Hail history for Windsor, Illinois
NOAA hail reports in and within about 5 km (3 miles) of Windsor since 1974, with preliminary reports to November 3, 2026.
Readout · Windsor
- Last hail
- Mar 10, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 3 reports
- Largest ever
- 2.00 in
- hen egg · Jun 14, 1974
14 reports on 10 days since 1974 · #214 of 378 Illinois places
Hail map · Windsor
- 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 Windsor
The latest hail report in and around Windsor is from March 10, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.00 in on March 10, 2026.
Over the 20 years 2006–2025, Windsor logged 5 reports on 5 hail days, about 0.3 reports a year. That is about half the median Illinois town on this site (0.5 a year) and ranks #214 of 378 Illinois cities and towns on this site for all-time reports. Windsor accounts for 15% of the 96 reports filed in Mercer County.
7% of reports with a size were 2 inches (hen egg) or larger, against 4% for the median Illinois town on this site. The largest hail on record here is 2.00 in (hen egg) on June 14, 1974.
The busiest year was 2003, with 3 reports on 1 day. Hail here peaks in April (50% of reports); 71% fall between April and June.
Reports a year 2006–2025 average
- Windsor 0.3
- Mercer County 2.3
- Median Illinois town on this site 0.5
Hail days 2006–2025
- Windsor 5
- Mercer County 28
- Median Illinois town on this site 8
Share 2 in or larger of sized reports
- Windsor 7%
- Mercer County 4%
- Median Illinois town on this site 4%
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 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Mar 10, 2026 | 2 | 1.00 in | — |
| Apr 16, 2024 | 1 | 0.88 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jun 14, 1974 | 2.00 inhen egg | — | Mercer | — | 15:40 local · NCEI |
| Apr 30, 2003 | 1.75 ingolf ball | New Windsor | Mercer | $500K | 19:04 local · NCEI |
| Apr 30, 2003 | 1.75 ingolf ball | 2 N New Windsor | Mercer | $50K | 18:18 local · NCEI |
| Apr 13, 1981 | 1.75 ingolf ball | — | Mercer | — | 18:35 local · NCEI |
| Mar 10, 2026 | 1.00 inquarter | 3.19 WSW Opheim | Henry | — | 19:42 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 7 50%
- 1–2 in 6 43%
- 2 in + 1 7%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Mar 10, 2026 | 1.00 inquarter | 3.19 WSW Opheim | Henry | — | 19:42 local · NCEI |
| Mar 10, 2026 | 1.00 inquarter | 3.19 WSW Opheim | Henry | — | 17:33 local · NCEI |
| Apr 16, 2024 | 0.88 innickel | 3.19 WSW Opheim | Henry | — | 18:53 local · NCEI |
| Feb 28, 2017 | 0.75 inpenny | 2.19 WSW Alpha | Henry | — | 15:52 local · NCEI |
| Apr 17, 2013 | 0.75 inpenny | 3.12 W Alpha | Henry | — | 12:44 local · NCEI |
| Jul 21, 2008 | 0.88 innickel | 1.56 E Griffin | Mercer | — | 05:10 local · NCEI |
| Apr 13, 2006 | 1.00 inquarter | New Windsor | Mercer | $5K | 21:08 local · NCEI |
| May 20, 2004 | 0.75 inpenny | 2 S New Windsor | Mercer | — | 19:45 local · NCEI |
| May 20, 2004 | 0.75 inpenny | New Windsor | Mercer | — | 19:44 local · NCEI |
| Apr 30, 2003 | 0.75 inpenny | New Windsor | Mercer | — | 20:55 local · NCEI |
| Apr 30, 2003 | 1.75 ingolf ball | New Windsor | Mercer | $500K | 19:04 local · NCEI |
| Apr 30, 2003 | 1.75 ingolf ball | 2 N New Windsor | Mercer | $50K | 18:18 local · NCEI |
Hail history near Windsor
- Orion 18 km · 11
- Cambridge 23 km · 23
- Aledo 25 km · 15
- Coal Valley 26 km · 21
- Galesburg 29 km · 37
- Moline 31 km · 41
- Rock Island 32 km · 24
- Colona 32 km · 10
Questions about hail in Windsor
How often does it hail in Windsor, Illinois?
14 hail reports have been logged in and within about 5 km (3 miles) of Windsor since 1974. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #214 of 378 Illinois places by number of reports.
When is hail season in Windsor?
Most reports come in April, March, May. April alone accounts for 50% of all reports.
What is the largest hail recorded in Windsor?
2.00 in (hen egg size) on June 14, 1974. 7% of reports here were 2 inches or larger.
When did it last hail in Windsor?
The most recent report in this data is from March 10, 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 Windsor had in the last five years?
2 separate days with hail reports since November 3, 2021, adding up to 3 reports. The most recent was March 10, 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.