Hail history for Piatt County, IL

Piatt County has 57 recorded hail events in the NOAA Storm Events Database — 30 of them 1″ or larger and 5 at 2″ or larger. The largest on record: 4.0″ (softball) on August 26, 2000.

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 57 since 1972

1″ or larger 30 NWS severe threshold

2″ or larger 5 hen egg class and up

Largest recorded 4.0″ softball · August 26, 2000

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 Piatt County

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

Most recent recorded events

Latest 8 of 57 recorded events · data through April 2026
Date	Size	Comparable to
November 18, 2025	1.0″	Quarter
May 20, 2025	1.0″	Quarter
June 29, 2023	1.75″	Golf ball
June 29, 2023	1.0″	Quarter
June 29, 2023	1.0″	Quarter
April 30, 2022	1.0″	Quarter
May 28, 2019	2.5″	Tennis ball
May 9, 2018	1.0″	Quarter

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

From the storm reports

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

May 9, 2018 · 1.0″ (quarter)

A storm produced hail that destroyed 80 acres of young soybeans about 3 miles north of Cisco.

May 15, 2009 · 2.75″ (baseball)

Large hail damaged siding, gutters, roofs, and windows to numerous homes in the Long Grove subdivision west of Monticello. Hail up to 2.75 inches in diameter was also reported on the east side of Monticello, where several cars were damaged.

August 26, 2000 · 4.0″ (softball)

A supercell developed over northern Piatt County and moved to the south southeast . In Bement, one inch hail fell. As the storm approached the Milmine area, the hail grew in size. Four inch hail was reported in this area. Several vehicles in this area received hail damage. No injuries were reported.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	0	3	6	7	22	13	6

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 Piatt County

Has it ever hailed in Piatt County?

Yes — 57 hail events have been recorded for Piatt County, IL in the NOAA Storm Events Database since 1972, including 30 of 1″ (quarter size) or larger.

When did it last hail in Piatt County?

The most recent recorded hail event for Piatt County, IL is November 18, 2025, 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 Piatt County?

4.0″ (softball), recorded on August 26, 2000. 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 Illinois hail history

All 102 Illinois 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.