Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 46°F | 72°F | 57°F | 2.3" |
February | 48°F | 72°F | 58°F | 1.7" |
March | 51°F | 75°F | 61°F | 1.0" |
April | 54°F | 76°F | 64°F | 0.5" |
May | 58°F | 78°F | 66°F | 0.3" |
June | 62°F | 81°F | 70°F | 0.0" |
July | 66°F | 86°F | 74°F | 0.1" |
August | 66°F | 88°F | 75°F | 0.0" |
September | 65°F | 88°F | 74°F | 0.2" |
October | 59°F | 83°F | 69°F | 0.4" |
November | 52°F | 77°F | 63°F | 0.6" |
December | 45°F | 70°F | 56°F | 2.5" |
Index | Covina | California | National |
Air quality index | 89 | 55 | 42 |
Pollution index | 139,490,000 | 10,473,190 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 42 |
Days with moderate air quality | 178 |
Days w/ poor A.Q. for sensitive groups | 79 |
Days with unhealthy air quality | 58 |
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. |
Azusa, CA | 49,584 | 72 | 44.0% |
Citrus, CA | 10,105 | 72 | 44.0% |
La Puente, CA | 39,780 | 72 | 44.0% |
Vincent, CA | 16,405 | 72 | 44.0% |
Fullerton, CA | 141,061 | 72 | 44.0% |
Covina, CA | 47,787 | 89 | 78.0% |
City | Population | Air Quality Index | National Avg. |
Roswell, NM | 47,751 | 15 | 70.0% |
Dublin, OH | 47,824 | 46 | 8.0% |
Minot, ND | 47,834 | 36 | 28.0% |
Cornwall, ON | 47,736 | n/a | |
Monroe, LA | 47,906 | 34 | 32.0% |
Covina, CA | 47,787 | 89 | 78.0% |