Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 14°F | 34°F | 23°F | 0.1" |
February | 18°F | 40°F | 27°F | 0.3" |
March | 23°F | 47°F | 33°F | 0.7" |
April | 29°F | 55°F | 40°F | 1.6" |
May | 37°F | 65°F | 50°F | 1.9" |
June | 43°F | 72°F | 57°F | 2.2" |
July | 50°F | 85°F | 67°F | 1.3" |
August | 47°F | 83°F | 64°F | 0.9" |
September | 40°F | 73°F | 55°F | 1.2" |
October | 32°F | 57°F | 42°F | 1.3" |
November | 23°F | 45°F | 33°F | 0.5" |
December | 11°F | 31°F | 20°F | 0.2" |
Index | Alder | Montana | National |
Air quality index | 20 | 34 | 42 |
Pollution index | 293,782 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 363 |
Days with good air quality | 319 |
Days with moderate air quality | 44 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.004% |
Carbon Tetrachloride | 0.000% |
Lead | 0.000% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Sheridan, MT | 869 | 20 | 60.0% |
Virginia City, MT | 169 | 25 | 50.0% |
Alder, MT | 93 | 20 | 60.0% |
City | Population | Air Quality Index | National Avg. |
Diomede, AK | 93 | 38 | 24.0% |
Sun Valley, AZ | 93 | 44 | 12.0% |
Glasgow, IL | 93 | 40 | 20.0% |
Sims, IN | 93 | 37 | 26.0% |
Highland Beach, MD | 93 | 46 | 8.0% |
Alder, MT | 93 | 20 | 60.0% |