Diagonal, IA

Full City Profile · Iowa · Ringgold County County

3.2 /5.0

B Good

481 Population 529/sq mi density

$80,417 Median Income $21,470 per capita

$84,400 Home Value $130,916 Zillow

$838 Median Rent 25.5% income on rent

50°F Avg Temperature 275 sunny days/yr

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

Overall

3.2 / 5.0

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

A+

Economy

4.5 / 5.0

$80,417 median income, 2.7% unemployment

A+

Affordability

5.0 / 5.0

$84,400 home value, $838/mo rent

Safety

1.0 / 5.0

266 violent crimes/100K

Education

2.3 / 5.0

15.9% bachelor's degree or higher

Diagonal experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.0 inches. The area receives 20.5 inches of snow annually. Air quality is rated Good with a median AQI of 43.

Temperature

22°F Jan (-6°C) 74°F Jul (23°C)

Annual Average	49.6°F
	8% below US avg
January Average	22°F (-6°C)
July Average	74°F (23°C)
Sunny Days	275 days/yr

Geography

Elevation	1,178 ft (359 m)
Area	0.9 sq mi (2.4 km²)
Population Density	529/sq mi
Coordinates	40.8109°N, 94.3419°W
Timezone	America/Chicago
County	Ringgold County County
Nearest Airport	Des Moines International (DSM) 58 miles away

Precipitation & Snow

Annual Rainfall 37.0"

3% below US avg

Snowfall 20.5"

Wettest Month (Jul) 4.41"

Driest Month (Jan) 0.83"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	14.2 / 100
Social Vulnerability	10.6 / 100
Community Resilience	47.6 / 100

Hazard Breakdown

Tornado	Relatively Low
Hurricane	Very Low
Earthquake	Very Low
Wildfire	Very Low
Flood	Very Low
Hail	Relatively Low
Strong Wind	Relatively Low
Heat Wave	Relatively Low
Winter Weather	Very Low
Lightning	Very Low
Ice Storm	Very Low
Drought	Relatively High
Cold Wave	Relatively Low
Landslide	Very 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	136 km
Jul 16, 2004	6 km SSE of Riverton, Iowa	M3.5	104 km
Feb 11, 1995	6 km E of Clearmont, Missouri	M3.1	62 km
Mar 31, 1993	2 km SE of Nemaha, Nebraska	M2.9	123 km

Source: USGS (M2.5+, 1990–2025)

Tornado History

571 tornadoes (EF0+) within 100 km since 1950. Strongest: EF5. Total: 22 fatalities, 244 injuries.

Date	Rating	Distance	Fatalities
Jun 27, 1953	EF5	77 km	1
May 21, 2024	EF4	50 km	5
Mar 5, 2022	EF4	48 km	6
Apr 8, 1999	EF4	47 km	0
Apr 8, 1999	EF4	24 km	0
May 27, 1995	EF4	30 km	0
May 24, 1989	EF4	37 km	0
Jun 7, 1984	EF4	51 km	3
Jun 2, 1980	EF4	41 km	0
Mar 29, 1979	EF4	78 km	0
Apr 21, 1973	EF4	86 km	0
Jun 22, 1964	EF4	94 km	0
Apr 12, 1964	EF4	76 km	1
May 10, 1959	EF4	80 km	0
Apr 5, 1954	EF4	92 km	0
May 10, 1953	EF4	85 km	0
May 21, 2024	EF3	73 km	0
Mar 5, 2022	EF3	82 km	1
Aug 20, 2019	EF3	85 km	0
Apr 11, 2001	EF3	48 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	95 km

Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	22°F (-6°C)	0.8 in	Coldest, Driest
February	28°F (-3°C)	1.0 in
March	39°F (4°C)	2.2 in
April	51°F (11°C)	3.1 in
May	62°F (17°C)	4.3 in
June	71°F (22°C)	4.3 in
July	74°F (23°C)	4.4 in	Warmest, Wettest
August	73°F (23°C)	4.1 in
September	65°F (18°C)	4.2 in
October	53°F (12°C)	2.8 in
November	39°F (4°C)	2.1 in
December	26°F (-3°C)	1.2 in

Diagonal has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 34.6 inches, with July being the wettest month (4.4") and January the driest (0.8").

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