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Jefferson Junior High School, IL Weather Forecast
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Jefferson Junior High School Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  |  | |  |  | |  |  | | |
| Chance of T-Storm | Chance of T-Storm | Clear | Partly Cloudy | Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy |
| Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 70°FLo: 21°C | Hi: 85°FHi: 29°C |
| POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 656 PM CDT Tue Aug 25 2026 
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Issued: 635 PM CDT Tue Aug 25 2026
Key Messages
- Isolated thunderstorms are possible across northern Illinois late tonight through daybreak. The strongest storms closer to the Wisconsin state line may contain small hail.
- Potential for strong to severe thunderstorms Wednesday afternoon and early evening along a cold front, with greatest severe threat (level 2 of 5) around and east of a Valparaiso to Paxton line.
Discussion
... Issued at 206 PM CDT Tue Aug 25 2026
An upper-level low centered over the southern Manitoba and Ontario border...