Downingtown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Downingtown, a borough in Chester County, Pennsylvania.
Tonight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. North wind around 5 mph.
7-day forecast for Downingtown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 74°F | Mostly Sunny | 5 mph NE | 2% |
| Saturday Night | 61°F | Patchy Fog | 5 mph SE | 26% |
| Sunday | 75°F | Showers And Thunderstorms | 5 to 10 mph S | 82% |
| Sunday Night | 60°F | Showers And Thunderstorms | 5 mph NW | 83% |
| Monday | 68°F | Chance Rain Showers | 5 to 10 mph NE | 39% |
| Monday Night | 55°F | Chance Rain Showers | 5 to 10 mph NE | 33% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 40% |
| Tuesday Night | 51°F | Chance Rain Showers | 10 mph NE | 40% |
| Wednesday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 39% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms | 10 mph NE | 40% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 10 mph NE | 38% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 5 mph NE | 33% |
| Friday | 66°F | Chance Rain Showers | 5 to 10 mph N | 27% |
Forecast source: National Weather Service (api.weather.gov) for Downingtown (40.008, -75.702). Updated through the day.
Growing snapshot for Downingtown
Last spring frost
Apr 11
First fall frost
Nov 1
Growing season
205 days
Hardiness zone
7a
More local growing data for Downingtown: nearby ZIP 19335 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Glenmoore, Pa (5.3 mi from Downingtown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.