| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 44°F | 28°F | 0.2" |
| February | 19°F | 46°F | 31°F | 0.4" |
| March | 28°F | 60°F | 42°F | 0.7" |
| April | 36°F | 66°F | 49°F | 2.8" |
| May | 46°F | 75°F | 59°F | 3.7" |
| June | 57°F | 88°F | 71°F | 3.4" |
| July | 62°F | 94°F | 77°F | 2.2" |
| August | 60°F | 90°F | 74°F | 2.4" |
| September | 51°F | 84°F | 65°F | 1.4" |
| October | 38°F | 69°F | 51°F | 1.4" |
| November | 26°F | 56°F | 39°F | 0.3" |
| December | 15°F | 42°F | 27°F | 0.4" |
| Index | Holyoke | Colorado | National |
| Air quality index | 19 | 38 | 42 |
| Pollution index | 121,329 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 113 |
| Days with good air quality | 110 |
| 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 | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Amherst, CO | 154 | 19 | 62.0% |
| Venango, NE | 162 | 19 | 62.0% |
| Paoli, CO | 73 | 19 | 62.0% |
| Holyoke, CO | 2,596 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Pocasset, MA | 2,596 | 36 | 28.0% |
| Barnum Island, NY | 2,596 | 51 | 2.0% |
| Seville, OH | 2,596 | 43 | 14.0% |
| Red Hill, PA | 2,596 | 42 | 16.0% |
| Geneva, WA | 2,596 | 34 | 32.0% |
| Holyoke, CO | 2,596 | 19 | 62.0% |
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