| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 54°F | 43°F | 3.8" |
| February | 37°F | 57°F | 46°F | 3.7" |
| March | 45°F | 67°F | 55°F | 5.1" |
| April | 53°F | 76°F | 64°F | 5.7" |
| May | 61°F | 82°F | 71°F | 5.6" |
| June | 70°F | 90°F | 80°F | 2.7" |
| July | 72°F | 92°F | 81°F | 3.3" |
| August | 71°F | 92°F | 81°F | 4.0" |
| September | 64°F | 87°F | 74°F | 3.7" |
| October | 52°F | 77°F | 63°F | 4.3" |
| November | 43°F | 65°F | 53°F | 3.7" |
| December | 37°F | 56°F | 45°F | 5.9" |
| Index | Sulphur Springs city | Arkansas | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 308,818 | 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 | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Staves, AR | 115 | 32 | 36.0% |
| Rison, AR | 1,139 | 32 | 36.0% |
| Sherrill, AR | 285 | 45 | 10.0% |
| Sulphur Springs, AR | 1,320 | 45 | 10.0% |
| White Hall, AR | 5,017 | 45 | 10.0% |
| Sulphur Springs city, AR | 397 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Chloride, AZ | 397 | 13 | 74.0% |
| Wellton Hills, AZ | 397 | 45 | 10.0% |
| Melvin, IL | 397 | 42 | 16.0% |
| Fairhaven, MN | 397 | 32 | 36.0% |
| Arapahoe, NC | 397 | 37 | 26.0% |
| Sulphur Springs city, AR | 397 | 45 | 10.0% |
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