TODAY DEC29
TEMPERATURE34
HUMIDITY
PRESSURE
WIND COND.293 12.9
  • 4123Sun70%
  • 3017Mon40%30%
  • 2312Tue30%
  • 2210
  • 188Thu
daynightWeather update from Hays Site MT-66 MP 10.5 at
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Weather Quick Facts

  • The highest monthly average temperature in Hays for July is 71 degrees
  • The lowest monthly average temperature in Hays for December is 23.8 degrees
  • The most monthly precipitation in Hays occurs in June with 4.5 inches
  • The air quality index in Hays is 50% better than the national average
  • The pollution index in Hays is 91% better than the national average

Compare Hays, MT Weather

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      Hays 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
      January16°F37°F26°F0.8"
      February18°F40°F28°F1.1"
      March27°F52°F39°F0.8"
      April33°F60°F46°F2.6"
      May38°F64°F51°F3.6"
      June50°F78°F65°F4.5"
      July55°F86°F71°F4.0"
      August53°F84°F69°F1.6"
      September46°F73°F60°F3.4"
      October37°F62°F49°F3.5"
      November24°F47°F35°F1.6"
      December14°F34°F24°F1.1"

      Hays 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.
      IndexHaysMontanaNational
      Air quality index213442
      Pollution index232,374834,4732,726,193

      Hays air quality

      MeasurementTotal
      Days measured363
      Days with good air quality350
      Days with moderate air quality12
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

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

      Average monthly Hays temperature with heat index

      Hays monthly precipitation with daily maximum

      Hays monthly snow depth with daily maximum

      Hays monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Zortman, MT332158.0%
      Lodge Pole, MT3442158.0%
      Hays, MT9472158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Susan Moore, AL9474314.0%
      Otisville, MI9473824.0%
      Grantwood Village, MO947548.0%
      Waverly, MO947476.0%
      Newark Valley, NY9473432.0%
      Hays, MT9472158.0%
      Source: The Hays, MT 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.