Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 39°F | 60°F | 48°F | 2.5" |
February | 42°F | 65°F | 53°F | 2.6" |
March | 46°F | 69°F | 56°F | 2.7" |
April | 48°F | 74°F | 60°F | 1.5" |
May | 52°F | 79°F | 63°F | 0.1" |
June | 56°F | 87°F | 69°F | 0.4" |
July | 58°F | 90°F | 71°F | 0.0" |
August | 58°F | 88°F | 70°F | 0.0" |
September | 57°F | 88°F | 70°F | 0.1" |
October | 52°F | 80°F | 64°F | 0.7" |
November | 44°F | 67°F | 54°F | 1.6" |
December | 39°F | 60°F | 49°F | 3.1" |
Index | Bethel Island | California | National |
Air quality index | 45 | 55 | 42 |
Pollution index | 13,698,500 | 10,473,190 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 229 |
Days with moderate air quality | 123 |
Days w/ poor A.Q. for sensitive groups | 12 |
Days with unhealthy air quality | 1 |
Pollutant | Total |
Arsenic | 0.040% |
Benzene | 0.110% |
Carbon Tetrachloride | 0.330% |
Lead | 0.070% |
Mercury | 0.120% |
City | Population | Air Quality Index | National Avg. |
Pittsburg, CA | 71,723 | 40 | 20.0% |
Antioch, CA | 111,468 | 45 | 10.0% |
Knightsen, CA | 1,100 | 45 | 10.0% |
Isleton, CA | 495 | 45 | 10.0% |
Brentwood, CA | 63,013 | 45 | 10.0% |
Bethel Island, CA | 2,015 | 45 | 10.0% |
City | Population | Air Quality Index | National Avg. |
Presquille, LA | 2,015 | 41 | 18.0% |
St. Bonaventure, NY | 2,015 | 9 | 82.0% |
Jonestown, TX | 2,015 | 44 | 12.0% |
Wilson-Conococheague, MD | 2,014 | 40 | 20.0% |
Steep Falls, ME | 2,016 | 40 | 20.0% |
Bethel Island, CA | 2,015 | 45 | 10.0% |