TODAY JUL20
TEMPERATURE82
HUMIDITY45
PRESSURE102070
WIND COND.30 9.4
  • 9354Sat
  • 8453Sun
  • 7648Mon
  • 7947Tue
  • 7948Wed
daynightWeather update from Chehalis-Centralia Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Grand Mound for July is 64.3 degrees
  • The lowest monthly average temperature in Grand Mound for December is 38.2 degrees
  • The most monthly precipitation in Grand Mound occurs in November with 9.7 inches
  • The air quality index in Grand Mound is 52% better than the national average
  • The pollution index in Grand Mound is 154% worse than the national average

Compare Grand Mound, WA Weather

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      Grand Mound 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
      January32°F47°F39°F7.3"
      February32°F51°F41°F4.8"
      March35°F55°F44°F7.0"
      April36°F61°F48°F3.5"
      May42°F68°F55°F2.7"
      June47°F73°F59°F1.5"
      July50°F80°F64°F0.6"
      August50°F81°F64°F1.0"
      September46°F74°F59°F2.5"
      October41°F62°F51°F5.5"
      November35°F52°F44°F9.7"
      December31°F46°F38°F8.0"

      Grand Mound 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.
      IndexGrand MoundWashingtonNational
      Air quality index203642
      Pollution index6,915,9504,541,8502,726,193

      Grand Mound air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality343
      Days with moderate air quality22
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Grand Mound air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.110%
      Carbon Tetrachloride0.010%
      Lead0.000%
      Mercury0.001%

      Average monthly Grand Mound temperature with heat index

      Grand Mound monthly precipitation with daily maximum

      Grand Mound monthly snow depth with daily maximum

      Grand Mound monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Bucoda, WA6082060.0%
      Rochester, WA4,8542060.0%
      Centralia, WA17,4732060.0%
      Tenino, WA1,7442060.0%
      Oakville, WA6472060.0%
      Grand Mound, WA3,9572060.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Lake San Marcos, CA3,9576428.0%
      Southgate, KY3,957548.0%
      Level Green, PA3,9575612.0%
      Ashland, MO3,9563824.0%
      Weaverville, NC3,9564412.0%
      Grand Mound, WA3,9572060.0%
      Source: The Grand Mound, 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.