Hail events in Rock County, Wisconsin The hail events on record, by date and by year

This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).

NCEI has 174 hail events on record for Rock County, Wisconsin, from 1955 through 30 Jun 2026.

The newest hail event on record is on 24 Jun 2026.

From 2016 through 2025, NCEI has 57 hail events on record for the county.

The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.
The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.
The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on 2 Oct 2026.

Date of the data: NCEI storm events through 30 Jun 2026. Event types on this page: Hail.

Newest hail events on record

Jun 24 2026

Hail1.25 in, half dollar size

2 miles ESE of MILTON

Apr 17 2026

Hail2.00 in, hen egg size

1 mile E of BELOIT

Hail1.75 in, golf ball size

1 mile E of BELOIT

Hail1.50 in, ping-pong ball size

1 mile W of DOWNTOWN JANESVILLE

Hail1.75 in, golf ball size

1 mile N of MILTON

Apr 2 2026

Hail1.25 in, half dollar size

1 mile NW of DOWNTOWN JANESVILLE

Hail1.50 in, ping-pong ball size

2 miles NNE of DOWNTOWN JANESVILLE

Hail0.88 in, nickel size

3 miles N of DOWNTOWN JANESVILLE

Hail0.75 in, penny size

3 miles ENE of DOWNTOWN JANESVILLE

Mar 10 2026

Hail1.00 in, quarter size

1 mile S of BELOIT

Aug 16 2025

Hail1.50 in, ping-pong ball size

At CLINTON

Hail1.00 in, quarter size

1 mile SE of CLINTON

Hail1.00 in, quarter size

3 miles NNE of DOWNTOWN JANESVILLE

Hail1.00 in, quarter size

1 mile N of DOWNTOWN JANESVILLE

Hail1.00 in, quarter size

2 miles N of JANESVILLE AIRPORT

Hail1.00 in, quarter size

2 miles NNW of DOWNTOWN JANESVILLE

Hail1.50 in, ping-pong ball size

2 miles WNW of DOWNTOWN JANESVILLE

Apr 18 2025

Hail1.75 in, golf ball size

At EDGERTON

Hail2.00 in, hen egg size

1 mile NE of MALLWOOD

Hail1.75 in, golf ball size

1 mile E of MALLWOOD

Hail2.75 in, baseball size

1 mile N of EDGERTON

Hail1.75 in, golf ball size

1 mile SW of MALLWOOD

Hail2.50 in, tennis ball size

At EDGERTON

Hail1.75 in, golf ball size

At EVANSVILLE

Hail2.75 in, baseball size

2 miles NW of FULTON

A place is the text of the NCEI record: a distance and a direction from a reference place. The site does not show a place text that names a private property or reads as a person. Hail size is in inches, with the object that NCEI names for that size.

Hail events by year

Hail events on record for Rock County by year, 1950 to 2026
Decade	Year that ends in 0	Year that ends in 1	Year that ends in 2	Year that ends in 3	Year that ends in 4	Year that ends in 5	Year that ends in 6	Year that ends in 7	Year that ends in 8	Year that ends in 9	All
1950s	0	0	0	0	0	0	0	0	0	0	0
1960s	0	1	2	0	0	0	0	0	0	0	3
1970s	1	0	0	0	0	3	0	0	1	0	5
1980s	1	0	0	0	1	0	0	0	2	0	4
1990s	2	0	2	0	4	1	1	1	3	3	17
2000s	5	4	4	7	1	13	11	5	4	0	54
2010s	5	5	6	1	5	2	4	3	3	2	36
2020s	2	4	9	2	10	18	10 (part of the year)				55

A darker cell has a larger count. The number is in each cell.

Hail events are on record from 1955. The year 2026 has the events through 30 Jun 2026 only.

By month, all years

Jan0 events
Feb2 events
Mar14 events
Apr34 events
May32 events
Jun25 events
Jul22 events
Aug26 events
Sep12 events
Oct7 events
Nov0 events
Dec0 events

Magnitudes on record

Hail events on record for Rock County by hail size
Hail size	Size in words	Events
under 1 in	pea to quarter	58
1 to 1.74 in	quarter to golf ball	81
1.75 to 2.74 in	golf ball to baseball	31
2.75 to 3.99 in	baseball to softball	4
4 in and larger	softball and larger	0

When listing hail size under Magnitude, e.g., 2.25 in., the hail size is given in inches and hundredths of inches. These values are assigned a size in inches from their appearance.

The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on 2 Oct 2026.

An event without a size in the record is not in this table.

Beside the other counties

Hail events on record: Rock County beside the total of the counties of Wisconsin and of the United States
Measure	Rock	All counties of Wisconsin	All counties of the United States
Hail events, 1955 to 2026	174	9,251	423,723
Events for each 100 square miles	24.2	17.1	12.0
Events for each 10,000 residents	10.6	15.7	12.8

The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. A forecast zone with another name than a county counts for the state only.

More hail events on record

Hail events on record for Rock County, newest first, without the 25 newest events above
Date	Event type	Magnitude	Damage estimate	On record for
18 Apr 2025	Hail	2.00 in	none	County
18 Apr 2025	Hail	2.00 in	none	County
18 Apr 2025	Hail	2.75 in	none	County
25 Jun 2024	Hail	1.00 in	none	County
25 Jun 2024	Hail	1.00 in	none	County
25 Jun 2024	Hail	1.00 in	none	County
25 Jun 2024	Hail	1.25 in	none	County
25 Jun 2024	Hail	1.00 in	none	County
7 May 2024	Hail	0.75 in	none	County
4 Mar 2024	Hail	1.50 in	none	County
4 Mar 2024	Hail	1.00 in	none	County
4 Mar 2024	Hail	0.75 in	none	County
8 Feb 2024	Hail	0.75 in	none	County
5 Apr 2023	Hail	0.88 in	none	County
4 Apr 2023	Hail	1.25 in	none	County
20 Sep 2022	Hail	0.88 in	none	County
23 Jul 2022	Hail	1.25 in	none	County
23 Jul 2022	Hail	1.75 in	none	County
23 Jul 2022	Hail	1.25 in	none	County
23 Jul 2022	Hail	1.00 in	none	County
23 Jul 2022	Hail	2.00 in	none	County
5 Jul 2022	Hail	0.88 in	none	County
5 Jul 2022	Hail	1.00 in	none	County
5 Jul 2022	Hail	1.00 in	none	County
7 Sep 2021	Hail	1.00 in	none	County
7 Sep 2021	Hail	1.00 in	none	County
7 Sep 2021	Hail	1.00 in	none	County
6 Aug 2021	Hail	1.00 in	none	County
7 Jul 2020	Hail	0.88 in	none	County
23 May 2020	Hail	1.00 in	none	County
1 Oct 2019	Hail	1.00 in	none	County
1 Jun 2019	Hail	1.00 in	none	County
2 May 2018	Hail	1.50 in	$50 thousand	County
2 May 2018	Hail	1.00 in	none	County
2 May 2018	Hail	1.50 in	none	County
10 Aug 2017	Hail	1.00 in	none	County
17 May 2017	Hail	1.00 in	none	County
17 May 2017	Hail	1.00 in	none	County
18 Aug 2016	Hail	0.75 in	none	County
23 Jul 2016	Hail	1.00 in	none	County
28 May 2016	Hail	0.88 in	none	County
15 Mar 2016	Hail	1.00 in	none	County
3 Sep 2015	Hail	1.00 in	none	County
15 Aug 2015	Hail	0.88 in	none	County
1 Aug 2014	Hail	1.00 in	none	County
12 May 2014	Hail	0.75 in	none	County
12 May 2014	Hail	1.75 in	none	County
13 Apr 2014	Hail	0.75 in	none	County
13 Apr 2014	Hail	1.00 in	none	County
19 Sep 2013	Hail	1.00 in	none	County
18 Jul 2012	Hail	1.00 in	none	County
18 Jul 2012	Hail	2.00 in	$6 thousand	County
28 May 2012	Hail	0.75 in	none	County
6 May 2012	Hail	1.00 in	none	County
6 May 2012	Hail	1.00 in	none	County
17 Mar 2012	Hail	0.75 in	none	County
20 Aug 2011	Hail	0.75 in	none	County
20 Aug 2011	Hail	1.25 in	none	County
2 Aug 2011	Hail	2.25 in	none	County
22 May 2011	Hail	0.75 in	none	County
13 May 2011	Hail	0.75 in	none	County
21 Sep 2010	Hail	0.75 in	none	County
21 Sep 2010	Hail	0.75 in	none	County
21 Jun 2010	Hail	1.50 in	$10 thousand	County
31 May 2010	Hail	1.00 in	none	County
31 May 2010	Hail	1.00 in	none	County
28 Jun 2008	Hail	0.88 in	none	County
20 Jun 2008	Hail	0.88 in	none	County
7 Jun 2008	Hail	0.75 in	none	County
5 Jun 2008	Hail	1.00 in	none	County
9 Jul 2007	Hail	1.00 in	none	County
29 Apr 2007	Hail	1.00 in	none	County
21 Mar 2007	Hail	1.00 in	none	County
21 Mar 2007	Hail	1.00 in	none	County
21 Mar 2007	Hail	0.88 in	none	County
2 Oct 2006	Hail	0.75 in	none	County
2 Oct 2006	Hail	0.88 in	none	County
25 Aug 2006	Hail	0.75 in	none	County
24 Aug 2006	Hail	1.75 in	none	County
24 Aug 2006	Hail	0.75 in	none	County
24 Aug 2006	Hail	2.50 in	none	County
23 Aug 2006	Hail	0.75 in	none	County
21 Jun 2006	Hail	0.75 in	none	County
17 May 2006	Hail	0.75 in	none	County
13 Apr 2006	Hail	1.75 in	$4.4 million	County
12 Mar 2006	Hail	0.88 in	none	County
22 Sep 2005	Hail	1.00 in	none	County
25 Jul 2005	Hail	1.75 in	$2.6 million	County
25 Jul 2005	Hail	1.00 in	none	County
5 Jun 2005	Hail	0.88 in	none	County
19 May 2005	Hail	0.75 in	none	County
19 May 2005	Hail	0.88 in	none	County
19 May 2005	Hail	0.75 in	none	County
19 May 2005	Hail	0.88 in	none	County
19 May 2005	Hail	1.00 in	none	County
19 May 2005	Hail	1.25 in	none	County
19 May 2005	Hail	1.00 in	none	County
19 May 2005	Hail	1.75 in	none	County
7 Mar 2005	Hail	0.75 in	none	County
29 Oct 2004	Hail	0.75 in	none	County
3 Aug 2003	Hail	1.00 in	$25 thousand	County
2 Aug 2003	Hail	0.75 in	none	County
1 Aug 2003	Hail	1.75 in	$50 thousand	County
1 Aug 2003	Hail	1.00 in	none	County
31 Jul 2003	Hail	0.75 in	none	County
6 Jul 2003	Hail	0.75 in	none	County
28 May 2003	Hail	0.75 in	none	County
3 Jun 2002	Hail	0.75 in	none	County
18 Apr 2002	Hail	1.00 in	none	County
18 Apr 2002	Hail	0.75 in	none	County
18 Apr 2002	Hail	0.75 in	none	County
23 Oct 2001	Hail	0.88 in	none	County
23 Oct 2001	Hail	1.75 in	none	County
23 Oct 2001	Hail	1.75 in	none	County
8 Apr 2001	Hail	0.75 in	none	County
11 Sep 2000	Hail	1.00 in	none	County
30 Jun 2000	Hail	0.75 in	none	County
18 May 2000	Hail	1.00 in	none	County
8 May 2000	Hail	1.00 in	none	County
8 Mar 2000	Hail	0.75 in	none	County
19 Sep 1999	Hail	1.00 in	none	County
6 Jun 1999	Hail	0.75 in	none	County
11 Feb 1999	Hail	0.75 in	none	County
6 Sep 1998	Hail	1.00 in	none	County
25 Jun 1998	Hail	1.00 in	$1 thousand	County
25 Jun 1998	Hail	2.00 in	$3 thousand	County
20 Jun 1997	Hail	1.00 in	none	County
19 Apr 1996	Hail	1.75 in	none	County
27 Jun 1995	Hail	0.75 in	none	County
19 Jul 1994	Hail	0.75 in	none	County
7 Jul 1994	Hail	1.00 in	none	County
25 May 1994	Hail	1.00 in	none	County
25 May 1994	Hail	0.88 in	none	County
19 Jul 1992	Hail	1.00 in	none	County
15 Apr 1992	Hail	1.75 in	none	County
13 Mar 1990	Hail	0.75 in	none	County
13 Mar 1990	Hail	1.50 in	none	County
5 Apr 1988	Hail	1.13 in	none	County
5 Apr 1988	Hail	1.50 in	none	County
29 Aug 1984	Hail	1.75 in	none	County
20 Jul 1980	Hail	1.00 in	none	County
3 Apr 1978	Hail	1.75 in	none	County
4 Jun 1975	Hail	3.00 in	none	County
4 Jun 1975	Hail	1.75 in	none	County
4 Jun 1975	Hail	2.00 in	none	County
12 May 1970	Hail	1.50 in	none	County
22 Jul 1962	Hail	1.00 in	none	County
5 Jun 1962	Hail	1.00 in	none	County
4 Aug 1961	Hail	0.75 in	none	County

The table has all other events on record. A damage figure is an estimate in the NCEI record.

Official channels

NCEI Storm Events Database (opens in a new tab)Search the full NCEI record by state, county and date.
National Weather Service: Milwaukee/Sullivan, WI (opens in a new tab)The forecast office that issues the weather warnings for the county.
FEMA Flood Map Service Center: Search By Address (opens in a new tab)Search an address to see its flood map. This site has no flood-zone data.

These links open the pages of the agencies. The site checked the links on 2 Oct 2026.

Cite this page

County Hazards. "Hail events on record for Rock County, Wisconsin". https://countyhazards.com/county/wi/rock/hail/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026. Page made on 2 Oct 2026.

Questions

Which month has the most hail events on record for Rock County?: April has 34 of the 174 hail events on record from 1955 through 30 Jun 2026.
How many hail events are on record for Wisconsin?: NCEI has 9,265 hail events on record for Wisconsin from 1955 through 30 Jun 2026. That count has every forecast zone of the state.
How does Rock County compare with the other counties of Wisconsin?: The counties of Wisconsin have 17.1 hail events for each 100 square miles. Rock County has 24.2.
How large is the hail on record for Rock County?: 35 hail events have a size of 1.75 inches or more. NCEI names 1.75 inches a golf ball.