| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | n/a°F | n/a°F | n/a°F | n/a |
| February | n/a°F | n/a°F | n/a°F | n/a |
| March | n/a°F | n/a°F | n/a°F | n/a |
| April | n/a°F | n/a°F | n/a°F | n/a |
| May | n/a°F | n/a°F | n/a°F | n/a |
| June | n/a°F | n/a°F | n/a°F | n/a |
| July | n/a°F | n/a°F | n/a°F | n/a |
| August | n/a°F | n/a°F | n/a°F | n/a |
| September | n/a°F | n/a°F | n/a°F | n/a |
| October | n/a°F | n/a°F | n/a°F | n/a |
| November | n/a°F | n/a°F | n/a°F | n/a |
| December | n/a°F | n/a°F | n/a°F | n/a |
| Index | Niagara-on-the-Lake | Ontario | National |
| Air quality index | n/a | n/a | 42 |
| Pollution index | n/a | n/a | 2,726,193 |
| Measurement | Total |
| Days measured | |
| Days with good air quality | |
| Days with moderate air quality | |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | n/a% |
| Benzene | n/a% |
| Carbon Tetrachloride | n/a% |
| Lead | n/a% |
| Mercury | n/a% |
| City | Population | Air Quality Index | National Avg. |
| Lewiston, NY | 2,582 | 39 | 22.0% |
| Tonawanda city, NY | 14,991 | 39 | 22.0% |
| Youngstown, NY | 1,687 | 39 | 22.0% |
| Niagara Falls, NY | 47,978 | 39 | 22.0% |
| Tonawanda, NY | 14,790 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Rocky River, OH | 20,115 | 50 | = 100 |
| Dixon, CA | 20,106 | 52 | 4.0% |
| Sulphur, LA | 20,122 | 45 | 10.0% |
| Pittsburg, KS | 20,096 | 37 | 26.0% |
| Portsmouth, OH | 20,094 | 14 | 72.0% |
| Niagara-on-the-Lake, ON | 20,111 | n/a |