Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 11°F | 40°F | 24°F | 0.6" |
February | 14°F | 42°F | 27°F | 0.8" |
March | 23°F | 54°F | 37°F | 1.2" |
April | 29°F | 60°F | 44°F | 1.9" |
May | 37°F | 68°F | 52°F | 3.4" |
June | 46°F | 81°F | 63°F | 2.0" |
July | 53°F | 92°F | 73°F | 0.9" |
August | 51°F | 90°F | 69°F | 0.6" |
September | 42°F | 80°F | 59°F | 1.7" |
October | 32°F | 64°F | 46°F | 1.7" |
November | 20°F | 51°F | 34°F | 1.0" |
December | 10°F | 37°F | 22°F | 0.7" |
Index | Birney | Montana | National |
Air quality index | 39 | 34 | 42 |
Pollution index | 562,118 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 325 |
Days with moderate air quality | 40 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.001% |
Lead | 0.002% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Birney, MT | 150 | 39 | 22.0% |
City | Population | Air Quality Index | National Avg. |
Deering, AK | 150 | 38 | 24.0% |
Nightmute, AK | 150 | 31 | 38.0% |
Port Graham, AK | 150 | 31 | 38.0% |
Garden City, IA | 150 | 37 | 26.0% |
Palmer, IA | 150 | 37 | 26.0% |
Birney, MT | 150 | 39 | 22.0% |