| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 54°F | 41°F | 4.3" |
| February | 34°F | 57°F | 44°F | 4.4" |
| March | 43°F | 67°F | 54°F | 5.8" |
| April | 51°F | 75°F | 62°F | 7.4" |
| May | 59°F | 80°F | 69°F | 8.4" |
| June | 67°F | 89°F | 77°F | 5.2" |
| July | 70°F | 92°F | 80°F | 4.7" |
| August | 69°F | 92°F | 79°F | 5.6" |
| September | 61°F | 86°F | 72°F | 4.3" |
| October | 50°F | 76°F | 61°F | 5.2" |
| November | 41°F | 64°F | 52°F | 5.7" |
| December | 34°F | 55°F | 43°F | 5.4" |
| Index | Kirby | Arkansas | National |
| Air quality index | 32 | 38 | 42 |
| Pollution index | 6,037,890 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 355 |
| Days with good air quality | 347 |
| Days with moderate air quality | 8 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 3.210% |
| Lead | 0.160% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Amity, AR | 753 | 32 | 36.0% |
| Daisy, AR | 79 | 32 | 36.0% |
| Murfreesboro, AR | 1,905 | 32 | 36.0% |
| Glenwood, AR | 1,979 | 38 | 24.0% |
| Black Springs, AR | 99 | 38 | 24.0% |
| Kirby, AR | 710 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Ty Ty, GA | 710 | 40 | 20.0% |
| Stewardson, IL | 710 | 40 | 20.0% |
| Bardwell, KY | 710 | 44 | 12.0% |
| Washington Grove, MD | 710 | 47 | 6.0% |
| Robin Glen-Indiantown, MI | 710 | 26 | 48.0% |
| Kirby, AR | 710 | 32 | 36.0% |
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