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Foster Park Weather Forecast
| REST OF TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
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| Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Showers Likely | Chance of Showers | Chance of Showers | Chance of Showers | Showers | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C |
| POP: 40% | POP: 70% | POP: 70% | POP: 70% | POP: 70% | POP: 60% | POP: 20% | POP: 40% | POP: 50% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1005 AM CDT Mon Sep 14 2026 
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Issued: 647 AM CDT Mon Sep 14 2026
Key Messages
- Waves of heavy rain producing thunderstorms possible in the general region Tuesday through Thursday.
Discussion
... Issued at 322 AM CDT Mon Sep 14 2026
The core of a 1020 mb surface high pressure system is shifting across the western Great Lakes early this morning. Light winds, clear skies, and a drier air mass beneath the high have allowed temperatures to drop into the 40s, especially west of the Fox Valley in northern Illinois. Shallow ground fog has developed in places and will like...