Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 38°F | 57°F | 47°F | 10.1" |
February | 41°F | 62°F | 51°F | 8.0" |
March | 44°F | 67°F | 55°F | 8.4" |
April | 46°F | 74°F | 59°F | 4.6" |
May | 53°F | 83°F | 68°F | 2.6" |
June | 58°F | 91°F | 75°F | 2.6" |
July | 62°F | 96°F | 79°F | 0.2" |
August | 60°F | 95°F | 77°F | 0.4" |
September | 57°F | 90°F | 73°F | 1.3" |
October | 50°F | 79°F | 63°F | 4.8" |
November | 43°F | 65°F | 53°F | 7.5" |
December | 37°F | 56°F | 46°F | 9.8" |
Index | Alta Sierra | California | National |
Air quality index | 44 | 55 | 42 |
Pollution index | 4,289,310 | 10,473,190 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 239 |
Days with moderate air quality | 124 |
Days w/ poor A.Q. for sensitive groups | 2 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.050% |
Benzene | 0.070% |
Carbon Tetrachloride | 0.001% |
Lead | 0.060% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Grass Valley, CA | 12,817 | 44 | 12.0% |
Rough and Ready, CA | 511 | 44 | 12.0% |
Meadow Vista, CA | 3,508 | 44 | 12.0% |
Lake Wildwood, CA | 4,709 | 44 | 12.0% |
Smartsville, CA | 487 | 44 | 12.0% |
Alta Sierra, CA | 7,620 | 44 | 12.0% |
City | Population | Air Quality Index | National Avg. |
Kent, BC | 7,619 | n/a | |
Rhinelander, WI | 7,617 | 34 | 32.0% |
Decorah, IA | 7,615 | 35 | 30.0% |
Pulaski, TN | 7,614 | 27 | 46.0% |
Comox Valley B (Lazo North), BC | 7,614 | n/a | |
Alta Sierra, CA | 7,620 | 44 | 12.0% |