Weather World
Borough of Cornwall, PACornwall, PA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Cornwall Weather Forecast
| THIS AFTERNOON | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | |  | | | | |  |  | | |
| Mostly Sunny | Mostly Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Showers Likely | Showers Likely | Sunny | Mostly Clear |
| Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C |
| POP: 60% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 300 PM EDT Sun Sep 06 2026 
Cornwall Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Cornwall Weather Map
Cornwall Quick Facts
Cornwall Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 140 PM EDT Sun Sep 6 2026
Key Messages
1) A nice end to the Labor Day weekend.
2) Uptick in heat and humidity for mid midweek.
3) Showers, storms, and gusty winds Wednesday night into Thursday.
Discussion
... KEY MESSAGE 1: A nice end to the Labor Day weekend.
A few clouds outside this afternoon, but a very dry airmass is above about 850 mb, so no showers for a change after a wet start to September.
In the wake of Saturday`s cold front, a refreshingly low dewpoint airmass has settled in across Pennsylvania and will ensure pleas...