| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 39°F | 30°F | 1.3" |
| February | 28°F | 48°F | 37°F | 0.9" |
| March | 34°F | 58°F | 45°F | 1.5" |
| April | 37°F | 65°F | 51°F | 1.2" |
| May | 45°F | 75°F | 60°F | 1.2" |
| June | 53°F | 85°F | 69°F | 0.8" |
| July | 62°F | 97°F | 79°F | 0.2" |
| August | 60°F | 93°F | 77°F | 0.3" |
| September | 52°F | 83°F | 67°F | 0.5" |
| October | 41°F | 68°F | 53°F | 1.0" |
| November | 32°F | 52°F | 41°F | 1.3" |
| December | 23°F | 39°F | 31°F | 1.9" |
| Index | Boise Heights | Boise | Idaho |
| Air quality index | 36 | 36 | 32 |
| Pollution index | 886,004 | 886,004 | 2,063,710 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 293 |
| Days with moderate air quality | 60 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality | 3 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Meridian, ID | 107,787 | 36 | 28.0% |
| Eagle, ID | 28,145 | 36 | 28.0% |
| Robie Creek, ID | 1,380 | 36 | 28.0% |
| Garden City, ID | 11,873 | 36 | 28.0% |
| Kuna, ID | 20,985 | 36 | 28.0% |
| Boise, ID | 228,057 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Richmond, VA | 229,233 | 44 | 12.0% |
| Windsor, ON | 230,583 | n/a | |
| Richmond, BC | 222,489 | n/a | |
| Hialeah, FL | 233,876 | 41 | 18.0% |
| Baton Rouge, LA | 222,191 | 45 | 10.0% |
| Boise, ID | 228,057 | 36 | 28.0% |
Here are the best places to live in Idaho
Check out the 10 most dangerous cities in Idaho
See the best places to live in Boise
These are the largest cities in Idaho