| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 51°F | 40°F | 3.8" |
| February | 34°F | 53°F | 43°F | 3.2" |
| March | 44°F | 64°F | 53°F | 5.1" |
| April | 52°F | 74°F | 63°F | 5.2" |
| May | 61°F | 81°F | 70°F | 6.9" |
| June | 69°F | 90°F | 79°F | 2.9" |
| July | 71°F | 91°F | 80°F | 3.3" |
| August | 70°F | 91°F | 80°F | 2.1" |
| September | 63°F | 86°F | 73°F | 2.6" |
| October | 51°F | 75°F | 62°F | 3.5" |
| November | 41°F | 63°F | 51°F | 3.7" |
| December | 36°F | 53°F | 44°F | 5.7" |
| Index | Horseshoe Lake | Arkansas | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 852,142 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 221 |
| Days with moderate air quality | 139 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.005% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Hughes, AR | 993 | 45 | 10.0% |
| Walls, MS | 1,415 | 45 | 10.0% |
| Lynchburg, MS | 2,216 | 45 | 10.0% |
| Horn Lake, MS | 27,234 | 45 | 10.0% |
| Anthonyville, AR | 68 | 45 | 10.0% |
| Horseshoe Lake, AR | 435 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Havana, AR | 435 | 36 | 28.0% |
| Manzanola, CO | 435 | 20 | 60.0% |
| Spring Grove, IN | 435 | 6 | 88.0% |
| Tolchester, MD | 435 | 46 | 8.0% |
| Fortine, MT | 435 | 37 | 26.0% |
| Horseshoe Lake, AR | 435 | 45 | 10.0% |
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