Hail history for Carroll County, Illinois
Every NOAA hail report filed in Carroll County since 1960, with preliminary National Weather Service reports to November 3, 2026.
Readout · Carroll County
- Last hail
- Aug 21, 2026
- 1.00 in, quarter size · preliminary
- Hail days, last 5 years
- 7
- since Nov 3, 2021 · 12 reports
- Largest ever
- 3.00 in
- teacup · Apr 2, 2026
76 reports on 55 days since 1960 · #61 of 103 Illinois counties
Hail map · Carroll 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 Carroll County is from August 21, 2026. A local roofer can check and document it at no cost.
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What the record says about Carroll County
The latest hail report in Carroll County is from August 21, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 7 separate hail days; the biggest stones in that time were 3.00 in on April 2, 2026.
Over the 20 years 2006–2025, Carroll County logged 34 reports on 21 hail days, about 1.7 reports a year. That is 35% less than the median Illinois county (2.6 a year) and ranks #61 of 103 Illinois counties for all-time reports. Carroll County holds 1% of all 12,418 hail reports in Illinois.
5% 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 3.00 in (teacup) on April 2, 2026 near 2.14 NNW Thomson.
Reports held about level in 2016–2025 (16) compared with 2006–2015 (18). The busiest year was 2018, with 7 reports on 2 days. Hail here peaks in April (26% of reports); 64% fall between April and June.
Reports a year 2006–2025 average
- Carroll County 1.7
- Median Illinois county 2.6
Hail days 2006–2025
- Carroll County 21
- Median Illinois county 34
Share 2 in or larger of sized reports
- Carroll County 5%
- Median Illinois county 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 3 | 1 | 4 | ||||||||||
| 2025 | 2 | 2 | |||||||||||
| 2024 | 2 | 2 | |||||||||||
| 2023 | 3 | 3 | |||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 6 | 1 | 7 | ||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 21, 2026 | 1 | 1.00 in | View |
| Apr 2, 2026 | 3 | 3.00 in | — |
| Jul 10, 2025 | 2 | 1.25 in | — |
| Mar 4, 2024 | 2 | 1.00 in | — |
| Apr 20, 2023 | 1 | 0.88 in | — |
| Apr 4, 2023 | 2 | 1.25 in | — |
| Aug 19, 2022 | 1 | 0.88 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Apr 2, 2026 | 3.00 inteacup | 2.14 NNW Thomson | 16:37 local · NCEI |
| Jul 26, 1978 | 3.00 inteacup | — | 09:40 local · NCEI |
| Aug 19, 1979 | 2.50 intennis ball | — | 17:45 local · NCEI |
| May 2, 2018 | 2.00 inhen egg | 5.08 NNE Hitt | 16:54 local · NCEI |
| Apr 2, 2026 | 1.75 ingolf ball | 1.38 N Thomson | 16:38 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 34 45%
- 1–2 in 38 50%
- 2 in + 4 5%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 21, 2026 | 1.00 inquarter | 1 WNW Savanna | 23:49 UTC · NWS prelim. |
| Apr 2, 2026 | 1.50 inping pong ball | Mt Carroll | 16:48 local · NCEI |
| Apr 2, 2026 | 1.75 ingolf ball | 1.38 N Thomson | 16:38 local · NCEI |
| Apr 2, 2026 | 3.00 inteacup | 2.14 NNW Thomson | 16:37 local · NCEI |
| Jul 10, 2025 | 1.00 inquarter | 2.07 N Wacker | 18:40 local · NCEI |
| Jul 10, 2025 | 1.25 inhalf dollar | 1.54 E Savanna | 18:25 local · NCEI |
| Mar 4, 2024 | 1.00 inquarter | Lanark | 14:45 local · NCEI |
| Mar 4, 2024 | 1.00 inquarter | 5.05 ENE Marcus | 13:20 local · NCEI |
| Apr 20, 2023 | 0.88 innickel | Mt Carroll | 14:41 local · NCEI |
| Apr 4, 2023 | 1.00 inquarter | 0.69 S Milledgeville | 10:35 local · NCEI |
| Apr 4, 2023 | 1.25 inhalf dollar | Milledgeville | 10:35 local · NCEI |
| Aug 19, 2022 | 0.88 innickel | Lanark | 18:36 local · NCEI |
Cities and towns in Carroll County
| Place | Reports | Largest |
|---|---|---|
| Mount Carroll | 16 | 1.75 in |
| Savanna | 13 | 2.50 in |
| Thomson | 13 | 3.00 in |
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 |
|---|---|---|---|
| Lanark | 9 | 8 | Mar 4, 2024 |
| Milledgeville | 6 | 5 | Apr 4, 2023 |
| Chadwick | 3 | 3 | Jun 19, 2009 |
| Lake Carroll | 3 | 2 | Aug 13, 2011 |
| Shannon | 3 | 3 | May 11, 2014 |
| Danforth | 2 | 2 | Oct 18, 2007 |
Questions about hail in Carroll County
How often does it hail in Carroll County, Illinois?
76 hail reports have been logged in Carroll County since 1960. Over the 20 years 2006–2025 that averages 1.7 reports a year. That ranks #61 of 103 Illinois counties by number of reports.
When is hail season in Carroll County?
Most reports come in April, June, May. April alone accounts for 26% of all reports.
What is the largest hail recorded in Carroll County?
3.00 in (teacup size) on April 2, 2026 near 2.14 NNW Thomson. 5% of reports here were 2 inches or larger.
When did it last hail in Carroll County?
The most recent report in this data is from August 21, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Carroll County had in the last five years?
7 separate days with hail reports since November 3, 2021, adding up to 12 reports. The most recent was August 21, 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.