| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 46°F | 31°F | 3.2" |
| February | 26°F | 52°F | 36°F | 1.3" |
| March | 35°F | 66°F | 48°F | 2.5" |
| April | 40°F | 69°F | 52°F | 4.8" |
| May | 52°F | 80°F | 64°F | 4.3" |
| June | 61°F | 88°F | 73°F | 11.4" |
| July | 65°F | 95°F | 79°F | 2.2" |
| August | 66°F | 95°F | 79°F | 11.3" |
| September | 60°F | 90°F | 72°F | 5.0" |
| October | 46°F | 79°F | 59°F | 9.8" |
| November | 30°F | 64°F | 44°F | 1.3" |
| December | 21°F | 49°F | 32°F | 3.3" |
| Index | Forgan | Oklahoma | National |
| Air quality index | 15 | 55 | 42 |
| Pollution index | 290,018 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 304 |
| Days with good air quality | 301 |
| Days with moderate air quality | 3 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Beaver, OK | 1,393 | 15 | 70.0% |
| Forgan, OK | 514 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Babbie, AL | 514 | 35 | 30.0% |
| Kingsland, AR | 514 | 32 | 36.0% |
| Turkey Creek, AZ | 514 | 44 | 12.0% |
| Burlington, IL | 514 | 42 | 16.0% |
| Cawker City, KS | 514 | 19 | 62.0% |
| Forgan, OK | 514 | 15 | 70.0% |
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