Downingtown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Downingtown, a borough in Chester County, Pennsylvania.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. Northeast wind 0 to 5 mph.
7-day forecast for Downingtown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tonight | 66°F | Mostly Cloudy | 0 mph | 9% |
| Wednesday | 83°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 74% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 48% |
| Thursday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 10 mph SW | 31% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 41% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph SW | 15% |
| Monday | 89°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 17% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 mph W | 18% |
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 Aug 4, 2026.