| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 56°F | 39°F | 6.1" |
| February | 31°F | 59°F | 43°F | 4.0" |
| March | 41°F | 70°F | 54°F | 7.4" |
| April | 49°F | 78°F | 62°F | 7.0" |
| May | 58°F | 85°F | 71°F | 8.5" |
| June | 69°F | 95°F | 81°F | 7.2" |
| July | 71°F | 97°F | 84°F | 8.4" |
| August | 70°F | 97°F | 83°F | 5.6" |
| September | 63°F | 89°F | 75°F | 7.4" |
| October | 51°F | 79°F | 63°F | 8.3" |
| November | 39°F | 66°F | 51°F | 7.3" |
| December | 29°F | 53°F | 40°F | 5.5" |
| Index | Friendship | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 311,261 | 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 | 0.004% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Elmer, OK | 92 | 43 | 14.0% |
| Altus, OK | 18,533 | 43 | 14.0% |
| Roosevelt, OK | 232 | 43 | 14.0% |
| Manitou, OK | 247 | 43 | 14.0% |
| Martha, OK | 130 | 43 | 14.0% |
| Friendship, OK | 36 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Excursion Inlet, AK | 36 | 20 | 60.0% |
| Proberta, CA | 36 | 41 | 18.0% |
| Maybell, CO | 36 | 49 | 2.0% |
| Coburg, IA | 36 | 40 | 20.0% |
| St. Vincent, MN | 36 | 33 | 34.0% |
| Friendship, OK | 36 | 43 | 14.0% |
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