| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 53°F | 39°F | 4.2" |
| February | 32°F | 56°F | 42°F | 3.7" |
| March | 43°F | 67°F | 53°F | 6.3" |
| April | 51°F | 75°F | 61°F | 9.1" |
| May | 59°F | 80°F | 69°F | 9.8" |
| June | 69°F | 89°F | 79°F | 11.6" |
| July | 72°F | 94°F | 82°F | 12.0" |
| August | 71°F | 93°F | 81°F | 8.3" |
| September | 64°F | 86°F | 73°F | 5.3" |
| October | 52°F | 75°F | 62°F | 7.5" |
| November | 42°F | 64°F | 52°F | 4.4" |
| December | 31°F | 52°F | 40°F | 4.6" |
| Index | Valley Brook | Oklahoma | National |
| Air quality index | 48 | 55 | 42 |
| Pollution index | 715,482 | 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 | 0.100% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.030% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Newcastle, OK | 10,425 | 48 | 4.0% |
| Nichols Hills, OK | 3,910 | 48 | 4.0% |
| Choctaw, OK | 12,467 | 48 | 4.0% |
| Mustang, OK | 22,228 | 48 | 4.0% |
| Spencer, OK | 3,985 | 48 | 4.0% |
| Valley Brook, OK | 904 | 48 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Valley Head, AL | 904 | 39 | 22.0% |
| Gibson, GA | 904 | 47 | 6.0% |
| Meredosia, IL | 904 | 41 | 18.0% |
| Martin Lake, MN | 904 | 46 | 8.0% |
| Emerson, NE | 904 | 35 | 30.0% |
| Valley Brook, OK | 904 | 48 | 4.0% |
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