| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 60°F | 46°F | 6.0" |
| February | 39°F | 64°F | 50°F | 5.7" |
| March | 41°F | 67°F | 52°F | 4.6" |
| April | 43°F | 71°F | 55°F | 2.4" |
| May | 46°F | 77°F | 60°F | 1.1" |
| June | 50°F | 83°F | 64°F | 0.4" |
| July | 52°F | 85°F | 65°F | 0.0" |
| August | 52°F | 84°F | 64°F | 0.0" |
| September | 49°F | 85°F | 64°F | 0.2" |
| October | 46°F | 78°F | 59°F | 2.0" |
| November | 41°F | 67°F | 52°F | 3.2" |
| December | 36°F | 59°F | 46°F | 6.9" |
| Index | Cotati | California | National |
| Air quality index | 34 | 55 | 42 |
| Pollution index | 7,898,290 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 346 |
| Days with moderate air quality | 18 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.260% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.240% |
| Mercury | 0.270% |
| City | Population | Air Quality Index | National Avg. |
| Kenwood, CA | 540 | 34 | 32.0% |
| Rohnert Park, CA | 42,559 | 34 | 32.0% |
| Dillon Beach, CA | 309 | 34 | 32.0% |
| Sebastopol, CA | 7,664 | 34 | 32.0% |
| Larkfield-Wikiup, CA | 8,080 | 34 | 32.0% |
| Cotati, CA | 7,487 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Albertville, MN | 7,483 | 46 | 8.0% |
| Robinwood, MD | 7,482 | 40 | 20.0% |
| Mount Horeb, WI | 7,494 | 39 | 22.0% |
| Lake Lorraine, FL | 7,495 | 31 | 38.0% |
| Greenville, AL | 7,478 | 52 | 4.0% |
| Cotati, CA | 7,487 | 34 | 32.0% |
Here are the best places to live in California
Safest Cities In The US
See the best places to live in Cotati
Check out the 10 most dangerous cities in California