| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 58°F | 47°F | 3.3" |
| February | 41°F | 63°F | 51°F | 3.1" |
| March | 44°F | 68°F | 55°F | 2.9" |
| April | 47°F | 74°F | 59°F | 1.8" |
| May | 52°F | 82°F | 65°F | 0.5" |
| June | 57°F | 90°F | 71°F | 0.3" |
| July | 59°F | 95°F | 74°F | 0.0" |
| August | 58°F | 93°F | 73°F | 0.0" |
| September | 56°F | 90°F | 70°F | 0.1" |
| October | 50°F | 79°F | 63°F | 1.2" |
| November | 43°F | 66°F | 53°F | 1.6" |
| December | 38°F | 57°F | 47°F | 3.8" |
| Index | Hagginwood | Sacramento | California |
| Air quality index | 52 | 52 | 55 |
| Pollution index | 15,476,500 | 15,476,500 | 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 | 0.090% |
| Benzene | 0.130% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.130% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Freeport, CA | 70 | 52 | 4.0% |
| Carmichael, CA | 75,642 | 52 | 4.0% |
| Foothill Farms, CA | 35,711 | 52 | 4.0% |
| McClellan Park, CA | 843 | 52 | 4.0% |
| Rio Linda, CA | 16,115 | 52 | 4.0% |
| Sacramento, CA | 503,482 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Mesa, AZ | 508,918 | 74 | 48.0% |
| Atlanta, GA | 497,642 | 52 | 4.0% |
| Kansas City, MO | 491,158 | 47 | 6.0% |
| Fresno, CA | 526,147 | 60 | 20.0% |
| Omaha, NE | 479,529 | 40 | 20.0% |
| Sacramento, CA | 503,482 | 52 | 4.0% |
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