TODAY MAR28
TEMPERATURE54
HUMIDITY46
PRESSURE
WIND COND.211 22.5
  • 5433Fri
  • 5735Sat
  • 6138Sun
  • 6642Mon
  • 7144Tue
daynightWeather update from SPRING CANYON at
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Weather Quick Facts

  • The highest monthly average temperature in Hartline for July is 77.6 degrees
  • The lowest monthly average temperature in Hartline for December is 26.4 degrees
  • The most monthly precipitation in Hartline occurs in December with 1.2 inches
  • The air quality index in Hartline is 57% better than the national average
  • The pollution index in Hartline is 2% better than the national average

Compare Hartline, WA Weather

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      Hartline 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
      January22°F36°F28°F0.8"
      February27°F45°F35°F0.5"
      March32°F55°F43°F0.6"
      April38°F64°F50°F0.5"
      May47°F75°F61°F0.8"
      June54°F81°F67°F0.9"
      July62°F92°F78°F0.1"
      August59°F89°F74°F0.1"
      September50°F80°F65°F0.2"
      October39°F63°F50°F0.6"
      November30°F46°F38°F1.0"
      December19°F34°F26°F1.2"

      Hartline 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.
      IndexHartlineWashingtonNational
      Air quality index183642
      Pollution index2,683,4104,541,8502,726,193

      Hartline air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality339
      Days with moderate air quality26
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Hartline air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.040%
      Carbon Tetrachloride0.004%
      Lead0.030%
      Mercury0.000%

      Average monthly Hartline temperature with heat index

      Hartline monthly precipitation with daily maximum

      Hartline monthly snow depth with daily maximum

      Hartline monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Almira, WA2671864.0%
      Banks Lake South, WA1131864.0%
      Coulee City, WA5791864.0%
      Hartline, WA1821864.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Fort Green, FL1823628.0%
      Green Mountain, IA1823922.0%
      St. Marys, IA1823922.0%
      Berlin, IL1824020.0%
      Minden City, MI1822648.0%
      Hartline, WA1821864.0%
      Source: The Hartline, WA 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.