TODAY APR12
TEMPERATURE56
HUMIDITY60
PRESSURE99700
WIND COND.220 29.5
  • 5240Sat50%
  • 7454Sun40%
  • 7044Mon
  • 7153Tue
  • 7057Wed50%60%
daynightWeather update from Selinsgrove Penn Valley Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Northumberland for July is 73.8 degrees
  • The lowest monthly average temperature in Northumberland for January is 29.1 degrees
  • The most monthly precipitation in Northumberland occurs in July with 4.7 inches
  • The air quality index in Northumberland is 17% better than the national average
  • The pollution index in Northumberland is 33% worse than the national average

Compare Northumberland, PA Weather

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      Northumberland 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
      January20°F38°F29°F2.4"
      February20°F40°F30°F1.9"
      March29°F51°F39°F2.6"
      April39°F65°F52°F3.4"
      May49°F75°F61°F3.8"
      June59°F83°F71°F3.9"
      July62°F86°F74°F4.7"
      August60°F84°F71°F4.2"
      September53°F78°F64°F4.4"
      October43°F66°F53°F4.5"
      November32°F54°F42°F3.0"
      December26°F43°F34°F3.2"

      Northumberland 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.
      IndexNorthumberlandPennsylvaniaNational
      Air quality index354542
      Pollution index3,637,0204,584,8052,726,193

      Northumberland air quality information

      MeasurementTotal
      Days measured361
      Days with good air quality340
      Days with moderate air quality21
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Northumberland air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.030%
      Carbon Tetrachloride0.004%
      Lead0.010%
      Mercury0.002%

      Average monthly Northumberland temperature with heat index

      Northumberland monthly precipitation with daily maximum

      Northumberland monthly snow depth with daily maximum

      Northumberland monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      West Milton, PA1,1523530.0%
      Montandon, PA8923530.0%
      Kreamer, PA6553530.0%
      Selinsgrove, PA5,9233530.0%
      Elysburg, PA2,1473530.0%
      Northumberland, PA3,7323530.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Albia, IA3,7323922.0%
      Larned, KS3,7321570.0%
      Stanley, NC3,7343628.0%
      San Andreas, CA3,7293922.0%
      Collinsville, CT3,7293726.0%
      Northumberland, PA3,7323530.0%
      Source: The Northumberland, PA 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.