Weather & Climate in Hillsboro, WI

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

Hillsboro 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 972 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	972 ft (296 m)
Area	1.4 sq mi (3.7 km²)
Population Density	939/sq mi
Coordinates	43.6565°N, 90.3344°W
Timezone	America/Chicago
County	Richland County County
Nearest Airport	Tri-County Regional (LNR) 32 miles away

Precipitation & Snow

Annual Rainfall 37.3"

2% below US avg

Snowfall 38.7"

Wettest Month (Aug) 4.13"

Driest Month (Jan) 0.91"

Air Quality

AQI Median	38.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	51.6 / 100
Social Vulnerability	70.0 / 100
Community Resilience	63.6 / 100

Hazard Breakdown

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

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

Tornado History

361 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 20 fatalities, 453 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 7, 1984	EF5	82 km	36.0 mi	9
Jul 3, 1983	EF4	78 km	0.5 mi	0
Apr 19, 1957	EF4	27 km	21.1 mi	1
Sep 26, 1951	EF4	90 km	9.0 mi	1
Aug 7, 2021	EF3	66 km	9.4 mi	0
Jun 16, 2014	EF3	96 km	1.0 mi	0
Aug 27, 1994	EF3	60 km	10.5 mi	2
Aug 29, 1992	EF3	80 km	28.0 mi	1
Jun 8, 1984	EF3	92 km	29.0 mi	0
Jul 3, 1983	EF3	48 km	1.0 mi	0
Jun 5, 1980	EF3	71 km	26.9 mi	0
Aug 2, 1967	EF3	92 km	0.1 mi	2
Sep 3, 1964	EF3	56 km	17.1 mi	0
Aug 16, 1963	EF3	64 km	9.6 mi	0
Aug 16, 1963	EF3	64 km	9.6 mi	0
Aug 16, 1963	EF3	64 km	9.6 mi	0
May 26, 1959	EF3	95 km	34.3 mi	0
Apr 19, 1957	EF3	11 km	9.0 mi	0
Jun 15, 2022	EF2	30 km	22.9 mi	0
Jun 29, 2014	EF2	72 km	29.1 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	69 km
1987	BIG BURN	3,154	58 km
2024	2024 DOD HARDWOOD RANGE RX	2,717	68 km
1994	BIG BURN	2,248	57 km
2023	2023 RX	1,992	67 km
1997	BIG BURN	1,642	58 km
2004	POOL ONE NORTH	1,576	48 km
1998	UNNAMED	1,297	58 km
2021	2021 DOD HARDWOOD RANGE RX	987	67 km
2007	UNNAMED	981	47 km
2003	UNNAMED	901	57 km
1998	PR 17	896	48 km
2007	UNNAMED	875	49 km
2009	UNNAMED	867	48 km
2007	PR 16	778	57 km
2006	PR 17 RX FIRE	701	58 km
2018	2018 BADGER RX BURNS	659	57 km
2005	UNNAMED	657	51 km
2003	PR 17	632	58 km
2019	2019 BADGER RX BURNS	627	58 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)	2.0 in
April	45°F (7°C)	3.2 in
May	57°F (14°C)	3.5 in
June	66°F (19°C)	3.9 in
July	71°F (22°C)	4.0 in	Warmest
August	68°F (20°C)	4.1 in	Wettest
September	60°F (16°C)	4.1 in
October	49°F (9°C)	2.4 in
November	34°F (1°C)	2.1 in
December	21°F (-6°C)	1.3 in

Hillsboro 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 August being the wettest month (4.1") and January the driest (0.9").

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