Arnold City, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arnold City, a community in Washington County, Pennsylvania.
This Afternoon
77°F
Mostly Sunny
Mostly sunny, with a high near 77. North wind around 7 mph.
7-day forecast for Arnold City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Mostly Sunny | 7 mph N | 14% |
| Tonight | 58°F | Partly Cloudy | 2 to 7 mph NE | 13% |
| Saturday | 80°F | Partly Sunny | 5 mph E | 3% |
| Saturday Night | 65°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 mph SE | 53% |
| Sunday | 78°F | Showers And Thunderstorms | 9 mph SW | 94% |
| Sunday Night | 61°F | Showers And Thunderstorms | 5 to 8 mph NW | 94% |
| Monday | 71°F | Chance Rain Showers | 10 mph NE | 45% |
| Monday Night | 59°F | Showers And Thunderstorms Likely | 10 mph E | 68% |
| Tuesday | 67°F | Showers And Thunderstorms | 10 to 14 mph E | 75% |
| Tuesday Night | 55°F | Showers And Thunderstorms Likely | 14 mph E | 71% |
| Wednesday | 65°F | Showers And Thunderstorms Likely | 14 mph E | 66% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 7 to 13 mph E | 51% |
| Thursday | 66°F | Chance Rain Showers | 9 mph E | 42% |
| Thursday Night | 53°F | Chance Rain Showers | 3 to 8 mph NE | 27% |
Forecast source: National Weather Service (api.weather.gov) for Arnold City (40.117, -79.823). Updated through the day.
Growing snapshot for Arnold City
Last spring frost
Apr 13
First fall frost
Nov 5
Growing season
205 days
Hardiness zone
6b
More local growing data for Arnold City: nearby ZIP 15412 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Charleroi Lock 4, Pa (4 mi from Arnold City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.