Hail history for Warren County, Illinois
Every NOAA hail report filed in Warren County since 1958, with preliminary National Weather Service reports to November 3, 2026.
Readout · Warren County
- Last hail
- Aug 15, 2024
- 1.00 in, quarter size
- Hail days, last 5 years
- 6
- since Nov 3, 2021 · 7 reports
- Largest ever
- 1.75 in
- golf ball · May 24, 2024
75 reports on 57 days since 1958 · #63 of 103 Illinois counties
Hail map · Warren 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 Warren County
The latest hail report in Warren County is from August 15, 2024, 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 May 24, 2024.
Over the 20 years 2006–2025, Warren County logged 57 reports on 39 hail days, about 2.9 reports a year. That is about the same as the median Illinois county (2.6 a year) and ranks #63 of 103 Illinois counties for all-time reports. Warren County holds 1% of all 12,418 hail reports in Illinois.
0% 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 1.75 in (golf ball) on May 24, 2024 near Roseville.
Reports were down 57% in 2016–2025 (17) compared with 2006–2015 (40). The busiest year was 2006, with 10 reports on 6 days. Hail here peaks in May (28% of reports); 67% fall between April and June.
Reports a year 2006–2025 average
- Warren County 2.9
- Median Illinois county 2.6
Hail days 2006–2025
- Warren County 39
- Median Illinois county 34
Share 2 in or larger of sized reports
- Warren County 0%
- Median Illinois county 5%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 3 | 1 | 4 | ||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 2 | 1 | 3 | ||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 2 | 1 | 3 | ||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 | 1 | 2 | 5 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 15, 2024 | 1 | 1.00 in | — |
| May 24, 2024 | 2 | 1.75 in | — |
| May 2, 2024 | 1 | 0.75 in | — |
| Jun 12, 2022 | 1 | 1.00 in | — |
| May 26, 2022 | 1 | 1.00 in | — |
| May 13, 2022 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| May 24, 2024 | 1.75 ingolf ball | Roseville | 10:20 local · NCEI |
| Apr 8, 2020 | 1.75 ingolf ball | Coldbrook | 15:00 local · NCEI |
| Mar 19, 2017 | 1.75 ingolf ball | 1.56 E Gerlaw | 23:45 local · NCEI |
| Mar 15, 2016 | 1.75 ingolf ball | 5.43 SE Greenbush | 17:40 local · NCEI |
| May 11, 2014 | 1.75 ingolf ball | 0.87 SW Monmouth | 15:28 local · NCEI |
Size of every report
- Under 1 in 32 43%
- 1–2 in 43 57%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Aug 15, 2024 | 1.00 inquarter | 2.14 NNE Roseville | 21:38 local · NCEI |
| May 24, 2024 | 1.00 inquarter | 0.52 E Roseville | 10:20 local · NCEI |
| May 24, 2024 | 1.75 ingolf ball | Roseville | 10:20 local · NCEI |
| May 2, 2024 | 0.75 inpenny | 1.05 W Swan Creek | 14:56 local · NCEI |
| Jun 12, 2022 | 1.00 inquarter | 0.52 E Roseville | 06:09 local · NCEI |
| May 26, 2022 | 1.00 inquarter | 0.87 SW Monmouth | 11:16 local · NCEI |
| May 13, 2022 | 1.00 inquarter | 1.48 SSW Swan Creek | 16:35 local · NCEI |
| May 14, 2020 | 1.00 inquarter | Roseville | 20:13 local · NCEI |
| Apr 8, 2020 | 1.75 ingolf ball | Coldbrook | 15:00 local · NCEI |
| Apr 7, 2020 | 1.25 inhalf dollar | 0.69 S Alexis | 21:45 local · NCEI |
| Oct 14, 2017 | 1.25 inhalf dollar | Monmouth Muni Arpt | 16:50 local · NCEI |
| Oct 14, 2017 | 1.00 inquarter | 0.87 SW Monmouth | 16:48 local · NCEI |
Cities and towns in Warren 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 |
|---|---|---|---|
| Kirkwood | 5 | 4 | May 11, 2014 |
| Cameron | 3 | 3 | Aug 18, 2017 |
| Little York | 3 | 3 | Jun 1, 2009 |
Questions about hail in Warren County
How often does it hail in Warren County, Illinois?
75 hail reports have been logged in Warren County since 1958. Over the 20 years 2006–2025 that averages 2.9 reports a year. That ranks #63 of 103 Illinois counties by number of reports.
When is hail season in Warren County?
Most reports come in May, April, June. May alone accounts for 28% of all reports.
What is the largest hail recorded in Warren County?
1.75 in (golf ball size) on May 24, 2024 near Roseville. 0% of reports here were 2 inches or larger.
When did it last hail in Warren County?
The most recent report in this data is from August 15, 2024 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Warren 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 August 15, 2024.
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.