Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 49°F | 68°F | 58°F | 2.0" |
February | 51°F | 68°F | 59°F | 1.8" |
March | 54°F | 69°F | 61°F | 1.1" |
April | 56°F | 70°F | 63°F | 0.6" |
May | 60°F | 71°F | 65°F | 0.3" |
June | 63°F | 73°F | 67°F | 0.0" |
July | 67°F | 77°F | 71°F | 0.2" |
August | 68°F | 78°F | 72°F | 0.1" |
September | 66°F | 79°F | 72°F | 0.2" |
October | 61°F | 77°F | 68°F | 0.7" |
November | 55°F | 73°F | 64°F | 0.9" |
December | 50°F | 68°F | 58°F | 2.3" |
Index | National City | California | National |
Air quality index | 64 | 55 | 42 |
Pollution index | 45,820,500 | 10,473,190 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 87 |
Days with moderate air quality | 253 |
Days w/ poor A.Q. for sensitive groups | 23 |
Days with unhealthy air quality | 2 |
Pollutant | Total |
Arsenic | 1.130% |
Benzene | 0.410% |
Carbon Tetrachloride | 0.030% |
Lead | 0.600% |
Mercury | 0.080% |
City | Population | Air Quality Index | National Avg. |
Crest, CA | 2,721 | 64 | 28.0% |
La Mesa, CA | 60,208 | 64 | 28.0% |
Bonita, CA | 12,470 | 64 | 28.0% |
Jamul, CA | 5,776 | 64 | 28.0% |
Spring Valley CDP (Lake County), CA | 1,154 | 64 | 28.0% |
National City, CA | 61,342 | 64 | 28.0% |
City | Population | Air Quality Index | National Avg. |
Reston, VA | 61,418 | 47 | 6.0% |
Spring, TX | 61,514 | 52 | 4.0% |
Taylor, MI | 61,164 | 56 | 12.0% |
Burnsville, MN | 61,536 | 46 | 8.0% |
Aurora, ON | 61,058 | n/a | |
National City, CA | 61,342 | 64 | 28.0% |