Devon, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Devon, a community in Chester County, Pennsylvania.
Overnight
64°F
Mostly Cloudy
Mostly cloudy, with a low around 64. North wind around 5 mph.
7-day forecast for Devon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Mostly Cloudy | 5 mph N | 0% |
| Tuesday | 85°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tuesday Night | 66°F | Mostly Cloudy | 0 to 5 mph SE | 7% |
| Wednesday | 84°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph SE | 77% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph S | 64% |
| Thursday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph S | 26% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 36% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 42% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SW | 43% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph W | 38% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 5 mph W | 38% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph W | 15% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 mph SW | 15% |
| Monday | 90°F | Sunny | 5 to 10 mph W | 11% |
Forecast source: National Weather Service (api.weather.gov) for Devon (40.049, -75.427). Updated through the day.
Growing snapshot for Devon
Last spring frost
Apr 8
First fall frost
Oct 31
Growing season
203 days
Hardiness zone
7a
More local growing data for Devon: nearby ZIP 19333 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Norristown, Pa (6.6 mi from Devon). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.