TODAY MAY15
TEMPERATURE83
HUMIDITY33
PRESSURE29.78
WIND COND. 7.6
  • 8045Sun
  • 8146Mon
  • 8143Tue
  • 7439Wed
  • 7238Thu
daynightWeather update from Ukiah, Ukiah Municipal Airport at

Key findings

  • The highest monthly average temperature in Middletown for July is 64.9 degrees
  • The lowest monthly average temperature in Middletown for December is 46.1 degrees
  • The most monthly precipitation in Middletown occurs in December with 6.9 inches
  • The air quality index in Middletown is 38% better than the national average
  • The pollution index in Middletown is 93% better than the national average

Compare Middletown, CA Weather

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      Middletown 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
      January36°F60°F46°F6.0"
      February39°F64°F50°F5.7"
      March41°F67°F52°F4.6"
      April43°F71°F55°F2.4"
      May46°F77°F60°F1.1"
      June50°F83°F64°F0.4"
      July52°F85°F65°F0.0"
      August52°F84°F64°F0.0"
      September49°F85°F64°F0.2"
      October46°F78°F59°F2.0"
      November41°F67°F52°F3.2"
      December36°F59°F46°F6.9"

      Middletown 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.
      IndexMiddletownCaliforniaNational
      Air quality index315550
      Pollution index360,23818,106,7265,066,862

      Middletown air quality information

      MeasurementTotal
      Days measured360
      Days with good air quality360
      Days with moderate air quality0
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Middletown air quality information

      PollutantTotal
      Arsenic0.002%
      Benzene0.004%
      Carbon Tetrachloride0.000%
      Lead0.002%
      Mercury0.000%

      Average monthly Middletown temperature with heat index

      Middletown monthly precipitation with daily maximum

      Middletown monthly snow depth with daily maximum

      Middletown monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Cobb, CA1,1223138%
      Lower Lake, CA1,5583138%
      Hidden Valley Lake, CA5,6183138%
      Clearlake, CA15,0703138%
      Clearlake Riviera, CA3,2043138%
      Middletown, CA7713138%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Orderville, UT7714412%
      Deer Creek, IL7714118%
      Elizabeth, IL7712942%
      Glasgow, WV7714020%
      Daisetta, TX7714510%
      Middletown, CA7713138%
      Source: The Middletown, 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.