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Weather & Climate in Bronson, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Bronson experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 19°F in January while summers reach 75°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 30.3 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 1,105 feet.
Temperature
19°F Jan (-7°C)
75°F Jul (24°C)
| Annual Average | 48.0°F |
| 11% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,105 ft (337 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 863/sq mi |
| Coordinates | 42.4090°N, 96.2105°W |
| Timezone | America/Chicago |
| County | Woodbury County County |
| Nearest Airport | Sioux Gateway/Brig General Bud Day Field (SUX) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 83.3 / 100 |
| Social Vulnerability | 39.4 / 100 |
| Community Resilience | 87.8 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Feb 6, 1996 | 1 km N of Wausa, Nebraska | M3.6 | 110 km | 5 km |
| Aug 9, 1997 | 9 km NW of Clarkson, Nebraska | M3.4 | 106 km | 5 km |
| Feb 5, 2025 | 8 km SSE of Tilden, Nebraska | M2.7 | 140 km | 5 km |
| Jun 30, 2021 | 4 km E of Rembrandt, Iowa | M2.7 | 102 km | 10 km |
| Mar 6, 2024 | 6 km SSE of Santee, Nebraska | M2.5 | 138 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
575 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 14 fatalities, 239 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 16, 2014 | EF4 | 92 km | 23.9 mi | 1 |
| Jun 16, 2014 | EF4 | 84 km | 11.5 mi | 1 |
| Jun 16, 2014 | EF4 | 63 km | 15.8 mi | 0 |
| Oct 4, 2013 | EF4 | 78 km | 18.3 mi | 0 |
| Oct 4, 2013 | EF4 | 12 km | 24.7 mi | 0 |
| Jun 23, 2003 | EF4 | 92 km | 13.0 mi | 1 |
| Jul 28, 1986 | EF4 | 69 km | 52.5 mi | 0 |
| Jul 7, 1977 | EF4 | 50 km | 22.6 mi | 0 |
| Jun 23, 1952 | EF4 | 48 km | 24.1 mi | 0 |
| Jul 15, 1950 | EF4 | 75 km | 10.0 mi | 0 |
| Jun 17, 2014 | EF3 | 87 km | 4.0 mi | 0 |
| Apr 9, 2011 | EF3 | 42 km | 3.4 mi | 0 |
| Apr 9, 2011 | EF3 | 76 km | 10.1 mi | 0 |
| Apr 9, 2011 | EF3 | 90 km | 29.4 mi | 0 |
| Jun 11, 2008 | EF3 | 68 km | 14.2 mi | 4 |
| May 16, 1999 | EF3 | 90 km | 6.2 mi | 0 |
| May 16, 1999 | EF3 | 94 km | 7.5 mi | 2 |
| Jul 5, 1994 | EF3 | 12 km | 1.8 mi | 0 |
| Jun 16, 1992 | EF3 | 91 km | 26.0 mi | 0 |
| May 27, 1991 | EF3 | 63 km | 6.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 0.6 in | Coldest, Driest |
| February | 25°F (-4°C) | 0.6 in | |
| March | 36°F (2°C) | 2.0 in | |
| April | 50°F (10°C) | 2.7 in | |
| May | 61°F (16°C) | 3.8 in | |
| June | 71°F (22°C) | 3.9 in | Wettest |
| July | 75°F (24°C) | 3.3 in | Warmest |
| August | 72°F (22°C) | 3.0 in | |
| September | 64°F (18°C) | 2.8 in | |
| October | 51°F (11°C) | 2.1 in | |
| November | 35°F (2°C) | 1.3 in | |
| December | 23°F (-5°C) | 0.8 in |
Bronson has a seasonal temperature swing of 55°F / from 19°F in January to 75°F in July. Total annual precipitation is 27.0 inches, with June being the wettest month (3.9") and January the driest (0.6").