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 | Norwalk | California | National |
Air quality index | 72 | 55 | 50 |
Pollution index | 139,490,000 | 18,106,726 | 5,066,862 |
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, State | Population | Air Quality Index | National Avg. |
Compton, CA | 97,740 | 72 | 44% |
Lomita, CA | 20,652 | 72 | 44% |
Paramount, CA | 54,941 | 72 | 44% |
Vernon, CA | 101 | 72 | 44% |
Inglewood, CA | 111,012 | 72 | 44% |
Norwalk, CA | 106,360 | 72 | 44% |
City, State | Population | Air Quality Index | National Avg. |
Pearland, TX | 106,238 | 52 | 4% |
Palm Bay, FL | 106,573 | 36 | 28% |
Everett, WA | 106,580 | 45 | 10% |
Highlands Ranch, CO | 106,596 | 58 | 16% |
North Charleston, SC | 106,113 | 38 | 24% |
Norwalk, CA | 106,360 | 72 | 44% |