| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 21°F | 13°F | 1.0" |
| February | 7°F | 26°F | 16°F | 1.4" |
| March | 21°F | 42°F | 30°F | 1.7" |
| April | 31°F | 57°F | 42°F | 3.3" |
| May | 43°F | 69°F | 56°F | 4.0" |
| June | 53°F | 78°F | 65°F | 3.9" |
| July | 58°F | 83°F | 70°F | 5.3" |
| August | 53°F | 82°F | 67°F | 4.0" |
| September | 47°F | 73°F | 59°F | 3.9" |
| October | 35°F | 58°F | 45°F | 2.6" |
| November | 21°F | 42°F | 30°F | 0.9" |
| December | 7°F | 26°F | 16°F | 1.8" |
| Index | Harvey | North Dakota | National |
| Air quality index | 36 | 35 | 42 |
| Pollution index | 220,768 | 1,038,665 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 320 |
| Days with moderate air quality | 45 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Martin, ND | 48 | 36 | 28.0% |
| Anamoose, ND | 345 | 36 | 28.0% |
| Selz, ND | 51 | 36 | 28.0% |
| Fessenden, ND | 560 | 36 | 28.0% |
| Heimdal, ND | 22 | 36 | 28.0% |
| Harvey, ND | 1,625 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| East Palatka, FL | 1,625 | 17 | 66.0% |
| Cedar Hill, MO | 1,625 | 54 | 8.0% |
| Roaming Shores, OH | 1,625 | 34 | 32.0% |
| Montgomery, WV | 1,625 | 40 | 20.0% |
| Maliotenam, QC | 1,625 | n/a | |
| Harvey, ND | 1,625 | 36 | 28.0% |
Here are the best places to live in North Dakota
See the best places to live in Harvey
Safest Cities In The US
These are the largest cities in North Dakota