Union Star, MO

Full City Profile · Missouri

3.4 /5.0

B Good

510 Population 1,962/sq mi density

$57,907 Median Income $26,205 per capita

$84,500 Home Value $166,155 Zillow

$925 Median Rent 18.2% income on rent

53°F Avg Temperature 271 sunny days/yr

98 Violent Crime/100K 0 property/100K

Overall

3.4 / 5.0

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

Economy

4.1 / 5.0

$57,907 median income, 1.5% unemployment

A+

Affordability

5.0 / 5.0

$84,500 home value, $925/mo rent

Safety

2.0 / 5.0

98 violent crimes/100K

Education

2.4 / 5.0

17.5% bachelor's degree or higher

Union Star experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 25°F in January while summers reach 77°F in July. The area gets 271 sunny days per year. Annual precipitation totals 35.8 inches. The area receives 3.4 inches of snow annually. Air quality is rated Good with a median AQI of 41.

Temperature

25°F Jan (-4°C) 77°F Jul (25°C)

Annual Average	52.5°F
	3% below US avg
January Average	25°F (-4°C)
July Average	77°F (25°C)
Sunny Days	271 days/yr

Geography

Elevation	981 ft (299 m)
Area	0.3 sq mi (0.7 km²)
Population Density	1,962/sq mi
Coordinates	39.9798°N, 94.5989°W
Timezone	America/Chicago
Nearest Airport	Kansas City International (MCI) 48 miles away

Precipitation & Snow

Annual Rainfall 35.8"

6% below US avg

Snowfall 3.4"

Wettest Month (Sep) 4.80"

Driest Month (Feb) 0.98"

Air Quality

AQI Median	41.0
Rating	Good

Earthquake History

7 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.6. Most recent: M2.5 on Jul 15, 2025.

Dec 17, 2009	2 km NW of Auburn, Nebraska	M3.6	117 km
Jul 16, 2004	6 km SSE of Riverton, Iowa	M3.5	109 km
Mar 23, 2007	5 km N of Nortonville, Kansas	M3.1	86 km
Feb 11, 1995	6 km E of Clearmont, Missouri	M3.1	66 km
May 13, 1999	6 km WSW of Kansas City, Kansas	M3.0	98 km
Mar 31, 1993	2 km SE of Nemaha, Nebraska	M2.9	97 km
Jul 15, 2025	3 km W of Hale, Missouri	M2.5	112 km

Source: USGS (M2.5+, 1990–2025)

Tornado History

518 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 13 fatalities, 341 injuries.

Date	Rating	Distance	Fatalities
May 29, 2004	EF4	32 km	3
May 4, 2003	EF4	84 km	0
Jun 7, 1984	EF4	69 km	3
Jun 2, 1980	EF4	92 km	0
Mar 29, 1979	EF4	73 km	0
May 4, 1977	EF4	90 km	0
May 4, 1977	EF4	88 km	0
Apr 23, 1975	EF4	62 km	1
Apr 21, 1973	EF4	97 km	0
Apr 12, 1964	EF4	94 km	1
May 7, 1961	EF4	94 km	0
Apr 5, 1954	EF4	92 km	0
May 2, 2008	EF3	77 km	0
May 29, 2004	EF3	55 km	0
Apr 11, 2001	EF3	49 km	0
May 27, 1995	EF3	83 km	0
Jun 7, 1984	EF3	91 km	0
Apr 26, 1984	EF3	96 km	0
Mar 29, 1979	EF3	90 km	0
Mar 29, 1979	EF3	73 km	0

Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

7 wildfires (100+ acres) within 100 km. Largest: MOSQR-FY20-RX-WUI (964 ac, 2020).

Year	Name	Acres	Distance
2020	MOSQR-FY20-RX-WUI	964	58 km
2012	HIGHWAY E	897	80 km
2016	SQR BM SL DESOTO 2016 WUI RX	866	58 km
1988	NORTH POOL	698	58 km
2020	UNNAMED	645	57 km
2009	UNIT 6	625	57 km
2002	SCRDGRS 6	536	57 km

Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	25°F (-4°C)	1.0 in	Coldest
February	31°F (-1°C)	1.0 in	Driest
March	42°F (5°C)	2.4 in
April	53°F (12°C)	3.2 in
May	63°F (17°C)	4.6 in
June	72°F (22°C)	4.4 in
July	77°F (25°C)	4.1 in	Warmest
August	75°F (24°C)	4.1 in
September	67°F (19°C)	4.8 in	Wettest
October	55°F (13°C)	3.0 in
November	41°F (5°C)	1.9 in
December	29°F (-2°C)	1.4 in

Union Star has a seasonal temperature swing of 52°F / from 25°F in January to 77°F in July. Total annual precipitation is 35.8 inches, with September being the wettest month (4.8") and February the driest (1.0").

View full weather details →