Hail history for Marengo, Illinois
NOAA hail reports in and within about 5 km (3 miles) of Marengo since 1973, with preliminary reports to November 3, 2026.
Readout · Marengo
- Last hail
- Aug 27, 2024
- 1.75 in, golf ball size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 2 reports
- Largest ever
- 1.75 in
- golf ball · Aug 27, 2024
27 reports on 26 days since 1973 · #67 of 378 Illinois places
Hail map · Marengo
- 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 Marengo is from August 27, 2024. A local roofer can check and document it at no cost.
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What the record says about Marengo
The latest hail report in and around Marengo is from August 27, 2024, 1.75 in (golf ball size). Since November 3, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.75 in on August 27, 2024.
Over the 20 years 2006–2025, Marengo logged 20 reports on 19 hail days, about 1.0 reports a year. That is about twice the median Illinois town on this site (0.5 a year) and ranks #67 of 378 Illinois cities and towns on this site for all-time reports. Marengo accounts for 14% of the 196 reports filed in McHenry County.
0% 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 1.75 in (golf ball) on August 27, 2024 near 4.15 N Marengo.
Reports were down 82% in 2016–2025 (3) compared with 2006–2015 (17). The busiest year was 2014, with 5 reports on 4 days. Hail here peaks in May (26% of reports); 67% fall between April and June.
Reports a year 2006–2025 average
- Marengo 1.0
- McHenry County 7.2
- Median Illinois town on this site 0.5
Hail days 2006–2025
- Marengo 19
- McHenry County 59
- Median Illinois town on this site 8
Share 2 in or larger of sized reports
- Marengo 0%
- McHenry County 3%
- 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 | 1 | 1 | |||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 27, 2024 | 1 | 1.75 in | — |
| Jun 29, 2023 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Aug 27, 2024 | 1.75 ingolf ball | 4.15 N Marengo | Mchenry | — | 16:13 local · NCEI |
| Jun 19, 2009 | 1.75 ingolf ball | Marengo | Mchenry | — | 07:40 local · NCEI |
| May 11, 1987 | 1.75 ingolf ball | — | Mchenry | — | 15:40 local · NCEI |
| Jul 13, 2015 | 1.50 inping pong ball | 2.91 NW Marengo | Mchenry | — | 20:45 local · NCEI |
| Oct 2, 2006 | 1.50 inping pong ball | Marengo | Mchenry | $75K | 19:50 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 12 44%
- 1–2 in 15 56%
- 2 in + 0 0%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Aug 27, 2024 | 1.75 ingolf ball | 4.15 N Marengo | Mchenry | 16:13 local · NCEI |
| Jun 29, 2023 | 1.00 inquarter | 3.58 W Marengo | Mchenry | 03:10 local · NCEI |
| Apr 7, 2020 | 1.00 inquarter | 4 NE Marengo | Mchenry | 17:59 local · NCEI |
| Jul 13, 2015 | 1.50 inping pong ball | 2.91 NW Marengo | Mchenry | 20:45 local · NCEI |
| Jun 8, 2015 | 0.88 innickel | Marengo | Mchenry | 13:50 local · NCEI |
| Apr 9, 2015 | 1.00 inquarter | 1.74 N Union | Mchenry | 19:08 local · NCEI |
| Apr 8, 2015 | 1.00 inquarter | 3.25 NNE Marengo | Mchenry | 23:04 local · NCEI |
| May 20, 2014 | 0.88 innickel | Marengo | Mchenry | 18:15 local · NCEI |
| May 12, 2014 | 1.00 inquarter | Marengo | Mchenry | 19:00 local · NCEI |
| May 11, 2014 | 0.88 innickel | 1.81 SSW Franklinville | Mchenry | 15:51 local · NCEI |
| May 11, 2014 | 1.25 inhalf dollar | Marengo | Mchenry | 15:40 local · NCEI |
| Apr 12, 2014 | 1.00 inquarter | Marengo | Mchenry | 09:42 local · NCEI |
Hail history near Marengo
- Woodstock 15 km · 28
- Huntley 16 km · 22
- Harvard 20 km · 10
- Crystal Lake 22 km · 27
- Poplar Grove 23 km · 11
- Belvidere 24 km · 35
- Lake in the Hills 24 km · 18
- McHenry 27 km · 14
Questions about hail in Marengo
How often does it hail in Marengo, Illinois?
27 hail reports have been logged in and within about 5 km (3 miles) of Marengo since 1973. Over the 20 years 2006–2025 that averages 1.0 reports a year. That ranks #67 of 378 Illinois places by number of reports.
When is hail season in Marengo?
Most reports come in May, June, April. May alone accounts for 26% of all reports.
What is the largest hail recorded in Marengo?
1.75 in (golf ball size) on August 27, 2024 near 4.15 N Marengo. 0% of reports here were 2 inches or larger.
When did it last hail in Marengo?
The most recent report in this data is from August 27, 2024 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Marengo had in the last five years?
2 separate days with hail reports since November 3, 2021, adding up to 2 reports. The most recent was August 27, 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.