| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 50°F | 37°F | 3.1" |
| February | 29°F | 52°F | 40°F | 2.6" |
| March | 38°F | 63°F | 50°F | 5.5" |
| April | 47°F | 71°F | 58°F | 7.3" |
| May | 55°F | 77°F | 65°F | 7.4" |
| June | 64°F | 86°F | 75°F | 4.2" |
| July | 67°F | 90°F | 78°F | 5.1" |
| August | 66°F | 90°F | 77°F | 4.7" |
| September | 58°F | 82°F | 69°F | 5.0" |
| October | 46°F | 72°F | 58°F | 5.2" |
| November | 37°F | 62°F | 49°F | 3.5" |
| December | 29°F | 51°F | 39°F | 3.8" |
| Index | Salem | Oklahoma | National |
| Air quality index | 36 | 55 | 42 |
| Pollution index | 454,845 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 291 |
| Days with good air quality | 269 |
| Days with moderate air quality | 22 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lyons Switch, OK | 612 | 36 | 28.0% |
| Titanic, OK | 419 | 36 | 28.0% |
| Bell, OK | 390 | 36 | 28.0% |
| Nicut, OK | 312 | 36 | 28.0% |
| Eldon, OK | 151 | 36 | 28.0% |
| Salem, OK | 142 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Golovin, AK | 142 | 38 | 24.0% |
| Kaibab, AZ | 142 | 44 | 12.0% |
| Alpine Village, CA | 142 | 13 | 74.0% |
| Bluewater, CA | 142 | 13 | 74.0% |
| Comptche, CA | 142 | 33 | 34.0% |
| Salem, OK | 142 | 36 | 28.0% |
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