Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 8°F | 28°F | 18°F | 1.0" |
February | 9°F | 30°F | 20°F | 0.6" |
March | 24°F | 46°F | 34°F | 1.5" |
April | 34°F | 59°F | 46°F | 3.7" |
May | 44°F | 71°F | 57°F | 4.5" |
June | 54°F | 80°F | 67°F | 5.6" |
July | 57°F | 84°F | 71°F | 6.2" |
August | 56°F | 81°F | 68°F | 4.8" |
September | 48°F | 74°F | 60°F | 5.4" |
October | 37°F | 61°F | 48°F | 3.4" |
November | 27°F | 46°F | 36°F | 1.5" |
December | 14°F | 32°F | 23°F | 2.3" |
Index | Ontario | Wisconsin | National |
Air quality index | 35 | 69 | 42 |
Pollution index | 2,073,170 | 2,842,418 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 310 |
Days with moderate air quality | 55 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.030% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.001% |
Lead | 0.010% |
Mercury | 0.040% |
City | Population | Air Quality Index | National Avg. |
Melvina, WI | 80 | 35 | 30.0% |
Viroqua, WI | 4,472 | 35 | 30.0% |
Yuba, WI | 30 | 35 | 30.0% |
Cashton, WI | 961 | 35 | 30.0% |
Norwalk, WI | 713 | 35 | 30.0% |
Ontario, WI | 477 | 35 | 30.0% |
City | Population | Air Quality Index | National Avg. |
Verndale, MN | 477 | 29 | 42.0% |
Burlington Junction, MO | 477 | 43 | 14.0% |
Oak Grove Village, MO | 477 | 54 | 8.0% |
Morven, NC | 477 | 40 | 20.0% |
Hildreth, NE | 477 | 19 | 62.0% |
Ontario, WI | 477 | 35 | 30.0% |