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Hail in Williamson County, Illinois
120 hail events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Hail.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Williamson County, Illinois, has 120 hail events in the NCEI record since 1950, with at least one in 30 different years.
May is the busiest month, with 36 of the recorded events. The last 20 years account for 77 events against 41 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1% of the 12,331 hail events recorded in Illinois; its 28.6 per 100 square miles compares with 22.2 statewide.
21 of the hail reports with a recorded size were golf-ball size (1.75 inches) or larger; the largest recorded stone was 3.00 inches (tea cup size).
Compared with Illinois
| Measure | Williamson County | Illinois | US |
|---|---|---|---|
| Hail events since 1950 | 120 | 12,331 | 424,356 |
| Per 100 square miles | 28.6 | 22.2 | 12.0 |
| Per 10,000 residents | 17.9 | 9.7 | 12.8 |
| Deaths recorded | 0 | 0 | 29 |
| Busiest month | May | May | May |
By year
Seasonality
4Feb
4Mar
18Apr
26May
36Jun
17Jul
7Aug
2Sep
3Oct
1Nov
2Dec
0
Magnitude distribution
NWS hail-size descriptors
- under 1 in
- pea to quarter
- 1–1.74 in
- quarter to golf ball
- 1.75–2.74 in
- golf ball to baseball
- 2.75–3.99 in
- baseball to softball
- 4 in and larger
- softball and larger
Hail size in inches as recorded by NCEI; events without a size are not binned.
Recorded events
All 120 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 20 May 2025 | Hail | 0.88 in | — | — | — | — | County |
| 16 May 2025 | Hail | 1.25 in | — | — | — | — | County |
| 16 May 2025 | Hail | 0.88 in | — | — | — | — | County |
| 16 May 2025 | Hail | 1.75 in | — | — | — | — | County |
| 1 May 2025 | Hail | 1.00 in | — | — | — | — | County |
| 1 May 2025 | Hail | 1.00 in | — | — | — | — | County |
| 1 May 2025 | Hail | 0.88 in | — | — | — | — | County |
| 30 Mar 2025 | Hail | 0.88 in | — | — | — | — | County |
| 30 Mar 2025 | Hail | 1.50 in | — | — | — | — | County |
| 26 May 2024 | Hail | 2.00 in | — | — | — | — | County |
| 23 May 2024 | Hail | 0.75 in | — | — | — | — | County |
| 8 May 2024 | Hail | 1.75 in | — | — | — | — | County |
| 8 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 2 Apr 2024 | Hail | 1.00 in | — | — | — | — | County |
| 2 Jul 2023 | Hail | 1.25 in | — | — | — | — | County |
| 30 Jun 2023 | Hail | 2.75 in | — | — | — | — | County |
| 30 Jun 2023 | Hail | 3.00 in | $10M | — | — | — | County |
| 30 Jun 2023 | Hail | 2.75 in | — | — | — | — | County |
| 29 Jun 2023 | Hail | 1.10 in | — | — | — | — | County |
| 7 May 2023 | Hail | 0.75 in | — | — | — | — | County |
| 15 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 15 Apr 2023 | Hail | 0.75 in | — | — | — | — | County |
| 6 May 2021 | Hail | 1.00 in | — | — | — | — | County |
| 8 Apr 2020 | Hail | 1.00 in | — | — | — | — | County |
| 12 Mar 2020 | Hail | 1.00 in | — | — | — | — | County |
| 12 Mar 2020 | Hail | 2.00 in | — | — | — | — | County |
| 12 Mar 2020 | Hail | 1.25 in | — | — | — | — | County |
| 12 Mar 2020 | Hail | 0.88 in | — | — | — | — | County |
| 21 May 2019 | Hail | 0.75 in | — | — | — | — | County |
| 9 Mar 2019 | Hail | 1.00 in | — | — | — | — | County |
| 31 May 2018 | Hail | 0.75 in | — | — | — | — | County |
| 20 May 2018 | Hail | 0.88 in | — | — | — | — | County |
| 3 Apr 2018 | Hail | 0.75 in | — | — | — | — | County |
| 2 Apr 2018 | Hail | 0.75 in | — | — | — | — | County |
| 18 Nov 2017 | Hail | 0.75 in | — | — | — | — | County |
| 4 Sep 2017 | Hail | 0.75 in | — | — | — | — | County |
| 16 Apr 2017 | Hail | 0.75 in | — | — | — | — | County |
| 5 Apr 2017 | Hail | 0.75 in | — | — | — | — | County |
| 1 Mar 2017 | Hail | 0.75 in | — | — | — | — | County |
| 28 Feb 2017 | Hail | 3.00 in | — | — | — | — | County |
| 26 May 2016 | Hail | 0.88 in | — | — | — | — | County |
| 26 May 2016 | Hail | 1.00 in | — | — | — | — | County |
| 11 May 2016 | Hail | 0.88 in | — | — | — | — | County |
| 11 May 2016 | Hail | 1.00 in | — | — | — | — | County |
| 27 Mar 2016 | Hail | 0.75 in | — | — | — | — | County |
| 1 Mar 2016 | Hail | 0.88 in | — | — | — | — | County |
| 9 Apr 2015 | Hail | 1.00 in | — | — | — | — | County |
| 2 Apr 2015 | Hail | 0.75 in | — | — | — | — | County |
| 27 May 2014 | Hail | 0.75 in | — | — | — | — | County |
| 27 Apr 2014 | Hail | 0.75 in | — | — | — | — | County |
| 2 Jul 2012 | Hail | 1.00 in | — | — | — | — | County |
| 2 Jul 2012 | Hail | 0.75 in | — | — | — | — | County |
| 1 Jul 2012 | Hail | 1.00 in | — | — | — | — | County |
| 17 Mar 2012 | Hail | 0.75 in | — | — | — | — | County |
| 15 Mar 2012 | Hail | 1.00 in | — | — | — | — | County |
| 15 Mar 2012 | Hail | 1.00 in | — | — | — | — | County |
| 2 Mar 2012 | Hail | 0.75 in | — | — | — | — | County |
| 29 Feb 2012 | Hail | 0.75 in | — | — | — | — | County |
| 17 Jun 2011 | Hail | 0.88 in | — | — | — | — | County |
| 15 Apr 2011 | Hail | 1.00 in | — | — | — | — | County |
| 15 Apr 2011 | Hail | 1.00 in | — | — | — | — | County |
| 15 Apr 2011 | Hail | 0.88 in | — | — | — | — | County |
| 15 Apr 2011 | Hail | 1.00 in | — | — | — | — | County |
| 11 Jul 2010 | Hail | 1.75 in | — | — | — | — | County |
| 8 Jun 2009 | Hail | 0.88 in | — | — | — | — | County |
| 8 Jun 2009 | Hail | 1.00 in | — | — | — | — | County |
| 14 May 2009 | Hail | 1.00 in | — | — | — | — | County |
| 8 May 2009 | Hail | 1.75 in | — | — | — | — | County |
| 7 May 2009 | Hail | 1.75 in | — | — | — | — | County |
| 7 May 2009 | Hail | 2.00 in | — | — | — | — | County |
| 2 Apr 2009 | Hail | 0.75 in | — | — | — | — | County |
| 23 Jun 2008 | Hail | 0.75 in | — | — | — | — | County |
| 31 May 2008 | Hail | 1.00 in | — | — | — | — | County |
| 29 Jan 2008 | Hail | 0.88 in | — | — | — | — | County |
| 3 Apr 2007 | Hail | 1.25 in | — | — | — | — | County |
| 3 Apr 2007 | Hail | 0.88 in | — | — | — | — | County |
| 30 Mar 2007 | Hail | 0.88 in | — | — | — | — | County |
| 10 Nov 2006 | Hail | 0.75 in | — | — | — | — | County |
| 22 Sep 2006 | Hail | 0.88 in | — | — | — | — | County |
| 22 Sep 2006 | Hail | 1.00 in | — | — | — | — | County |
| 10 Aug 2006 | Hail | 0.75 in | — | — | — | — | County |
| 22 Apr 2006 | Hail | 0.88 in | — | — | — | — | County |
| 11 Mar 2006 | Hail | 1.25 in | — | — | — | — | County |
| 22 Apr 2005 | Hail | 0.75 in | — | — | — | — | County |
| 12 Apr 2005 | Hail | 1.00 in | — | — | — | — | County |
| 18 Oct 2004 | Hail | 1.75 in | — | — | — | — | County |
| 6 Jul 2004 | Hail | 0.75 in | — | — | — | — | County |
| 1 Jun 2004 | Hail | 0.88 in | — | — | — | — | County |
| 1 Jun 2004 | Hail | 0.75 in | — | — | — | — | County |
| 26 May 2004 | Hail | 1.00 in | — | — | — | — | County |
| 26 May 2004 | Hail | 1.75 in | — | — | — | — | County |
| 26 May 2004 | Hail | 1.00 in | — | — | — | — | County |
| 20 Mar 2004 | Hail | 0.75 in | — | — | — | — | County |
| 25 May 2002 | Hail | 1.75 in | $300K | — | — | — | County |
| 12 May 2002 | Hail | 0.88 in | — | — | — | — | County |
| 2 May 2002 | Hail | 2.00 in | $2.0M | — | — | — | County |
| 28 Apr 2002 | Hail | 0.75 in | — | — | — | — | County |
| 18 Aug 2001 | Hail | 0.75 in | — | — | — | — | County |
| 3 Jul 2001 | Hail | 0.75 in | — | — | — | — | County |
| 7 Apr 2000 | Hail | 1.00 in | — | — | — | — | County |
| 7 Apr 2000 | Hail | 1.00 in | — | — | — | — | County |
| 26 Mar 2000 | Hail | 0.88 in | — | — | — | — | County |
| 17 May 1999 | Hail | 0.75 in | — | — | — | — | County |
| 5 May 1999 | Hail | 2.75 in | $50K | — | — | — | County |
| 27 Feb 1999 | Hail | 0.75 in | — | — | — | — | County |
| 21 Jan 1999 | Hail | 1.00 in | — | — | — | — | County |
| 21 Jan 1999 | Hail | 0.88 in | — | — | — | — | County |
| 21 Jan 1999 | Hail | 1.00 in | — | — | — | — | County |
| 13 Jun 1997 | Hail | 0.75 in | — | — | — | — | County |
| 6 Jun 1997 | Hail | 1.00 in | — | — | — | — | County |
| 21 Apr 1996 | Hail | 1.75 in | — | — | — | — | County |
| 19 Apr 1996 | Hail | 0.75 in | — | — | — | — | County |
| 27 Feb 1996 | Hail | 0.75 in | — | — | — | — | County |
| 23 Jun 1995 | Hail | 1.75 in | — | — | — | — | County |
| 9 Jun 1995 | Hail | 0.75 in | — | — | — | — | County |
| 24 Jun 1992 | Hail | 0.75 in | — | — | — | — | County |
| 24 Jun 1992 | Hail | 1.75 in | — | — | — | — | County |
| 24 Jun 1992 | Hail | 1.00 in | — | — | — | — | County |
| 14 May 1986 | Hail | 0.75 in | — | — | — | — | County |
| 7 May 1971 | Hail | 1.75 in | — | — | — | — | County |
Questions and answers
How many hail events has Williamson County had?
120 events in the NCEI Storm Events record between 1950 and 2026. Reporting of hail became far more complete after 1996, so early decades undercount.
When was the last recorded hail event in Williamson County?
20 May 2025 (Hail, 0.88 in). Records reach NCEI about 120 days after the month ends.
What was the most damaging hail event recorded in Williamson County?
The hail of 30 Jun 2023, with property damage estimated by NCEI at $10M.
How does Williamson County compare with Illinois for hail?
28.6 events per 100 square miles against 22.2 statewide; the county holds 120 of the state's 12,331 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Hail hub and the county page.