TODAY NOV21
TEMPERATURE48
HUMIDITY89
PRESSURE
WIND COND.112 4.8
  • 5749Fri100%100%
  • 5643Sat80%50%
  • 5447Sun60%
  • 5546Mon
  • 5544Tue
daynightWeather update from PILOT HILL at
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Weather Quick Facts

  • The highest monthly average temperature in Newcastle for July is 79 degrees
  • The lowest monthly average temperature in Newcastle for December is 45.7 degrees
  • The most monthly precipitation in Newcastle occurs in January with 10.1 inches
  • The air quality index in Newcastle is 24% worse than the national average
  • The pollution index in Newcastle is 57% worse than the national average

Compare Newcastle, CA Weather

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      Newcastle 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
      January38°F57°F47°F10.1"
      February41°F62°F51°F8.0"
      March44°F67°F55°F8.4"
      April46°F74°F59°F4.6"
      May53°F83°F68°F2.6"
      June58°F91°F75°F2.6"
      July62°F96°F79°F0.2"
      August60°F95°F77°F0.4"
      September57°F90°F73°F1.3"
      October50°F79°F63°F4.8"
      November43°F65°F53°F7.5"
      December37°F56°F46°F9.8"

      Newcastle 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.
      IndexNewcastleCaliforniaNational
      Air quality index525542
      Pollution index4,289,31010,473,1902,726,193

      Newcastle air quality

      MeasurementTotal
      Days measured365
      Days with good air quality171
      Days with moderate air quality173
      Days w/ poor A.Q. for sensitive groups21
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.050%
      Benzene0.070%
      Carbon Tetrachloride0.001%
      Lead0.060%
      Mercury0.010%

      Average monthly Newcastle temperature with heat index

      Newcastle monthly precipitation with daily maximum

      Newcastle monthly snow depth with daily maximum

      Newcastle monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lake of the Pines, CA4,3504412.0%
      Meadow Vista, CA3,5084412.0%
      Sheridan, CA1,1204412.0%
      Folsom, CA79,584524.0%
      North Highlands, CA48,660524.0%
      Newcastle, CA1,360524.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Hays, NC1,3602648.0%
      Gillam, MB1,360n/a 
      Garberville, CA1,3612746.0%
      Sanborn, IA1,3593628.0%
      Dayton, IN1,3594216.0%
      Newcastle, CA1,360524.0%
      Source: The Newcastle, CA 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.