Hail history for Hartley, Iowa
NOAA hail reports in and within about 5 km (3 miles) of Hartley since 1973, with preliminary reports to November 3, 2026.
Readout · Hartley
- Last hail
- Sep 16, 2025
- 1.75 in, golf ball size
- Hail days, last 5 years
- 4
- since Nov 3, 2021 · 4 reports
- Largest ever
- 2.50 in
- tennis ball · Jun 1, 2010
23 reports on 17 days since 1973 · #126 of 483 Iowa places
Hail map · Hartley
- 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 Hartley is from September 16, 2025. A local roofer can check and document it at no cost.
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What the record says about Hartley
The latest hail report in and around Hartley is from September 16, 2025, 1.75 in (golf ball size). Since November 3, 2021 there have been 4 separate hail days; the biggest stones in that time were 1.75 in on September 16, 2025.
Over the 20 years 2006–2025, Hartley logged 14 reports on 10 hail days, about 0.7 reports a year. That is 56% more than the median Iowa town on this site (0.5 a year) and ranks #126 of 483 Iowa cities and towns on this site for all-time reports. Hartley accounts for 11% of the 209 reports filed in O'Brien County.
4% 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 2.50 in (tennis ball) on June 1, 2010 near 2.05 NE Hartley Muni Arpt.
Reports were down 25% in 2016–2025 (6) compared with 2006–2015 (8). The busiest year was 2004, with 5 reports on 3 days. Hail here peaks in June (39% of reports); 70% fall between April and June.
Reports a year 2006–2025 average
- Hartley 0.7
- O'Brien County 4.3
- Median Iowa town on this site 0.5
Hail days 2006–2025
- Hartley 10
- O'Brien County 47
- Median Iowa town on this site 7
Share 2 in or larger of sized reports
- Hartley 4%
- O'Brien County 5%
- Median Iowa town on this site 6%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 1 | 1 | |||||||||||
| 2024 | 1 | 1 | |||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 1 | 1 | |||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 1 | 1 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Sep 16, 2025 | 1 | 1.75 in | — |
| Jun 15, 2024 | 1 | 0.88 in | — |
| Jul 13, 2023 | 1 | 1.50 in | — |
| May 30, 2022 | 1 | 1.25 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Jun 1, 2010 | 2.50 intennis ball | 2.05 NE Hartley Muni Arpt | O'brien | 12:51 local · NCEI |
| Sep 16, 2025 | 1.75 ingolf ball | 3.15 NNW Hartley | O'brien | 20:42 local · NCEI |
| Jun 4, 2020 | 1.75 ingolf ball | Hartley | O'brien | 22:27 local · NCEI |
| Jun 1, 2010 | 1.75 ingolf ball | Hartley | O'brien | 12:45 local · NCEI |
| May 6, 2009 | 1.75 ingolf ball | 2.05 NE Hartley | O'brien | 16:50 local · NCEI |
Size of every report
- Under 1 in 7 30%
- 1–2 in 15 65%
- 2 in + 1 4%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Sep 16, 2025 | 1.75 ingolf ball | 3.15 NNW Hartley | O'brien | 20:42 local · NCEI |
| Jun 15, 2024 | 0.88 innickel | 2.13 WNW Hartley | O'brien | 19:33 local · NCEI |
| Jul 13, 2023 | 1.50 inping pong ball | 2.49 N Hartley | O'brien | 19:52 local · NCEI |
| May 30, 2022 | 1.25 inhalf dollar | Hartley | O'brien | 15:15 local · NCEI |
| Jun 4, 2020 | 1.75 ingolf ball | Hartley | O'brien | 22:27 local · NCEI |
| Aug 18, 2017 | 1.00 inquarter | 2.02 W Hartley | O'brien | 19:41 local · NCEI |
| Jun 14, 2013 | 0.88 innickel | Hartley | O'brien | 20:45 local · NCEI |
| Jun 14, 2013 | 1.50 inping pong ball | 0.5 W Hartley | O'brien | 20:40 local · NCEI |
| Jun 14, 2013 | 1.50 inping pong ball | 2.57 SW Hartley Muni Arpt | O'brien | 20:20 local · NCEI |
| Jun 14, 2013 | 0.88 innickel | 0.69 N Hartley | O'brien | 14:50 local · NCEI |
| Sep 22, 2010 | 1.00 inquarter | Hartley | O'brien | 16:40 local · NCEI |
| Jun 1, 2010 | 2.50 intennis ball | 2.05 NE Hartley Muni Arpt | O'brien | 12:51 local · NCEI |
Hail history near Hartley
Questions about hail in Hartley
How often does it hail in Hartley, Iowa?
23 hail reports have been logged in and within about 5 km (3 miles) of Hartley since 1973. Over the 20 years 2006–2025 that averages 0.7 reports a year. That ranks #126 of 483 Iowa places by number of reports.
When is hail season in Hartley?
Most reports come in June, May, August. June alone accounts for 39% of all reports.
What is the largest hail recorded in Hartley?
2.50 in (tennis ball size) on June 1, 2010 near 2.05 NE Hartley Muni Arpt. 4% of reports here were 2 inches or larger.
When did it last hail in Hartley?
The most recent report in this data is from September 16, 2025 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Hartley had in the last five years?
4 separate days with hail reports since November 3, 2021, adding up to 4 reports. The most recent was September 16, 2025.
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.