Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 9°F | 24°F | 16°F | 0.8" |
February | 13°F | 30°F | 21°F | 0.7" |
March | 16°F | 34°F | 25°F | 0.5" |
April | 29°F | 48°F | 39°F | 0.3" |
May | 38°F | 61°F | 50°F | 0.4" |
June | 46°F | 66°F | 56°F | 1.0" |
July | 50°F | 69°F | 58°F | 1.6" |
August | 48°F | 66°F | 56°F | 2.1" |
September | 41°F | 57°F | 48°F | 2.1" |
October | 29°F | 45°F | 36°F | 0.9" |
November | 13°F | 28°F | 20°F | 0.6" |
December | 11°F | 26°F | 18°F | 0.8" |
Index | Butte | Alaska | National |
Air quality index | 31 | 30 | 42 |
Pollution index | 7,145,440 | 11,243,194 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 262 |
Days with moderate air quality | 92 |
Days w/ poor A.Q. for sensitive groups | 7 |
Days with unhealthy air quality | 4 |
Pollutant | Total |
Arsenic | 0.030% |
Benzene | 0.130% |
Carbon Tetrachloride | 0.020% |
Lead | 0.140% |
Mercury | 0.001% |
City | Population | Air Quality Index | National Avg. |
Gateway, AK | 5,965 | 31 | 38.0% |
Palmer, AK | 7,359 | 31 | 38.0% |
Buffalo Soapstone, AK | 937 | 31 | 38.0% |
Knik River, AK | 807 | 31 | 38.0% |
Tanaina, AK | 10,449 | 31 | 38.0% |
Butte, AK | 3,888 | 31 | 38.0% |
City | Population | Air Quality Index | National Avg. |
Canton, TX | 3,888 | 36 | 28.0% |
Saint-Ambroise, QC | 3,888 | n/a | |
Colorado City, TX | 3,887 | 28 | 44.0% |
Métabetchouan--Lac-à-la-Croix, QC | 3,887 | n/a | |
Angels, CA | 3,889 | 39 | 22.0% |
Butte, AK | 3,888 | 31 | 38.0% |