| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 5°F | 36°F | 20°F | 0.8" |
| February | 10°F | 39°F | 25°F | 0.6" |
| March | 17°F | 47°F | 32°F | 0.9" |
| April | 23°F | 56°F | 39°F | 0.7" |
| May | 30°F | 65°F | 48°F | 0.8" |
| June | 36°F | 78°F | 59°F | 0.4" |
| July | 47°F | 82°F | 64°F | 1.8" |
| August | 44°F | 79°F | 61°F | 1.7" |
| September | 36°F | 72°F | 54°F | 2.0" |
| October | 27°F | 60°F | 42°F | 1.7" |
| November | 16°F | 49°F | 31°F | 0.5" |
| December | 6°F | 37°F | 21°F | 0.9" |
| Index | Tropic | Utah | National |
| Air quality index | 44 | 45 | 42 |
| Pollution index | 7,643,910 | 3,340,369 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.090% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.050% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Cannonville, UT | 350 | 44 | 12.0% |
| Henrieville, UT | 249 | 44 | 12.0% |
| Bryce Canyon City, UT | 191 | 44 | 12.0% |
| Tropic, UT | 481 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Pleasant Groves, AL | 481 | 44 | 12.0% |
| Newell, CA | 481 | 29 | 42.0% |
| Manilla, IN | 481 | 28 | 44.0% |
| Kensington, KS | 481 | 19 | 62.0% |
| Scandia, KS | 481 | 32 | 36.0% |
| Tropic, UT | 481 | 44 | 12.0% |
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