Cromwell, IA

Full City Profile · Iowa · Union County County

3.1 /5.0

B Good

87 Population 290/sq mi density

$57,500 Median Income $30,105 per capita

$107,100 Home Value $148,825 Zillow

49°F Avg Temperature 275 sunny days/yr

266 Violent Crime/100K 1,872 property/100K

Overall

3.1 / 5.0

Good overall score based on economy, affordability, safety and education

Economy

4.2 / 5.0

$57,500 median income, 0.0% unemployment

A+

Affordability

5.0 / 5.0

$107,100 home value, /mo rent

Safety

1.0 / 5.0

266 violent crimes/100K

Education

2.2 / 5.0

14.8% bachelor's degree or higher

Cromwell experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 21°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.9 inches. Air quality is rated Good with a median AQI of 43.

Temperature

21°F Jan (-6°C) 74°F Jul (23°C)

Annual Average	48.8°F
	10% below US avg
January Average	21°F (-6°C)
July Average	74°F (23°C)
Sunny Days	275 days/yr

Geography

Elevation	1,279 ft (390 m)
Area	0.3 sq mi (0.8 km²)
Population Density	290/sq mi
Coordinates	41.0405°N, 94.4618°W
Timezone	America/Chicago
County	Union County County
Nearest Airport	Des Moines International (DSM) 51 miles away

Precipitation & Snow

Annual Rainfall 37.9"

0% below US avg

Wettest Month (May) 4.41"

Driest Month (Jan) 0.87"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	49.5 / 100
Social Vulnerability	74.2 / 100
Community Resilience	76.9 / 100

Hazard Breakdown

Tornado	Relatively Low
Hurricane	Very Low
Earthquake	Very Low
Wildfire	Very Low
Flood	Very Low
Hail	Relatively Moderate
Strong Wind	Relatively Moderate
Heat Wave	Relatively Moderate
Winter Weather	Relatively Low
Lightning	Very Low
Ice Storm	Relatively Low
Drought	Relatively High
Cold Wave	Relatively Moderate
Landslide	Relatively Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

4 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.6. Most recent: M3.6 on Dec 17, 2009.

Dec 17, 2009	2 km NW of Auburn, Nebraska	M3.6	138 km
Jul 16, 2004	6 km SSE of Riverton, Iowa	M3.5	102 km
Feb 11, 1995	6 km E of Clearmont, Missouri	M3.1	73 km
Mar 31, 1993	2 km SE of Nemaha, Nebraska	M2.9	128 km

Source: USGS (M2.5+, 1990–2025)

Tornado History

621 tornadoes (EF0+) within 100 km since 1950. Strongest: EF5. Total: 21 fatalities, 247 injuries.

Date	Rating	Distance	Fatalities
Jun 27, 1953	EF5	50 km	1
May 21, 2024	EF4	42 km	5
Mar 5, 2022	EF4	31 km	6
Apr 8, 1999	EF4	12 km	0
Apr 8, 1999	EF4	43 km	0
May 27, 1995	EF4	5 km	0
May 27, 1995	EF4	84 km	0
May 24, 1989	EF4	23 km	0
Jun 7, 1984	EF4	78 km	3
Jun 2, 1980	EF4	65 km	0
Mar 29, 1979	EF4	85 km	0
Jun 22, 1964	EF4	91 km	0
Apr 12, 1964	EF4	77 km	1
May 10, 1959	EF4	53 km	0
Apr 5, 1954	EF4	95 km	0
May 10, 1953	EF4	97 km	0
May 21, 2024	EF3	65 km	0
Mar 5, 2022	EF3	91 km	1
Aug 20, 2019	EF3	82 km	0
Apr 11, 2001	EF3	74 km	0

Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

1 wildfire (100+ acres) within 100 km. Largest: UNNAMED (4,195 ac, 2005).

Year	Name	Acres	Distance
2005	UNNAMED	4,195	74 km

Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	21°F (-6°C)	0.9 in	Coldest, Driest
February	27°F (-3°C)	1.0 in
March	38°F (3°C)	2.3 in
April	50°F (10°C)	3.4 in
May	61°F (16°C)	4.4 in	Wettest
June	71°F (22°C)	4.4 in
July	74°F (23°C)	4.4 in	Warmest
August	73°F (23°C)	4.0 in
September	64°F (18°C)	4.3 in
October	53°F (11°C)	2.6 in
November	37°F (3°C)	1.9 in
December	25°F (-4°C)	1.1 in

Cromwell has a seasonal temperature swing of 54°F / from 21°F in January to 74°F in July. Total annual precipitation is 34.8 inches, with May being the wettest month (4.4") and January the driest (0.9").

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