TODAY DEC21
TEMPERATURE42
HUMIDITY82
PRESSURE98980
WIND COND.
  • 3632Sun100%90%
  • 3530Mon100%90%
  • 3328Tue90%
  • 3328
  • 3225Thu
daynightWeather update from Portage, Portage Glacier at
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Weather Quick Facts

  • The highest monthly average temperature in Portage Valley for July is 60.2 degrees
  • The lowest monthly average temperature in Portage Valley for January is 16.4 degrees
  • The most monthly precipitation in Portage Valley occurs in September with 3.5 inches
  • The air quality index in Portage Valley is 26% better than the national average
  • The pollution index in Portage Valley is 162% worse than the national average

Compare Anchorage, AK Weather

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      Portage Valley 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
      January9°F24°F16°F0.5"
      February12°F29°F21°F0.5"
      March15°F35°F25°F0.6"
      April30°F48°F39°F0.4"
      May41°F60°F50°F0.5"
      June49°F66°F57°F1.1"
      July54°F69°F60°F1.9"
      August51°F66°F58°F2.9"
      September43°F58°F50°F3.5"
      October31°F45°F37°F1.5"
      November14°F29°F22°F0.6"
      December11°F26°F19°F0.8"

      Portage Valley 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.
      IndexPortage ValleyAnchorageAlaska
      Air quality index313130
      Pollution index7,145,4407,145,44011,243,194

      Portage Valley air quality

      MeasurementTotal
      Days measured365
      Days with good air quality262
      Days with moderate air quality92
      Days w/ poor A.Q. for sensitive groups7
      Days with unhealthy air quality4

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.130%
      Carbon Tetrachloride0.020%
      Lead0.140%
      Mercury0.001%

      Average monthly Portage Valley temperature with heat index

      Portage Valley monthly precipitation with daily maximum

      Portage Valley monthly snow depth with daily maximum

      Portage Valley monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Whittier, AK2553138.0%
      Anchorage, AK292,0903138.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Gatineau, QC293,695n/a 
      Greensboro, NC294,3954314.0%
      Plano, TX288,870512.0%
      Lincoln, NE286,3883138.0%
      Orlando, FL284,8173922.0%
      Anchorage, AK292,0903138.0%
      Source: The Portage Valley, Anchorage, AK 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.