| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 52°F | 41°F | 8.9" |
| February | 34°F | 56°F | 44°F | 3.8" |
| March | 43°F | 68°F | 54°F | 5.7" |
| April | 47°F | 72°F | 58°F | 4.8" |
| May | 58°F | 81°F | 69°F | 3.2" |
| June | 67°F | 89°F | 77°F | 6.8" |
| July | 69°F | 92°F | 79°F | 4.8" |
| August | 72°F | 98°F | 83°F | 7.9" |
| September | 65°F | 88°F | 75°F | 12.1" |
| October | 52°F | 76°F | 62°F | 4.4" |
| November | 40°F | 65°F | 52°F | 3.2" |
| December | 30°F | 52°F | 40°F | 10.6" |
| Index | Havana | Arkansas | National |
| Air quality index | 36 | 38 | 42 |
| Pollution index | 506,308 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 323 |
| Days with moderate air quality | 38 |
| 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 | 0.000% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Blue Mountain, AR | 123 | 36 | 28.0% |
| New Blaine, AR | 72 | 36 | 28.0% |
| Paris, AR | 3,403 | 36 | 28.0% |
| Subiaco, AR | 488 | 36 | 28.0% |
| Belleville, AR | 852 | 38 | 24.0% |
| Havana, AR | 435 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Horseshoe Lake, AR | 435 | 45 | 10.0% |
| 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% |
| Havana, AR | 435 | 36 | 28.0% |
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