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Weather & Climate in Iona, MN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Iona has a cool climate with an average annual temperature of 43°F (6°C). Winters average 13°F in January while summers reach 71°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 30.1 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. Air quality is rated Good with a median AQI of 36. The city sits at an elevation of 1,631 feet.
Temperature
13°F Jan (-11°C)
71°F Jul (21°C)
| Annual Average | 43.1°F |
| 20% below US avg | |
| January Average | 13°F (-11°C) |
| July Average | 71°F (21°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,631 ft (497 m) |
| Area | 0.6 sq mi (1.4 km²) |
| Population Density | 376/sq mi |
| Coordinates | 43.9156°N, 95.7831°W |
| Timezone | America/Chicago |
| County | Nobles County County |
| Nearest Airport | Southwest Minnesota Regional Marshall/Ryan Field (MML) 37 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 50.2 / 100 |
| Social Vulnerability | 65.0 / 100 |
| Community Resilience | 40.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
3 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 | 136 km | 5 km |
| Apr 25, 2017 | Near Mankato, Minnesota | M2.8 | 145 km | 0 km |
| Jun 30, 2021 | 4 km E of Rembrandt, Iowa | M2.7 | 133 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
514 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 14 fatalities, 333 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 16, 1992 | EF5 | 23 km | 16.0 mi | 1 |
| Jun 13, 1968 | EF5 | 28 km | 9.1 mi | 9 |
| Jun 25, 2010 | EF4 | 55 km | 13.7 mi | 0 |
| Mar 29, 1998 | EF4 | 21 km | 73.5 mi | 1 |
| Jun 7, 1993 | EF4 | 94 km | 54.0 mi | 0 |
| Jun 16, 1992 | EF4 | 10 km | 7.0 mi | 0 |
| Jul 7, 1955 | EF4 | 71 km | 30.0 mi | 1 |
| Aug 1, 2006 | EF3 | 85 km | 1.5 mi | 0 |
| Aug 7, 1994 | EF3 | 50 km | 4.5 mi | 0 |
| Jun 7, 1993 | EF3 | 96 km | 6.0 mi | 0 |
| Jun 7, 1993 | EF3 | 95 km | 6.0 mi | 0 |
| Jun 16, 1992 | EF3 | 21 km | 12.0 mi | 0 |
| Jun 16, 1992 | EF3 | 59 km | 13.0 mi | 0 |
| Jun 16, 1992 | EF3 | 96 km | 6.0 mi | 0 |
| Jun 16, 1992 | EF3 | 39 km | 16.0 mi | 0 |
| Jun 16, 1992 | EF3 | 96 km | 2.5 mi | 0 |
| Apr 20, 1985 | EF3 | 25 km | 8.0 mi | 0 |
| Sep 20, 1980 | EF3 | 99 km | 1.5 mi | 0 |
| Jul 5, 1978 | EF3 | 99 km | 8.0 mi | 0 |
| May 31, 1971 | EF3 | 71 km | 8.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 13°F (-11°C) | 0.6 in | Coldest, Driest |
| February | 19°F (-7°C) | 0.7 in | |
| March | 30°F (-1°C) | 1.9 in | |
| April | 44°F (7°C) | 2.6 in | |
| May | 58°F (14°C) | 3.2 in | |
| June | 67°F (20°C) | 3.9 in | Wettest |
| July | 71°F (21°C) | 3.6 in | Warmest |
| August | 69°F (20°C) | 3.2 in | |
| September | 60°F (16°C) | 3.2 in | |
| October | 48°F (9°C) | 2.1 in | |
| November | 31°F (-0°C) | 1.3 in | |
| December | 18°F (-8°C) | 0.8 in |
Iona has a seasonal temperature swing of 58°F / from 13°F in January to 71°F in July. Total annual precipitation is 26.8 inches, with June being the wettest month (3.9") and January the driest (0.6").