| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 32°F | 24°F | 1.7" |
| February | 17°F | 34°F | 25°F | 1.7" |
| March | 27°F | 46°F | 36°F | 2.5" |
| April | 37°F | 58°F | 46°F | 4.3" |
| May | 46°F | 69°F | 57°F | 3.5" |
| June | 57°F | 79°F | 67°F | 5.0" |
| July | 63°F | 84°F | 73°F | 3.7" |
| August | 63°F | 82°F | 72°F | 3.2" |
| September | 55°F | 75°F | 65°F | 2.9" |
| October | 44°F | 63°F | 53°F | 3.2" |
| November | 32°F | 51°F | 41°F | 2.4" |
| December | 21°F | 37°F | 28°F | 2.6" |
| Index | Williamsburg | Milwaukee | Wisconsin |
| Air quality index | 44 | 44 | 69 |
| Pollution index | 17,168,000 | 17,168,000 | 2,842,418 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 254 |
| Days with moderate air quality | 108 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.160% |
| Carbon Tetrachloride | 0.050% |
| Lead | 0.160% |
| Mercury | 0.150% |
| City | Population | Air Quality Index | National Avg. |
| Oak Creek, WI | 36,321 | 39 | 22.0% |
| Germantown, WI | 20,142 | 44 | 12.0% |
| St. Francis, WI | 9,600 | 44 | 12.0% |
| Elm Grove, WI | 6,156 | 44 | 12.0% |
| Fox Point, WI | 6,623 | 44 | 12.0% |
| Milwaukee, WI | 592,649 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Baltimore, MD | 602,274 | 46 | 8.0% |
| Louisville, KY | 618,733 | 49 | 2.0% |
| Albuquerque, NM | 560,447 | 53 | 6.0% |
| Surrey, BC | 560,150 | n/a | |
| Québec, QC | 548,244 | n/a | |
| Milwaukee, WI | 592,649 | 44 | 12.0% |
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