National Weather Service Forecast for: Bethlehem PA
Issued by: National Weather Service Philadelphia, PA
Updated: 4:09 pm EDT Sep 12, 2026
 
Tonight

Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 66. East wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Slight Chance
Showers then
Showers
 Sunday

Sunday: Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and noon. Patchy fog before 10am. High near 82. Calm wind becoming northwest around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Showers and
Patchy Fog
then Mostly
Sunny
 Sunday
Night
Sunday Night: A chance of showers, mainly after 3am. Partly cloudy, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Clear
then Chance
Showers
 Monday

Monday: Mostly sunny, with a high near 73. North wind 10 to 15 mph.
Mostly Sunny

 Monday
Night
Monday Night: Mostly clear, with a low around 49. North wind around 5 mph.
Mostly Clear

 Tuesday

Tuesday: Sunny, with a high near 73.
Sunny

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 54.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny, with a high near 80.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 61.
Mostly Clear
Lo 66 °F Hi 82 °F Lo 63 °F Hi 73 °F Lo 49 °F Hi 73 °F Lo 54 °F Hi 80 °F Lo 61 °F

 

Tonight
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 66. East wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
 Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and noon. Patchy fog before 10am. High near 82. Calm wind becoming northwest around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
 
 A chance of showers, mainly after 3am. Partly cloudy, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday
 
 Mostly sunny, with a high near 73. North wind 10 to 15 mph.
Monday Night
 
 Mostly clear, with a low around 49. North wind around 5 mph.
Tuesday
 
 Sunny, with a high near 73.
Tuesday Night
 
 Mostly clear, with a low around 54.
Wednesday
 
 Mostly sunny, with a high near 80.
Wednesday Night
 
 Mostly clear, with a low around 61.
Thursday
 
 Mostly sunny, with a high near 83.
Thursday Night
 
 Partly cloudy, with a low around 63.
Friday
 
 A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Saturday
 
 Partly sunny, with a high near 77.

 

Forecast from NOAA-NWS for Bethlehem PA.