Hail History

Hail history for Onalaska, Wisconsin

NOAA hail reports in and within about 5 km (3 miles) of Onalaska since 1981, with preliminary reports to November 3, 2026.

Readout · Onalaska

Last hail
Aug 18, 2026
1.00 in, quarter size · preliminary
Hail days, last 5 years
3
since Nov 3, 2021 · 4 reports
Largest ever
2.50 in
tennis ball · Jul 25, 2013

32 reports on 21 days since 1981 · #30 of 271 Wisconsin places

Hail map · Onalaska

Onalaska La Crosse West Salem Holmen St. Joseph Trempealeau Galesville Sparta 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
32 most recent reports with a location; La Crosse County is shaded. Open street map

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What the record says about Onalaska

The latest hail report in and around Onalaska is from August 18, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 3 separate hail days; the biggest stones in that time were 1.25 in on August 18, 2026.

Over the 20 years 2006–2025, Onalaska logged 17 reports on 9 hail days, about 0.8 reports a year. That is 89% more than the median Wisconsin town on this site (0.5 a year) and ranks #30 of 271 Wisconsin cities and towns on this site for all-time reports. Onalaska accounts for 14% of the 227 reports filed in La Crosse County.

3% of reports with a size were 2 inches (hen egg) or larger, against 6% for the median Wisconsin town on this site. The largest hail on record here is 2.50 in (tennis ball) on July 25, 2013 near 0.47 N Medary.

Reports were up 43% in 2016–2025 (10) compared with 2006–2015 (7). The busiest year was 2021, with 4 reports on 2 days. Hail here peaks in July (44% of reports); 41% fall between April and June.

Reports a year 2006–2025 average

  • Onalaska 0.8
  • La Crosse County 6.2
  • Median Wisconsin town on this site 0.5

Hail days 2006–2025

  • Onalaska 9
  • La Crosse County 40
  • Median Wisconsin town on this site 7

Share 2 in or larger of sized reports

  • Onalaska 3%
  • La Crosse County 12%
  • Median Wisconsin town on this site 6%

Hail over time

01234 1981: 1 reports, largest 1.75 in 1984: 1 reports, largest 0.75 in 1986: 1 reports, largest 1.75 in 1990 1999: 1 reports, largest 0.88 in 2000: 1 reports, largest 0.75 in 2000 2001: 3 reports, largest 0.88 in 2002: 1 reports, largest 0.75 in 2004: 2 reports, largest 0.75 in 2005: 1 reports, largest 0.88 in 2008: 1 reports, largest 0.75 in 2010: 1 reports, largest 1.00 in 2010 2011: 1 reports, largest 0.88 in 2013: 4 reports, largest 2.50 in 2017: 2 reports, largest 1.50 in 2020: 3 reports, largest 1.00 in 2020 2021: 4 reports, largest 1.00 in 2022: 1 reports, largest 1.00 in 2026: 3 reports, largest 1.25 in
Reports per year, 1981–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
051015 Jan Feb March: 1 reports (3%) Mar April: 6 reports (19%) Apr May: 3 reports (9%) May June: 4 reports (13%) Jun July: 14 reports (44%) Jul August: 4 reports (13%) Aug Sep Oct Nov Dec
All 32 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 12 3
2025 0
2024 0
2023 0
2022 1 1
2021 22 4
2020 3 3
2019 0
2018 0
2017 2 2

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Aug 18, 2026 2 1.25 in View
Jun 5, 2026 1 1.00 in —
May 19, 2022 1 1.00 in —

Largest hail on record

Largest hail reports in Onalaska
Date Size Location County Damage Time · source
Jul 25, 2013 2.50 intennis ball 0.47 N Medary La Crosse $150K 14:04 local · NCEI
Jul 30, 1986 1.75 ingolf ball — La Crosse — 07:30 local · NCEI
Apr 3, 1981 1.75 ingolf ball — La Crosse — 08:58 local · NCEI
Jul 6, 2017 1.50 inping pong ball 0.85 NE Onalaska La Crosse — 19:35 local · NCEI
Jul 25, 2013 1.50 inping pong ball 0.18 ESE Medary La Crosse $44K 14:05 local · NCEI

Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.

Size of every report

Most recent reports

Most recent hail reports in Onalaska
Date Size Location County Damage Time · source
Aug 18, 2026 1.00 inquarter 1 NE Onalaska La Crosse — 20:24 UTC · NWS prelim.
Aug 18, 2026 1.25 inhalf dollar 1 WNW Onalaska La Crosse — 20:23 UTC · NWS prelim.
Jun 5, 2026 1.00 inquarter 0.69 S Onalaska La Crosse — 20:10 local · NCEI
May 19, 2022 1.00 inquarter 0.5 E Midway La Crosse — 20:20 local · NCEI
Aug 7, 2021 0.88 innickel 2.42 NW West Salem Arpt La Crosse — 13:38 local · NCEI
Aug 7, 2021 1.00 inquarter 2.03 SE Midway La Crosse — 13:19 local · NCEI
Jun 17, 2021 0.75 inpenny 0.5 E Midway La Crosse — 22:05 local · NCEI
Jun 17, 2021 1.00 inquarter 1.7 SE Midway La Crosse — 22:04 local · NCEI
Jul 7, 2020 1.00 inquarter 1.47 NNE Onalaska La Crosse $1K 12:27 local · NCEI
Jul 7, 2020 1.00 inquarter 1.38 N Onalaska La Crosse $4K 12:24 local · NCEI
Jul 7, 2020 0.75 inpenny 1.7 SE Midway La Crosse — 12:23 local · NCEI
Jul 6, 2017 1.00 inquarter 1.21 NE Medary La Crosse — 19:38 local · NCEI

Hail history near Onalaska

Questions about hail in Onalaska

How often does it hail in Onalaska, Wisconsin?

32 hail reports have been logged in and within about 5 km (3 miles) of Onalaska since 1981. Over the 20 years 2006–2025 that averages 0.8 reports a year. That ranks #30 of 271 Wisconsin places by number of reports.

When is hail season in Onalaska?

Most reports come in July, April, June. July alone accounts for 44% of all reports.

What is the largest hail recorded in Onalaska?

2.50 in (tennis ball size) on July 25, 2013 near 0.47 N Medary. 3% of reports here were 2 inches or larger.

When did it last hail in Onalaska?

The most recent report in this data is from August 18, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Onalaska had in the last five years?

3 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was August 18, 2026.

Where does this hail data come from?

Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.