Norristown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Norristown, a borough in Montgomery County, Pennsylvania.
This Afternoon
84°F
Mostly Sunny
Mostly sunny, with a high near 84. North wind 5 to 10 mph.
7-day forecast for Norristown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Mostly Sunny | 5 to 10 mph N | 0% |
| Tonight | 58°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 75°F | Mostly Sunny | 5 mph E | 1% |
| Saturday Night | 62°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph E | 22% |
| Sunday | 76°F | Showers And Thunderstorms | 5 to 10 mph S | 82% |
| Sunday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph NW | 83% |
| Monday | 70°F | Chance Rain Showers | 10 mph NE | 42% |
| Monday Night | 56°F | Chance Rain Showers | 5 to 10 mph NE | 31% |
| Tuesday | 65°F | Chance Rain Showers | 10 to 15 mph NE | 35% |
| Tuesday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 35% |
| Wednesday | 63°F | Chance Rain Showers | 15 mph NE | 35% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 38% |
| Thursday | 64°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 36% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 32% |
Forecast source: National Weather Service (api.weather.gov) for Norristown (40.122, -75.340). Updated through the day.
Growing snapshot for Norristown
Last spring frost
Apr 8
First fall frost
Oct 31
Growing season
203 days
Hardiness zone
7a
More local growing data for Norristown: nearby ZIP 19401 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Ambler
Arcadia University
Audubon
Bala Cynwyd
Blue Bell
Bridgeport
Bryn Athyn
Cheltenham Village
Collegeville
Conshohocken
Eagleville
East Greenville
Elkins Park
Evansburg
Flourtown
Fort Washington
Gilbertsville
Glenside
Green Lane
Halfway House
Harleysville
Hatboro
Hatfield
Horsham
Jenkintown
Kenilworth
King of Prussia
Kulpsville
Lansdale
Maple Glen
Climate data from the nearest NOAA station, Norristown, Pa (1.4 mi from Norristown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.