| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 49°F | 37°F | 6.5" |
| February | 31°F | 52°F | 40°F | 4.6" |
| March | 42°F | 63°F | 51°F | 7.3" |
| April | 49°F | 71°F | 59°F | 8.6" |
| May | 57°F | 77°F | 66°F | 11.2" |
| June | 67°F | 87°F | 76°F | 9.6" |
| July | 69°F | 91°F | 79°F | 10.8" |
| August | 69°F | 90°F | 78°F | 9.2" |
| September | 61°F | 82°F | 71°F | 10.4" |
| October | 49°F | 72°F | 59°F | 8.0" |
| November | 41°F | 61°F | 50°F | 6.4" |
| December | 31°F | 50°F | 39°F | 7.6" |
| Index | Leach | Oklahoma | National |
| Air quality index | 36 | 55 | 42 |
| Pollution index | 1,549,330 | 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 | 0.230% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.070% |
| Mercury | 0.210% |
| City | Population | Air Quality Index | National Avg. |
| Cloud Creek, OK | 381 | 36 | 28.0% |
| Salina, OK | 1,484 | 36 | 28.0% |
| Locust Grove, OK | 1,540 | 36 | 28.0% |
| Gideon, OK | 352 | 36 | 28.0% |
| Oaks, OK | 265 | 36 | 28.0% |
| Leach, OK | 275 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Ambler, AK | 275 | 38 | 24.0% |
| Huslia, AK | 275 | 38 | 24.0% |
| Mount Olive CDP (Coosa County), AL | 275 | 53 | 6.0% |
| Oconee, GA | 275 | 38 | 24.0% |
| Kimballton, IA | 275 | 40 | 20.0% |
| Leach, OK | 275 | 36 | 28.0% |
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