| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 58°F | 44°F | 0.6" |
| February | 35°F | 63°F | 48°F | 0.6" |
| March | 40°F | 70°F | 55°F | 0.5" |
| April | 45°F | 77°F | 61°F | 0.3" |
| May | 54°F | 86°F | 71°F | 0.2" |
| June | 64°F | 97°F | 82°F | 0.1" |
| July | 71°F | 103°F | 88°F | 0.4" |
| August | 68°F | 100°F | 85°F | 0.4" |
| September | 61°F | 93°F | 77°F | 0.4" |
| October | 49°F | 80°F | 64°F | 0.5" |
| November | 38°F | 68°F | 53°F | 0.3" |
| December | 31°F | 57°F | 43°F | 0.9" |
| Index | Shoshone | California | National |
| Air quality index | 15 | 55 | 42 |
| Pollution index | 1,066,580 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 352 |
| Days with moderate air quality | 12 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.040% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Tecopa, CA | 212 | 15 | 70.0% |
| Shoshone, CA | 18 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Rockville, AL | 18 | 42 | 16.0% |
| Conejos, CO | 18 | 15 | 70.0% |
| Piedra, CO | 18 | 44 | 12.0% |
| Elkport, IA | 18 | 29 | 42.0% |
| Bentley, IL | 18 | 29 | 42.0% |
| Shoshone, CA | 18 | 15 | 70.0% |
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