Newtown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newtown, a borough in Bucks County, Pennsylvania.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. Northeast wind 0 to 5 mph.
7-day forecast for Newtown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tonight | 66°F | Mostly Cloudy | 0 mph | 3% |
| Wednesday | 85°F | Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph E | 45% |
| Wednesday Night | 72°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 74% |
| Thursday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SW | 26% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 33% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 43% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Saturday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 15% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph W | 15% |
| Monday | 91°F | Sunny | 5 to 10 mph W | 9% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 17% |
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
Nearby towns & communities
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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 Aug 4, 2026.