| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 40°F | 30°F | 5.5" |
| February | 26°F | 49°F | 36°F | 1.4" |
| March | 33°F | 61°F | 46°F | 0.7" |
| April | 39°F | 66°F | 51°F | 1.0" |
| May | 47°F | 76°F | 60°F | 4.5" |
| June | 51°F | 83°F | 66°F | 5.0" |
| July | 59°F | 96°F | 78°F | 0.8" |
| August | 54°F | 93°F | 73°F | 1.1" |
| September | 45°F | 79°F | 61°F | 4.0" |
| October | 39°F | 66°F | 50°F | 5.4" |
| November | 29°F | 48°F | 37°F | 1.3" |
| December | 24°F | 38°F | 30°F | 6.7" |
| Index | Nampa | Idaho | National |
| Air quality index | 36 | 32 | 42 |
| Pollution index | 9,401,360 | 2,063,710 | 2,726,193 |
| 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 | 0.060% |
| Benzene | 0.130% |
| Carbon Tetrachloride | 0.090% |
| Lead | 0.070% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Kuna, ID | 20,985 | 36 | 28.0% |
| Middleton, ID | 8,005 | 36 | 28.0% |
| Marsing, ID | 1,379 | 36 | 28.0% |
| Notus, ID | 594 | 36 | 28.0% |
| Melba, ID | 658 | 36 | 28.0% |
| Nampa, ID | 96,825 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Federal Way, WA | 96,812 | 45 | 10.0% |
| Albany, NY | 96,860 | 37 | 26.0% |
| Bend, OR | 97,032 | 20 | 60.0% |
| Erie, PA | 96,616 | 36 | 28.0% |
| Lawrence, KS | 97,348 | 41 | 18.0% |
| Nampa, ID | 96,825 | 36 | 28.0% |
Here are the best places to live in Idaho
Check out the 10 safest cities in Idaho
Most Dangerous States In The US
Check out the 10 most dangerous cities in Idaho