| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 53°F | 44°F | 6.0" |
| February | 40°F | 56°F | 49°F | 6.4" |
| March | 41°F | 57°F | 50°F | 6.8" |
| April | 40°F | 56°F | 49°F | 5.8" |
| May | 45°F | 59°F | 53°F | 3.6" |
| June | 47°F | 61°F | 55°F | 3.9" |
| July | 52°F | 65°F | 58°F | 1.0" |
| August | 50°F | 63°F | 56°F | 0.3" |
| September | 46°F | 63°F | 54°F | 0.4" |
| October | 44°F | 61°F | 53°F | 5.6" |
| November | 40°F | 58°F | 49°F | 4.0" |
| December | 39°F | 54°F | 47°F | 11.4" |
| Index | Bayview CDP (Contra Costa County) | California | National |
| Air quality index | 27 | 55 | 42 |
| Pollution index | 5,642,310 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 353 |
| Days with moderate air quality | 10 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.050% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Arcata, CA | 18,266 | 27 | 46.0% |
| Fieldbrook, CA | 793 | 27 | 46.0% |
| McKinleyville, CA | 16,645 | 27 | 46.0% |
| Bayview, CA | 2,787 | 27 | 46.0% |
| Humboldt Hill, CA | 3,435 | 27 | 46.0% |
| Bayview CDP (Contra Costa County), CA | 1,753 | 27 | 46.0% |
| City | Population | Air Quality Index | National Avg. |
| Hodgkins, IL | 1,753 | 55 | 10.0% |
| Williamsport, IN | 1,753 | 42 | 16.0% |
| Granite, OK | 1,753 | 43 | 14.0% |
| Cleveland, WI | 1,753 | 38 | 24.0% |
| Durand, WI | 1,753 | 34 | 32.0% |
| Bayview CDP (Contra Costa County), CA | 1,753 | 27 | 46.0% |
Here are the best places to live in California
Most Dangerous States In The US
See the best places to live in Bayview CDP (Contra Costa County)
These are the largest cities in California