Hail history for Ozaukee County, Wisconsin
Every NOAA hail report filed in Ozaukee County since 1961, with preliminary National Weather Service reports to November 5, 2026.
Readout · Ozaukee County
- Last hail
- May 7, 2024
- 1.00 in, quarter size
- Hail days, last 5 years
- 2
- since Nov 5, 2021 · 5 reports
- Largest ever
- 3.00 in
- teacup · Jun 23, 2004
71 reports on 45 days since 1961 · #64 of 73 Wisconsin counties
Hail map · Ozaukee County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Ozaukee County
The latest hail report in Ozaukee County is from May 7, 2024, 1.00 in (quarter size). Since November 5, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.00 in on May 7, 2024.
Over the 20 years 2006–2025, Ozaukee County logged 42 reports on 22 hail days, about 2.1 reports a year. That is 40% less than the median Wisconsin county (3.5 a year) and ranks #64 of 73 Wisconsin counties for all-time reports. Ozaukee County holds 1% of all 9,358 hail reports in Wisconsin.
9% of reports with a size were 2 inches (hen egg) or larger, against 7% for the median Wisconsin county. The largest hail on record here is 3.00 in (teacup) on June 23, 2004 near Thiensville.
Reports were up 21% in 2016–2025 (23) compared with 2006–2015 (19). The busiest year was 2020, with 9 reports on 1 day. Hail here peaks in April (24% of reports); 61% fall between April and June.
Reports a year 2006–2025 average
- Ozaukee County 2.1
- Median Wisconsin county 3.5
Hail days 2006–2025
- Ozaukee County 22
- Median Wisconsin county 37
Share 2 in or larger of sized reports
- Ozaukee County 9%
- Median Wisconsin county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 3 | 3 | |||||||||||
| 2023 | 2 | 2 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 9 | 9 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 2 | 1 | 3 |
Hail days since Nov 5, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 7, 2024 | 3 | 1.00 in | — |
| Apr 19, 2023 | 2 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Jun 23, 2004 | 3.00 inteacup | Thiensville | $50K | 20:59 local · NCEI |
| Apr 7, 2020 | 2.75 inbaseball | Cedarburg | — | 15:10 local · NCEI |
| Jul 27, 1989 | 2.50 intennis ball | — | — | 12:51 local · NCEI |
| Apr 7, 2020 | 2.00 inhen egg | Grafton | — | 15:14 local · NCEI |
| Jun 14, 1991 | 2.00 inhen egg | — | — | 12:30 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
- Under 1 in 32 45%
- 1–2 in 33 46%
- 2 in + 6 8%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| May 7, 2024 | 1.00 inquarter | 0.69 S Five Corners | 20:09 local · NCEI |
| May 7, 2024 | 0.75 inpenny | 0.5 W Grafton | 20:08 local · NCEI |
| May 7, 2024 | 0.75 inpenny | 0.69 S Five Corners | 20:03 local · NCEI |
| Apr 19, 2023 | 0.75 inpenny | 0.69 S Five Corners | 15:41 local · NCEI |
| Apr 19, 2023 | 1.00 inquarter | 0.5 W Grafton | 14:44 local · NCEI |
| Apr 7, 2020 | 1.50 inping pong ball | 1.22 NE Grafton | 15:22 local · NCEI |
| Apr 7, 2020 | 1.00 inquarter | 1.66 ESE Grafton | 15:15 local · NCEI |
| Apr 7, 2020 | 2.00 inhen egg | Grafton | 15:14 local · NCEI |
| Apr 7, 2020 | 1.00 inquarter | 0.5 W Grafton | 15:14 local · NCEI |
| Apr 7, 2020 | 0.75 inpenny | Saukville | 15:12 local · NCEI |
| Apr 7, 2020 | 1.25 inhalf dollar | 0.69 S Five Corners | 15:11 local · NCEI |
| Apr 7, 2020 | 2.75 inbaseball | Cedarburg | 15:10 local · NCEI |
Cities and towns in Ozaukee County
| Place | Reports | Largest |
|---|---|---|
| Mequon | 21 | 3.00 in |
| Cedarburg | 19 | 2.75 in |
| Grafton | 12 | 2.50 in |
| Port Washington | 10 | 1.75 in |
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Belgium | 6 | 6 | Jun 22, 2012 |
| Saukville | 5 | 4 | Apr 7, 2020 |
| Bayside | 1 | 1 | May 23, 2004 |
| Waubeka | 1 | 1 | May 22, 2011 |
Questions about hail in Ozaukee County
How often does it hail in Ozaukee County, Wisconsin?
71 hail reports have been logged in Ozaukee County since 1961. Over the 20 years 2006–2025 that averages 2.1 reports a year. That ranks #64 of 73 Wisconsin counties by number of reports.
When is hail season in Ozaukee County?
Most reports come in April, May, July. April alone accounts for 24% of all reports.
What is the largest hail recorded in Ozaukee County?
3.00 in (teacup size) on June 23, 2004 near Thiensville. 8% of reports here were 2 inches or larger.
When did it last hail in Ozaukee County?
The most recent report in this data is from May 7, 2024 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 5, 2026.
How many hail storms has Ozaukee County had in the last five years?
2 separate days with hail reports since November 5, 2021, adding up to 5 reports. The most recent was May 7, 2024.
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.