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Johnstown 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
January-13°F68°F30°Fn/a
February-6°F66°F28°Fn/a
March0°F75°F37°Fn/a
April19°F84°F50°Fn/a
May28°F90°F58°Fn/a
June37°F93°F67°Fn/a
July45°F93°F70°Fn/a
August48°F93°F70°Fn/a
September37°F90°F63°Fn/a
October27°F84°F51°Fn/a
November10°F72°F42°Fn/a
December1°F70°F32°Fn/a

Did you know?

  • The highest monthly average temperature in Johnstown for July is 70 degrees.
  • The lowest monthly average temperature in Johnstown for February is 28 degrees.
  • The most monthly precipitation in Johnstown occurs in January with 0 inches.
  • The air quality index in Johnstown is 9% better than the national average.
  • The pollution index in Johnstown is 41% better than the national average.

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Compare Johnstown, PA Weather To Other Cities

Johnstown 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.
IndexJohnstownPennsylvaniaNational
Air quality index454550
Pollution index2,970,5104,327,9925,066,862

Johnstown air quality information

MeasurementTotal
Days measured365
Days with good air quality219
Days with moderate air quality144
Days w/ poor A.Q. for sensitive groups2
Days with unhealthy air quality

Johnstown air quality information

PollutantTotal
Arsenic0.002%
Benzene0.050%
Carbon Tetrachloride0.010%
Lead0.650%
Mercury0.001%

Average monthly Johnstown temperature with heat index

Johnstown monthly precipitation with daily maximum

Johnstown monthly snow depth with daily maximum

Johnstown monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Jennerstown, PA5543236%
Boswell, PA1,2713236%
Laurel Mountain, PA2023236%
Black Lick, PA1,9293628%
Graceton, PA1453628%
Johnstown, PA20,1694510%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Cartersville, GA20,169524%
Ferndale, MI20,167524%
Lorton, VA20,173492%
Murrysville, PA20,1595612%
Simpsonville, SC20,1834020%
Johnstown, PA20,1694510%
Source: The Johnstown, PA 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.