TODAY NOV24
TEMPERATURE36
HUMIDITY100
PRESSURE
WIND COND.
  • 4338Sun70%80%
  • 4536Mon70%60%
  • 4236Tue60%70%
  • 4034Wed
  • 4031
daynightWeather update from JOHNSON RIDGE at
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Weather Quick Facts

  • The highest monthly average temperature in Index for August is 63.5 degrees
  • The lowest monthly average temperature in Index for December is 39.4 degrees
  • The most monthly precipitation in Index occurs in November with 5.7 inches
  • The air quality index in Index is 7% worse than the national average
  • The pollution index in Index is 1491% worse than the national average

Compare Index, WA Weather

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      Index 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°F41°F3.8"
      February37°F49°F42°F2.7"
      March39°F52°F45°F4.4"
      April42°F57°F48°F2.8"
      May47°F64°F54°F2.2"
      June51°F68°F58°F1.8"
      July55°F74°F63°F0.7"
      August56°F75°F63°F0.9"
      September53°F69°F59°F2.0"
      October47°F59°F52°F3.6"
      November40°F51°F45°F5.7"
      December35°F44°F39°F4.9"

      Index 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.
      IndexIndexWashingtonNational
      Air quality index453642
      Pollution index43,367,4004,541,8502,726,193

      Index air quality

      MeasurementTotal
      Days measured365
      Days with good air quality236
      Days with moderate air quality127
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.020%
      Benzene0.790%
      Carbon Tetrachloride0.120%
      Lead0.210%
      Mercury0.180%

      Average monthly Index temperature with heat index

      Index monthly precipitation with daily maximum

      Index monthly snow depth with daily maximum

      Index monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      May Creek, WA7594510.0%
      Baring, WA2054510.0%
      North Sultan, WA2654510.0%
      Skykomish, WA1274510.0%
      Startup, WA7714510.0%
      Index, WA1724510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Ethelsville, AL1723530.0%
      Spring Garden, AL1724314.0%
      Greenway, AR1722648.0%
      East Nicolaus, CA1724412.0%
      Honcut, CA1724412.0%
      Index, WA1724510.0%
      Source: The Index, 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.