Washington County was hit as recently as 2026-07-02, 29 days ago. Washington County has recorded hail in nearly every year on the archive. The largest stone on record here is 2.5 inches, a tennis ball and 2.5 times the National Weather Service's 1 inch severe criterion, reported on 2020-04-07 near Jackson.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Wisconsin. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-02, around Jackson. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Washington County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->NOAA's Storm Prediction Center has logged 25 separate hail days here since 2010 -- 1.5 a year over 17 years of record. Those days carry 61 separate reports between them, two or three on a typical one. 2 of those 17 years produced none at all. The busiest single year was 2017, with 3 hail days. The last five years track the long-run rate, with 7 days since 2022.
Most hail here stays under 2 inches: only 2 of the 25 days on record passed it, 8%, the last on 2020-04-07. They land in the same month as everything else, April. 7 of the 25 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Wisconsin, see the Wisconsin hail map and history.
Reports cluster nearest Hartford -- 10 of the county's 25 hail days -- then Jackson (5), West Bend (5), Germantown (4) and Slinger (4). That one town is named on 40% of them. Beyond those, NOAA names Allenton, Richfield, Newburg, Kewaskum and Hubertus on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Hartford | 5 | 1.75″ |
| West Bend | 4 | 2.00″ |
| Jackson | 4 | 1.75″ |
| Germantown | 3 | 1.75″ |
| 4 E Jackson | 2 | 2.50″ |
The season runs April through August: 20 of the 25 hail days on record fall in those 5 months (80%). April is the single busiest month, with 6 of them (24%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in February and September, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| February | 2 |
| April | 6 |
| May | 3 |
| June | 6 |
| July | 1 |
| August | 4 |
| September | 3 |
That day put 1 report on the map, the biggest 1 inch near Jackson. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-02 | 1.00″ | 1 |
| 2026-04-14 | 1.25″ | 5 |
| 2025-05-15 | 1.25″ | 4 |
| 2024-06-24 | 1.00″ | 1 |
| 2024-02-08 | 1.00″ | 1 |
| 2023-04-19 | 1.75″ | 6 |
| 2022-09-20 | 1.25″ | 2 |
| 2021-09-12 | 1.00″ | 1 |
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 2.5 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own: Waukesha County (33 hail days), Dodge County (30) and Milwaukee County (29). Every one of them takes more hail than Washington County.
Waukesha County · Dodge County · Milwaukee County
Back to the Wisconsin hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Washington County, Wisconsin only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.