| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 39°F | 28°F | 2.2" |
| February | 23°F | 47°F | 36°F | 1.8" |
| March | 31°F | 58°F | 45°F | 3.2" |
| April | 35°F | 65°F | 51°F | 2.0" |
| May | 45°F | 75°F | 61°F | 3.1" |
| June | 56°F | 86°F | 74°F | 5.1" |
| July | 64°F | 96°F | 82°F | 1.3" |
| August | 62°F | 93°F | 79°F | 2.4" |
| September | 50°F | 82°F | 68°F | 3.9" |
| October | 36°F | 66°F | 52°F | 3.1" |
| November | 25°F | 53°F | 40°F | 1.9" |
| December | 16°F | 38°F | 28°F | 2.4" |
| Index | Richfield | Utah | National |
| Air quality index | 46 | 45 | 42 |
| Pollution index | 488,032 | 3,340,369 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 265 |
| Days with moderate air quality | 99 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.001% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Glenwood, UT | 664 | 46 | 8.0% |
| Fillmore, UT | 2,585 | 46 | 8.0% |
| Annabella, UT | 886 | 46 | 8.0% |
| Joseph, UT | 495 | 46 | 8.0% |
| Salina, UT | 2,603 | 46 | 8.0% |
| Richfield, UT | 7,813 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Arran-Elderslie, ON | 7,811 | n/a | |
| Quincy, WA | 7,815 | 24 | 52.0% |
| York, NE | 7,810 | 19 | 62.0% |
| Wilson, PA | 7,809 | 42 | 16.0% |
| Odessa, FL | 7,808 | 43 | 14.0% |
| Richfield, UT | 7,813 | 46 | 8.0% |
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