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Key findings

  • The highest monthly average temperature in Gresham for August is 69 degrees
  • The lowest monthly average temperature in Gresham for December is 40 degrees
  • The most monthly precipitation in Gresham occurs in November with 6.5 inches
  • The air quality index in Gresham is 24% better than the national average
  • The pollution index in Gresham is 378% worse than the national average

Compare Gresham, OR Weather

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      Gresham 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
      January36°F46°F40°F4.7"
      February38°F51°F44°F3.2"
      March40°F57°F47°F5.2"
      April42°F63°F51°F3.6"
      May48°F71°F58°F2.8"
      June53°F76°F63°F2.1"
      July56°F84°F69°F0.5"
      August56°F85°F69°F0.4"
      September52°F78°F64°F1.6"
      October46°F65°F55°F4.5"
      November42°F53°F47°F6.5"
      December35°F45°F40°F5.1"

      Gresham 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.
      IndexGreshamOregonNational
      Air quality index383250
      Pollution index24,235,4005,374,5275,066,862

      Gresham air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality285
      Days with moderate air quality77
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      Gresham air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.250%
      Carbon Tetrachloride0.060%
      Lead0.160%
      Mercury0.090%

      Average monthly Gresham temperature with heat index

      Gresham monthly precipitation with daily maximum

      Gresham monthly snow depth with daily maximum

      Gresham monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Johnson City, OR5473824%
      Oak Grove, OR16,8483824%
      Rivergrove, OR4383824%
      West Linn, OR26,2423824%
      Felida, WA7,8573824%
      Gresham, OR110,0423824%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Lowell, MA109,8713726%
      Manchester, NH110,2313726%
      Brandon, FL109,7844314%
      Waterbury, CT109,2114118%
      West Jordan, UT110,928512%
      Gresham, OR110,0423824%
      Source: The Gresham, 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.