Downingtown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Downingtown, a borough 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 Downingtown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Sunny | 5 mph S | 2% |
| Tonight | 48°F | Patchy Fog | 0 to 5 mph S | 3% |
| Wednesday | 72°F | Patchy Fog then Partly Sunny | 0 to 5 mph S | 2% |
| Wednesday Night | 56°F | Mostly Cloudy | 0 to 5 mph S | 5% |
| Thursday | 71°F | Chance Light Rain | 5 to 10 mph S | 50% |
| Thursday Night | 59°F | Chance Light Rain then Chance T-storms | 0 to 5 mph SW | 69% |
| Friday | 69°F | Light Rain Likely | 0 to 5 mph SW | 74% |
| Friday Night | 51°F | Light Rain Likely | 0 mph | 74% |
| Saturday | 65°F | Slight Chance Light Rain | 5 mph NW | 19% |
| Saturday Night | 42°F | Slight Chance Light Rain then Partly Cloudy | 5 mph NW | 15% |
| Sunday | 61°F | Mostly Sunny | 5 mph NW | 10% |
| Sunday Night | 41°F | Chance Light Rain | 0 to 5 mph W | 26% |
| Monday | 58°F | Chance Light Rain | 5 to 10 mph NW | 30% |
| Monday Night | 39°F | Chance Light Rain | 5 to 10 mph W | 30% |
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
Nearby towns & communities
Atglen
Avondale
Berwyn
Caln
Chadds Ford
Chesterbrook
Christiana
Coatesville
Cochranville
Devon
Eagle
Eagleview
Elverson
Exton
Frazer
Glenmoore
Hamorton
Hayti
Honey Brook
Kennett Square
Kimberton
Lincoln University
Lionville
Little Britain
Malvern
Marshallton
Modena
Nottingham
Oxford
Paoli
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 Nov 3, 2026.