| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 73°F | 56°F | 4.3" |
| February | 38°F | 72°F | 54°F | 2.6" |
| March | 42°F | 76°F | 58°F | 2.9" |
| April | 44°F | 79°F | 61°F | 2.8" |
| May | 48°F | 81°F | 65°F | 1.6" |
| June | 53°F | 85°F | 69°F | 5.5" |
| July | 58°F | 89°F | 73°F | 2.7" |
| August | 59°F | 92°F | 75°F | 1.5" |
| September | 56°F | 93°F | 74°F | 4.5" |
| October | 48°F | 85°F | 66°F | 8.5" |
| November | 41°F | 76°F | 58°F | 0.9" |
| December | 36°F | 71°F | 53°F | 1.5" |
| Index | Temescal Valley | California | National |
| Air quality index | 89 | 55 | 42 |
| Pollution index | 22,790,900 | 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 | 0.060% |
| Benzene | 0.190% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.220% |
| Mercury | 0.230% |
| City | Population | Air Quality Index | National Avg. |
| Riverside, CA | 327,569 | 89 | 78.0% |
| Eastvale, CA | 65,766 | 89 | 78.0% |
| Canyon Lake, CA | 11,237 | 89 | 78.0% |
| Meadowbrook, CA | 4,208 | 89 | 78.0% |
| Las Flores, CA | 5,089 | 89 | 78.0% |
| Temescal Valley, CA | 28,420 | 89 | 78.0% |
| City | Population | Air Quality Index | National Avg. |
| Williamsport, PA | 28,437 | 35 | 30.0% |
| Woolwich, ON | 28,438 | n/a | |
| Jacksonville, AR | 28,442 | 45 | 10.0% |
| Burbank, IL | 28,447 | 55 | 10.0% |
| Englewood, NJ | 28,390 | 51 | 2.0% |
| Temescal Valley, CA | 28,420 | 89 | 78.0% |
Here are the best places to live in California
Check out the 10 safest cities in California
Most Dangerous Cities In The US
These are the 10 cheapest cities in California