| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 49°F | 35°F | 0.9" |
| February | 28°F | 52°F | 38°F | 1.3" |
| March | 40°F | 64°F | 51°F | 3.7" |
| April | 49°F | 72°F | 59°F | 4.6" |
| May | 57°F | 79°F | 67°F | 7.0" |
| June | 68°F | 89°F | 78°F | 5.4" |
| July | 71°F | 94°F | 82°F | 3.6" |
| August | 69°F | 93°F | 80°F | 4.6" |
| September | 61°F | 84°F | 71°F | 4.6" |
| October | 49°F | 74°F | 60°F | 3.4" |
| November | 39°F | 62°F | 49°F | 2.3" |
| December | 28°F | 49°F | 38°F | 1.7" |
| Index | Welch | Oklahoma | National |
| Air quality index | 38 | 55 | 42 |
| Pollution index | 947,958 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 289 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Afton, OK | 906 | 38 | 24.0% |
| Miami, OK | 13,176 | 38 | 24.0% |
| Edna, KS | 362 | 38 | 24.0% |
| Bluejacket, OK | 237 | 38 | 24.0% |
| Copeland, OK | 1,725 | 38 | 24.0% |
| Welch, OK | 663 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Central City, AR | 663 | 36 | 28.0% |
| Kiowa, CO | 663 | 58 | 16.0% |
| North Washington, CO | 663 | 58 | 16.0% |
| Roeville, FL | 663 | 41 | 18.0% |
| Kennard, IN | 663 | 28 | 44.0% |
| Welch, OK | 663 | 38 | 24.0% |
Here are the best places to live in Oklahoma
Check out the 10 safest cities in Oklahoma
These are the 10 cheapest cities in Oklahoma
Most Dangerous States In The US