Harman US

Bethlehem, PA Weather & Growing Conditions

Overnight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. Northeast wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 54°F Partly Cloudy 5 mph NE 0%
Saturday 74°F Mostly Sunny 5 mph E 1%
Saturday Night 57°F Mostly Cloudy then Slight Chance Rain Showers 5 mph SE 21%
Sunday 71°F Rain Showers 5 to 10 mph S 96%
Sunday Night 56°F Showers And Thunderstorms 5 to 10 mph NW 84%
Monday 69°F Partly Sunny 5 to 10 mph NE 12%
Monday Night 49°F Mostly Cloudy then Chance Rain Showers 5 to 10 mph NE 31%
Tuesday 63°F Chance Rain Showers 10 mph NE 34%
Tuesday Night 48°F Chance Rain Showers 10 to 15 mph NE 32%
Wednesday 63°F Chance Rain Showers 15 mph NE 25%
Wednesday Night 48°F Chance Rain Showers 10 to 15 mph NE 33%
Thursday 63°F Chance Rain Showers 10 to 15 mph NE 33%
Thursday Night 48°F Chance Rain Showers 10 mph NE 33%
Friday 66°F Chance Rain Showers 10 mph N 26%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Bethlehem, PA

Last spring frost
Apr 21
First fall frost
Oct 22
Growing season
184 days
Hardiness zone
7a

Explore more for Bethlehem, PA: full frost dates · planting calendar · Pennsylvania frost dates

Climate data from the nearest NOAA station, Springtown 1 Nne, Pa (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.