Hail History

Hail history for Harvard, Illinois

NOAA hail reports in and within about 5 km (3 miles) of Harvard since 1991, with preliminary reports to November 3, 2026.

Readout · Harvard

Last hail
Apr 15, 2026
1.00 in, quarter size
Hail days, last 5 years
1
since Nov 3, 2021 · 1 report
Largest ever
1.75 in
golf ball · May 16, 1999

10 reports on 8 days since 1991 · #345 of 378 Illinois places

Hail map · Harvard

Harvard Woodstock Marengo McHenry Crystal Lake Huntley 5 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
10 most recent reports with a location; McHenry County is shaded. Open street map

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What the record says about Harvard

The latest hail report in and around Harvard is from April 15, 2026, 1.00 in (quarter size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 1.00 in on April 15, 2026.

Over the 20 years 2006–2025, Harvard logged 6 reports on 4 hail days, about 0.3 reports a year. That is 40% less than the median Illinois town on this site (0.5 a year) and ranks #345 of 378 Illinois cities and towns on this site for all-time reports. Harvard accounts for 5% 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 May 16, 1999 near Harvard.

The busiest year was 2011, with 3 reports on 1 day. Hail here peaks in March (40% of reports); 20% fall between April and June.

Reports a year 2006–2025 average

  • Harvard 0.3
  • McHenry County 7.2
  • Median Illinois town on this site 0.5

Hail days 2006–2025

  • Harvard 4
  • McHenry County 59
  • Median Illinois town on this site 8

Share 2 in or larger of sized reports

  • Harvard 0%
  • McHenry County 3%
  • Median Illinois town on this site 4%

Hail over time

0123 1991: 1 reports, largest 0.88 in 1995 1999: 1 reports, largest 1.75 in 2000 2001: 1 reports, largest 1.00 in 2005 2010 2011: 3 reports, largest 0.88 in 2013: 2 reports, largest 1.00 in 2015 2020 2021: 1 reports, largest 1.50 in 2025 2026: 1 reports, largest 1.00 in
Reports per year, 1991–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
01234 Jan Feb March: 4 reports (40%) Mar April: 1 reports (10%) Apr May: 1 reports (10%) May Jun Jul August: 1 reports (10%) Aug September: 1 reports (10%) Sep October: 2 reports (20%) Oct Nov Dec
All 10 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 1 1
2025 0
2024 0
2023 0
2022 0
2021 1 1
2020 0
2019 0
2018 0
2017 0

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Apr 15, 2026 1 1.00 in —

Largest hail on record

Largest hail reports in Harvard
Date Size Location County Time · source
May 16, 1999 1.75 ingolf ball Harvard Mchenry 17:45 local · NCEI
Sep 7, 2021 1.50 inping pong ball Harvard Mchenry 11:58 local · NCEI
Apr 15, 2026 1.00 inquarter 1.23 SE Big Foot Mchenry 02:06 local · NCEI
Aug 30, 2013 1.00 inquarter Harvard Mchenry 16:00 local · NCEI
Oct 23, 2001 1.00 inquarter 2 S Harvard Mchenry 23:15 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Harvard
Date Size Location County Time · source
Apr 15, 2026 1.00 inquarter 1.23 SE Big Foot Mchenry 02:06 local · NCEI
Sep 7, 2021 1.50 inping pong ball Harvard Mchenry 11:58 local · NCEI
Oct 5, 2013 0.75 inpenny Harvard Mchenry 12:35 local · NCEI
Aug 30, 2013 1.00 inquarter Harvard Mchenry 16:00 local · NCEI
Mar 20, 2011 0.88 innickel 0.36 ENE Harvard Mchenry 17:00 local · NCEI
Mar 20, 2011 0.75 inpenny Harvard Mchenry 13:54 local · NCEI
Mar 20, 2011 0.75 inpenny Harvard Mchenry 13:54 local · NCEI
Oct 23, 2001 1.00 inquarter 2 S Harvard Mchenry 23:15 local · NCEI
May 16, 1999 1.75 ingolf ball Harvard Mchenry 17:45 local · NCEI
Mar 27, 1991 0.88 innickel — Mchenry 14:20 local · NCEI

Hail history near Harvard

Questions about hail in Harvard

How often does it hail in Harvard, Illinois?

10 hail reports have been logged in and within about 5 km (3 miles) of Harvard since 1991. Over the 20 years 2006–2025 that averages 0.3 reports a year. That ranks #345 of 378 Illinois places by number of reports.

When is hail season in Harvard?

Most reports come in March, October, April. March alone accounts for 40% of all reports.

What is the largest hail recorded in Harvard?

1.75 in (golf ball size) on May 16, 1999 near Harvard. 0% of reports here were 2 inches or larger.

When did it last hail in Harvard?

The most recent report in this data is from April 15, 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 Harvard 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 April 15, 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.