Harman US

Downingtown, PA Weather & Growing Conditions

Overnight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. Northeast wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 56°F Partly Cloudy 5 mph NE 0%
Saturday 74°F Mostly Sunny 5 mph NE 2%
Saturday Night 59°F Mostly Cloudy then Slight Chance Rain Showers 5 mph SE 18%
Sunday 74°F Chance Rain Showers then Slight Chance Showers And Thunderstorms 5 to 10 mph S 54%
Sunday Night 56°F Showers And Thunderstorms 5 mph NW 79%
Monday 67°F Chance Rain Showers 5 to 10 mph NE 27%
Monday Night 50°F Chance Rain Showers 5 to 10 mph NE 38%
Tuesday 61°F Chance Rain Showers 10 mph NE 43%
Tuesday Night 49°F Chance Rain Showers 10 mph NE 40%
Wednesday 60°F Chance Rain Showers 10 to 15 mph NE 34%
Wednesday Night 49°F Chance Rain Showers 10 to 15 mph NE 32%
Thursday 61°F Chance Rain Showers 10 to 15 mph NE 33%
Thursday Night 49°F Chance Rain Showers 5 to 10 mph NE 31%
Friday 64°F Slight Chance Rain Showers 10 mph N 24%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Downingtown, PA

Last spring frost
Apr 11
First fall frost
Nov 1
Growing season
205 days
Hardiness zone
7a

Explore more for Downingtown, PA: full frost dates · planting calendar · Pennsylvania frost dates

Climate data from the nearest NOAA station, Glenmoore, Pa (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.