| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 3°F | 20°F | 11°F | 5.3" |
| February | 4°F | 22°F | 12°F | 1.7" |
| March | 21°F | 38°F | 28°F | 2.5" |
| April | 34°F | 54°F | 43°F | 3.2" |
| May | 46°F | 69°F | 56°F | 4.5" |
| June | 56°F | 77°F | 66°F | 7.4" |
| July | 60°F | 83°F | 71°F | 6.3" |
| August | 57°F | 79°F | 67°F | 2.9" |
| September | 49°F | 72°F | 60°F | 3.7" |
| October | 38°F | 57°F | 46°F | 7.1" |
| November | 24°F | 41°F | 32°F | 0.9" |
| December | 7°F | 23°F | 15°F | 0.7" |
| Index | Colfax | North Dakota | National |
| Air quality index | 33 | 35 | 42 |
| Pollution index | 765,054 | 1,038,665 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 327 |
| Days with moderate air quality | 34 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Breckenridge, MN | 3,198 | 33 | 34.0% |
| Christine, ND | 161 | 33 | 34.0% |
| Oxbow, ND | 249 | 33 | 34.0% |
| Comstock, MN | 72 | 33 | 34.0% |
| Kent, MN | 40 | 33 | 34.0% |
| Colfax, ND | 266 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Mentasta Lake, AK | 266 | 38 | 24.0% |
| Cassel, CA | 266 | 42 | 16.0% |
| Hiouchi, CA | 266 | 20 | 60.0% |
| Pineland, FL | 266 | 36 | 28.0% |
| Secor, IL | 266 | 44 | 12.0% |
| Colfax, ND | 266 | 33 | 34.0% |
Here are the best places to live in North Dakota
See the best places to live in Colfax
These are the largest cities in North Dakota
Most Dangerous Cities In The US