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Weather & Climate in Danbury, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Danbury experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 18°F in January while summers reach 73°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 32.2 inches. The area receives 31.1 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 1,165 feet.
Temperature
18°F Jan (-8°C)
73°F Jul (23°C)
| Annual Average | 47.2°F |
| 13% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,165 ft (355 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 710/sq mi |
| Coordinates | 42.2364°N, 95.7216°W |
| Timezone | America/Chicago |
| County | Ida County County |
| Nearest Airport | Sioux Gateway/Brig General Bud Day Field (SUX) 36 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 18.4 / 100 |
| Social Vulnerability | 33.0 / 100 |
| Community Resilience | 94.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively 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: M3.4.
| Aug 9, 1997 | 9 km NW of Clarkson, Nebraska | M3.4 | 131 km | 5 km |
| Jun 30, 2021 | 4 km E of Rembrandt, Iowa | M2.7 | 83 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
542 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 9 fatalities, 204 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 16, 2014 | EF4 | 95 km | 15.8 mi | 0 |
| Oct 4, 2013 | EF4 | 34 km | 24.7 mi | 0 |
| Apr 9, 2011 | EF4 | 90 km | 3.2 mi | 0 |
| May 27, 1995 | EF4 | 70 km | 36.0 mi | 0 |
| Jul 7, 1977 | EF4 | 81 km | 22.6 mi | 0 |
| Jun 26, 1976 | EF4 | 88 km | 5.1 mi | 0 |
| Jun 9, 1954 | EF4 | 83 km | 9.9 mi | 1 |
| Jun 23, 1952 | EF4 | 58 km | 24.1 mi | 0 |
| Jul 15, 1950 | EF4 | 87 km | 10.0 mi | 0 |
| Jul 14, 2021 | EF3 | 77 km | 10.8 mi | 0 |
| Apr 9, 2011 | EF3 | 13 km | 3.4 mi | 0 |
| Apr 9, 2011 | EF3 | 38 km | 10.1 mi | 0 |
| Apr 9, 2011 | EF3 | 58 km | 29.4 mi | 0 |
| Jun 11, 2008 | EF3 | 59 km | 14.2 mi | 4 |
| Jun 11, 2004 | EF3 | 93 km | 6.1 mi | 0 |
| May 16, 1999 | EF3 | 72 km | 7.5 mi | 2 |
| May 16, 1999 | EF3 | 69 km | 6.2 mi | 0 |
| Jul 5, 1994 | EF3 | 49 km | 1.8 mi | 0 |
| Jun 16, 1992 | EF3 | 66 km | 26.0 mi | 0 |
| May 27, 1991 | EF3 | 73 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: UNNAMED (629 acres, 2010).
| Year | Name | Acres Burned | Distance |
| 2010 | UNNAMED | 629 | 93 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 0.6 in | Coldest, Driest |
| February | 25°F (-4°C) | 0.8 in | |
| March | 36°F (2°C) | 2.1 in | |
| April | 49°F (10°C) | 2.7 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 71°F (21°C) | 4.3 in | Wettest |
| July | 73°F (23°C) | 3.5 in | Warmest |
| August | 72°F (22°C) | 3.6 in | |
| September | 63°F (17°C) | 3.2 in | |
| October | 51°F (11°C) | 2.3 in | |
| November | 35°F (2°C) | 1.2 in | |
| December | 23°F (-5°C) | 0.9 in |
Danbury has a seasonal temperature swing of 55°F / from 18°F in January to 73°F in July. Total annual precipitation is 29.1 inches, with June being the wettest month (4.3") and January the driest (0.6").