TODAY MAR19
TEMPERATURE43
HUMIDITY97
PRESSURE101830
WIND COND.
  • 7043Tue
  • 5547Wed30%50%
  • 5646Thu60%40%
  • 5744Fri
  • 5443Sat
daynightWeather update from Southwest Washington Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Kelso for August is 65.7 degrees
  • The lowest monthly average temperature in Kelso for December is 39.3 degrees
  • The most monthly precipitation in Kelso occurs in December with 8.9 inches
  • The air quality index in Kelso is 57% better than the national average
  • The pollution index in Kelso is 55% worse than the national average

Compare Kelso, WA Weather

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      Kelso 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
      January35°F47°F40°F8.3"
      February36°F52°F42°F5.4"
      March40°F56°F46°F6.0"
      April41°F62°F50°F4.8"
      May47°F69°F56°F5.7"
      June52°F73°F60°F3.6"
      July55°F80°F65°F2.1"
      August55°F81°F66°F2.8"
      September51°F75°F61°F5.1"
      October46°F63°F53°F6.4"
      November40°F52°F45°F8.2"
      December35°F45°F39°F8.9"

      Kelso 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.
      IndexKelsoWashingtonNational
      Air quality index183642
      Pollution index4,215,4104,541,8502,726,193

      Kelso air quality information

      MeasurementTotal
      Days measured360
      Days with good air quality338
      Days with moderate air quality22
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Kelso air quality information

      PollutantTotal
      Arsenic0.005%
      Benzene0.050%
      Carbon Tetrachloride0.004%
      Lead0.030%
      Mercury0.250%

      Average monthly Kelso temperature with heat index

      Kelso monthly precipitation with daily maximum

      Kelso monthly snow depth with daily maximum

      Kelso monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Prescott, OR851864.0%
      Longview, WA37,9141864.0%
      Rainier, OR2,0801864.0%
      Longview Heights, WA4,3881864.0%
      Woodland, WA6,2231864.0%
      Kelso, WA12,2371864.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Palmer Town, MA12,2364020.0%
      Northlake, IL12,2355510.0%
      Orange City, FL12,2323726.0%
      Carnot-Moon, PA12,2425612.0%
      Mays Chapel, MD12,229468.0%
      Kelso, WA12,2371864.0%
      Source: The Kelso, WA 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.