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Hail in Cook County, Illinois
643 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.
NCEI records 643 hail events in Cook County, Illinois, between 1950 and 2026, spread over 68 years.
April is the busiest month, with 135 of the recorded events. The last 20 years account for 376 events against 203 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 5.2% of the 12,331 hail events recorded in Illinois; its 68.0 per 100 square miles compares with 22.2 statewide.
93 of the hail reports with a recorded size were golf-ball size (1.75 inches) or larger; the largest recorded stone was 2.75 inches (baseball size).
Compared with Illinois
| Measure | Cook County | Illinois | US |
|---|---|---|---|
| Hail events since 1950 | 643 | 12,331 | 424,356 |
| Per 100 square miles | 68.0 | 22.2 | 12.0 |
| Per 10,000 residents | 1.2 | 9.7 | 12.8 |
| Deaths recorded | 0 | 0 | 29 |
| Busiest month | April | May | May |
By year
Seasonality
4Feb
21Mar
50Apr
135May
112Jun
117Jul
70Aug
74Sep
18Oct
35Nov
6Dec
1
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
The 200 events kept for this page are the 120 most recent plus the 80 with the most damage, deaths or injuries out of 643. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 14 Apr 2026 | Hail | 1.00 in | — | — | — | — | County |
| 14 Apr 2026 | Hail | 1.00 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 1.25 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 2.00 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 30 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 26 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 26 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 26 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 10 Mar 2026 | Hail | 1.25 in | — | — | — | — | County |
| 10 Mar 2026 | Hail | 2.00 in | — | — | — | — | County |
| 10 Mar 2026 | Hail | 1.50 in | — | — | — | — | County |
| 10 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 10 Mar 2026 | Hail | 1.00 in | — | — | — | — | County |
| 21 Sep 2025 | Hail | 1.25 in | — | — | — | — | County |
| 16 Aug 2025 | Hail | 1.25 in | — | — | — | — | County |
| 16 Aug 2025 | Hail | 1.00 in | — | — | — | — | County |
| 16 Aug 2025 | Hail | 1.00 in | — | — | — | — | County |
| 16 Aug 2025 | Hail | 1.00 in | — | — | — | — | County |
| 16 Aug 2025 | Hail | 1.00 in | — | — | — | — | County |
| 16 Aug 2025 | Hail | 1.25 in | — | — | — | — | County |
| 15 May 2025 | Hail | 1.25 in | — | — | — | — | County |
| 15 May 2025 | Hail | 1.25 in | — | — | — | — | County |
| 15 May 2025 | Hail | 1.00 in | — | — | — | — | County |
| 19 Mar 2025 | Hail | 1.00 in | — | — | — | — | County |
| 19 Mar 2025 | Hail | 1.00 in | — | — | — | — | County |
| 19 Mar 2025 | Hail | 1.00 in | — | — | — | — | County |
| 27 Aug 2024 | Hail | 1.00 in | — | — | — | — | County |
| 5 Aug 2024 | Hail | 1.00 in | — | — | — | — | County |
| 20 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 2.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.75 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.25 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.50 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.25 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.50 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.25 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.25 in | — | — | — | — | County |
| 7 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 2 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 4 Mar 2024 | Hail | 1.00 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.50 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.00 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.25 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.00 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.50 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.75 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.50 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 2.00 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.00 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.00 in | — | — | — | — | County |
| 27 Feb 2024 | Hail | 1.00 in | — | — | — | — | County |
| 8 Feb 2024 | Hail | 1.00 in | — | — | — | — | County |
| 29 Jun 2023 | Hail | 1.00 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.75 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.25 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.25 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.50 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 20 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.75 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.50 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.25 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.75 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.75 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.50 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.75 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.50 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.75 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.50 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.25 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.25 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.25 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.25 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.00 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.50 in | — | — | — | — | County |
| 4 Apr 2023 | Hail | 1.50 in | — | — | — | — | County |
| 31 Mar 2023 | Hail | 1.00 in | — | — | — | — | County |
| 22 Jul 2022 | Hail | 1.00 in | — | — | — | — | County |
| 13 Jun 2022 | Hail | 1.00 in | — | — | — | — | County |
| 13 Jun 2022 | Hail | 1.00 in | — | — | — | — | County |
| 13 Jun 2022 | Hail | 1.00 in | — | — | — | — | County |
| 13 Jun 2022 | Hail | 1.00 in | — | — | — | — | County |
| 22 Feb 2022 | Hail | 0.88 in | — | — | — | — | County |
| 24 Aug 2021 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2021 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2020 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2020 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2020 | Hail | 1.00 in | — | — | — | — | County |
| 23 Aug 2020 | Hail | 1.25 in | — | — | — | — | County |
| 10 Aug 2020 | Hail | 0.88 in | — | — | — | — | County |
| 7 Jul 2020 | Hail | 1.00 in | — | — | — | — | County |
| 22 Jun 2020 | Hail | 1.00 in | — | — | — | — | County |
| 10 Jun 2020 | Hail | 2.00 in | — | — | — | — | County |
| 13 Jul 2015 | Hail | 2.50 in | $100K | — | — | — | County |
| 1 Aug 2014 | Hail | 1.00 in | — | — | — | — | County |
| 11 May 2014 | Hail | 1.00 in | — | — | — | — | County |
| 12 Apr 2014 | Hail | 2.00 in | — | — | — | — | County |
| 12 Apr 2014 | Hail | 1.00 in | — | — | — | — | County |
| 12 Apr 2014 | Hail | 1.00 in | — | — | — | — | County |
| 12 Apr 2014 | Hail | 1.00 in | — | — | — | — | County |
| 17 Nov 2013 | Hail | 1.00 in | — | — | — | — | County |
| 17 Nov 2013 | Hail | 0.75 in | — | — | — | — | County |
| 17 Nov 2013 | Hail | 1.00 in | — | — | — | — | County |
| 17 Nov 2013 | Hail | 1.00 in | — | — | — | — | County |
| 3 Oct 2013 | Hail | 0.88 in | — | — | — | — | County |
| 18 Sep 2013 | Hail | 1.00 in | — | — | — | — | County |
| 30 Aug 2013 | Hail | 1.00 in | — | — | — | — | County |
| 30 Aug 2013 | Hail | 0.75 in | — | — | — | — | County |
| 30 Aug 2013 | Hail | 1.00 in | — | — | — | — | County |
| 12 Aug 2013 | Hail | 0.75 in | — | — | — | — | County |
| 27 Jun 2013 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2013 | Hail | 0.75 in | — | — | — | — | County |
| 12 Jun 2013 | Hail | 0.75 in | — | — | — | — | County |
| 12 Jun 2013 | Hail | 0.88 in | — | — | — | — | County |
| 12 Jun 2013 | Hail | 1.75 in | — | — | — | — | County |
| 12 Jun 2013 | Hail | 1.00 in | — | — | — | — | County |
| 30 May 2013 | Hail | 0.75 in | — | — | — | — | County |
| 30 May 2013 | Hail | 1.25 in | — | — | — | — | County |
| 17 Apr 2013 | Hail | 0.75 in | — | — | — | — | County |
| 28 Jan 2013 | Hail | 0.88 in | — | — | — | — | County |
| 28 Jan 2013 | Hail | 1.00 in | — | — | — | — | County |
| 28 Jan 2013 | Hail | 0.75 in | — | — | — | — | County |
| 28 Jan 2013 | Hail | 0.75 in | — | — | — | — | County |
| 14 Oct 2012 | Hail | 1.00 in | — | — | — | — | County |
| 4 Aug 2012 | Hail | 1.00 in | — | — | — | — | County |
| 1 Jul 2012 | Hail | 0.75 in | — | — | — | — | County |
| 1 Jul 2012 | Hail | 1.00 in | — | — | — | — | County |
| 29 Jun 2012 | Hail | 1.00 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.00 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.75 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.25 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.75 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.75 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 0.88 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.75 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.00 in | — | — | — | — | County |
| 28 Jun 2012 | Hail | 1.00 in | — | — | — | — | County |
| 6 May 2012 | Hail | 0.88 in | — | — | — | — | County |
| 6 May 2012 | Hail | 0.88 in | — | — | — | — | County |
| 3 May 2012 | Hail | 1.25 in | — | — | — | — | County |
| 3 May 2012 | Hail | 1.25 in | — | — | — | — | County |
| 3 May 2012 | Hail | 1.00 in | — | — | — | — | County |
| 3 May 2012 | Hail | 0.88 in | — | — | — | — | County |
| 3 May 2012 | Hail | 0.75 in | — | — | — | — | County |
| 3 May 2012 | Hail | 1.00 in | — | — | — | — | County |
| 3 May 2012 | Hail | 1.75 in | — | — | — | — | County |
| 3 May 2012 | Hail | 1.00 in | — | — | — | — | County |
| 3 May 2012 | Hail | 1.00 in | — | — | — | — | County |
| 3 May 2012 | Hail | 0.88 in | — | — | — | — | County |
| 3 Sep 2011 | Hail | 1.00 in | — | — | — | — | County |
| 3 Sep 2011 | Hail | 1.00 in | — | — | — | — | County |
| 13 Aug 2011 | Hail | 1.00 in | — | — | — | — | County |
| 13 Aug 2011 | Hail | 0.75 in | — | — | — | — | County |
| 13 Aug 2011 | Hail | 1.00 in | — | — | — | — | County |
| 13 Aug 2011 | Hail | 0.75 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 2.00 in | $17M | — | — | — | County |
| 30 Jun 2011 | Hail | 2.75 in | $750K | — | — | — | County |
| 30 Jun 2011 | Hail | 0.88 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 1.50 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 1.25 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 2.00 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 1.00 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 2.00 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 1.50 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 1.75 in | — | — | — | — | County |
| 30 Jun 2011 | Hail | 2.00 in | — | — | — | — | County |
| 4 Jun 2011 | Hail | 1.00 in | — | — | — | — | County |
| 5 Apr 2010 | Hail | 1.50 in | $868K | — | — | — | County |
| 5 Apr 2010 | Hail | 1.25 in | $50K | — | — | — | County |
| 5 Apr 2010 | Hail | 2.75 in | $5K | — | — | — | County |
| 22 Mar 2007 | Hail | 1.75 in | $50K | — | — | — | County |
| 28 Jun 2006 | Hail | 1.00 in | $15K | — | — | — | County |
| 29 May 2006 | Hail | 1.75 in | $1K | — | — | — | County |
Questions and answers
How many hail events has Cook County had?
643 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 Cook County?
14 Apr 2026 (Hail, 1.00 in). Records reach NCEI about 120 days after the month ends.
What was the most damaging hail event recorded in Cook County?
The hail of 30 Jun 2011, with property damage estimated by NCEI at $17M.
How does Cook County compare with Illinois for hail?
68.0 events per 100 square miles against 22.2 statewide; the county holds 643 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.