Weather & Climate in Otranto, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Otranto has a cool climate with an average annual temperature of 43°F (6°C). Winters average 13°F in January while summers reach 69°F in July. Annual precipitation totals 38.4 inches. The area receives 47.7 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 1,168 feet.
Temperature
13°F Jan (-11°C)
69°F Jul (21°C)
| Annual Average | 43.0°F |
| 20% below US avg | |
| January Average | 13°F (-11°C) |
| July Average | 69°F (21°C) |
Geography
| Elevation | 1,168 ft (356 m) |
| Area | 0.4 sq mi (1.1 km²) |
| Population Density | 83/sq mi |
| Coordinates | 43.4609°N, 92.9863°W |
| Timezone | America/Chicago |
| County | Mitchell County County |
| Nearest Airport | Northeast Iowa Regional (CCY) 33 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 37.7 / 100 |
| Social Vulnerability | 17.5 / 100 |
| Community Resilience | 85.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | No Rating |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | 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: M2.8.
| Apr 25, 2017 | Near Mankato, Minnesota | M2.8 | 115 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
592 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 41 fatalities, 910 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 15, 1968 | EF5 | 78 km | 62.1 mi | 13 |
| Oct 14, 1966 | EF5 | 91 km | 9.7 mi | 6 |
| Jun 17, 2010 | EF4 | 54 km | 16.9 mi | 1 |
| Jul 12, 1971 | EF4 | 50 km | 10.9 mi | 0 |
| Apr 30, 1967 | EF4 | 38 km | 38.7 mi | 5 |
| Apr 30, 1967 | EF4 | 15 km | 7.6 mi | 0 |
| Apr 30, 1967 | EF4 | 23 km | 13.3 mi | 0 |
| Apr 30, 1967 | EF4 | 57 km | 20.1 mi | 6 |
| May 5, 1965 | EF4 | 24 km | 41.6 mi | 0 |
| Sep 16, 1962 | EF4 | 71 km | 0.5 mi | 0 |
| Sep 1, 1961 | EF4 | 76 km | 26.6 mi | 0 |
| May 10, 1953 | EF4 | 61 km | 26.6 mi | 0 |
| May 10, 1953 | EF4 | 47 km | 162.0 mi | 2 |
| Jun 12, 2013 | EF3 | 86 km | 6.2 mi | 0 |
| Jun 17, 2010 | EF3 | 46 km | 4.3 mi | 0 |
| Jun 17, 2010 | EF3 | 39 km | 5.0 mi | 0 |
| Jun 17, 2010 | EF3 | 44 km | 18.2 mi | 0 |
| Jun 11, 2004 | EF3 | 36 km | 12.0 mi | 0 |
| Jul 19, 1994 | EF3 | 62 km | 23.0 mi | 0 |
| Jun 18, 1994 | EF3 | 65 km | 6.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: SNAKE TRAIL (1,496 acres, 2024).
| Year | Name | Acres Burned | Distance |
| 2024 | SNAKE TRAIL | 1,496 | 81 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 13°F (-11°C) | 1.1 in | Coldest, Driest |
| February | 17°F (-8°C) | 1.2 in | |
| March | 30°F (-1°C) | 2.1 in | |
| April | 43°F (6°C) | 4.1 in | |
| May | 56°F (13°C) | 5.5 in | |
| June | 66°F (19°C) | 5.8 in | Wettest |
| July | 69°F (21°C) | 4.3 in | Warmest |
| August | 67°F (19°C) | 4.0 in | |
| September | 59°F (15°C) | 3.7 in | |
| October | 46°F (8°C) | 3.2 in | |
| November | 32°F (-0°C) | 2.0 in | |
| December | 19°F (-7°C) | 1.5 in |
Otranto has a seasonal temperature swing of 56°F / from 13°F in January to 69°F in July. Total annual precipitation is 38.4 inches, with June being the wettest month (5.8") and January the driest (1.1").