| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 58°F | 47°F | 3.8" |
| February | 39°F | 62°F | 50°F | 3.4" |
| March | 41°F | 66°F | 52°F | 3.0" |
| April | 42°F | 69°F | 55°F | 1.6" |
| May | 46°F | 74°F | 59°F | 0.5" |
| June | 50°F | 80°F | 64°F | 0.3" |
| July | 53°F | 81°F | 65°F | 0.0" |
| August | 53°F | 80°F | 64°F | 0.0" |
| September | 49°F | 82°F | 64°F | 0.1" |
| October | 45°F | 76°F | 59°F | 1.3" |
| November | 40°F | 66°F | 52°F | 1.8" |
| December | 36°F | 58°F | 47°F | 3.8" |
| Index | Montalvin Manor | California | National |
| Air quality index | 40 | 55 | 42 |
| Pollution index | 19,202,400 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 290 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.180% |
| Benzene | 0.140% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.280% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Alhambra Valley, CA | 1,079 | 40 | 20.0% |
| Orinda, CA | 19,891 | 40 | 20.0% |
| Saranap, CA | 6,163 | 40 | 20.0% |
| Emeryville, CA | 12,131 | 40 | 20.0% |
| Belvedere, CA | 2,297 | 40 | 20.0% |
| Montalvin Manor, CA | 2,554 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Kinsey, AL | 2,554 | 35 | 30.0% |
| Lawai, HI | 2,554 | 13 | 74.0% |
| Bloomfield, IN | 2,554 | 42 | 16.0% |
| Haw River, NC | 2,554 | 31 | 38.0% |
| Bethlehem, WV | 2,554 | 39 | 22.0% |
| Montalvin Manor, CA | 2,554 | 40 | 20.0% |