TODAY NOV21
TEMPERATURE58
HUMIDITY36
PRESSURE102000
WIND COND.140 13
  • 6355Fri80%100%
  • 6046Sat80%50%
  • 5749Sun60%
  • 6048Mon
  • 6047Tue
daynightWeather update from Modesto City-County Airport - Harry Sham Field at
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Weather Quick Facts

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

Compare Bystrom, CA Weather

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      Bystrom 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"

      Bystrom 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.
      IndexBystromCaliforniaNational
      Air quality index495542
      Pollution index7,774,44010,473,1902,726,193

      Bystrom 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 Bystrom temperature with heat index

      Bystrom monthly precipitation with daily maximum

      Bystrom monthly snow depth with daily maximum

      Bystrom monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Manteca, CA81,0784510.0%
      Delhi, CA11,837484.0%
      Del Rio, CA1,241492.0%
      Ripon, CA16,049492.0%
      Cowan, CA472492.0%
      Bystrom, CA3,763492.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Burney, CA3,7634216.0%
      India Hook, SC3,762492.0%
      Whitmore Village, HI3,7643040.0%
      Sunshine Coast E, BC3,764n/a 
      South Russell, OH3,76150= 100
      Bystrom, CA3,763492.0%
      Source: The Bystrom, 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.