Hail history for Waukesha County, WI

Waukesha County has 260 recorded hail events in the NOAA Storm Events Database — 161 of them 1″ or larger and 15 at 2″ or larger. The largest on record: 3.75″ (softball) on August 2, 2015.

Records 1950–present Data through April 2026 Peak month May

Core sample · every recorded event, 1955–2026

Mark size = measured hail diameter; slivers are events with no recorded size. Amber ≥2″, red ≥2.75″ (baseball class). Denser recent decades partly reflect better reporting, not only more storms.

Recorded events 260 since 1957

1″ or larger 161 NWS severe threshold

2″ or larger 15 hen egg class and up

Largest recorded 3.75″ softball · August 2, 2015

Read the record honestly: Storm Events contains what was reported to the National Weather Service. Sparse or rural counties under-report, and coverage improved sharply after the mid-1990s — a quiet-looking stretch is not proof nothing fell.

When it hails in Waukesha County

Recorded events by month, 1950–present. The amber bar marks Waukesha County's peak: May.

Most recent recorded events

Latest 8 of 260 recorded events · data through April 2026
Date	Size	Comparable to
April 17, 2026	1.0″	Quarter
April 17, 2026	1.0″	Quarter
April 14, 2026	1.0″	Quarter
April 14, 2026	1.5″	Ping-pong ball
April 14, 2026	1.0″	Quarter
April 14, 2026	1.0″	Quarter
April 14, 2026	1.25″	Half dollar
April 14, 2026	1.25″	Half dollar

Looking for a specific storm? Use the did-it-hail date lookup for Waukesha County.

From the storm reports

Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).

April 14, 2026 · 2.0″ (hen egg)

Trained spotter reports 2 inch diameter hail northeast of Menomonee Falls.

August 2, 2015 · 3.75″ (softball)

The hail put holes in the roof of a camper and dented a truck.

June 7, 2008 · 3.0″ (tea cup)

Hail size ranged from 0.75 to 3.00 inches in diameter.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
1	1	7	12	16	70	58	95

The climb across decades is largely a reporting story: spotter networks, radar, and digital filing pulled far more storms into the record after the 1990s.

Questions about hail in Waukesha County

Has it ever hailed in Waukesha County?

Yes — 260 hail events have been recorded for Waukesha County, WI in the NOAA Storm Events Database since 1957, including 161 of 1″ (quarter size) or larger.

When did it last hail in Waukesha County?

The most recent recorded hail event for Waukesha County, WI is April 17, 2026, with 1.0″ (quarter) hail. The database is currently updated through April 2026, so a storm from the last few weeks may not appear yet. To check a specific day, use the did-it-hail date lookup.

What is the largest hail ever recorded in Waukesha County?

3.75″ (softball), recorded on August 2, 2015. Hail that size is destructive-class and typically damages roofs, vehicles, and siding. See how big that really is on the actual-size hail chart.

Does a recorded hail event mean my roof was damaged?

No. This page reports storm records, not damage. Hail size and damage vary block by block within a county, and only an inspection can establish what happened to a specific roof. If you suspect damage, talk to your insurer or a licensed roofer — they can pull the same NOAA records for your claim.

More Wisconsin hail history

All 72 Wisconsin counties, ranked by recorded hail →

Source: NOAA/NCEI Storm Events Database, public domain, updated monthly by NCEI — this site's copy runs through April 2026. HailHistory reports records; it does not give insurance advice or assess damage.