New Britain, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Britain, a borough in Bucks County, Pennsylvania.
Tonight
59°F
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 5am. Mostly cloudy, with a low around 59. Southeast wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for New Britain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SE | 19% |
| Sunday | 76°F | Rain Showers | 5 to 10 mph SE | 84% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely then Mostly Cloudy | 5 to 10 mph W | 73% |
| Monday | 70°F | Partly Sunny then Chance Rain Showers | 5 to 10 mph NE | 27% |
| Monday Night | 52°F | Chance Rain Showers | 5 to 10 mph NE | 31% |
| Tuesday | 65°F | Chance Rain Showers | 10 mph NE | 38% |
| Tuesday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 38% |
| Wednesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 22% |
| Wednesday Night | 50°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Thursday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 26% |
| Thursday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Friday | 66°F | Chance Rain Showers | 10 to 15 mph N | 33% |
| Friday Night | 50°F | Chance Rain Showers | 10 to 15 mph N | 33% |
| Saturday | 69°F | Chance Rain Showers | 10 to 15 mph N | 29% |
Forecast source: National Weather Service (api.weather.gov) for New Britain (40.300, -75.178). Updated through the day.
Growing snapshot for New Britain
Last spring frost
Apr 13
First fall frost
Oct 30
Growing season
198 days
Hardiness zone
7a
More local growing data for New Britain: nearby ZIP 18901 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Blooming Glen
Bristol
Brittany Farms-The Highlands
Chalfont
Churchville
Cornwells Heights
Croydon
Doylestown
Dublin
Eddington
Fairless Hills
Feasterville
Hulmeville
Ivyland
Langhorne
Langhorne Manor
Levittown
Milford Square
New Hope
Newtown
Newtown Grant
Parkland
Penndel
Perkasie
Plumsteadville
Quakertown
Richboro
Richlandtown
Riegelsville
Sellersville
Climate data from the nearest NOAA station, Doylestown Ap, Pa (2.3 mi from New Britain). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.