National Weather Service Forecast for: Allentown PA
Issued by: National Weather Service Philadelphia, PA
Updated: 4:07 am EDT Jun 22, 2026
 
Today

Today: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 1pm, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could be severe and produce heavy rainfall. Cloudy, with a high near 75. East wind 5 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely then
Severe
T-Storms
 Tonight

Tonight: Showers and thunderstorms before 5am, then a chance of showers. Some of the storms could be severe and produce heavy rainfall. Low around 64. Southeast wind 5 to 15 mph becoming northeast after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Severe
T-Storms
then Heavy
Rain
 Tuesday

Tuesday: A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 78. North wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Chance
Showers then
Mostly Sunny
 Tuesday
Night
Tuesday Night: Mostly cloudy, then becoming clear toward daybreak, with a low around 58. Northwest wind 5 to 10 mph.
Partly Cloudy

 Wednesday

Wednesday: Sunny, with a high near 82. Northwest wind 5 to 10 mph.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 59.
Mostly Clear

 Thursday

Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Mostly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Showers
Likely

 Friday

Friday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Chance
Showers then
Chance
T-storms
Hi 75 °F Lo 64 °F Hi 78 °F Lo 58 °F Hi 82 °F Lo 59 °F Hi 84 °F Lo 64 °F Hi 84 °F

 

Today
 
 Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 1pm, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could be severe and produce heavy rainfall. Cloudy, with a high near 75. East wind 5 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
 Showers and thunderstorms before 5am, then a chance of showers. Some of the storms could be severe and produce heavy rainfall. Low around 64. Southeast wind 5 to 15 mph becoming northeast after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
 
 A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 78. North wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Mostly cloudy, then becoming clear toward daybreak, with a low around 58. Northwest wind 5 to 10 mph.
Wednesday
 
 Sunny, with a high near 82. Northwest wind 5 to 10 mph.
Wednesday Night
 
 Mostly clear, with a low around 59.
Thursday
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Thursday Night
 
 A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Friday
 
 A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Friday Night
 
 A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Saturday
 
 Mostly sunny, with a high near 84.
Saturday Night
 
 Partly cloudy, with a low around 63.
Sunday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Allentown PA.