King of Prussia, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for King of Prussia, a community in Montgomery County, Pennsylvania.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. Northeast wind 0 to 5 mph.
7-day forecast for King of Prussia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tonight | 67°F | Mostly Cloudy | 0 mph | 7% |
| Wednesday | 86°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 74% |
| Wednesday Night | 72°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 68% |
| Thursday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 10 mph S | 28% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 0 to 10 mph SW | 38% |
| Friday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 42% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Saturday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 39% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 39% |
| Sunday | 90°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 72°F | Partly Cloudy | 0 to 5 mph SW | 14% |
| Monday | 91°F | Mostly Sunny | 0 to 10 mph W | 11% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 18% |
Forecast source: National Weather Service (api.weather.gov) for King of Prussia (40.096, -75.379). Updated through the day.
Growing snapshot for King of Prussia
Last spring frost
Apr 8
First fall frost
Oct 31
Growing season
203 days
Hardiness zone
7a
More local growing data for King of Prussia: nearby ZIP 19406 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Norristown, Pa (2.8 mi from King of Prussia). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.