Weather & Climate in St. Nazianz, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Nazianz experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 18°F in January while summers reach 71°F in July. Annual precipitation totals 33.9 inches. The area receives 43.5 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 39. 84% of days have good air quality. The city sits at an elevation of 870 feet.
Temperature
18°F Jan (-8°C)
71°F Jul (22°C)
| Annual Average | 45.7°F |
| 15% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 870 ft (265 m) |
| Area | 0.8 sq mi (2.0 km²) |
| Population Density | 1,115/sq mi |
| Coordinates | 44.0073°N, 87.9248°W |
| Timezone | America/Chicago |
| County | Manitowoc County County |
| Nearest Airport | Wittman Regional (OSH) 34 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
| Good Days % | 84.3% |
| Unhealthy Days | 6 |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 68.9 / 100 |
| Social Vulnerability | 23.0 / 100 |
| Community Resilience | 99.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively High |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | 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 | 108 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
310 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 16 fatalities, 277 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 18, 1996 | EF5 | 65 km | 13.3 mi | 0 |
| Jul 5, 1994 | EF4 | 31 km | 3.5 mi | 0 |
| Apr 27, 1984 | EF4 | 67 km | 27.5 mi | 1 |
| Apr 4, 1981 | EF4 | 68 km | 1.8 mi | 3 |
| Apr 21, 1974 | EF4 | 78 km | 26.0 mi | 0 |
| Aug 22, 1964 | EF4 | 70 km | 2.2 mi | 0 |
| Apr 3, 1956 | EF4 | 84 km | 11.5 mi | 7 |
| Jun 23, 2004 | EF3 | 94 km | 33.3 mi | 0 |
| Jun 23, 2004 | EF3 | 90 km | 7.6 mi | 1 |
| Apr 27, 1984 | EF3 | 98 km | 32.0 mi | 0 |
| Jun 5, 1977 | EF3 | 68 km | 69.5 mi | 0 |
| Apr 21, 1974 | EF3 | 84 km | 22.2 mi | 0 |
| Apr 21, 1974 | EF3 | 87 km | 58.6 mi | 2 |
| Dec 1, 1970 | EF3 | 68 km | 13.1 mi | 0 |
| Jun 26, 1969 | EF3 | 67 km | 15.3 mi | 0 |
| Jun 25, 1950 | EF3 | 82 km | 0.1 mi | 0 |
| Aug 28, 2018 | EF2 | 65 km | 3.9 mi | 0 |
| Aug 6, 2013 | EF2 | 80 km | 13.1 mi | 0 |
| Apr 10, 2011 | EF2 | 40 km | 1.5 mi | 0 |
| Jun 1, 2000 | EF2 | 88 km | 17.0 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 | 78 km |
| 2010 | RX BURN | 1,236 | 77 km |
| 1994 | SOMMERS | 938 | 78 km |
| 1988 | PEACHY RD | 812 | 80 km |
| 2006 | UNNAMED | 612 | 77 km |
| 2007 | TOWER RD 2 | 592 | 80 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 1.5 in | Coldest |
| February | 21°F (-6°C) | 1.3 in | Driest |
| March | 32°F (-0°C) | 1.9 in | |
| April | 44°F (7°C) | 3.1 in | |
| May | 56°F (14°C) | 3.8 in | |
| June | 67°F (19°C) | 4.7 in | Wettest |
| July | 71°F (22°C) | 3.9 in | Warmest |
| August | 69°F (21°C) | 3.6 in | |
| September | 62°F (16°C) | 3.3 in | |
| October | 49°F (9°C) | 3.0 in | |
| November | 36°F (2°C) | 2.1 in | |
| December | 24°F (-4°C) | 1.7 in |
St. Nazianz has a seasonal temperature swing of 53°F / from 18°F in January to 71°F in July. Total annual precipitation is 33.9 inches, with June being the wettest month (4.7") and February the driest (1.3").