Hail history for Waukesha County, Wisconsin
Every NOAA hail report filed in Waukesha County since 1957, with preliminary National Weather Service reports to November 3, 2026.
Readout · Waukesha County
- Last hail
- Aug 9, 2026
- 1.00 in, quarter size · preliminary
- Hail days, last 5 years
- 20
- since Nov 3, 2021 · 89 reports
- Largest ever
- 3.75 in
- teacup · Aug 2, 2015
265 reports on 116 days since 1957 · #2 of 73 Wisconsin counties
Hail map · Waukesha 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 Waukesha County
The latest hail report in Waukesha County is from August 9, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 20 separate hail days; the biggest stones in that time were 2.50 in on July 27, 2026.
Over the 20 years 2006–2025, Waukesha County logged 179 reports on 67 hail days, about 8.9 reports a year. That is 2.6 times the median Wisconsin county (3.5 a year) and ranks #2 of 73 Wisconsin counties for all-time reports. Waukesha County holds 3% of all 9,358 hail reports in Wisconsin.
6% 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 3.75 in (teacup) on August 2, 2015 near 2.05 NW Mukwonago.
Reports were up 21% in 2016–2025 (98) compared with 2006–2015 (81). The busiest year was 2025, with 30 reports on 3 days. Hail here peaks in May (25% of reports); 58% fall between April and June.
Reports a year 2006–2025 average
- Waukesha County 8.9
- Median Wisconsin county 3.5
Hail days 2006–2025
- Waukesha County 67
- Median Wisconsin county 37
Share 2 in or larger of sized reports
- Waukesha County 6%
- Median Wisconsin county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 9 | 4 | 1 | 14 | |||||||||
| 2025 | 15 | 13 | 2 | 30 | |||||||||
| 2024 | 8 | 8 | 3 | 19 | |||||||||
| 2023 | 1 | 2 | 1 | 1 | 5 | ||||||||
| 2022 | 1 | 17 | 3 | 21 | |||||||||
| 2021 | 7 | 7 | |||||||||||
| 2020 | 1 | 3 | 4 | ||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 3 | 3 | |||||||||||
| 2017 | 2 | 1 | 5 | 8 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 9, 2026 | 1 | 1.00 in | View |
| Jul 27, 2026 | 4 | 2.50 in | — |
| Apr 17, 2026 | 2 | 1.00 in | — |
| Apr 14, 2026 | 7 | 2.00 in | — |
| Sep 22, 2025 | 2 | 0.75 in | — |
| May 15, 2025 | 13 | 2.00 in | — |
| Apr 18, 2025 | 15 | 2.00 in | — |
| Jun 25, 2024 | 3 | 1.25 in | — |
| May 13, 2024 | 2 | 0.75 in | — |
| May 7, 2024 | 6 | 1.00 in | — |
| Feb 27, 2024 | 1 | 0.88 in | — |
| Feb 8, 2024 | 7 | 1.50 in | — |
| Aug 24, 2023 | 1 | 0.75 in | — |
| Jul 28, 2023 | 1 | 1.25 in | — |
| May 31, 2023 | 2 | 1.00 in | — |
| Apr 19, 2023 | 1 | 1.00 in | — |
| Sep 20, 2022 | 3 | 1.50 in | — |
| Jun 13, 2022 | 8 | 1.75 in | — |
| Jun 10, 2022 | 9 | 1.75 in | — |
| Apr 22, 2022 | 1 | 0.88 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Aug 2, 2015 | 3.75 inteacup | 2.05 NW Mukwonago | $3K | 19:02 local · NCEI |
| Jun 7, 2008 | 3.00 inteacup | 2 SSW Hartland | — | 15:50 local · NCEI |
| Apr 13, 2006 | 2.75 inbaseball | Menomonee Falls | $4.4 million | 21:33 local · NCEI |
| Jul 27, 2026 | 2.50 intennis ball | 1.66 WSW Oconomowoc | — | 10:21 local · NCEI |
| Aug 2, 2015 | 2.50 intennis ball | 0.86 SE Muskego | — | 19:18 local · NCEI |
Size of every report
- Under 1 in 99 37%
- 1–2 in 149 56%
- 2 in + 17 6%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 9, 2026 | 1.00 inquarter | 1 SW Mukwonago | 04:35 UTC · NWS prelim. |
| Jul 27, 2026 | 1.00 inquarter | 0.86 SE Delafield | 10:29 local · NCEI |
| Jul 27, 2026 | 2.50 intennis ball | 1.66 WSW Oconomowoc | 10:21 local · NCEI |
| Jul 27, 2026 | 2.00 inhen egg | 0.86 SW Oconomowoc | 10:17 local · NCEI |
| Jul 27, 2026 | 1.75 ingolf ball | 0.86 SE Lac La Belle | 10:14 local · NCEI |
| Apr 17, 2026 | 1.00 inquarter | 2.07 S Eagle | 18:25 local · NCEI |
| Apr 17, 2026 | 1.00 inquarter | Eagle | 18:12 local · NCEI |
| Apr 14, 2026 | 1.00 inquarter | 0.69 S Menomonee Falls | 17:47 local · NCEI |
| Apr 14, 2026 | 1.50 inping pong ball | 0.5 E Merton | 17:46 local · NCEI |
| Apr 14, 2026 | 2.00 inhen egg | 1.01 W Menomonee Falls | 17:38 local · NCEI |
| Apr 14, 2026 | 1.25 inhalf dollar | 1.51 W Menomonee Falls | 17:38 local · NCEI |
| Apr 14, 2026 | 1.25 inhalf dollar | 4.09 E Monches | 17:34 local · NCEI |
Cities and towns in Waukesha County
| Place | Reports | Largest |
|---|---|---|
| Oconomowoc | 38 | 2.50 in |
| Waukesha | 26 | 1.75 in |
| Mukwonago | 18 | 2.00 in |
| Summit | 17 | 1.50 in |
| Brookfield | 16 | 1.75 in |
| Menomonee Falls | 16 | 2.75 in |
| New Berlin | 16 | 1.50 in |
| Vernon | 12 | 3.75 in |
| Muskego | 11 | 2.50 in |
| Delafield | 10 | 3.00 in |
| Eagle | 10 | 1.50 in |
| Hartland | 10 | 2.00 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 |
|---|---|---|---|
| Waukesha | 9 | 6 | Apr 18, 2025 |
| Lisbon | 8 | 8 | Apr 14, 2026 |
| Merton | 7 | 7 | Apr 14, 2026 |
| North Prairie | 7 | 5 | Apr 18, 2025 |
| Pewaukee | 7 | 7 | Aug 14, 2015 |
| Wales | 7 | 6 | May 15, 2025 |
| Big Bend | 4 | 4 | May 15, 2025 |
| Lac La Belle | 4 | 4 | Jul 27, 2026 |
| North Lake | 3 | 3 | Feb 8, 2024 |
| Okauchee Lake | 3 | 3 | Jul 15, 2017 |
| Nashotah | 2 | 2 | May 15, 2025 |
| Pewaukee | 2 | 2 | May 7, 2024 |
| Sussex | 2 | 2 | May 7, 2024 |
| Chenequa | 1 | 1 | May 1, 2012 |
| Elm Grove | 1 | 1 | Jul 9, 2006 |
| Oconomowoc Lake | 1 | 1 | Jun 10, 2022 |
Questions about hail in Waukesha County
How often does it hail in Waukesha County, Wisconsin?
265 hail reports have been logged in Waukesha County since 1957. Over the 20 years 2006–2025 that averages 8.9 reports a year. That ranks #2 of 73 Wisconsin counties by number of reports.
When is hail season in Waukesha County?
Most reports come in May, June, April. May alone accounts for 25% of all reports.
What is the largest hail recorded in Waukesha County?
3.75 in (teacup size) on August 2, 2015 near 2.05 NW Mukwonago. 6% of reports here were 2 inches or larger.
When did it last hail in Waukesha County?
The most recent report in this data is from August 9, 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 Waukesha County had in the last five years?
20 separate days with hail reports since November 3, 2021, adding up to 89 reports. The most recent was August 9, 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.