Hail history for Grundy County, Illinois
Every NOAA hail report filed in Grundy County since 1980, with preliminary National Weather Service reports to November 3, 2026.
Readout · Grundy County
- Last hail
- Jul 27, 2026
- 1.50 in, ping pong ball size
- Hail days, last 5 years
- 3
- since Nov 3, 2021 · 4 reports
- Largest ever
- 2.75 in
- baseball · Jun 10, 2015
77 reports on 53 days since 1980 · #60 of 103 Illinois counties
Hail map · Grundy County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Grundy County is from July 27, 2026. A local roofer can check and document it at no cost.
Phone line opening soon
What the record says about Grundy County
The latest hail report in Grundy County is from July 27, 2026, 1.50 in (ping pong ball size). Since November 3, 2021 there have been 3 separate hail days; the biggest stones in that time were 1.50 in on July 27, 2026.
Over the 20 years 2006–2025, Grundy County logged 43 reports on 26 hail days, about 2.1 reports a year. That is 17% less than the median Illinois county (2.6 a year) and ranks #60 of 103 Illinois counties for all-time reports. Grundy County holds 1% of all 12,418 hail reports in Illinois.
1% of reports with a size were 2 inches (hen egg) or larger, against 5% for the median Illinois county. The largest hail on record here is 2.75 in (baseball) on June 10, 2015 near Minooka.
Reports were down 81% in 2016–2025 (7) compared with 2006–2015 (36). The busiest year was 2013, with 7 reports on 3 days. Hail here peaks in May (22% of reports); 53% fall between April and June.
Reports a year 2006–2025 average
- Grundy County 2.1
- Median Illinois county 2.6
Hail days 2006–2025
- Grundy County 26
- Median Illinois county 34
Share 2 in or larger of sized reports
- Grundy County 1%
- Median Illinois county 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2 | 2 | |||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 2 | 2 | |||||||||||
| 2019 | 2 | 1 | 3 | ||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jul 27, 2026 | 2 | 1.50 in | — |
| May 7, 2024 | 1 | 1.00 in | — |
| Apr 30, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| Jun 10, 2015 | 2.75 inbaseball | Minooka | — | 18:23 local · NCEI |
| Aug 10, 2020 | 1.75 ingolf ball | 1.1 NW Morris | — | 14:29 local · NCEI |
| Jun 10, 2015 | 1.75 ingolf ball | 0.86 NE Minooka | — | 18:16 local · NCEI |
| Apr 3, 2011 | 1.75 ingolf ball | 1 W Minooka | $100K | 22:06 local · NCEI |
| May 30, 2008 | 1.75 ingolf ball | 1.62 ESE Gorman | — | 17:49 local · NCEI |
Size of every report
- Under 1 in 28 37%
- 1–2 in 47 62%
- 2 in + 1 1%
- No size 1
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jul 27, 2026 | 1.50 inping pong ball | 0.66 S Minooka | 14:46 local · NCEI |
| Jul 27, 2026 | 1.00 inquarter | 1.04 W Coal City | 13:22 local · NCEI |
| May 7, 2024 | 1.00 inquarter | Channahon | 12:43 local · NCEI |
| Apr 30, 2022 | 1.00 inquarter | Mazon | 15:03 local · NCEI |
| Aug 10, 2020 | 1.75 ingolf ball | 1.1 NW Morris | 14:29 local · NCEI |
| Aug 10, 2020 | 1.00 inquarter | Morris | 14:27 local · NCEI |
| Jun 1, 2019 | 0.88 innickel | 1.38 S Minooka | 16:49 local · NCEI |
| Mar 14, 2019 | 0.75 inpenny | Morris | 10:50 local · NCEI |
| Mar 14, 2019 | 1.00 inquarter | 2 N Mazon | 10:40 local · NCEI |
| Jun 10, 2015 | 2.75 inbaseball | Minooka | 18:23 local · NCEI |
| Jun 10, 2015 | 1.75 ingolf ball | 0.86 NE Minooka | 18:16 local · NCEI |
| Jun 7, 2015 | 1.00 inquarter | 6.24 WSW Gardner | 14:48 local · NCEI |
Cities and towns in Grundy County
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Gardner | 3 | 3 | Jul 10, 2013 |
| Kinsman | 3 | 3 | May 29, 2011 |
| South Wilmington | 1 | 1 | Jul 10, 2013 |
| Verona | 1 | 1 | Mar 27, 1991 |
Questions about hail in Grundy County
How often does it hail in Grundy County, Illinois?
77 hail reports have been logged in Grundy County since 1980. Over the 20 years 2006–2025 that averages 2.1 reports a year. That ranks #60 of 103 Illinois counties by number of reports.
When is hail season in Grundy County?
Most reports come in May, June, July. May alone accounts for 22% of all reports.
What is the largest hail recorded in Grundy County?
2.75 in (baseball size) on June 10, 2015 near Minooka. 1% of reports here were 2 inches or larger.
When did it last hail in Grundy County?
The most recent report in this data is from July 27, 2026 (1.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Grundy County had in the last five years?
3 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was July 27, 2026.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.