Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 13°F | 31°F | 21°F | 2.9" |
February | 15°F | 33°F | 23°F | 2.6" |
March | 29°F | 49°F | 38°F | 4.2" |
April | 39°F | 62°F | 50°F | 6.5" |
May | 51°F | 74°F | 61°F | 6.2" |
June | 61°F | 82°F | 71°F | 7.9" |
July | 64°F | 84°F | 73°F | 6.6" |
August | 61°F | 82°F | 71°F | 9.8" |
September | 53°F | 76°F | 64°F | 6.2" |
October | 42°F | 64°F | 52°F | 6.1" |
November | 30°F | 50°F | 39°F | 4.3" |
December | 19°F | 34°F | 26°F | 4.0" |
Index | Princeton | Iowa | National |
Air quality index | 42 | 39 | 50 |
Pollution index | 1,753,590 | 1,643,836 | 5,066,862 |
Measurement | Total |
Days measured | 364 |
Days with good air quality | 268 |
Days with moderate air quality | 96 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.010% |
Benzene | 0.070% |
Carbon Tetrachloride | 0.000% |
Lead | 0.010% |
Mercury | 0.001% |
City, State | Population | Air Quality Index | National Avg. |
Camanche, IA | 4,368 | 42 | 16% |
DeWitt, IA | 5,264 | 42 | 16% |
Erie, IL | 1,545 | 42 | 16% |
Hillsdale, IL | 557 | 42 | 16% |
Low Moor, IA | 249 | 42 | 16% |
Princeton, IA | 1,100 | 42 | 16% |
City, State | Population | Air Quality Index | National Avg. |
Hagerman, ID | 1,100 | 20 | 60% |
Rockwell, IA | 1,100 | 15 | 70% |
Cleary, MS | 1,100 | 44 | 12% |
Marion, WI | 1,101 | 37 | 26% |
Washington Mills, NY | 1,101 | 27 | 46% |
Princeton, IA | 1,100 | 42 | 16% |