| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 49°F | 37°F | 2.8" |
| February | 30°F | 52°F | 40°F | 2.3" |
| March | 40°F | 64°F | 51°F | 6.7" |
| April | 49°F | 73°F | 60°F | 8.4" |
| May | 58°F | 78°F | 67°F | 7.4" |
| June | 67°F | 88°F | 77°F | 4.5" |
| July | 69°F | 90°F | 78°F | 5.0" |
| August | 69°F | 90°F | 78°F | 3.4" |
| September | 61°F | 83°F | 71°F | 4.4" |
| October | 49°F | 72°F | 59°F | 5.3" |
| November | 39°F | 62°F | 49°F | 3.6" |
| December | 32°F | 50°F | 40°F | 3.5" |
| Index | Gilbert | Arkansas | National |
| Air quality index | 36 | 38 | 42 |
| Pollution index | 993,329 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 347 |
| Days with moderate air quality | 18 |
| 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. |
| St. Joe, AR | 296 | 36 | 28.0% |
| Everton, AR | 52 | 36 | 28.0% |
| Western Grove, AR | 666 | 36 | 28.0% |
| Marshall, AR | 1,327 | 36 | 28.0% |
| Leslie, AR | 549 | 36 | 28.0% |
| Gilbert, AR | 3 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Portage Creek, AK | 3 | 31 | 38.0% |
| Poso Park, CA | 3 | 67 | 34.0% |
| Bonanza, CO | 3 | 16 | 68.0% |
| Brandon, CO | 3 | 20 | 60.0% |
| The Ranch, MN | 3 | 33 | 34.0% |
| Gilbert, AR | 3 | 36 | 28.0% |
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