| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 63°F | 47°F | 2.7" |
| February | 38°F | 65°F | 50°F | 1.9" |
| March | 40°F | 71°F | 53°F | 1.5" |
| April | 41°F | 76°F | 57°F | 0.8" |
| May | 46°F | 83°F | 62°F | 0.3" |
| June | 50°F | 91°F | 69°F | 0.0" |
| July | 55°F | 95°F | 72°F | 0.3" |
| August | 54°F | 95°F | 71°F | 0.0" |
| September | 51°F | 92°F | 68°F | 0.0" |
| October | 45°F | 82°F | 61°F | 0.5" |
| November | 38°F | 71°F | 53°F | 0.7" |
| December | 34°F | 62°F | 46°F | 1.7" |
| Index | San Lucas | California | National |
| Air quality index | 37 | 55 | 42 |
| Pollution index | 9,602,130 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 330 |
| Days with moderate air quality | 34 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.190% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.080% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| King City, CA | 14,253 | 37 | 26.0% |
| Pine Canyon, CA | 3,055 | 37 | 26.0% |
| Greenfield CDP, CA | 4,762 | 37 | 26.0% |
| Greenfield, CA | 18,212 | 37 | 26.0% |
| Lockwood, CA | 361 | 46 | 8.0% |
| San Lucas, CA | 429 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Kasigluk, AK | 429 | 31 | 38.0% |
| Rosston, AR | 429 | 32 | 36.0% |
| June Lake, CA | 429 | 47 | 6.0% |
| River Pines, CA | 429 | 52 | 4.0% |
| Smith Corner, CA | 429 | 67 | 34.0% |
| San Lucas, CA | 429 | 37 | 26.0% |