| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 49°F | 32°F | 0.3" |
| February | 20°F | 52°F | 35°F | 0.3" |
| March | 29°F | 64°F | 45°F | 0.7" |
| April | 36°F | 71°F | 52°F | 1.2" |
| May | 45°F | 78°F | 61°F | 1.5" |
| June | 57°F | 91°F | 73°F | 1.2" |
| July | 62°F | 94°F | 77°F | 2.9" |
| August | 60°F | 90°F | 74°F | 2.5" |
| September | 52°F | 84°F | 67°F | 1.7" |
| October | 39°F | 73°F | 54°F | 0.9" |
| November | 28°F | 61°F | 43°F | 0.3" |
| December | 19°F | 48°F | 31°F | 0.5" |
| Index | Walsh | Colorado | National |
| Air quality index | 15 | 38 | 42 |
| Pollution index | 412,664 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 304 |
| Days with good air quality | 301 |
| Days with moderate air quality | 3 |
| 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 | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Two Buttes, CO | 41 | 20 | 60.0% |
| Vilas, CO | 109 | 20 | 60.0% |
| Walsh, CO | 491 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Wheatfields, AZ | 491 | 60 | 20.0% |
| Roopville, GA | 491 | 52 | 4.0% |
| Delmar, IA | 491 | 42 | 16.0% |
| Caspian, MI | 491 | 8 | 84.0% |
| Shuqualak, MS | 491 | 36 | 28.0% |
| Walsh, CO | 491 | 15 | 70.0% |
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