TODAY NOV21
TEMPERATURE26
HUMIDITY74
PRESSURE102370
WIND COND.310 22.3
  • 2816Fri
  • 2617Sat20%
  • 2713Sun60%40%
  • 205Mon20%
  • 155Tue
daynightWeather update from Grand Forks, Grand Forks International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Portland for July is 72 degrees
  • The lowest monthly average temperature in Portland for January is 7.4 degrees
  • The most monthly precipitation in Portland occurs in May with 8.9 inches
  • The air quality index in Portland is 22% better than the national average
  • The pollution index in Portland is 94% better than the national average

Compare Portland, ND Weather

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      Portland 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
      January-1°F18°F7°F1.0"
      February2°F19°F10°F0.4"
      March18°F37°F26°F1.8"
      April33°F58°F44°F2.3"
      May47°F68°F57°F8.9"
      June59°F77°F68°F7.4"
      July61°F82°F72°F3.8"
      August57°F79°F68°F6.4"
      September48°F73°F60°F2.5"
      October38°F57°F47°F6.6"
      November23°F39°F30°F2.3"
      December6°F21°F14°F1.2"

      Portland 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.
      IndexPortlandNorth DakotaNational
      Air quality index333542
      Pollution index151,1831,038,6652,726,193

      Portland air quality

      MeasurementTotal
      Days measured363
      Days with good air quality327
      Days with moderate air quality34
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.002%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Portland temperature with heat index

      Portland monthly precipitation with daily maximum

      Portland monthly snow depth with daily maximum

      Portland monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Mayville, ND1,8923334.0%
      Hillsboro, ND1,6273334.0%
      Buxton, ND4313334.0%
      Blanchard, ND103334.0%
      Reynolds, ND2983334.0%
      Portland, ND6663334.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Western Grove, AR6663628.0%
      Sky Valley, GA6664118.0%
      Pilot Grove, MO6663824.0%
      Mount Victory, OH6663922.0%
      Boykins, VA6663628.0%
      Portland, ND6663334.0%
      Source: The Portland, ND 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.