Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 17°F | 39°F | 27°F | 0.5" |
February | 19°F | 43°F | 29°F | 0.5" |
March | 27°F | 54°F | 39°F | 1.1" |
April | 34°F | 61°F | 46°F | 1.7" |
May | 42°F | 70°F | 55°F | 3.0" |
June | 51°F | 81°F | 65°F | 1.7" |
July | 59°F | 92°F | 75°F | 0.9" |
August | 56°F | 89°F | 72°F | 1.0" |
September | 48°F | 79°F | 62°F | 1.6" |
October | 38°F | 63°F | 49°F | 1.7" |
November | 27°F | 50°F | 37°F | 0.8" |
December | 16°F | 36°F | 25°F | 0.9" |
Index | Boyd | Montana | National |
Air quality index | 21 | 34 | 42 |
Pollution index | 218,962 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 362 |
Days with good air quality | 357 |
Days with moderate air quality | 4 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 1 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.002% |
Carbon Tetrachloride | 0.000% |
Lead | 0.000% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Joliet, MT | 633 | 21 | 58.0% |
Bridger, MT | 917 | 21 | 58.0% |
Columbus, MT | 1,964 | 21 | 58.0% |
Park City, MT | 1,090 | 21 | 58.0% |
Bridger CDP, MT | 20 | 21 | 58.0% |
Boyd, MT | 64 | 21 | 58.0% |
City | Population | Air Quality Index | National Avg. |
Theba, AZ | 64 | 74 | 48.0% |
Sandyville, IA | 64 | 39 | 22.0% |
La Prairie, IL | 64 | 41 | 18.0% |
Sidney, IN | 64 | 31 | 38.0% |
Reserve, KS | 64 | 43 | 14.0% |
Boyd, MT | 64 | 21 | 58.0% |