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Waltham Elementary School, IL Weather Forecast
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Waltham Elementary School Weather Forecast
| LATE THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Thunderstorms | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C |
| POP: 60% | POP: 40% | POP: 70% | POP: 80% | POP: 80% | POP: 70% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 251 PM CDT Fri Sep 18 2026 
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Issued: 257 PM CDT Fri Sep 18 2026
Key Messages
- Periods of heavy rain and scattered thunderstorms late tonight through Sunday night. Localized flash flooding will be possible where the heaviest rains occur over the same areas. A Flood Watch for flash flooding is in effect for much of northern Illinois and far northwest Indiana late tonight through Saturday morning.
- Below normal temps early next week then dry weather expected mid/late next week.
Discussion
... Issued at 257 PM CDT Fri Sep 18 2026
An unseasonably strong mid-level ridge...