| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 28°F | 20°F | 1.2" |
| February | 14°F | 30°F | 22°F | 1.0" |
| March | 25°F | 44°F | 34°F | 2.2" |
| April | 37°F | 58°F | 47°F | 4.0" |
| May | 48°F | 70°F | 58°F | 4.0" |
| June | 58°F | 80°F | 69°F | 5.4" |
| July | 61°F | 83°F | 72°F | 4.1" |
| August | 60°F | 81°F | 70°F | 4.0" |
| September | 52°F | 74°F | 63°F | 3.5" |
| October | 42°F | 61°F | 51°F | 2.9" |
| November | 30°F | 47°F | 38°F | 2.2" |
| December | 18°F | 32°F | 25°F | 1.5" |
| Index | Mount Calvary | Wisconsin | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,468,840 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 202 |
| Days with good air quality | 195 |
| Days with moderate air quality | 7 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Fond du Lac, WI | 44,014 | 36 | 28.0% |
| Brownsville, WI | 713 | 36 | 28.0% |
| Eden, WI | 820 | 36 | 28.0% |
| Greenbush, WI | 198 | 36 | 28.0% |
| North Fond du Lac, WI | 5,236 | 36 | 28.0% |
| Mount Calvary, WI | 623 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Cove City, NC | 623 | 42 | 16.0% |
| Ashley, ND | 623 | 20 | 60.0% |
| Quogue, NY | 623 | 41 | 18.0% |
| Willsboro, NY | 623 | 37 | 26.0% |
| Adams, TN | 623 | 40 | 20.0% |
| Mount Calvary, WI | 623 | 36 | 28.0% |