Hail history for Jefferson County, Illinois
Every NOAA hail report filed in Jefferson County since 1955, with preliminary National Weather Service reports to November 3, 2026.
Readout · Jefferson County
- Last hail
- Apr 27, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 6
- since Nov 3, 2021 · 7 reports
- Largest ever
- 3.50 in
- teacup · May 5, 1999
92 reports on 76 days since 1955 · #50 of 103 Illinois counties
Hail map · Jefferson County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Jefferson County
The latest hail report in Jefferson County is from April 27, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 6 separate hail days; the biggest stones in that time were 1.25 in on April 18, 2024.
Over the 20 years 2006–2025, Jefferson County logged 55 reports on 46 hail days, about 2.8 reports a year. That is about the same as the median Illinois county (2.6 a year) and ranks #50 of 103 Illinois counties for all-time reports. Jefferson County holds 1% of all 12,418 hail reports in Illinois.
7% 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 3.50 in (teacup) on May 5, 1999 near Mt Vernon.
Reports were down 63% in 2016–2025 (15) compared with 2006–2015 (40). The busiest year was 2008, with 9 reports on 7 days. Hail here peaks in April (35% of reports); 68% fall between April and June.
Reports a year 2006–2025 average
- Jefferson County 2.8
- Median Illinois county 2.6
Hail days 2006–2025
- Jefferson County 46
- Median Illinois county 34
Share 2 in or larger of sized reports
- Jefferson County 7%
- Median Illinois county 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | |||||||||||
| 2025 | 2 | 2 | |||||||||||
| 2024 | 1 | 1 | 1 | 3 | |||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 1 | 1 | |||||||||||
| 2018 | 1 | 1 | 2 | ||||||||||
| 2017 | 2 | 2 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Apr 27, 2026 | 1 | 1.00 in | — |
| Mar 30, 2025 | 2 | 1.00 in | — |
| Jul 29, 2024 | 1 | 0.88 in | — |
| Apr 18, 2024 | 1 | 1.25 in | — |
| Mar 14, 2024 | 1 | 1.00 in | — |
| May 7, 2023 | 1 | 0.75 in | — |
Largest hail on record
| Date | Size | Location | Damage | Time · source |
|---|---|---|---|---|
| May 5, 1999 | 3.50 inteacup | Mt Vernon | $50K | 13:10 local · NCEI |
| Apr 24, 2003 | 2.75 inbaseball | Mt Vernon | — | 16:55 local · NCEI |
| May 9, 2003 | 2.50 intennis ball | Ina | — | 18:00 local · NCEI |
| Apr 3, 1989 | 2.00 inhen egg | — | — | 15:05 local · NCEI |
| Apr 3, 1989 | 2.00 inhen egg | — | — | 14:50 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 41 45%
- 1–2 in 45 49%
- 2 in + 6 7%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Apr 27, 2026 | 1.00 inquarter | (Mvn)mt Vernon Arpt | 20:20 local · NCEI |
| Mar 30, 2025 | 1.00 inquarter | 2.1 N Bakerville | 15:15 local · NCEI |
| Mar 30, 2025 | 0.88 innickel | 0.69 N Dix | 13:58 local · NCEI |
| Jul 29, 2024 | 0.88 innickel | 1.43 SW Mt Vernon | 22:10 local · NCEI |
| Apr 18, 2024 | 1.25 inhalf dollar | Woodlawn | 18:41 local · NCEI |
| Mar 14, 2024 | 1.00 inquarter | 3 NNW Woodlawn | 18:30 local · NCEI |
| May 7, 2023 | 0.75 inpenny | 2 N Bonnie | 14:08 local · NCEI |
| May 6, 2021 | 1.00 inquarter | Dix | 15:07 local · NCEI |
| Mar 12, 2020 | 1.25 inhalf dollar | Ina | 12:48 local · NCEI |
| Jun 16, 2019 | 1.00 inquarter | 3 WSW Waltonville | 15:58 local · NCEI |
| Jun 15, 2018 | 1.50 inping pong ball | Mt Vernon | 17:16 local · NCEI |
| Apr 3, 2018 | 0.88 innickel | 1 W Woodlawn | 15:52 local · NCEI |
Cities and towns in Jefferson County
| Place | Reports | Largest |
|---|---|---|
| Mount Vernon | 37 | 3.50 in |
| Woodlawn | 12 | 1.75 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 |
|---|---|---|---|
| Ina | 8 | 8 | Mar 12, 2020 |
| Dix | 7 | 6 | Mar 30, 2025 |
| Bonnie | 5 | 5 | May 7, 2023 |
| Waltonville | 4 | 4 | Jun 16, 2019 |
| Bluford | 3 | 3 | Apr 27, 2011 |
| Opdyke | 3 | 2 | Jun 9, 2008 |
| Belle Rive | 1 | 1 | Nov 15, 1955 |
| Nason | 1 | 1 | Apr 24, 2003 |
Questions about hail in Jefferson County
How often does it hail in Jefferson County, Illinois?
92 hail reports have been logged in Jefferson County since 1955. Over the 20 years 2006–2025 that averages 2.8 reports a year. That ranks #50 of 103 Illinois counties by number of reports.
When is hail season in Jefferson County?
Most reports come in April, May, June. April alone accounts for 35% of all reports.
What is the largest hail recorded in Jefferson County?
3.50 in (teacup size) on May 5, 1999 near Mt Vernon. 7% of reports here were 2 inches or larger.
When did it last hail in Jefferson County?
The most recent report in this data is from April 27, 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 Jefferson County had in the last five years?
6 separate days with hail reports since November 3, 2021, adding up to 7 reports. The most recent was April 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.