| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 49°F | 37°F | 6.5" |
| February | 31°F | 52°F | 40°F | 4.6" |
| March | 42°F | 63°F | 51°F | 7.3" |
| April | 49°F | 71°F | 59°F | 8.6" |
| May | 57°F | 77°F | 66°F | 11.2" |
| June | 67°F | 87°F | 76°F | 9.6" |
| July | 69°F | 91°F | 79°F | 10.8" |
| August | 69°F | 90°F | 78°F | 9.2" |
| September | 61°F | 82°F | 71°F | 10.4" |
| October | 49°F | 72°F | 59°F | 8.0" |
| November | 41°F | 61°F | 50°F | 6.4" |
| December | 31°F | 50°F | 39°F | 7.6" |
| Index | West Siloam Springs | Oklahoma | National |
| Air quality index | 44 | 55 | 42 |
| Pollution index | 182,136 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 267 |
| Days with moderate air quality | 98 |
| 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 | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cloud Creek, OK | 381 | 36 | 28.0% |
| Flint Creek, OK | 735 | 36 | 28.0% |
| Proctor, OK | 378 | 36 | 28.0% |
| Colcord, OK | 870 | 36 | 28.0% |
| Kansas, OK | 1,112 | 36 | 28.0% |
| West Siloam Springs, OK | 1,282 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Woodstock, AL | 1,282 | 35 | 30.0% |
| Golden Shores, AZ | 1,282 | 13 | 74.0% |
| Cayuga, IN | 1,282 | 45 | 10.0% |
| Lonaconing, MD | 1,282 | 36 | 28.0% |
| Yellville, AR | 1,281 | 36 | 28.0% |
| West Siloam Springs, OK | 1,282 | 44 | 12.0% |
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