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Johnstonville Average Weather

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
January19°F47°F31°Fn/a
February25°F51°F37°Fn/a
March30°F58°F43°Fn/a
April31°F63°F47°Fn/a
May40°F70°F55°Fn/a
June48°F80°F65°Fn/a
July56°F90°F74°Fn/a
August51°F86°F70°Fn/a
September47°F79°F63°Fn/a
October34°F68°F50°Fn/a
November28°F55°F40°Fn/a
December19°F44°F30°Fn/a

Did you know?

  • The highest monthly average temperature in Johnstonville for July is 74 degrees.
  • The lowest monthly average temperature in Johnstonville for December is 30 degrees.
  • The most monthly precipitation in Johnstonville occurs in January with 0 inches.
  • The air quality index in Johnstonville is 0% worse than the national average.
  • The pollution index in Johnstonville is 64% better than the national average.

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Compare Johnstonville, CA Weather To Other Cities

Johnstonville 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.
IndexJohnstonvilleCaliforniaNational
Air quality index505550
Pollution index1,799,83018,106,7265,066,862

Johnstonville air quality information

MeasurementTotal
Days measured365
Days with good air quality185
Days with moderate air quality148
Days w/ poor A.Q. for sensitive groups14
Days with unhealthy air quality4

Johnstonville air quality information

PollutantTotal
Arsenic0.010%
Benzene0.030%
Carbon Tetrachloride0.000%
Lead0.010%
Mercury0.004%

Average monthly Johnstonville temperature with heat index

Johnstonville monthly precipitation with daily maximum

Johnstonville monthly snow depth with daily maximum

Johnstonville monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Susanville, CA15,55550= 100
Janesville, CA1,28350= 100
Litchfield, CA14350= 100
Johnstonville, CA1,18350= 100

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Mitchell, IL1,1836020%
Gilbert, IA1,1833726%
Dover Beaches South, NJ1,1834020%
Newburg, WI1,1834510%
Hart, TX1,1832648%
Johnstonville, CA1,18350= 100
Source: The Johnstonville, 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.