| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 60°F | 47°F | 5.0" |
| February | 39°F | 64°F | 51°F | 4.6" |
| March | 42°F | 68°F | 54°F | 4.3" |
| April | 45°F | 74°F | 59°F | 2.5" |
| May | 53°F | 84°F | 69°F | 1.4" |
| June | 61°F | 94°F | 77°F | 1.0" |
| July | 66°F | 102°F | 84°F | 0.1" |
| August | 63°F | 100°F | 82°F | 0.0" |
| September | 57°F | 94°F | 75°F | 0.5" |
| October | 49°F | 80°F | 64°F | 2.2" |
| November | 40°F | 67°F | 52°F | 3.5" |
| December | 36°F | 58°F | 46°F | 6.1" |
| Index | Shasta | California | National |
| Air quality index | 42 | 55 | 42 |
| Pollution index | 5,642,310 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 311 |
| Days with moderate air quality | 53 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.050% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Anderson, CA | 10,479 | 42 | 16.0% |
| Mountain Gate, CA | 703 | 42 | 16.0% |
| Bella Vista, CA | 3,320 | 42 | 16.0% |
| Palo Cedro, CA | 2,893 | 42 | 16.0% |
| French Gulch, CA | 441 | 42 | 16.0% |
| Shasta, CA | 1,639 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Monona, IA | 1,639 | 29 | 42.0% |
| Worthington, KY | 1,639 | 14 | 72.0% |
| Bear Creek, AL | 1,638 | 37 | 26.0% |
| Callender, CA | 1,638 | 46 | 8.0% |
| Poquonock Bridge, CT | 1,640 | 37 | 26.0% |
| Shasta, CA | 1,639 | 42 | 16.0% |
Here are the best places to live in California
Check out the 10 safest cities in California
See the best places to live in Shasta
Most Dangerous States In The US