Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 12°F | 29°F | 20°F | 1.9" |
February | 16°F | 32°F | 24°F | 2.2" |
March | 30°F | 51°F | 39°F | 4.5" |
April | 40°F | 63°F | 51°F | 9.1" |
May | 51°F | 74°F | 62°F | 9.6" |
June | 62°F | 83°F | 72°F | 7.8" |
July | 63°F | 86°F | 74°F | 6.7" |
August | 63°F | 83°F | 72°F | 8.6" |
September | 54°F | 79°F | 66°F | 5.4" |
October | 44°F | 66°F | 54°F | 6.3" |
November | 29°F | 50°F | 38°F | 3.0" |
December | 13°F | 27°F | 21°F | 2.4" |
Index | Roland | Iowa | National |
Air quality index | 37 | 39 | 42 |
Pollution index | 1,171,930 | 1,154,535 | 2,726,193 |
Measurement | Total |
Days measured | 214 |
Days with good air quality | 210 |
Days with moderate air quality | 4 |
Days w/ poor A.Q. for sensitive groups | |
Days with unhealthy air quality |
Pollutant | Total |
Arsenic | 0.060% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.002% |
Lead | 0.004% |
Mercury | 0.050% |
City | Population | Air Quality Index | National Avg. |
Ames, IA | 66,361 | 37 | 26.0% |
Stanhope, IA | 492 | 37 | 26.0% |
Randall, IA | 154 | 37 | 26.0% |
McCallsburg, IA | 479 | 37 | 26.0% |
Colo, IA | 764 | 37 | 26.0% |
Roland, IA | 1,374 | 37 | 26.0% |
City | Population | Air Quality Index | National Avg. |
Stewiacke, NS | 1,374 | n/a | |
White Fish Lake 128, AB | 1,374 | n/a | |
Big Pine, CA | 1,373 | 47 | 6.0% |
Vander, NC | 1,375 | 41 | 18.0% |
Wakefield, NE | 1,375 | 35 | 30.0% |
Roland, IA | 1,374 | 37 | 26.0% |