| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 57°F | 38°F | 1.9" |
| February | 25°F | 62°F | 43°F | 0.7" |
| March | 30°F | 69°F | 50°F | 0.4" |
| April | 35°F | 75°F | 56°F | 0.3" |
| May | 43°F | 84°F | 65°F | 0.3" |
| June | 51°F | 95°F | 75°F | 0.4" |
| July | 57°F | 100°F | 81°F | 0.2" |
| August | 53°F | 98°F | 78°F | 0.1" |
| September | 46°F | 90°F | 70°F | 0.1" |
| October | 37°F | 78°F | 57°F | 0.5" |
| November | 27°F | 67°F | 45°F | 0.1" |
| December | 21°F | 56°F | 37°F | 1.0" |
| Index | Wilkerson | California | National |
| Air quality index | 47 | 55 | 42 |
| Pollution index | 200,283 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 232 |
| Days with moderate air quality | 121 |
| Days w/ poor A.Q. for sensitive groups | 6 |
| Days with unhealthy air quality | 2 |
| Pollutant | Total |
| Arsenic | 0.280% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.230% |
| City | Population | Air Quality Index | National Avg. |
| Dixon Lane-Meadow Creek, CA | 2,524 | 47 | 6.0% |
| Mesa, CA | 434 | 47 | 6.0% |
| Big Pine, CA | 1,373 | 47 | 6.0% |
| Round Valley, CA | 493 | 47 | 6.0% |
| Bishop, CA | 3,747 | 47 | 6.0% |
| Wilkerson, CA | 495 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Gambell, AK | 495 | 38 | 24.0% |
| Isleton, CA | 495 | 45 | 10.0% |
| Ideal, GA | 495 | 39 | 22.0% |
| Hume, IL | 495 | 42 | 16.0% |
| Fairview, MO | 495 | 37 | 26.0% |
| Wilkerson, CA | 495 | 47 | 6.0% |
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