TODAY NOV19
TEMPERATURE47
HUMIDITY90
PRESSURE30.05
WIND COND.
  • 4933Tue30%
  • 4525Wed
  • 3221
  • 3833Fri
  • 5245Sat50%70%
daynightWeather update from Wilmington, New Castle County Airport at

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New Castle Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January27°F43°F34°F3.3"
February26°F43°F34°F2.5"
March34°F54°F43°F3.7"
April44°F66°F54°F4.9"
May52°F74°F63°F3.2"
June64°F83°F73°F5.0"
July68°F87°F77°F5.6"
August67°F86°F76°F3.7"
September59°F79°F69°F4.1"
October48°F67°F57°F6.1"
November40°F57°F48°F3.3"
December30°F46°F38°F5.3"

Did you know?

  • The highest monthly average temperature in New Castle for July is 77 degrees.
  • The lowest monthly average temperature in New Castle for February is 34 degrees.
  • The most monthly precipitation in New Castle occurs in October with 6.1 inches.
  • The air quality index in New Castle is 14% worse than the national average.
  • The pollution index in New Castle is 57% better than the national average.

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Compare New Castle, DE Weather To Other Cities

New Castle air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexNew CastleDelawareNational
Air quality index574150
Pollution index2,169,6003,759,2125,066,862

New Castle air quality information

MeasurementTotal
Days measured365
Days with good air quality110
Days with moderate air quality244
Days w/ poor A.Q. for sensitive groups11
Days with unhealthy air quality

New Castle air quality information

PollutantTotal
Arsenic0.010%
Benzene0.030%
Carbon Tetrachloride0.002%
Lead0.010%
Mercury0.004%

Average monthly New Castle temperature with heat index

New Castle monthly precipitation with daily maximum

New Castle monthly snow depth with daily maximum

New Castle monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Quinton, NJ5493138%
Woodstown, NJ3,5483138%
Alloway, NJ1,4573138%
Salem, NJ4,9313138%
Shiloh, NJ3493138%
New Castle, DE5,3725714%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Fairport, NY5,3723628%
Northfield, IL5,3746020%
Berryville, AR5,3703628%
Post, TX5,3692648%
Bright, IN5,375548%
New Castle, DE5,3725714%
Source: The New Castle, DE weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.