Deemston, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Deemston, a borough in Washington County, Pennsylvania.
Tonight
59°F
Partly Cloudy
Partly cloudy, with a low around 59. Northeast wind 2 to 7 mph.
7-day forecast for Deemston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Partly Cloudy | 2 to 7 mph NE | 12% |
| Saturday | 80°F | Mostly Sunny | 3 mph E | 4% |
| Saturday Night | 65°F | Partly Cloudy then Showers And Thunderstorms Likely | 2 to 6 mph SE | 55% |
| Sunday | 78°F | Showers And Thunderstorms | 6 to 9 mph SW | 93% |
| Sunday Night | 60°F | Showers And Thunderstorms | 5 to 8 mph NW | 93% |
| Monday | 70°F | Chance Rain Showers | 10 mph NE | 46% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 9 mph NE | 68% |
| Tuesday | 67°F | Showers And Thunderstorms | 12 mph E | 75% |
| Tuesday Night | 55°F | Showers And Thunderstorms Likely | 9 to 13 mph E | 70% |
| Wednesday | 64°F | Showers And Thunderstorms Likely | 12 mph E | 66% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 5 to 12 mph E | 53% |
| Thursday | 66°F | Chance Rain Showers | 8 mph E | 42% |
| Thursday Night | 53°F | Chance Rain Showers | 3 to 8 mph NE | 30% |
| Friday | 69°F | Partly Sunny then Slight Chance Rain Showers | 3 to 8 mph N | 15% |
Forecast source: National Weather Service (api.weather.gov) for Deemston (40.027, -80.033). Updated through the day.
Growing snapshot for Deemston
Last spring frost
Apr 13
First fall frost
Nov 5
Growing season
205 days
Hardiness zone
6b
More local growing data for Deemston: nearby ZIP 15333 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Charleroi Lock 4, Pa (10 mi from Deemston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.