TODAY DEC21
TEMPERATURE47
HUMIDITY93
PRESSURE102070
WIND COND.140 14.8
  • 6252Sun50%30%
  • 6453Mon30%
  • 5945Tue100%
  • 5545
  • 5547Thu
daynightWeather update from Modesto City-County Airport - Harry Sham Field at
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Weather Quick Facts

  • The highest monthly average temperature in Modesto for July is 80.2 degrees
  • The lowest monthly average temperature in Modesto for January is 46.9 degrees
  • The most monthly precipitation in Modesto occurs in January with 2.4 inches
  • The air quality index in Modesto is 16% worse than the national average
  • The pollution index in Modesto is 185% worse than the national average

Compare Modesto, CA Weather

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      Modesto 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°F58°F47°F2.4"
      February42°F64°F52°F1.9"
      March46°F70°F57°F1.7"
      April49°F76°F61°F1.3"
      May54°F85°F69°F0.4"
      June60°F93°F76°F0.2"
      July64°F98°F80°F0.0"
      August63°F96°F78°F0.0"
      September59°F91°F74°F0.1"
      October52°F80°F64°F0.7"
      November44°F68°F54°F1.1"
      December38°F58°F47°F2.3"

      Modesto 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.
      IndexModestoCaliforniaNational
      Air quality index495542
      Pollution index7,774,44010,473,1902,726,193

      Modesto air quality

      MeasurementTotal
      Days measured365
      Days with good air quality201
      Days with moderate air quality141
      Days w/ poor A.Q. for sensitive groups22
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.090%
      Carbon Tetrachloride0.000%
      Lead0.050%
      Mercury0.040%

      Average monthly Modesto temperature with heat index

      Modesto monthly precipitation with daily maximum

      Modesto monthly snow depth with daily maximum

      Modesto monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lathrop, CA23,8634510.0%
      Manteca, CA81,0784510.0%
      Delhi, CA11,837484.0%
      Del Rio, CA1,241492.0%
      Ripon, CA16,049492.0%
      Modesto, CA214,485492.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Enterprise, NV214,591548.0%
      Richmond Hill, ON215,407n/a 
      Des Moines, IA215,4083922.0%
      Tacoma, WA215,7661864.0%
      Fontana, CA212,7048978.0%
      Modesto, CA214,485492.0%
      Source: The Modesto, 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.