National Weather Service Forecast for: Upper Darby PA
Issued by: National Weather Service Philadelphia, PA
Updated: 6:05 pm EST Dec 17, 2025
 
Overnight

Overnight: Patchy freezing fog. Mostly cloudy, with a low around 26. North wind around 5 mph.
Patchy
Freezing Fog

 Thursday

Thursday: Patchy fog between 9am and 10am. Patchy freezing fog before 9am. Otherwise, partly sunny, with a high near 45. Southeast wind 5 to 10 mph.
Patchy
Freezing Fog
and Patchy
Fog then
Mostly Cloudy
 Thursday
Night
Thursday Night: Rain, with thunderstorms also possible after 4am. Temperature rising to around 56 by 5am. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Rain and
Breezy

 Friday

Friday: Showers likely and possibly a thunderstorm before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 56. Breezy, with a south wind 15 to 20 mph becoming west in the morning. Winds could gust as high as 45 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely and
Breezy

 Friday
Night
Friday Night: Mostly clear, with a low around 26. West wind 5 to 15 mph, with gusts as high as 40 mph.
Mostly Clear


 Saturday

Saturday: Mostly sunny, with a high near 39.
Mostly Sunny


 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 34.
Mostly Cloudy


 Sunday

Sunday: Mostly sunny, with a high near 47.
Mostly Sunny


 Sunday
Night
Sunday Night: Mostly clear, with a low around 26.
Mostly Clear
Lo 26 °F Hi 45 °F Lo 42 °F⇑ Hi 56 °F Lo 26 °F Hi 39 °F Lo 34 °F Hi 47 °F Lo 26 °F

Wind Advisory
 

Overnight
 
 Patchy freezing fog. Mostly cloudy, with a low around 26. North wind around 5 mph.
Thursday
 
 Patchy fog between 9am and 10am. Patchy freezing fog before 9am. Otherwise, partly sunny, with a high near 45. Southeast wind 5 to 10 mph.
Thursday Night
 
 Rain, with thunderstorms also possible after 4am. Temperature rising to around 56 by 5am. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
 
 Showers likely and possibly a thunderstorm before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 56. Breezy, with a south wind 15 to 20 mph becoming west in the morning. Winds could gust as high as 45 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
 
 Mostly clear, with a low around 26. West wind 5 to 15 mph, with gusts as high as 40 mph.
Saturday
 
 Mostly sunny, with a high near 39.
Saturday Night
 
 Mostly cloudy, with a low around 34.
Sunday
 
 Mostly sunny, with a high near 47.
Sunday Night
 
 Mostly clear, with a low around 26.
Monday
 
 Sunny, with a high near 37.
Monday Night
 
 Partly cloudy, with a low around 26.
Tuesday
 
 A chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 30%.
Tuesday Night
 
 Mostly cloudy, with a low around 33.
Wednesday
 
 Mostly sunny, with a high near 44.

 

Forecast from NOAA-NWS for Upper Darby PA.