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City of Naperville, ILNaperville, IL Weather Forecast
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| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | |  | | |  |  | | | |  |
| Partly Cloudy | Partly Cloudy | Clearing | Chance of Showers | Clearing | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers |
| Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C |
| POP: 40% | POP: 40% | POP: 60% | POP: 80% | POP: 80% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 120 AM CDT Sat Sep 12 2026 
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Issued: 313 AM CDT Sat Sep 12 2026
Key Messages
- Dry and mild today, turning cooler Sunday with a chance for a few afternoon showers.
- Waves of heavy rain producing thunderstorms possible in the general region early to mid next week.
Discussion
... Issued at 313 AM CDT Sat Sep 12 2026
A low-level thermal ridge will briefly push northeastward across the area today ahead of a cold front advancing from the Upper Midwest. This will bring warmer and slightly more humid conditions, with high temperatures reaching the mid to upper 80s and hea...