TODAY JUL19
TEMPERATURE73
HUMIDITY28
PRESSURE
WIND COND.130 5.8
  • 9462Fri
  • 9461Sat
  • 9461Sun
  • 9561Mon
  • 9662Tue
daynightWeather update from Boise Air Terminal at

Northwest 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
January5°F55°F31°F0.7"
February10°F61°F36°F0.6"
March20°F75°F43°F1.1"
April26°F86°F50°F1.1"
May30°F95°F61°F1.4"
June39°F105°F68°F1.3"
July52°F107°F80°F0.1"
August43°F105°F76°F0.4"
September35°F101°F66°F0.4"
October18°F91°F51°F0.8"
November12°F73°F41°F1.2"
December-4°F61°F30°F1.9"

Did you know?

  • The highest monthly average temperature in Northwest for July is 80 degrees.
  • The lowest monthly average temperature in Northwest for December is 30 degrees.
  • The most monthly precipitation in Northwest occurs in December with 1.9 inches.
  • The air quality index in Northwest is 27% better than the national average.
  • The pollution index in Northwest is 82% better than the national average.

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Compare Boise, ID Weather To Other Cities

Northwest 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.
IndexNorthwestBoiseIdaho
Air quality index363632
Pollution index886,004886,0042,232,285

Northwest air quality information

MeasurementTotal
Days measured365
Days with good air quality293
Days with moderate air quality60
Days w/ poor A.Q. for sensitive groups9
Days with unhealthy air quality3

Northwest air quality information

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

Average monthly Northwest temperature with heat index

Northwest monthly precipitation with daily maximum

Northwest monthly snow depth with daily maximum

Northwest monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Hidden Springs, ID2,4743628%
Robie Creek, ID1,5703628%
Eagle, ID22,7113628%
Kuna, ID17,0153628%
Star, ID7,2553628%
Boise, ID218,6773628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Richmond, VA216,7733922%
San Bernardino, CA214,5818570%
Des Moines, IA212,8594118%
Birmingham, AL212,42450= 100
Spokane, WA212,0783922%
Boise, ID218,6773628%
Source: The Northwest, Boise, ID 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.