Weather & Climate in Union Center, WI

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Union Center experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 17°F in January while summers reach 71°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 37.3 inches. The area receives 38.7 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 940 feet.

Temperature

17°F Jan (-8°C) 71°F Jul (22°C)

Annual Average	46.0°F
	15% below US avg
January Average	17°F (-8°C)
July Average	71°F (22°C)
Sunny Days	260 days/yr

Geography

Elevation	940 ft (287 m)
Area	0.8 sq mi (1.9 km²)
Population Density	294/sq mi
Coordinates	43.6826°N, 90.2633°W
Timezone	America/Chicago
County	Juneau County County
Nearest Airport	Tri-County Regional (LNR) 33 miles away

Precipitation & Snow

Annual Rainfall 37.3"

2% below US avg

Snowfall 38.7"

Wettest Month (Sep) 4.25"

Driest Month (Jan) 0.91"

Air Quality

AQI Median	38.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	70.8 / 100
Social Vulnerability	64.1 / 100
Community Resilience	49.1 / 100

Hazard Breakdown

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

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

Tornado History

374 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 20 fatalities, 467 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 7, 1984	EF5	83 km	36.0 mi	9
Jul 3, 1983	EF4	80 km	0.5 mi	0
Apr 19, 1957	EF4	22 km	21.1 mi	1
Sep 26, 1951	EF4	85 km	9.0 mi	1
Aug 7, 2021	EF3	72 km	9.4 mi	0
Jun 16, 2014	EF3	95 km	1.0 mi	0
Jun 23, 2004	EF3	99 km	33.3 mi	0
Aug 27, 1994	EF3	54 km	10.5 mi	2
Aug 29, 1992	EF3	74 km	28.0 mi	1
Jun 8, 1984	EF3	87 km	29.0 mi	0
Jul 3, 1983	EF3	44 km	1.0 mi	0
Jun 5, 1980	EF3	77 km	26.9 mi	0
Jun 4, 1975	EF3	97 km	2.3 mi	0
Aug 2, 1967	EF3	90 km	0.1 mi	2
Sep 3, 1964	EF3	61 km	17.1 mi	0
Aug 16, 1963	EF3	61 km	9.6 mi	0
Aug 16, 1963	EF3	61 km	9.6 mi	0
Aug 16, 1963	EF3	61 km	9.6 mi	0
May 26, 1959	EF3	99 km	34.3 mi	0
Apr 19, 1957	EF3	14 km	9.0 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: COTTONVILLE INCIDENT (3,466 acres, 2005).

Year	Name	Acres Burned	Distance
2005	COTTONVILLE INCIDENT	3,466	63 km
1987	BIG BURN	3,154	54 km
2024	2024 DOD HARDWOOD RANGE RX	2,717	63 km
1994	BIG BURN	2,248	53 km
2023	2023 RX	1,992	63 km
1997	BIG BURN	1,642	55 km
2004	POOL ONE NORTH	1,576	44 km
1998	UNNAMED	1,297	54 km
2021	2021 DOD HARDWOOD RANGE RX	987	63 km
2007	UNNAMED	981	44 km
2003	UNNAMED	901	53 km
1998	PR 17	896	44 km
2007	UNNAMED	875	44 km
2009	UNNAMED	867	44 km
2007	PR 16	778	54 km
2006	PR 17 RX FIRE	701	54 km
2018	2018 BADGER RX BURNS	659	54 km
2005	UNNAMED	657	47 km
2003	PR 17	632	54 km
2019	2019 BADGER RX BURNS	627	55 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	17°F (-8°C)	0.9 in	Coldest, Driest
February	20°F (-7°C)	1.0 in
March	31°F (-0°C)	2.1 in
April	44°F (7°C)	3.0 in
May	57°F (14°C)	3.5 in
June	66°F (19°C)	3.9 in
July	71°F (22°C)	3.9 in	Warmest
August	68°F (20°C)	4.1 in
September	60°F (15°C)	4.3 in	Wettest
October	48°F (9°C)	2.4 in
November	34°F (1°C)	2.1 in
December	20°F (-7°C)	1.4 in

Union Center has a seasonal temperature swing of 54°F / from 17°F in January to 71°F in July. Total annual precipitation is 32.5 inches, with September being the wettest month (4.3") and January the driest (0.9").

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