2026 
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Issued: 611 AM CDT Sat Aug 29 2026
Key Messages
- Periodic showers and storms are possible through early next week, but many hours will remain dry
- Heat and humidity ramp up next week with highest heat indices expected mid-week
Discussion
... Issued at 200 AM CDT Sat Aug 29 2026
Surface high pressure that has made for pleasant conditions the past couple of days is slowly departing to the east. An upper level ridge is expected to slowly slide eastward and expand across the Great Plains today. There is a fairly stout MCS in eastern South ...