Bethlehem, PA Weather & Growing Conditions
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 63°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 82°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph E | 54% |
| Wednesday Night | 70°F | Showers And Thunderstorms Likely | 0 mph | 58% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 70% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 70% |
| Friday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 54% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 54% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 43% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 43% |
| Sunday | 86°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 70°F | Mostly Clear | 0 to 5 mph SW | 12% |
| Monday | 88°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 16% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 16% |
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 (2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.