TODAY OCT21
TEMPERATURE56
HUMIDITY77
PRESSURE30.25
WIND COND.210 11.4
  • 6245Tue70%
  • 6144Wed
  • 6346Thu
  • 6244Fri
  • 5740Sat
daynightWeather update from Portland, Portland-Troutdale Airport at
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Centennial 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
January34°F48°F40°F4.9"
February36°F53°F43°F3.4"
March39°F58°F48°F4.8"
April42°F63°F52°F3.0"
May48°F71°F58°F2.8"
June53°F76°F63°F1.7"
July57°F84°F69°F0.5"
August58°F85°F70°F0.5"
September53°F78°F64°F1.8"
October47°F66°F55°F3.7"
November40°F55°F47°F6.2"
December34°F47°F40°F6.2"

Did you know?

  • The highest monthly average temperature in Centennial for August is 70 degrees.
  • The lowest monthly average temperature in Centennial for December is 40 degrees.
  • The most monthly precipitation in Centennial occurs in November with 6.2 inches.
  • The air quality index in Centennial is 24% better than the national average.
  • The pollution index in Centennial is 378% worse than the national average.

Compare Portland, OR Weather To Other Cities

Centennial 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.
IndexCentennialPortlandOregon
Air quality index383832
Pollution index24,235,4001,899,4105,374,527

Centennial air quality information

MeasurementTotal
Days measured365
Days with good air quality241
Days with moderate air quality108
Days w/ poor A.Q. for sensitive groups12
Days with unhealthy air quality4

Centennial air quality information

PollutantTotal
Arsenic0.003%
Benzene0.020%
Carbon Tetrachloride0.010%
Lead0.010%
Mercury0.002%

Average monthly Centennial temperature with heat index

Centennial monthly precipitation with daily maximum

Centennial monthly snow depth with daily maximum

Centennial monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Damascus, OR10,8423824%
Garden Home-Whitford, OR6,2913824%
Jennings Lodge, OR7,7273824%
Maywood Park, OR9393824%
Oatfield, OR13,5923824%
Portland, OR620,5893824%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Baltimore, MD621,000468%
Oklahoma City, OK620,015476%
Las Vegas, NV613,295548%
Louisville, KY611,5735510%
Milwaukee, WI598,6724510%
Portland, OR620,5893824%
Source: The Centennial, Portland, OR 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.
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