Hail History

Hail history for Grimes, Iowa

NOAA hail reports in and within about 5 km (3 miles) of Grimes since 1964, with preliminary reports to November 3, 2026.

Readout · Grimes

Last hail
Sep 17, 2022
1.00 in, quarter size
Hail days, last 5 years
1
since Nov 3, 2021 · 1 report
Largest ever
2.00 in
hen egg · Jul 14, 2020

30 reports on 20 days since 1964 · #72 of 483 Iowa places

Hail map · Grimes

Grimes Urbandale Johnston Granger Windsor Heights Waukee Polk City West Des Moines Dallas Center 10 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
30 most recent reports with a location; Polk County is shaded. Open street map

For homeowners

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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 Grimes is from September 17, 2022. A local roofer can check and document it at no cost.

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What the record says about Grimes

The latest hail report in and around Grimes is from September 17, 2022, 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 September 17, 2022.

Over the 20 years 2006–2025, Grimes logged 18 reports on 11 hail days, about 0.9 reports a year. That is about twice the median Iowa town on this site (0.5 a year) and ranks #72 of 483 Iowa cities and towns on this site for all-time reports. Grimes accounts for 4% of the 677 reports filed in Polk County.

7% of reports with a size were 2 inches (hen egg) or larger, against 6% for the median Iowa town on this site. The largest hail on record here is 2.00 in (hen egg) on July 14, 2020 near 0.86 NE Grimes.

Reports were up 25% in 2016–2025 (10) compared with 2006–2015 (8). The busiest year was 2021, with 5 reports on 2 days. Hail here peaks in July (33% of reports); 50% fall between April and June.

Reports a year 2006–2025 average

  • Grimes 0.9
  • Polk County 19.9
  • Median Iowa town on this site 0.5

Hail days 2006–2025

  • Grimes 11
  • Polk County 102
  • Median Iowa town on this site 7

Share 2 in or larger of sized reports

  • Grimes 7%
  • Polk County 6%
  • Median Iowa town on this site 6%

Hail over time

0246 1964: 1 reports, largest 0.75 in 1970 1980 1990 1992: 1 reports, largest 1.50 in 1998: 2 reports, largest 1.00 in 2000: 1 reports, largest 1.00 in 2000 2001: 4 reports, largest 1.75 in 2002: 1 reports, largest 1.00 in 2004: 1 reports, largest 0.75 in 2005: 1 reports, largest 1.00 in 2006: 1 reports, largest 0.75 in 2009: 3 reports, largest 1.00 in 2010 2013: 3 reports, largest 1.75 in 2015: 1 reports, largest 0.75 in 2017: 1 reports, largest 1.00 in 2018: 1 reports, largest 1.00 in 2020: 2 reports, largest 2.00 in 2020 2021: 5 reports, largest 1.75 in 2022: 1 reports, largest 1.00 in
Reports per year, 1964–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
036912 Jan Feb March: 1 reports (3%) Mar April: 6 reports (20%) Apr May: 4 reports (13%) May June: 5 reports (17%) Jun July: 10 reports (33%) Jul August: 1 reports (3%) Aug September: 2 reports (7%) Sep Oct Nov December: 1 reports (3%) Dec
All 30 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 0
2024 0
2023 0
2022 1 1
2021 41 5
2020 2 2
2019 0
2018 1 1
2017 1 1

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Sep 17, 2022 1 1.00 in —

Largest hail on record

Largest hail reports in Grimes
Date Size Location County Damage Time · source
Jul 14, 2020 2.00 inhen egg 0.86 NE Grimes Polk — 18:45 local · NCEI
Jul 14, 2020 2.00 inhen egg 0.69 N Grimes Polk — 18:44 local · NCEI
Jul 9, 2021 1.75 ingolf ball 0.69 N Grimes Polk — 12:55 local · NCEI
May 19, 2013 1.75 ingolf ball 4.43 NNE Shuler Mine Dallas $15K 17:55 local · NCEI
Apr 8, 2001 1.75 ingolf ball Grimes Polk $20K 18:52 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Grimes
Date Size Location County Damage Time · source
Sep 17, 2022 1.00 inquarter 0.86 NE Grimes Polk — 18:58 local · NCEI
Jul 9, 2021 1.75 ingolf ball 0.69 N Grimes Polk — 12:55 local · NCEI
Jun 22, 2021 1.00 inquarter 1.38 N Grimes Polk — 16:33 local · NCEI
Jun 22, 2021 1.00 inquarter 0.52 E Grimes Polk — 16:30 local · NCEI
Jun 22, 2021 1.00 inquarter 1.38 N Grimes Polk — 16:25 local · NCEI
Jun 22, 2021 0.88 innickel 0.86 NE Grimes Polk — 16:22 local · NCEI
Jul 14, 2020 2.00 inhen egg 0.86 NE Grimes Polk — 18:45 local · NCEI
Jul 14, 2020 2.00 inhen egg 0.69 N Grimes Polk — 18:44 local · NCEI
Sep 1, 2018 1.00 inquarter 0.86 NE Grimes Polk — 18:05 local · NCEI
May 17, 2017 1.00 inquarter 1.38 N Grimes Polk — 14:10 local · NCEI
Jul 28, 2015 0.75 inpenny 0.69 N Grimes Polk — 18:38 local · NCEI
Jul 2, 2013 1.00 inquarter 0.69 S Grimes Polk $1K 14:52 local · NCEI

Hail history near Grimes

Questions about hail in Grimes

How often does it hail in Grimes, Iowa?

30 hail reports have been logged in and within about 5 km (3 miles) of Grimes since 1964. Over the 20 years 2006–2025 that averages 0.9 reports a year. That ranks #72 of 483 Iowa places by number of reports.

When is hail season in Grimes?

Most reports come in July, April, June. July alone accounts for 33% of all reports.

What is the largest hail recorded in Grimes?

2.00 in (hen egg size) on July 14, 2020 near 0.86 NE Grimes. 7% of reports here were 2 inches or larger.

When did it last hail in Grimes?

The most recent report in this data is from September 17, 2022 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Grimes 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 September 17, 2022.

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.