Weather & Climate in Arco, MN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Arco has a cool climate with an average annual temperature of 43°F (6°C). Winters average 12°F in January while summers reach 70°F in July. Annual precipitation totals 29.9 inches (drier than the 38-inch national average). The area receives 42.0 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 1,663 feet.
Temperature
12°F Jan (-11°C)
70°F Jul (21°C)
| Annual Average | 42.5°F |
| 21% below US avg | |
| January Average | 12°F (-11°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 1,663 ft (507 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 210/sq mi |
| Coordinates | 44.3847°N, 96.1839°W |
| Timezone | America/Chicago |
| County | Lincoln County County |
| Nearest Airport | Southwest Minnesota Regional Marshall/Ryan Field (MML) 18 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 18.2 / 100 |
| Social Vulnerability | 34.5 / 100 |
| Community Resilience | 72.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| Jun 5, 1993 | 11 km N of Johnson, Minnesota | M4.1 | 144 km | 10 km |
| Feb 9, 1994 | 6 km NNE of Blomkest, Minnesota | M3.1 | 116 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
420 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 14 fatalities, 303 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 16, 1992 | EF5 | 66 km | 16.0 mi | 1 |
| Jun 13, 1968 | EF5 | 42 km | 9.1 mi | 9 |
| Jul 25, 2000 | EF4 | 70 km | 9.0 mi | 1 |
| Mar 29, 1998 | EF4 | 71 km | 73.5 mi | 1 |
| Jun 7, 1993 | EF4 | 95 km | 54.0 mi | 0 |
| Jun 16, 1992 | EF4 | 53 km | 7.0 mi | 0 |
| Jul 7, 1955 | EF4 | 11 km | 30.0 mi | 1 |
| May 30, 2022 | EF3 | 68 km | 13.3 mi | 0 |
| May 17, 1996 | EF3 | 94 km | 18.0 mi | 0 |
| Jun 7, 1993 | EF3 | 76 km | 6.0 mi | 0 |
| Jun 7, 1993 | EF3 | 84 km | 6.0 mi | 0 |
| Jun 16, 1992 | EF3 | 51 km | 16.0 mi | 0 |
| Jun 16, 1992 | EF3 | 53 km | 2.5 mi | 0 |
| Jun 16, 1992 | EF3 | 65 km | 13.0 mi | 0 |
| Jun 16, 1992 | EF3 | 51 km | 6.0 mi | 0 |
| Jun 16, 1992 | EF3 | 79 km | 4.0 mi | 0 |
| Jun 16, 1992 | EF3 | 43 km | 12.0 mi | 0 |
| Apr 20, 1985 | EF3 | 54 km | 8.0 mi | 0 |
| Jul 18, 1983 | EF3 | 97 km | 0.5 mi | 0 |
| Jun 15, 1970 | EF3 | 66 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
17 wildfires (100+ acres) recorded within 100 km. Largest: LOUISBURGRADE (6,487 acres, 2004).
| Year | Name | Acres Burned | Distance |
| 2004 | LOUISBURGRADE | 6,487 | 93 km |
| 2003 | CHIPPEWA PRAIRIE | 2,067 | 86 km |
| 2004 | FISH FIRE | 1,799 | 93 km |
| 2005 | GRAND MEWS | 1,245 | 96 km |
| 1998 | LEE | 1,137 | 96 km |
| 1995 | UNNAMED | 1,115 | 96 km |
| 2003 | ANDERSON | 1,082 | 93 km |
| 1998 | ANDREASEN | 1,001 | 95 km |
| 1990 | ANDERSON | 988 | 96 km |
| 2007 | ANDERSON | 797 | 93 km |
| 2006 | ANDERSON | 764 | 97 km |
| 1986 | ANDERSON | 746 | 93 km |
| 2000 | FISH | 720 | 95 km |
| 2007 | LEE | 689 | 95 km |
| 2003 | LEE | 560 | 96 km |
| 1993 | LEE | 516 | 96 km |
| 1995 | ANDREASON | 507 | 93 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 12°F (-11°C) | 0.7 in | Coldest, Driest |
| February | 16°F (-9°C) | 0.8 in | |
| March | 28°F (-2°C) | 1.5 in | |
| April | 42°F (6°C) | 3.2 in | |
| May | 55°F (13°C) | 3.7 in | |
| June | 65°F (18°C) | 5.0 in | Wettest |
| July | 70°F (21°C) | 3.5 in | Warmest |
| August | 68°F (20°C) | 3.6 in | |
| September | 60°F (15°C) | 3.3 in | |
| October | 46°F (8°C) | 2.3 in | |
| November | 31°F (-1°C) | 1.3 in | |
| December | 18°F (-8°C) | 0.9 in |
Arco has a seasonal temperature swing of 58°F / from 12°F in January to 70°F in July. Total annual precipitation is 29.9 inches, with June being the wettest month (5.0") and January the driest (0.7").