| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 57°F | 46°F | 3.3" |
| February | 40°F | 63°F | 51°F | 2.9" |
| March | 43°F | 68°F | 55°F | 2.6" |
| April | 46°F | 74°F | 59°F | 1.6" |
| May | 51°F | 83°F | 66°F | 0.5" |
| June | 57°F | 91°F | 72°F | 0.3" |
| July | 59°F | 96°F | 76°F | 0.0" |
| August | 58°F | 94°F | 74°F | 0.0" |
| September | 55°F | 91°F | 71°F | 0.1" |
| October | 49°F | 80°F | 63°F | 0.9" |
| November | 42°F | 66°F | 53°F | 1.8" |
| December | 37°F | 57°F | 46°F | 3.4" |
| Index | Elverta | California | National |
| Air quality index | 55 | 55 | 50 |
| Pollution index | 15,476,500 | 18,106,726 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 155 |
| Days with moderate air quality | 175 |
| Days w/ poor A.Q. for sensitive groups | 31 |
| Days with unhealthy air quality | 4 |
| Pollutant | Total |
| Arsenic | 0.090% |
| Benzene | 0.130% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.130% |
| Mercury | 0.070% |
| City, State | Population | Air Quality Index | National Avg. |
| Nicolaus, CA | 205 | 42 | 16% |
| East Nicolaus, CA | 207 | 42 | 16% |
| Robbins, CA | 322 | 42 | 16% |
| Trowbridge, CA | 246 | 42 | 16% |
| Citrus Heights, CA | 85,954 | 55 | 10% |
| Elverta, CA | 5,424 | 55 | 10% |
| City, State | Population | Air Quality Index | National Avg. |
| Fellsmere, FL | 5,424 | 34 | 32% |
| Mount Carmel, TN | 5,425 | 45 | 10% |
| Cumberland, IN | 5,422 | 59 | 18% |
| Pinckneyville, IL | 5,422 | 39 | 22% |
| Center, TX | 5,421 | 43 | 14% |
| Elverta, CA | 5,424 | 55 | 10% |