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Acton Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  |  | | | |  | | |  |  |  |
| Chance of T-Storm | Sunny | Clear | Sunny | Clear | Mostly Sunny | Partly Cloudy | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers |
| Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Hi: 81°FHi: 27°C Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C Lo: 69°FLo: 21°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C |
| POP: 20% | POP: 40% | POP: 40% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 733 PM EDT Sat Sep 05 2026 
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Issued: 616 PM EDT Sat Sep 5 2026
Key Messages
- Heat Advisory through this evening for all of central Indiana except the far NE
- Isolated thunderstorm will be possible late this afternoon and evening
- Not as warm and less humid on Sunday and Monday
Discussion
(This evening through Saturday)... Issued at 153 PM EDT Sat Sep 5 2026
Surface analysis this afternoon shows a a weak, unorganized trough of low pressure stretching from OH, across Central Indiana to Illinois. Strong High pressure was found over Ontario and Quebec. Aloft, water va...