Weather & Climate in Mount Calvary, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mount Calvary experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 19°F in January while summers reach 71°F in July. Annual precipitation totals 28.4 inches (drier than the 38-inch national average). The area receives 38.0 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 38. 93% of days have good air quality. The city sits at an elevation of 919 feet.
Temperature
19°F Jan (-7°C)
71°F Jul (22°C)
| Annual Average | 46.5°F |
| 14% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 919 ft (280 m) |
| Area | 1.1 sq mi (2.7 km²) |
| Population Density | 659/sq mi |
| Coordinates | 43.8238°N, 88.2411°W |
| Timezone | America/Chicago |
| County | Fond du Lac County County |
| Nearest Airport | Wittman Regional (OSH) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
| Good Days % | 92.7% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 76.3 / 100 |
| Social Vulnerability | 16.6 / 100 |
| Community Resilience | 94.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.9.
| Aug 2, 2024 | 38 km ESE of Sturgeon Bay, Wisconsin | M2.9 | 141 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
427 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 18 fatalities, 494 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 18, 1996 | EF5 | 33 km | 13.3 mi | 0 |
| Jul 5, 1994 | EF4 | 61 km | 3.5 mi | 0 |
| Apr 27, 1984 | EF4 | 94 km | 6.5 mi | 1 |
| Apr 27, 1984 | EF4 | 50 km | 27.5 mi | 1 |
| Apr 4, 1981 | EF4 | 44 km | 1.8 mi | 3 |
| Apr 21, 1974 | EF4 | 48 km | 26.0 mi | 0 |
| Aug 22, 1964 | EF4 | 56 km | 2.2 mi | 0 |
| Apr 3, 1956 | EF4 | 60 km | 11.5 mi | 7 |
| Sep 26, 1951 | EF4 | 90 km | 9.0 mi | 1 |
| Jun 23, 2004 | EF3 | 64 km | 33.3 mi | 0 |
| Jun 23, 2004 | EF3 | 60 km | 7.6 mi | 1 |
| Jun 8, 1984 | EF3 | 90 km | 29.0 mi | 0 |
| Apr 27, 1984 | EF3 | 95 km | 32.0 mi | 0 |
| Jun 5, 1980 | EF3 | 88 km | 10.7 mi | 0 |
| Apr 7, 1980 | EF3 | 70 km | 1.2 mi | 0 |
| Jun 5, 1977 | EF3 | 39 km | 69.5 mi | 0 |
| Apr 21, 1974 | EF3 | 51 km | 22.2 mi | 0 |
| Apr 21, 1974 | EF3 | 55 km | 58.6 mi | 2 |
| Dec 1, 1970 | EF3 | 65 km | 13.1 mi | 0 |
| Jun 26, 1969 | EF3 | 76 km | 15.3 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
6 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (1,524 acres, 2006).
| Year | Name | Acres Burned | Distance |
| 2006 | UNNAMED | 1,524 | 45 km |
| 2010 | RX BURN | 1,236 | 45 km |
| 1994 | SOMMERS | 938 | 45 km |
| 1988 | PEACHY RD | 812 | 47 km |
| 2006 | UNNAMED | 612 | 45 km |
| 2007 | TOWER RD 2 | 592 | 47 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 0.7 in | Coldest |
| February | 22°F (-6°C) | 0.7 in | Driest |
| March | 33°F (1°C) | 1.7 in | |
| April | 45°F (7°C) | 2.8 in | |
| May | 57°F (14°C) | 3.3 in | |
| June | 67°F (20°C) | 4.1 in | Wettest |
| July | 71°F (22°C) | 3.4 in | Warmest |
| August | 69°F (21°C) | 3.5 in | |
| September | 62°F (17°C) | 2.9 in | |
| October | 50°F (10°C) | 2.5 in | |
| November | 37°F (3°C) | 1.8 in | |
| December | 25°F (-4°C) | 0.9 in |
Mount Calvary has a seasonal temperature swing of 52°F / from 19°F in January to 71°F in July. Total annual precipitation is 28.4 inches, with June being the wettest month (4.1") and February the driest (0.7").