Newtown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newtown, a borough in Bucks County, Pennsylvania.
Overnight
58°F
Mostly Cloudy
Mostly cloudy, with a low around 58. Northeast wind around 10 mph.
7-day forecast for Newtown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Mostly Cloudy | 10 mph NE | 0% |
| Saturday | 73°F | Mostly Sunny | 5 to 10 mph E | 1% |
| Saturday Night | 60°F | Patchy Fog | 5 mph E | 19% |
| Sunday | 75°F | Showers And Thunderstorms | 5 to 10 mph SE | 82% |
| Sunday Night | 60°F | Showers And Thunderstorms | 5 to 10 mph W | 84% |
| Monday | 69°F | Chance Rain Showers | 10 mph NE | 43% |
| Monday Night | 56°F | Chance Rain Showers | 5 to 10 mph NE | 30% |
| Tuesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 35% |
| Tuesday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Wednesday | 63°F | Chance Rain Showers | 15 mph NE | 32% |
| Wednesday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 40% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 36% |
| Thursday Night | 52°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 34% |
| Friday | 68°F | Chance Rain Showers | 10 mph N | 25% |
Forecast source: National Weather Service (api.weather.gov) for Newtown (40.228, -74.932). Updated through the day.
Growing snapshot for Newtown
Last spring frost
Apr 10
First fall frost
Nov 1
Growing season
202 days
Hardiness zone
7a
More local growing data for Newtown: nearby ZIP 18940 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Trenton Mercer Co Ap, Nj (6.5 mi from Newtown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.