| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 54°F | 41°F | 2.2" |
| February | 35°F | 57°F | 45°F | 2.0" |
| March | 45°F | 68°F | 55°F | 3.6" |
| April | 52°F | 76°F | 63°F | 5.6" |
| May | 60°F | 81°F | 69°F | 7.1" |
| June | 70°F | 90°F | 79°F | 4.7" |
| July | 72°F | 94°F | 82°F | 4.6" |
| August | 72°F | 94°F | 82°F | 3.6" |
| September | 64°F | 88°F | 74°F | 3.1" |
| October | 52°F | 77°F | 63°F | 4.1" |
| November | 43°F | 66°F | 53°F | 2.7" |
| December | 33°F | 55°F | 43°F | 2.8" |
| Index | Hartshorne | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 1,454,170 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 272 |
| Days with moderate air quality | 91 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Alderson, OK | 174 | 43 | 14.0% |
| McAlester, OK | 18,042 | 43 | 14.0% |
| Blanco, OK | 68 | 43 | 14.0% |
| Gowen, OK | 393 | 43 | 14.0% |
| Haileyville, OK | 670 | 43 | 14.0% |
| Hartshorne, OK | 1,805 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Stewartville, AL | 1,805 | 38 | 24.0% |
| Hamilton, GA | 1,805 | 42 | 16.0% |
| Freeport, PA | 1,805 | 56 | 12.0% |
| Poth, TX | 1,805 | 49 | 2.0% |
| Saint-Clet, QC | 1,805 | n/a | |
| Hartshorne, OK | 1,805 | 43 | 14.0% |
Here are the best places to live in Oklahoma
10 Best cities in Oklahoma for employment
These are the 10 most affordable cities in Oklahoma
Top 10 best public schools in Hartshorne