| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 56°F | 40°F | 0.7" |
| February | 32°F | 60°F | 44°F | 1.0" |
| March | 42°F | 71°F | 55°F | 1.4" |
| April | 50°F | 78°F | 63°F | 3.0" |
| May | 59°F | 85°F | 71°F | 4.7" |
| June | 69°F | 94°F | 81°F | 2.8" |
| July | 72°F | 98°F | 85°F | 2.9" |
| August | 72°F | 98°F | 84°F | 3.2" |
| September | 64°F | 90°F | 76°F | 2.8" |
| October | 51°F | 79°F | 64°F | 2.2" |
| November | 40°F | 67°F | 52°F | 1.2" |
| December | 30°F | 55°F | 41°F | 1.1" |
| Index | Geronimo | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 294,890 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 285 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Faxon, OK | 63 | 43 | 14.0% |
| Temple, OK | 916 | 43 | 14.0% |
| Walters, OK | 2,701 | 43 | 14.0% |
| Cache, OK | 2,843 | 43 | 14.0% |
| Lawton, OK | 93,535 | 43 | 14.0% |
| Geronimo, OK | 1,191 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Skagway, AK | 1,191 | 20 | 60.0% |
| Felton, DE | 1,191 | 42 | 16.0% |
| Haven, KS | 1,191 | 40 | 20.0% |
| Goodhue, MN | 1,191 | 37 | 26.0% |
| L'Anse-Saint-Jean, QC | 1,191 | n/a | |
| Geronimo, OK | 1,191 | 43 | 14.0% |
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