| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 62°F | 48°F | 4.2" |
| February | 40°F | 65°F | 51°F | 3.4" |
| March | 47°F | 73°F | 60°F | 4.8" |
| April | 54°F | 80°F | 67°F | 4.4" |
| May | 62°F | 86°F | 74°F | 5.0" |
| June | 71°F | 93°F | 81°F | 3.7" |
| July | 73°F | 95°F | 83°F | 4.3" |
| August | 74°F | 97°F | 84°F | 3.0" |
| September | 67°F | 92°F | 79°F | 2.9" |
| October | 54°F | 82°F | 67°F | 4.9" |
| November | 45°F | 71°F | 57°F | 3.9" |
| December | 39°F | 62°F | 50°F | 4.4" |
| Index | Gloster | Louisiana | National |
| Air quality index | 39 | 106 | 42 |
| Pollution index | 9,704,260 | 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 | 0.290% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.070% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Mansfield, LA | 4,652 | 39 | 22.0% |
| Logansport, LA | 1,878 | 39 | 22.0% |
| South Mansfield, LA | 540 | 39 | 22.0% |
| Longstreet, LA | 157 | 39 | 22.0% |
| Grand Cane, LA | 264 | 39 | 22.0% |
| Gloster, LA | 41 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Tatitlek, AK | 41 | 31 | 38.0% |
| Tinsman, AR | 41 | 35 | 30.0% |
| Two Buttes, CO | 41 | 20 | 60.0% |
| Conway, IA | 41 | 43 | 14.0% |
| Irvington, IA | 41 | 15 | 70.0% |
| Gloster, LA | 41 | 39 | 22.0% |
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