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
74°F
Sunny
Sunny, with a high near 74. South wind 0 to 5 mph.
7-day forecast for King of Prussia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Sunny | 0 to 5 mph S | 2% |
| Tonight | 58°F | Mostly Cloudy | 5 mph S | 2% |
| Thursday | 73°F | Light Rain Likely | 5 to 10 mph S | 58% |
| Thursday Night | 61°F | Light Rain | 0 to 5 mph SW | 82% |
| Friday | 70°F | Light Rain | 0 to 5 mph N | 82% |
| Friday Night | 49°F | Light Rain | 0 to 5 mph NW | 75% |
| Saturday | 64°F | Mostly Sunny | 5 to 10 mph NW | 8% |
| Saturday Night | 41°F | Partly Cloudy | 5 mph W | 8% |
| Sunday | 60°F | Mostly Sunny | 5 to 10 mph NW | 5% |
| Sunday Night | 38°F | Mostly Clear | 5 mph W | 6% |
| Monday | 59°F | Sunny | 5 to 15 mph W | 6% |
| Monday Night | 36°F | Mostly Clear | 5 mph W | 4% |
| Tuesday | 63°F | Sunny | 5 to 10 mph W | 4% |
| Tuesday Night | 38°F | Mostly Clear | 5 mph W | 0% |
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 Nov 4, 2026.