Devon, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Devon, a community in Chester County, Pennsylvania.
This Afternoon
69°F
Mostly Sunny
Mostly sunny, with a high near 69. South wind around 5 mph.
7-day forecast for Devon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Sunny | 5 mph S | 2% |
| Tonight | 49°F | Partly Cloudy | 5 mph S | 3% |
| Wednesday | 72°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Wednesday Night | 57°F | Mostly Cloudy | 5 mph S | 2% |
| Thursday | 71°F | Chance Light Rain | 5 to 10 mph S | 42% |
| Thursday Night | 60°F | Chance Light Rain then Chance T-storms | 5 mph SW | 69% |
| Friday | 69°F | Light Rain | 0 to 5 mph SW | 76% |
| Friday Night | 52°F | Light Rain | 5 mph NW | 76% |
| Saturday | 65°F | Slight Chance Light Rain | 5 mph NW | 24% |
| Saturday Night | 44°F | Slight Chance Light Rain then Partly Cloudy | 5 mph NW | 16% |
| Sunday | 61°F | Mostly Sunny | 5 mph NW | 11% |
| Sunday Night | 42°F | Slight Chance Light Rain | 5 mph W | 24% |
| Monday | 57°F | Chance Light Rain | 5 to 10 mph NW | 33% |
| Monday Night | 40°F | Chance Light Rain | 10 mph W | 33% |
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 Nov 3, 2026.