Hail history for Mason County, Illinois
Every NOAA hail report filed in Mason County since 1966, with preliminary National Weather Service reports to November 3, 2026.
Readout · Mason County
- Last hail
- May 4, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 6
- since Nov 3, 2021 · 11 reports
- Largest ever
- 2.75 in
- baseball · Aug 18, 2001
56 reports on 43 days since 1966 · #83 of 103 Illinois counties
Hail map · Mason 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 Mason County is from May 4, 2026. A local roofer can check and document it at no cost.
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What the record says about Mason County
The latest hail report in Mason County is from May 4, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 6 separate hail days; the biggest stones in that time were 1.75 in on March 31, 2026.
Over the 20 years 2006–2025, Mason County logged 17 reports on 12 hail days, about 0.8 reports a year. That is 33% of the median Illinois county (2.6 a year) and ranks #83 of 103 Illinois counties for all-time reports. Mason County holds 0% 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 2.75 in (baseball) on August 18, 2001 near Manito.
Reports were down 30% in 2016–2025 (7) compared with 2006–2015 (10). The busiest year was 2026, with 5 reports on 3 days. Hail here peaks in May (39% of reports); 71% fall between April and June.
Reports a year 2006–2025 average
- Mason County 0.8
- Median Illinois county 2.6
Hail days 2006–2025
- Mason County 12
- Median Illinois county 34
Share 2 in or larger of sized reports
- Mason 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 | 1 | 5 | |||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 1 | 4 | 5 | ||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| May 4, 2026 | 1 | 1.00 in | — |
| Mar 31, 2026 | 1 | 1.75 in | — |
| Feb 19, 2026 | 3 | 1.25 in | — |
| Mar 31, 2024 | 4 | 1.75 in | — |
| Feb 8, 2024 | 1 | 0.88 in | — |
| Apr 20, 2023 | 1 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 18, 2001 | 2.75 inbaseball | Manito | 11:16 local · NCEI |
| Dec 8, 1991 | 2.75 inbaseball | — | 14:15 local · NCEI |
| Apr 4, 2003 | 2.00 inhen egg | 2 S Saidora | 14:20 local · NCEI |
| Mar 31, 2026 | 1.75 ingolf ball | 1.73 WNW Easton | 08:27 local · NCEI |
| Mar 31, 2024 | 1.75 ingolf ball | 3 SW Mason City | 17:39 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 17 30%
- 1–2 in 36 64%
- 2 in + 3 5%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| May 4, 2026 | 1.00 inquarter | 1.26 ESE Patterson Bay | 21:30 local · NCEI |
| Mar 31, 2026 | 1.75 ingolf ball | 1.73 WNW Easton | 08:27 local · NCEI |
| Feb 19, 2026 | 0.75 inpenny | 0.87 NW Manito | 19:30 local · NCEI |
| Feb 19, 2026 | 1.25 inhalf dollar | 1.48 NNW Forest City | 19:25 local · NCEI |
| Feb 19, 2026 | 0.75 inpenny | 0.53 E Havana | 19:05 local · NCEI |
| Mar 31, 2024 | 1.25 inhalf dollar | Mason City | 17:45 local · NCEI |
| Mar 31, 2024 | 1.75 ingolf ball | 3 SW Mason City | 17:39 local · NCEI |
| Mar 31, 2024 | 1.00 inquarter | Easton | 17:34 local · NCEI |
| Mar 31, 2024 | 1.00 inquarter | Havana | 17:19 local · NCEI |
| Feb 8, 2024 | 0.88 innickel | Manito | 17:30 local · NCEI |
| Apr 20, 2023 | 1.25 inhalf dollar | 3.49 N Manito Waddell Arpt | 15:58 local · NCEI |
| May 22, 2019 | 1.75 ingolf ball | 8 E Havana | 21:45 local · NCEI |
Cities and towns in Mason 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 |
|---|---|---|---|
| Mason City | 6 | 5 | Mar 31, 2024 |
| Easton | 5 | 5 | Mar 31, 2026 |
| Bath | 4 | 3 | Jun 1, 1999 |
| Chandlerville | 3 | 3 | May 3, 2021 |
| Kilbourne | 2 | 2 | Apr 4, 2003 |
| Topeka | 2 | 2 | May 22, 2019 |
| Forest City | 1 | 1 | Feb 19, 2026 |
Questions about hail in Mason County
How often does it hail in Mason County, Illinois?
56 hail reports have been logged in Mason County since 1966. Over the 20 years 2006–2025 that averages 0.8 reports a year. That ranks #83 of 103 Illinois counties by number of reports.
When is hail season in Mason County?
Most reports come in May, April, June. May alone accounts for 39% of all reports.
What is the largest hail recorded in Mason County?
2.75 in (baseball size) on August 18, 2001 near Manito. 5% of reports here were 2 inches or larger.
When did it last hail in Mason County?
The most recent report in this data is from May 4, 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 Mason County had in the last five years?
6 separate days with hail reports since November 3, 2021, adding up to 11 reports. The most recent was May 4, 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.