Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 8°F | 25°F | 16°F | 0.4" |
February | 10°F | 28°F | 18°F | 0.5" |
March | 25°F | 44°F | 33°F | 1.4" |
April | 36°F | 60°F | 46°F | 3.1" |
May | 47°F | 72°F | 59°F | 4.2" |
June | 58°F | 81°F | 69°F | 4.7" |
July | 61°F | 84°F | 72°F | 2.7" |
August | 59°F | 80°F | 69°F | 4.0" |
September | 50°F | 75°F | 62°F | 2.9" |
October | 38°F | 61°F | 49°F | 3.1" |
November | 25°F | 46°F | 35°F | 1.0" |
December | 12°F | 29°F | 20°F | 0.8" |
Index | Terril | Iowa | National |
Air quality index | 32 | 39 | 42 |
Pollution index | 1,563,560 | 1,154,535 | 2,726,193 |
Measurement | Total |
Days measured | 362 |
Days with good air quality | 327 |
Days with moderate air quality | 35 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.001% |
Lead | 0.000% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Wallingford, IA | 220 | 15 | 70.0% |
Emmetsburg, IA | 3,706 | 15 | 70.0% |
Graettinger, IA | 1,044 | 15 | 70.0% |
Estherville, IA | 5,729 | 15 | 70.0% |
Ruthven, IA | 771 | 15 | 70.0% |
Terril, IA | 343 | 32 | 36.0% |
City | Population | Air Quality Index | National Avg. |
Friendship, MD | 343 | 47 | 6.0% |
Boyne Falls, MI | 343 | 36 | 28.0% |
Leonard, MI | 343 | 38 | 24.0% |
Remer, MN | 343 | 29 | 42.0% |
Rushmore, MN | 343 | 36 | 28.0% |
Terril, IA | 343 | 32 | 36.0% |