Hail history for Monticello, Illinois
NOAA hail reports in and within about 5 km (3 miles) of Monticello since 1973, with preliminary reports to November 3, 2026.
Readout · Monticello
- Last hail
- Jun 29, 2023
- 1.75 in, golf ball size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 1 report
- Largest ever
- 2.75 in
- baseball · May 15, 2009
17 reports on 15 days since 1973 · #152 of 378 Illinois places
Hail map · Monticello
- 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 Monticello
The latest hail report in and around Monticello is from June 29, 2023, 1.75 in (golf ball size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.75 in on June 29, 2023.
Over the 20 years 2006–2025, Monticello logged 11 reports on 9 hail days, about 0.6 reports a year. That is 10% more than the median Illinois town on this site (0.5 a year) and ranks #152 of 378 Illinois cities and towns on this site for all-time reports. Monticello accounts for 30% of the 57 reports filed in Piatt County.
12% 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 2.75 in (baseball) on May 15, 2009 near 1.32 W Monticello.
Reports were down 43% in 2016–2025 (4) compared with 2006–2015 (7). The busiest year was 2016, with 3 reports on 2 days. Hail here peaks in May (47% of reports); 71% fall between April and June.
Reports a year 2006–2025 average
- Monticello 0.6
- Piatt County 1.5
- Median Illinois town on this site 0.5
Hail days 2006–2025
- Monticello 9
- Piatt County 20
- Median Illinois town on this site 8
Share 2 in or larger of sized reports
- Monticello 12%
- Piatt County 9%
- 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 | 0 | ||||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 29, 2023 | 1 | 1.75 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| May 15, 2009 | 2.75 inbaseball | 1.32 W Monticello | Piatt | $255K | 17:50 local · NCEI |
| May 11, 2016 | 2.00 inhen egg | 4 W Monticello | Piatt | — | 14:21 local · NCEI |
| Jun 29, 2023 | 1.75 ingolf ball | Monticello | Piatt | — | 05:15 local · NCEI |
| May 12, 2000 | 1.75 ingolf ball | Monticello | Piatt | — | 18:55 local · NCEI |
| May 15, 2009 | 1.25 inhalf dollar | Monticello | Piatt | — | 18:00 local · NCEI |
Size of every report
- Under 1 in 10 59%
- 1–2 in 5 29%
- 2 in + 2 12%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Jun 29, 2023 | 1.75 ingolf ball | Monticello | Piatt | — | 05:15 local · NCEI |
| May 11, 2016 | 0.88 innickel | Monticello | Piatt | — | 14:24 local · NCEI |
| May 11, 2016 | 2.00 inhen egg | 4 W Monticello | Piatt | — | 14:21 local · NCEI |
| Mar 31, 2016 | 0.75 inpenny | Monticello | Piatt | — | 12:23 local · NCEI |
| Apr 9, 2015 | 1.00 inquarter | Monticello | Piatt | — | 20:08 local · NCEI |
| Nov 14, 2011 | 0.75 inpenny | Monticello | Piatt | — | 13:30 local · NCEI |
| May 24, 2010 | 0.88 innickel | 2 NE Monticello | Piatt | — | 19:00 local · NCEI |
| May 30, 2009 | 1.00 inquarter | 3 NNE Monticello | Piatt | — | 19:15 local · NCEI |
| May 15, 2009 | 1.25 inhalf dollar | Monticello | Piatt | — | 18:00 local · NCEI |
| May 15, 2009 | 2.75 inbaseball | 1.32 W Monticello | Piatt | $255K | 17:50 local · NCEI |
| Apr 16, 2006 | 0.75 inpenny | Monticello | Piatt | — | 14:58 local · NCEI |
| Mar 19, 2003 | 0.75 inpenny | Monticello | Piatt | — | 15:50 local · NCEI |
Hail history near Monticello
Questions about hail in Monticello
How often does it hail in Monticello, Illinois?
17 hail reports have been logged in and within about 5 km (3 miles) of Monticello since 1973. Over the 20 years 2006–2025 that averages 0.6 reports a year. That ranks #152 of 378 Illinois places by number of reports.
When is hail season in Monticello?
Most reports come in May, April, March. May alone accounts for 47% of all reports.
What is the largest hail recorded in Monticello?
2.75 in (baseball size) on May 15, 2009 near 1.32 W Monticello. 12% of reports here were 2 inches or larger.
When did it last hail in Monticello?
The most recent report in this data is from June 29, 2023 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Monticello had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 1 reports. The most recent was June 29, 2023.
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.