Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 45°F | 62°F | 52°F | 19.1" |
February | 46°F | 65°F | 54°F | 5.8" |
March | 47°F | 69°F | 56°F | 3.2" |
April | 47°F | 73°F | 58°F | 3.0" |
May | 53°F | 79°F | 64°F | 0.6" |
June | 59°F | 87°F | 71°F | 0.0" |
July | 65°F | 96°F | 79°F | 0.0" |
August | 63°F | 94°F | 76°F | 0.0" |
September | 61°F | 90°F | 74°F | 28.1" |
October | 57°F | 81°F | 67°F | 5.9" |
November | 53°F | 74°F | 61°F | 1.3" |
December | 44°F | 63°F | 52°F | 4.0" |
Index | Castaic | California | National |
Air quality index | 72 | 55 | 42 |
Pollution index | 139,490,000 | 10,473,190 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 66 |
Days with moderate air quality | 208 |
Days w/ poor A.Q. for sensitive groups | 62 |
Days with unhealthy air quality | 28 |
Pollutant | Total |
Arsenic | 0.200% |
Benzene | 0.950% |
Carbon Tetrachloride | 0.080% |
Lead | 1.320% |
Mercury | 0.440% |
City | Population | Air Quality Index | National Avg. |
Piru, CA | 2,126 | 46 | 8.0% |
Moorpark, CA | 36,443 | 46 | 8.0% |
Santa Clarita, CA | 212,519 | 72 | 44.0% |
Hasley Canyon, CA | 1,433 | 72 | 44.0% |
Simi Valley, CA | 125,768 | 72 | 44.0% |
Castaic, CA | 18,479 | 72 | 44.0% |
City | Population | Air Quality Index | National Avg. |
Brook Park, OH | 18,486 | 50 | = 100 |
Orange, TX | 18,458 | 45 | 10.0% |
Weirton, WV | 18,458 | 46 | 8.0% |
Terrell, TX | 18,513 | 51 | 2.0% |
Chowchilla, CA | 18,443 | 50 | = 100 |
Castaic, CA | 18,479 | 72 | 44.0% |