Shamrock Colony, SD

Full City Profile · South Dakota · Clark County County

3.0 /5.0

B Good

65 Population 100/sq mi density

43°F Avg Temperature 276 sunny days/yr

386 Violent Crime/100K 2,427 property/100K

Overall

3.0 / 5.0

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

Safety

1.0 / 5.0

386 violent crimes/100K (1% above avg)

A+

Education

5.0 / 5.0

63.9% bachelor's degree or higher

Shamrock Colony has a cool climate with an average annual temperature of 43°F (6°C). Winters average 12°F in January while summers reach 71°F in July. The area gets 276 sunny days per year. Annual precipitation totals 24.0 inches. Air quality is rated Good with a median AQI of 35.

Temperature

12°F Jan (-11°C) 71°F Jul (21°C)

Annual Average	43.0°F
	20% below US avg
January Average	12°F (-11°C)
July Average	71°F (21°C)
Sunny Days	276 days/yr

Geography

Elevation	1,402 ft (427 m)
Area	0.7 sq mi (1.7 km²)
Population Density	100/sq mi
Coordinates	44.6210°N, 97.9651°W
Timezone	America/Chicago
County	Clark County County
Nearest Airport	Huron Regional (HON) 21 miles away

Precipitation & Snow

Annual Rainfall 24.0"

37% below US avg

Wettest Month (Jun) 3.46"

Driest Month (Jan) 0.43"

Air Quality

AQI Median	35.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	4.6 / 100
Social Vulnerability	10.6 / 100
Community Resilience	61.2 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Very Low
Wildfire	Very Low
Flood	Very Low
Hail	Relatively Low
Strong Wind	Very Low
Heat Wave	Very Low
Winter Weather	Relatively Low
Lightning	Very Low
Ice Storm	Relatively Low
Drought	No Rating
Cold Wave	Relatively Low
Landslide	Very Low

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

Earthquake History

5 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.6. Most recent: M2.5 on Jan 16, 2022.

Oct 25, 1990	8 km N of Plankinton, South Dakota	M3.6	100 km
Jul 26, 2002	0 km WSW of Huron, South Dakota	M3.1	35 km
Feb 7, 2014	11 km NE of Bijou Hills, South Dakota	M3.0	144 km
Jul 3, 1995	9 km SSW of Fort Thompson, South Dakota	M2.8	140 km
Jan 16, 2022	9 km NE of Plankinton, South Dakota	M2.5	101 km

Source: USGS (M2.5+, 1990–2025)

Tornado History

449 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 11 fatalities, 231 injuries.

Date	Rating	Distance	Fatalities
Jun 18, 2014	EF4	74 km	0
Jun 24, 2003	EF4	41 km	0
May 30, 1998	EF4	100 km	6
Jun 7, 1993	EF4	99 km	0
May 30, 2022	EF3	92 km	0
Aug 24, 2006	EF3	68 km	0
Jun 24, 2003	EF3	75 km	0
Jun 24, 2003	EF3	28 km	0
Jun 7, 1993	EF3	52 km	0
Jun 16, 1992	EF3	69 km	0
Jun 16, 1992	EF3	70 km	0
May 12, 1984	EF3	34 km	0
Jul 18, 1983	EF3	70 km	0
Jul 1, 1973	EF3	82 km	1
Jun 15, 1970	EF3	96 km	0
Jun 25, 1969	EF3	93 km	0
Jun 21, 1961	EF3	97 km	1
May 30, 2022	EF2	91 km	0
May 12, 2022	EF2	75 km	0
May 12, 2022	EF2	89 km	0

Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

3 wildfires (100+ acres) within 100 km. Largest: GANN VALLEY (2,534 ac, 2000).

Year	Name	Acres	Distance
2000	GANN VALLEY	2,534	89 km
2000	PHEASANT OPENER	1,206	78 km
2009	TAHOHPI WUI RX	1,166	43 km

Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	12°F (-11°C)	0.4 in	Coldest, Driest
February	20°F (-7°C)	0.6 in
March	32°F (-0°C)	1.4 in
April	46°F (8°C)	2.1 in
May	58°F (15°C)	2.9 in
June	68°F (20°C)	3.5 in	Wettest
July	71°F (21°C)	2.9 in
August	71°F (22°C)	2.3 in	Warmest
September	61°F (16°C)	1.9 in
October	48°F (9°C)	1.6 in
November	30°F (-1°C)	0.9 in
December	17°F (-8°C)	0.4 in

Shamrock Colony has a seasonal temperature swing of 59°F / from 12°F in January to 71°F in August. Total annual precipitation is 20.8 inches, with June being the wettest month (3.5") and January the driest (0.4").

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