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Harrisburg, IN Weather Forecast
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| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | | | | | | | | | | |
| Sunny | Clear | Sunny | Clear | Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear |
| Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 69°FHi: 21°C | Lo: 35°FLo: 2°C | Hi: 69°FHi: 21°C | Lo: 39°FLo: 4°C | Hi: 70°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 404 AM EDT Sun Oct 18 2026 
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Issued: 1229 AM EDT Sun Oct 18 2026
Key Messages
1) High pressure will persist over the region through the week, bringing dry conditions. Below normal temperatures today will slowly moderate into midweek.
Discussion
... Key Message 1) High pressure continues to provide calm winds and clear skies this morning. The only exception is where some valley fog is occurring across portions of southern Ohio and northern Kentucky. Temperatures are falling into the mid 30s as of this writing, with the local ridgetops the warmest and local valley...