| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 51°F | 38°F | 3.2" |
| February | 30°F | 54°F | 40°F | 4.3" |
| March | 41°F | 66°F | 51°F | 4.2" |
| April | 48°F | 73°F | 59°F | 6.2" |
| May | 57°F | 80°F | 68°F | 6.8" |
| June | 69°F | 91°F | 79°F | 8.7" |
| July | 71°F | 94°F | 82°F | 9.5" |
| August | 70°F | 92°F | 81°F | 6.5" |
| September | 62°F | 85°F | 73°F | 6.6" |
| October | 51°F | 75°F | 62°F | 5.4" |
| November | 39°F | 62°F | 49°F | 11.2" |
| December | 29°F | 50°F | 38°F | 3.9" |
| Index | Chester | Oklahoma | National |
| Air quality index | 48 | 55 | 42 |
| Pollution index | 203,742 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 204 |
| Days with moderate air quality | 159 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Taloga, OK | 327 | 48 | 4.0% |
| Mutual, OK | 36 | 48 | 4.0% |
| Seiling, OK | 1,070 | 48 | 4.0% |
| Chester, OK | 98 | 48 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Nelson Lagoon, AK | 98 | 31 | 38.0% |
| Northway Village, AK | 98 | 38 | 24.0% |
| Cusseta, AL | 98 | 42 | 16.0% |
| Peach Orchard, AR | 98 | 26 | 48.0% |
| Cowlic, AZ | 98 | 31 | 38.0% |
| Chester, OK | 98 | 48 | 4.0% |
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
These are the largest cities in Oklahoma