Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 17°F | 44°F | 29°F | 3.5" |
February | 20°F | 46°F | 32°F | 3.4" |
March | 24°F | 50°F | 36°F | 2.7" |
April | 28°F | 56°F | 41°F | 1.6" |
May | 33°F | 64°F | 48°F | 1.5" |
June | 39°F | 74°F | 57°F | 0.6" |
July | 44°F | 83°F | 64°F | 0.3" |
August | 42°F | 81°F | 62°F | 0.5" |
September | 37°F | 75°F | 56°F | 0.4" |
October | 31°F | 64°F | 45°F | 2.1" |
November | 25°F | 53°F | 37°F | 1.9" |
December | 19°F | 45°F | 31°F | 3.7" |
Index | Rail Road Flat | California | National |
Air quality index | 39 | 55 | 42 |
Pollution index | 1,641,280 | 10,473,190 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 331 |
Days with moderate air quality | 33 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality |
Pollutant | Total |
Arsenic | 0.090% |
Benzene | 0.030% |
Carbon Tetrachloride | 0.000% |
Lead | 0.020% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Mokelumne Hill, CA | 484 | 39 | 22.0% |
Pine Grove, CA | 2,070 | 39 | 22.0% |
Volcano, CA | 45 | 39 | 22.0% |
Dorrington, CA | 407 | 39 | 22.0% |
San Andreas, CA | 3,729 | 39 | 22.0% |
Rail Road Flat, CA | 97 | 39 | 22.0% |
City | Population | Air Quality Index | National Avg. |
Ben Lomond, AR | 97 | 39 | 22.0% |
Anegam, AZ | 97 | 47 | 6.0% |
Three Rocks, CA | 97 | 50 | = 100 |
Tuttle, CA | 97 | 48 | 4.0% |
Pritchett, CO | 97 | 20 | 60.0% |
Rail Road Flat, CA | 97 | 39 | 22.0% |