| 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 | Wildhorse | Davis | California |
| Air quality index | 52 | 52 | 55 |
| Pollution index | 3,319,120 | 3,319,120 | 10,473,190 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 171 |
| Days with moderate air quality | 173 |
| Days w/ poor A.Q. for sensitive groups | 21 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.100% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.070% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Vacaville, CA | 99,958 | 35 | 30.0% |
| Allendale, CA | 1,429 | 35 | 30.0% |
| Winters, CA | 7,285 | 35 | 30.0% |
| Hartley, CA | 2,655 | 35 | 30.0% |
| Elmira, CA | 234 | 35 | 30.0% |
| Davis, CA | 68,640 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Dothan, AL | 68,608 | 35 | 30.0% |
| Camarillo, CA | 68,583 | 46 | 8.0% |
| Daytona Beach, FL | 68,711 | 37 | 26.0% |
| Eau Claire, WI | 68,720 | 34 | 32.0% |
| North Port, FL | 68,779 | 36 | 28.0% |
| Davis, CA | 68,640 | 52 | 4.0% |
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