Weather & Climate in Walnut Grove, MN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Walnut Grove has a cool climate with an average annual temperature of 44°F (7°C). Winters average 14°F in January while summers reach 72°F in July. Annual precipitation totals 29.3 inches (drier than the 38-inch national average). The area receives 46.3 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 1,208 feet.
Temperature
14°F Jan (-10°C)
72°F Jul (22°C)
| Annual Average | 44.4°F |
| 18% below US avg | |
| January Average | 14°F (-10°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 1,208 ft (368 m) |
| Area | 1.1 sq mi (2.8 km²) |
| Population Density | 660/sq mi |
| Coordinates | 44.2250°N, 95.4692°W |
| Timezone | America/Chicago |
| County | Redwood County County |
| Nearest Airport | Southwest Minnesota Regional Marshall/Ryan Field (MML) 24 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 35.1 / 100 |
| Social Vulnerability | 36.8 / 100 |
| Community Resilience | 92.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| 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: M3.1.
| Feb 9, 1994 | 6 km NNE of Blomkest, Minnesota | M3.1 | 94 km | 5 km |
| Apr 25, 2017 | Near Mankato, Minnesota | M2.8 | 117 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
417 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 15 fatalities, 367 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 16, 1992 | EF5 | 65 km | 16.0 mi | 1 |
| Jun 13, 1968 | EF5 | 23 km | 9.1 mi | 9 |
| Jun 25, 2010 | EF4 | 96 km | 13.7 mi | 0 |
| Jul 25, 2000 | EF4 | 77 km | 9.0 mi | 1 |
| Mar 29, 1998 | EF4 | 31 km | 73.5 mi | 1 |
| Jun 16, 1992 | EF4 | 46 km | 7.0 mi | 0 |
| Jul 7, 1955 | EF4 | 65 km | 30.0 mi | 1 |
| Jul 11, 2008 | EF3 | 98 km | 8.0 mi | 0 |
| Aug 24, 2006 | EF3 | 96 km | 33.0 mi | 1 |
| Aug 1, 2006 | EF3 | 70 km | 1.5 mi | 0 |
| Aug 7, 1994 | EF3 | 89 km | 4.5 mi | 0 |
| Jun 16, 1992 | EF3 | 69 km | 6.0 mi | 0 |
| Jun 16, 1992 | EF3 | 31 km | 12.0 mi | 0 |
| Jun 16, 1992 | EF3 | 9 km | 16.0 mi | 0 |
| Jun 16, 1992 | EF3 | 16 km | 13.0 mi | 0 |
| Jun 16, 1992 | EF3 | 67 km | 2.5 mi | 0 |
| Apr 20, 1985 | EF3 | 62 km | 8.0 mi | 0 |
| May 31, 1971 | EF3 | 100 km | 8.6 mi | 0 |
| May 31, 1971 | EF3 | 96 km | 8.0 mi | 0 |
| May 12, 2022 | EF2 | 99 km | 0.4 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: LINCOLN WPA RX (575 acres, 2024).
| Year | Name | Acres Burned | Distance |
| 2024 | LINCOLN WPA RX | 575 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 14°F (-10°C) | 0.5 in | Coldest, Driest |
| February | 18°F (-8°C) | 0.7 in | |
| March | 30°F (-1°C) | 1.5 in | |
| April | 44°F (7°C) | 2.9 in | |
| May | 57°F (14°C) | 4.0 in | |
| June | 68°F (20°C) | 4.6 in | Wettest |
| July | 72°F (22°C) | 3.8 in | Warmest |
| August | 69°F (20°C) | 3.6 in | |
| September | 61°F (16°C) | 3.5 in | |
| October | 47°F (9°C) | 2.3 in | |
| November | 33°F (0°C) | 1.3 in | |
| December | 20°F (-7°C) | 0.8 in |
Walnut Grove has a seasonal temperature swing of 58°F / from 14°F in January to 72°F in July. Total annual precipitation is 29.3 inches, with June being the wettest month (4.6") and January the driest (0.5").