Millbourne, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Millbourne, a borough in Philadelphia County, Pennsylvania.
Overnight
66°F
Mostly Cloudy
Mostly cloudy, with a low around 66. North wind around 5 mph.
7-day forecast for Millbourne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Mostly Cloudy | 5 mph N | 0% |
| Tuesday | 86°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tuesday Night | 68°F | Mostly Cloudy | 0 to 5 mph E | 6% |
| Wednesday | 86°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 70% |
| Wednesday Night | 73°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph S | 73% |
| Thursday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Thursday Night | 74°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 29% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 38% |
| Friday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SW | 44% |
| Saturday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 37% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 37% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 16% |
| Sunday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 16% |
| Monday | 91°F | Sunny | 5 to 10 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov) for Millbourne (39.964, -75.253). Updated through the day.
Growing snapshot for Millbourne
Last spring frost
Mar 30
First fall frost
Nov 17
Growing season
232 days
Hardiness zone
7b
More local growing data for Millbourne: nearby ZIP 19151 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Phila Franklin Inst, Pa (4.7 mi from Millbourne). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.