Hail History

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Hail history for Janesville, WI

Last hail within 10 milesAug 7, 20260.75 in (penny)
Hail days, last 12 months4
Largest hail since 20062.25 inAug 2, 2011
Hail days since 200633
Days with hail 1 inch or larger16
Tornadoes within 10 miles11
Damaging wind reports within 10 miles77

Hail has been reported within 10 miles of Janesville on 33 days since 2006. The largest stones measured 2.25 in on Aug 2, 2011. Hail is most common here in May and June.

Janesville ranks #534 for hail days among the 1,399 U.S. cities of 25,000 to 100,000 people. See the ranking →

Recent hail near Janesville

DateHail sizeWhereSource
Aug 7, 20260.75 in
penny		Janesville
1 hail report · closest 4 mi from Janesville		NWS storm report (preliminary)
Jun 24, 20261.25 in
half dollar		Milton
1 hail report · closest 8 mi from Janesville		NOAA Storm Events
Apr 17, 20261.75 in
golf ball		Milton, Downtown Janesville
2 hail reports · closest near the center of Janesville		NOAA Storm Events
Apr 2, 20261.5 in
ping pong ball		Downtown Janesville
4 hail reports · closest near the center of Janesville		NOAA Storm Events
Aug 16, 20251.5 in
ping pong ball		Downtown Janesville, Janesville Airport
5 hail reports · closest 1 mi from Janesville		NOAA Storm Events
Apr 18, 20251.75 in
golf ball		Mallwood
1 hail report · closest 9 mi from Janesville		NOAA Storm Events

One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.

Hail days near Janesville by year

406072080921031111211311411521611711811912012112223424225426

When hail season peaks near Janesville

Of the 33 hail days since 2006, most fell in May (9) and June (6).

Jan1Feb1Mar4Apr9May6Jun1Jul6Aug4Sep1OctNovDec

Largest hail storms near Janesville

Aug 2, 2011 · 2.25 in · Downtown Janesville (0 mi from Janesville)

National Weather Service description (English): The father of a trained spotter reported a severe thunderstorm that produced 2.25 inch hail as it moved east-southeast along State Highway 11 from downtown Janesville.

Apr 18, 2025 · 1.75 in (golf ball) · Mallwood (9 mi from Janesville)

National Weather Service description (English): Golf ball sized hail, some even large. Car dents and tree damage.

Apr 17, 2026 · 1.75 in (golf ball) · Milton (8 mi from Janesville)

Aug 24, 2006 · 1.5 in (ping pong ball) · Prairie Du Sac (7 mi from Janesville)

May 2, 2018 · 1.5 in (ping pong ball) · Downtown Janesville (3 mi from Janesville)

Tornadoes within 10 miles of Janesville

DateRatingWherePath
Apr 17, 2026EF1Tiffany
7 mi from Janesville		1.9 mi long, 75 yd wide
Apr 17, 2026EF1Emerald Grove
6 mi from Janesville		2.1 mi long, 100 yd wide
Apr 17, 2026EF1Johnstown Center
9 mi from Janesville		3.3 mi long, 75 yd wide
Jun 22, 2024EF2Afton
6 mi from Janesville		6.0 mi long, 700 yd wide
May 26, 2024EF0Leyden
5 mi from Janesville		11.8 mi long, 50 yd wide
May 26, 2024EF0Emerald Grove
5 mi from Janesville		10.9 mi long, 50 yd wide
Jul 13, 2023EF0Emerald Grove
7 mi from Janesville		0.4 mi long, 25 yd wide
Jun 28, 2017EF0Leyden
4 mi from Janesville		0.8 mi long, 100 yd wide
Sep 21, 2010EF0Prairie Airport
8 mi from Janesville		0.4 mi long, 30 yd wide
Jun 23, 2009EF0Milton Jct
8 mi from Janesville		0.8 mi long, 30 yd wide
Aug 26, 2006F0Shopiere
10 mi from Janesville		0.1 mi long, 20 yd wide

Damaging thunderstorm winds near Janesville

77 reports of damaging thunderstorm wind within 10 miles of Janesville since 2006, on 54 days. The strongest measured gust was 78 mph on Aug 9, 2009.

DateStrongest gustWhereSource
Jul 2, 2026damage reportedJanesville
1 wind report		NWS storm report (preliminary)
Jun 24, 202660 mph, estimatedMilton
1 wind report		NOAA Storm Events
Jun 10, 202681 mph, estimatedCharlie Bluff, Milton
2 wind reports		NOAA Storm Events
Aug 16, 202558 mph, estimatedDowntown Janesville
1 wind report		NOAA Storm Events
Jun 25, 202558 mph, estimatedTiffany
1 wind report		NOAA Storm Events
Mar 14, 202575 mph, measuredMilton Jct, Downtown Janesville, Beloit North
4 wind reports		NOAA Storm Events
Jul 14, 202458 mph, estimatedDowntown Janesville
3 wind reports		NOAA Storm Events
Jun 22, 202464 mph, estimatedHanover, Afton, Rock Co Airport
5 wind reports		NOAA Storm Events
Jun 3, 202470 mph, estimatedRock Co Airport, Downtown Janesville
2 wind reports		NOAA Storm Events
May 21, 202470 mph, estimatedDowntown Janesville, Milton Jct
2 wind reports		NOAA Storm Events

Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.

Filing a roof or car hail claim?

Insurers ask for the date of loss. The dates on this page are when hail was reported near Janesville; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.

Nearby cities

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Janesville.

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