Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 41°F | 59°F | 50°F | 2.8" |
February | 45°F | 62°F | 53°F | 3.1" |
March | 47°F | 65°F | 55°F | 2.9" |
April | 49°F | 67°F | 57°F | 1.8" |
May | 52°F | 69°F | 59°F | 0.4" |
June | 54°F | 72°F | 62°F | 0.3" |
July | 56°F | 73°F | 63°F | 0.0" |
August | 57°F | 73°F | 63°F | 0.0" |
September | 55°F | 76°F | 64°F | 0.1" |
October | 52°F | 73°F | 61°F | 1.0" |
November | 47°F | 65°F | 56°F | 1.9" |
December | 42°F | 59°F | 50°F | 4.1" |
Index | Arrowhead Marsh | Oakland | California |
Air quality index | 40 | 40 | 55 |
Pollution index | 19,202,400 | 19,202,400 | 10,473,190 |
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. |
Acalanes Ridge, CA | 875 | 40 | 20.0% |
Concord, CA | 129,227 | 40 | 20.0% |
Orinda, CA | 19,461 | 40 | 20.0% |
San Miguel CDP (San Luis Obispo County), CA | 2,696 | 40 | 20.0% |
Castro Valley, CA | 64,392 | 40 | 20.0% |
Oakland, CA | 422,575 | 40 | 20.0% |
City | Population | Air Quality Index | National Avg. |
London, ON | 421,456 | n/a | |
Minneapolis, MN | 424,536 | 46 | 8.0% |
Tulsa, OK | 402,441 | 45 | 10.0% |
Laval, QC | 445,050 | n/a | |
Arlington, TX | 397,269 | 51 | 2.0% |
Oakland, CA | 422,575 | 40 | 20.0% |