Weather & Climate in Superior, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Superior has a cool climate with an average annual temperature of 41°F (5°C). Winters average 14°F in January while summers reach 67°F in July. Annual precipitation totals 31.4 inches. The area receives 56.0 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 662 feet.
Temperature
14°F Jan (-10°C)
67°F Jul (20°C)
| Annual Average | 41.4°F |
| 23% below US avg | |
| January Average | 14°F (-10°C) |
| July Average | 67°F (20°C) |
Geography
| Elevation | 662 ft (202 m) |
| Area | 55.3 sq mi (143.3 km²) |
| Population Density | 18/sq mi |
| Coordinates | 46.6921°N, 92.0804°W |
| Timezone | America/Chicago |
| County | Carlton County County |
| Nearest Airport | Duluth International (DLH) 12 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 70.1 / 100 |
| Social Vulnerability | 27.5 / 100 |
| Community Resilience | 90.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
67 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 2 fatalities, 30 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 6, 1969 | EF3 | 40 km | 17.2 mi | 2 |
| Aug 6, 1969 | EF3 | 74 km | 18.4 mi | 0 |
| Jun 30, 1968 | EF3 | 94 km | 0.1 mi | 0 |
| Jul 1, 2011 | EF2 | 45 km | 2.9 mi | 0 |
| Sep 3, 1980 | EF2 | 20 km | 9.9 mi | 0 |
| Jul 7, 1970 | EF2 | 63 km | 22.3 mi | 0 |
| Jun 30, 1968 | EF2 | 54 km | 39.0 mi | 0 |
| Sep 19, 2024 | EF1 | 54 km | 5.9 mi | 0 |
| Jul 11, 2022 | EF1 | 45 km | 4.6 mi | 0 |
| May 30, 2022 | EF1 | 100 km | 3.3 mi | 0 |
| Aug 14, 2020 | EF1 | 86 km | 1.5 mi | 0 |
| Aug 14, 2020 | EF1 | 66 km | 2.7 mi | 0 |
| Jul 18, 2020 | EF1 | 33 km | 0.4 mi | 0 |
| Jul 18, 2020 | EF1 | 94 km | 0.6 mi | 0 |
| Jul 18, 2019 | EF1 | 56 km | 1.3 mi | 0 |
| Jun 19, 2016 | EF1 | 81 km | 7.2 mi | 0 |
| Jun 19, 2016 | EF1 | 96 km | 8.1 mi | 0 |
| Jun 11, 2005 | EF1 | 95 km | 6.0 mi | 0 |
| Jun 27, 1994 | EF1 | 55 km | 1.0 mi | 0 |
| Jun 27, 1994 | EF1 | 53 km | 4.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: GERMANN ROAD FIRE (6,751 acres, 2013).
| Year | Name | Acres Burned | Distance |
| 2013 | GERMANN ROAD FIRE | 6,751 | 54 km |
| 2019 | NW SANDS UNITS I/F/C/A | 3,386 | 62 km |
| 2003 | UNNAMED | 2,998 | 95 km |
| 2015 | TAMARACK | 2,745 | 88 km |
| 2016 | UNNAMED | 2,682 | 61 km |
| 1987 | UNNAMED | 2,512 | 94 km |
| 2013 | UNNAMED | 2,240 | 62 km |
| 2024 | RX-86_FY23 | 2,187 | 98 km |
| 2014 | UNNAMED | 2,116 | 65 km |
| 2015 | UNNAMED | 1,407 | 64 km |
| 2004 | SOUTH MAIN ROAD | 1,384 | 99 km |
| 2006 | WUI RX BURN UNIT 15 | 1,380 | 98 km |
| 2015 | UNNAMED | 1,361 | 60 km |
| 2021 | NW SANDS - BLOCK E RX | 1,361 | 64 km |
| 1987 | UNNAMED | 1,352 | 80 km |
| 2000 | S MAIN RO | 1,181 | 97 km |
| 1987 | UNNAMED | 1,096 | 99 km |
| 2007 | PIONEER FIRE | 1,072 | 86 km |
| 1999 | UNNAMED | 1,002 | 97 km |
| 2018 | UNNAMED | 961 | 61 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 14°F (-10°C) | 0.8 in | Coldest, Driest |
| February | 18°F (-8°C) | 0.9 in | |
| March | 29°F (-2°C) | 1.4 in | |
| April | 39°F (4°C) | 2.6 in | |
| May | 49°F (10°C) | 3.4 in | |
| June | 58°F (15°C) | 4.6 in | Wettest |
| July | 67°F (20°C) | 3.9 in | Warmest |
| August | 66°F (19°C) | 3.9 in | |
| September | 58°F (15°C) | 3.4 in | |
| October | 46°F (8°C) | 3.2 in | |
| November | 32°F (0°C) | 2.1 in | |
| December | 20°F (-7°C) | 1.3 in |
Superior has a seasonal temperature swing of 53°F / from 14°F in January to 67°F in July. Total annual precipitation is 31.5 inches, with June being the wettest month (4.6") and January the driest (0.8").