TODAY MAY12
TEMPERATURE69
HUMIDITY
PRESSURE
WIND COND.297 8
  • 9659Wed
  • 9559Thu
  • 9357Fri
  • 9160Sat
  • 9456Sun
daynightWeather update from SAC NWR at

Key findings

  • The highest monthly average temperature in Williams for July is 78.4 degrees
  • The lowest monthly average temperature in Williams for December is 46 degrees
  • The most monthly precipitation in Williams occurs in December with 3.6 inches
  • The air quality index in Williams is 12% better than the national average
  • The pollution index in Williams is 60% better than the national average

Compare Williams, CA Weather

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      Williams 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
      January37°F58°F46°F3.5"
      February40°F63°F51°F3.4"
      March44°F68°F55°F3.2"
      April47°F75°F60°F1.9"
      May52°F84°F67°F0.7"
      June58°F93°F75°F0.4"
      July61°F98°F78°F0.0"
      August59°F96°F76°F0.0"
      September56°F92°F72°F0.2"
      October49°F80°F63°F1.2"
      November42°F66°F53°F2.1"
      December37°F57°F46°F3.6"

      Williams 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.
      IndexWilliamsCaliforniaNational
      Air quality index445550
      Pollution index2,024,69018,106,7265,066,862

      Williams air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality239
      Days with moderate air quality124
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Williams air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.020%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.020%

      Average monthly Williams temperature with heat index

      Williams monthly precipitation with daily maximum

      Williams monthly snow depth with daily maximum

      Williams monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Maxwell, CA9184412%
      College City, CA2064412%
      Arbuckle, CA3,2444412%
      Colusa, CA5,9354412%
      Grimes, CA2844412%
      Williams, CA5,1604412%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Daleville, AL5,1603530%
      Summerside, OH5,161548%
      Livingston, TX5,1614510%
      Broadmoor, CA5,1594314%
      Winterset, IA5,1583922%
      Williams, CA5,1604412%
      Source: The Williams, 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.