| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 51°F | 38°F | 3.0" |
| February | 32°F | 55°F | 42°F | 3.4" |
| March | 41°F | 65°F | 52°F | 6.1" |
| April | 50°F | 75°F | 62°F | 6.1" |
| May | 58°F | 82°F | 69°F | 8.3" |
| June | 68°F | 91°F | 79°F | 6.7" |
| July | 70°F | 93°F | 81°F | 4.2" |
| August | 69°F | 92°F | 79°F | 4.6" |
| September | 62°F | 86°F | 73°F | 5.1" |
| October | 49°F | 76°F | 61°F | 4.2" |
| November | 39°F | 64°F | 50°F | 4.5" |
| December | 32°F | 53°F | 42°F | 7.1" |
| Index | Letona | Arkansas | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 2,031,030 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 235 |
| Days with moderate air quality | 130 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Rose Bud, AR | 507 | 45 | 10.0% |
| Higginson, AR | 812 | 45 | 10.0% |
| Pleasant Plains, AR | 199 | 45 | 10.0% |
| Heber Springs, AR | 7,156 | 45 | 10.0% |
| Judsonia, AR | 2,360 | 45 | 10.0% |
| Letona, AR | 265 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Lonsdale, AR | 265 | 38 | 24.0% |
| 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% |
| Letona, AR | 265 | 45 | 10.0% |
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