| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 58°F | 46°F | 3.5" |
| February | 40°F | 63°F | 51°F | 3.4" |
| March | 44°F | 68°F | 55°F | 3.2" |
| April | 47°F | 75°F | 60°F | 1.9" |
| May | 52°F | 84°F | 67°F | 0.7" |
| June | 58°F | 93°F | 75°F | 0.4" |
| July | 61°F | 98°F | 78°F | 0.0" |
| August | 59°F | 96°F | 76°F | 0.0" |
| September | 56°F | 92°F | 72°F | 0.2" |
| October | 49°F | 80°F | 63°F | 1.2" |
| November | 42°F | 66°F | 53°F | 2.1" |
| December | 37°F | 57°F | 46°F | 3.6" |
| Index | Yuba City | California | National |
| Air quality index | 44 | 55 | 42 |
| Pollution index | 2,024,690 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 239 |
| Days with moderate air quality | 124 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Marysville, CA | 12,718 | 44 | 12.0% |
| Linda, CA | 22,530 | 44 | 12.0% |
| Wheatland, CA | 3,710 | 44 | 12.0% |
| Meridian, CA | 290 | 44 | 12.0% |
| Olivehurst, CA | 15,611 | 44 | 12.0% |
| Yuba City, CA | 68,813 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Tamarac, FL | 68,686 | 41 | 18.0% |
| Portland, ME | 68,956 | 40 | 20.0% |
| South San Francisco, CA | 68,998 | 40 | 20.0% |
| Alpharetta, GA | 69,031 | 52 | 4.0% |
| Mount Vernon, NY | 69,130 | 51 | 2.0% |
| Yuba City, CA | 68,813 | 44 | 12.0% |