TODAY JUN18
TEMPERATURE61
HUMIDITY58
PRESSURE
WIND COND.
  • 8360Tue20%20%
  • 8456Wed20%
  • 7354Thu20%
  • 6951Fri
  • 7253Sat
daynightWeather update from Stevens Pass at

Index Average Weather

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
January19°F63°F40°F3.3"
February22°F61°F41°F1.6"
March21°F68°F44°F2.9"
April30°F77°F48°F2.7"
May39°F88°F54°F2.0"
June43°F84°F58°F1.6"
July48°F100°F63°F0.6"
August48°F86°F62°F0.9"
September44°F88°F58°F1.5"
October28°F77°F51°F3.2"
November16°F64°F45°F5.8"
December10°F58°F39°F5.3"

Did you know?

  • The highest monthly average temperature in Index for July is 63 degrees.
  • The lowest monthly average temperature in Index for December is 39 degrees.
  • The most monthly precipitation in Index occurs in November with 5.8 inches.
  • The air quality index in Index is 1% better than the national average.
  • The pollution index in Index is 755% worse than the national average.

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Compare Index, WA Weather To Other Cities

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 index493650
Pollution index43,367,4008,596,9895,066,862

Index air quality information

MeasurementTotal
Days measured365
Days with good air quality195
Days with moderate air quality162
Days w/ poor A.Q. for sensitive groups8
Days with unhealthy air quality

Index air quality information

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

City, StatePopulationAir Quality IndexNational Avg.
Gold Bar, WA2,026492%
Startup, WA621492%
May Creek, WA655492%
Sultan, WA4,887492%
North Sultan, WA244492%
Index, WA174492%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Albin, WY1742060%
Sheyenne, ND1743432%
Wright, MN1743726%
Calpine, CA1744412%
Rutledge, MN1743726%
Index, WA174492%
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.