Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 13°F | 34°F | 23°F | 0.3" |
February | 14°F | 36°F | 24°F | 0.3" |
March | 21°F | 46°F | 32°F | 0.3" |
April | 29°F | 56°F | 41°F | 1.1" |
May | 36°F | 65°F | 50°F | 1.2" |
June | 44°F | 74°F | 59°F | 2.5" |
July | 49°F | 85°F | 67°F | 0.9" |
August | 48°F | 83°F | 65°F | 0.8" |
September | 41°F | 72°F | 55°F | 1.1" |
October | 32°F | 58°F | 44°F | 0.6" |
November | 20°F | 43°F | 30°F | 0.5" |
December | 11°F | 32°F | 21°F | 0.2" |
Index | Heart Butte | Montana | National |
Air quality index | 37 | 34 | 42 |
Pollution index | 260,100 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 302 |
Days with moderate air quality | 62 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.004% |
Carbon Tetrachloride | 0.000% |
Lead | 0.002% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Heart Butte, MT | 609 | 37 | 26.0% |
City | Population | Air Quality Index | National Avg. |
Brooksville, KY | 609 | 54 | 8.0% |
Dansville, MI | 609 | 36 | 28.0% |
Buffalo Gap, TX | 609 | 33 | 34.0% |
South Royalton, VT | 609 | 34 | 32.0% |
Tazlina, AK | 608 | 31 | 38.0% |
Heart Butte, MT | 609 | 37 | 26.0% |