| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 53°F | 44°F | 13.8" |
| February | 38°F | 58°F | 47°F | 3.2" |
| March | 47°F | 69°F | 57°F | 7.0" |
| April | 50°F | 73°F | 61°F | 6.6" |
| May | 61°F | 82°F | 71°F | 6.4" |
| June | 69°F | 90°F | 79°F | 5.6" |
| July | 72°F | 91°F | 80°F | 9.9" |
| August | 74°F | 97°F | 85°F | 2.2" |
| September | 67°F | 88°F | 77°F | 11.5" |
| October | 54°F | 76°F | 64°F | 6.7" |
| November | 45°F | 66°F | 55°F | 8.4" |
| December | 35°F | 57°F | 44°F | 7.6" |
| Index | Lonsdale | Arkansas | National |
| Air quality index | 38 | 38 | 42 |
| Pollution index | 1,270,470 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 121 |
| Days with good air quality | 93 |
| Days with moderate air quality | 28 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Fountain Lake, AR | 538 | 38 | 24.0% |
| Malvern, AR | 10,886 | 38 | 24.0% |
| Traskwood, AR | 350 | 38 | 24.0% |
| Perla, AR | 204 | 38 | 24.0% |
| Hot Springs, AR | 38,697 | 38 | 24.0% |
| Lonsdale, AR | 265 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Letona, AR | 265 | 45 | 10.0% |
| Trinity Center, CA | 265 | 42 | 16.0% |
| Garden Prairie, IL | 265 | 42 | 16.0% |
| Arjay, KY | 265 | 39 | 22.0% |
| Freeburn, KY | 265 | 295 | 490.0% |
| Lonsdale, AR | 265 | 38 | 24.0% |
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