| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 48°F | 38°F | 6.7" |
| February | 32°F | 50°F | 40°F | 7.1" |
| March | 42°F | 62°F | 51°F | 9.1" |
| April | 52°F | 73°F | 61°F | 14.5" |
| May | 60°F | 80°F | 69°F | 10.7" |
| June | 69°F | 89°F | 79°F | 9.2" |
| July | 72°F | 90°F | 80°F | 8.0" |
| August | 69°F | 89°F | 78°F | 8.6" |
| September | 62°F | 83°F | 71°F | 8.7" |
| October | 51°F | 73°F | 60°F | 8.5" |
| November | 40°F | 60°F | 49°F | 6.8" |
| December | 34°F | 49°F | 41°F | 9.2" |
| Index | Success | Arkansas | National |
| Air quality index | 26 | 38 | 42 |
| Pollution index | 346,319 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 360 |
| Days with good air quality | 341 |
| Days with moderate air quality | 19 |
| 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 | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Datto, AR | 69 | 26 | 48.0% |
| Doniphan, MO | 2,467 | 26 | 48.0% |
| Neelyville, MO | 285 | 26 | 48.0% |
| Maynard, AR | 440 | 26 | 48.0% |
| Fairdealing, MO | 459 | 26 | 48.0% |
| Success, AR | 111 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Myrtlewood, AL | 111 | 36 | 28.0% |
| Gum Springs, AR | 111 | 32 | 36.0% |
| Gazelle, CA | 111 | 36 | 28.0% |
| Orchard, CO | 111 | 45 | 10.0% |
| Sumatra, FL | 111 | 38 | 24.0% |
| Success, AR | 111 | 26 | 48.0% |
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