National Weather Service Forecast for: Harrington DE
Issued by: National Weather Service Philadelphia, PA
Updated: 4:07 am EDT Jun 22, 2026
 
Overnight

Overnight: A slight chance of showers. Mostly cloudy, with a low around 64. East wind around 5 mph. Chance of precipitation is 20%.
Slight Chance
Showers

 Monday

Monday: A chance of showers, mainly after 4pm. The rain could be heavy at times. Cloudy, then gradually becoming mostly sunny, with a high near 91. Breezy, with a south wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 30%. New precipitation amounts between a half and three quarters of an inch possible.
Heavy Rain
and Breezy

 Monday
Night
Monday Night: Showers and thunderstorms before 5am, then a chance of showers. Some of the storms could be severe and produce heavy rainfall. Low around 69. Southeast wind 5 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Severe
T-Storms
then Heavy
Rain
 Tuesday

Tuesday: Showers likely before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then a slight chance of showers after 3pm. Partly sunny, with a high near 82. North wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 63. Northwest wind 10 to 15 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 85.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 63.
Mostly Clear

 Thursday

Thursday: Mostly sunny, with a high near 88.
Mostly Sunny

 Thursday
Night
Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
Chance
T-storms
Lo 64 °F Hi 91 °F Lo 69 °F Hi 82 °F Lo 63 °F Hi 85 °F Lo 63 °F Hi 88 °F Lo 69 °F

 

Overnight
 
 A slight chance of showers. Mostly cloudy, with a low around 64. East wind around 5 mph. Chance of precipitation is 20%.
Monday
 
 A chance of showers, mainly after 4pm. The rain could be heavy at times. Cloudy, then gradually becoming mostly sunny, with a high near 91. Breezy, with a south wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 30%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
 
 Showers and thunderstorms before 5am, then a chance of showers. Some of the storms could be severe and produce heavy rainfall. Low around 69. Southeast wind 5 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
 
 Showers likely before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then a slight chance of showers after 3pm. Partly sunny, with a high near 82. North wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
 
 Mostly clear, with a low around 63. Northwest wind 10 to 15 mph.
Wednesday
 
 Sunny, with a high near 85.
Wednesday Night
 
 Mostly clear, with a low around 63.
Thursday
 
 Mostly sunny, with a high near 88.
Thursday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
Friday
 
 A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 50%.
Friday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
Saturday
 
 A chance of showers. Partly sunny, with a high near 88. Chance of precipitation is 30%.
Saturday Night
 
 Mostly cloudy, with a low around 69.
Sunday
 
 Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Harrington DE.