| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 61°F | 49°F | 5.4" |
| February | 42°F | 64°F | 52°F | 4.6" |
| March | 50°F | 73°F | 60°F | 4.6" |
| April | 57°F | 79°F | 67°F | 5.9" |
| May | 63°F | 85°F | 73°F | 4.7" |
| June | 71°F | 92°F | 80°F | 4.0" |
| July | 73°F | 93°F | 81°F | 4.4" |
| August | 73°F | 94°F | 82°F | 3.5" |
| September | 67°F | 89°F | 76°F | 3.0" |
| October | 55°F | 81°F | 67°F | 5.7" |
| November | 47°F | 71°F | 57°F | 4.5" |
| December | 43°F | 63°F | 51°F | 5.4" |
| Index | Zwolle | Louisiana | National |
| Air quality index | 39 | 106 | 42 |
| Pollution index | 1,390,820 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Many, LA | 2,703 | 30 | 40.0% |
| Fisher, LA | 198 | 30 | 40.0% |
| Florien, LA | 646 | 30 | 40.0% |
| Fort Jesup, LA | 648 | 30 | 40.0% |
| Pleasant Hill, LA | 580 | 39 | 22.0% |
| Zwolle, LA | 2,312 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Collinsville, AL | 2,312 | 39 | 22.0% |
| Chiefland, FL | 2,312 | 35 | 30.0% |
| Arroyo Seco, NM | 2,311 | 15 | 70.0% |
| Boles Acres, NM | 2,311 | 10 | 80.0% |
| Mayer, MN | 2,313 | 46 | 8.0% |
| Zwolle, LA | 2,312 | 39 | 22.0% |
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