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Arnold School Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | |  | | | | | | | | |
| Sunny | Mostly Clear | Sunny | Partly Cloudy | Sunny | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy |
| Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 59°FHi: 15°C | Lo: 31°FLo: -1°C | Hi: 59°FHi: 15°C | Lo: 31°FLo: -1°C | Hi: 61°FHi: 16°C | Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 730 AM EDT Wed Oct 21 2026 
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Issued: 558 AM EDT Wed Oct 21 2026
Key Messages
1) Dry and seasonably mild early Autumn weather continue through this weekend and into the last week of October.
Discussion
... KEY MESSAGE 1: Dry and seasonably mild early Autumn weather continue through this weekend and into the last week of October.
Persistent, incredibly low precipitable water values (under 0.4 of an inch) will continue to reside over all of Central PA today and tonight under a ridge of high pressure.
A band of slightly higher PWAT (0.5-0.7 of an inch) and some sct-b...