| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 60°F | 48°F | 2.1" |
| February | 38°F | 66°F | 52°F | 2.9" |
| March | 42°F | 72°F | 56°F | 2.3" |
| April | 46°F | 77°F | 61°F | 3.2" |
| May | 52°F | 83°F | 67°F | 1.0" |
| June | 63°F | 96°F | 80°F | 4.8" |
| July | 66°F | 98°F | 83°F | 1.0" |
| August | 65°F | 98°F | 82°F | 0.9" |
| September | 59°F | 91°F | 75°F | 1.7" |
| October | 50°F | 80°F | 65°F | 3.5" |
| November | 41°F | 69°F | 54°F | 1.0" |
| December | 35°F | 59°F | 46°F | 4.3" |
| Index | Spring Valley Lake | California | National |
| Air quality index | 89 | 55 | 42 |
| Pollution index | 31,575,300 | 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 | 0.110% |
| Benzene | 0.260% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.350% |
| Mercury | 0.280% |
| City | Population | Air Quality Index | National Avg. |
| Mountain View Acres, CA | 3,698 | 89 | 78.0% |
| Apple Valley, CA | 73,339 | 89 | 78.0% |
| Victorville, CA | 122,958 | 89 | 78.0% |
| Oak Hills, CA | 10,415 | 89 | 78.0% |
| Adelanto, CA | 34,238 | 89 | 78.0% |
| Spring Valley Lake, CA | 8,408 | 89 | 78.0% |
| City | Population | Air Quality Index | National Avg. |
| Greenville, MI | 8,407 | 38 | 24.0% |
| Socorro, NM | 8,406 | 53 | 6.0% |
| Arab, AL | 8,405 | 44 | 12.0% |
| Cape St. Claire, MD | 8,405 | 46 | 8.0% |
| Westwego, LA | 8,411 | 45 | 10.0% |
| Spring Valley Lake, CA | 8,408 | 89 | 78.0% |
Here are the best places to live in California
These are the 10 cheapest cities in California
Most Dangerous States In The US
Check out the 10 safest cities in California