Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | -4°F | 16°F | 6°F | 11.4" |
February | -4°F | 17°F | 6°F | 3.4" |
March | 12°F | 31°F | 21°F | 2.2" |
April | 27°F | 51°F | 38°F | 1.3" |
May | 38°F | 65°F | 51°F | 2.8" |
June | 50°F | 74°F | 61°F | 4.0" |
July | 53°F | 78°F | 65°F | 2.5" |
August | 51°F | 78°F | 63°F | 2.6" |
September | 44°F | 71°F | 56°F | 3.1" |
October | 31°F | 54°F | 41°F | 0.8" |
November | 17°F | 36°F | 25°F | 1.2" |
December | -1°F | 17°F | 8°F | 7.7" |
Index | Perth | North Dakota | National |
Air quality index | 36 | 35 | 42 |
Pollution index | 408,578 | 1,038,665 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 320 |
Days with moderate air quality | 45 |
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 | 0.001% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Bisbee, ND | 73 | 36 | 28.0% |
Wolford, ND | 22 | 36 | 28.0% |
Green Acres, ND | 618 | 36 | 28.0% |
Rocklake, ND | 114 | 36 | 28.0% |
Mylo, ND | 31 | 36 | 28.0% |
Perth, ND | 10 | 36 | 28.0% |
City | Population | Air Quality Index | National Avg. |
Memphis, AL | 10 | 35 | 30.0% |
Indian Falls, CA | 10 | 46 | 8.0% |
Bolan, IA | 10 | 15 | 70.0% |
Hepburn, IA | 10 | 40 | 20.0% |
Jacksonville, IA | 10 | 40 | 20.0% |
Perth, ND | 10 | 36 | 28.0% |