NOAA Storm Events files dated September 18, 2026; newest event June 2, 2026. Events are added after the fact, so the current year is always incomplete.
What The Hail Record Shows
Key insight, October 11, 2026: the three counties average 7.1 hail days a year, and no full year since 2010 has had fewer than 2. 2025 was the heaviest year by days and reports: 12 hail days, 97 reports and a stone of 3 inches. The largest stone in the whole record was 4 inches at Round Rock, Williamson County, on September 24, 2023. The heaviest single date was September 24, 2023, with 63 reports from 2 counties.
- 581 hail reports, 2010 to 2026
- 76 of them (13%) at 2 inches or larger
- 7.1 hail days a year on average across the three counties, 2010 to 2025
- 2 to 12 hail days in the quietest and busiest full years
Hail By Year
A report is one observation sent to the National Weather Service; one storm produces many. Hail days count distinct calendar dates with a report anywhere in the three counties, which is the number to read.
| Year | Hail days | Reports | Reports 2 inches or larger | Largest stone (inches) |
|---|---|---|---|---|
| 2010 | 2 | 5 | 0 | 1 |
| 2011 | 10 | 32 | 0 | 1.75 |
| 2012 | 7 | 15 | 0 | 1.75 |
| 2013 | 8 | 36 | 0 | 1.75 |
| 2014 | 5 | 45 | 1 | 2 |
| 2015 | 5 | 15 | 2 | 2 |
| 2016 | 6 | 10 | 0 | 1.75 |
| 2017 | 10 | 31 | 0 | 1.75 |
| 2018 | 5 | 9 | 0 | 1.25 |
| 2019 | 6 | 18 | 1 | 2 |
| 2020 | 4 | 27 | 4 | 2.75 |
| 2021 | 9 | 40 | 10 | 2.5 |
| 2022 | 7 | 15 | 0 | 1.75 |
| 2023 | 11 | 112 | 26 | 4 |
| 2024 | 7 | 59 | 19 | 4 |
| 2025 | 12 | 97 | 13 | 3 |
| 2026 (incomplete) | 7 | 15 | 0 | 1 |
Which County Gets The Most Hail Days?
Travis leads the average and Hays trails. The table counts a day once per county, so one storm shows up in every county it crossed. Average days are for the full years 2010 to 2025; totals run to June 2, 2026.
| County | Average hail days a year | Hail days in total | Reports | Largest stone (inches) |
|---|---|---|---|---|
| Travis | 3.9 | 64 | 233 | 3 |
| Williamson | 3.9 | 67 | 249 | 4 |
| Hays | 2.5 | 41 | 99 | 3 |
Travis County Hail By Month
Reports by calendar month for Travis County, 2010 to 2026.
| Month | Reports |
|---|---|
| January | 3 |
| February | 2 |
| March | 49 |
| April | 69 |
| May | 65 |
| June | 9 |
| July | 0 |
| August | 0 |
| September | 33 |
| October | 0 |
| November | 1 |
| December | 2 |
The Heaviest Hail Days Across The Three Counties
Ranked by the number of reports on one date, anywhere in the three counties.
| Date | Reports | Largest stone (inches) | Counties reporting |
|---|---|---|---|
| September 24, 2023 | 63 | 4 | Travis, Williamson |
| April 9, 2024 | 28 | 2.5 | Hays, Travis, Williamson |
| May 16, 2025 | 21 | 3 | Williamson |
| March 28, 2014 | 20 | 1.75 | Travis, Williamson |
| April 22, 2025 | 19 | 2.5 | Williamson |
| April 28, 2023 | 18 | 1.75 | Travis, Williamson |
| March 23, 2025 | 18 | 1.25 | Hays, Travis, Williamson |
| May 9, 2024 | 16 | 3 | Hays, Williamson |
The Largest Stones On Record
| Date | Stone (inches) | County | Place reported |
|---|---|---|---|
| September 24, 2023 | 4 | Williamson | Round Rock |
| May 30, 2024 | 4 | Williamson | Coupland |
| September 24, 2023 | 3.75 | Williamson | Round Rock |
| September 24, 2023 | 3.5 | Williamson | Round Rock |
| September 24, 2023 | 3.5 | Williamson | Round Rock |
| September 24, 2023 | 3 | Williamson | Old Round Rock |
| September 24, 2023 | 3 | Williamson | Round Rock |
| September 24, 2023 | 3 | Travis | Pflugerville |
What The Numbers Do Not Say
A hail report is an observation, not a damage claim. The file holds no loss amounts, no roof ages and no insurance outcomes, so it cannot tell you whether a given storm damaged a given roof. It also says nothing about the quality of any roofer. Reports follow where people and spotters are, so a quiet county can mean fewer observers. In 8 of 16 full years at least one stone of 2 inches or more was reported in the three counties.
What This Means For Your Roof
Inspect after the storm day your address was under, not after a knock on the door. The hail claim calculator weighs a deductible against a repair estimate, and our chapter 707 guide covers what Texas expects of a homeowner and a contractor on the deductible. The permit guide says what the city's own pages do and do not settle about roofing permits, and the permit index shows 1,632 building permits naming roof work in the last 36 months.
How To Read This Data
Source: NOAA National Centers for Environmental Information, Storm Events Database, the yearly details files, filtered to Texas, event type Hail and the three counties above. Stone size is the diameter in inches as reported to the National Weather Service. The dates at the top of the page are NOAA's own. Download every report as CSV, open, no email gate.
Frequently Asked Questions
- How often does it hail in Austin?
- NOAA logged hail reports somewhere in Travis, Williamson and Hays counties on an average of 7.1 distinct days a year from 2010 to 2025. The quietest year was 2010 with 2 days and the busiest was 2025 with 12.
- Which county gets the most hail days?
- Travis County, at 3.9 hail days a year on average, ahead of Williamson (3.9) and Hays (2.5). A hail day counts a date with at least one report in that county.
- How big was the largest hail in the Austin area?
- 4 inches, reported at Round Rock in Williamson County on September 24, 2023. 76 of the 581 reports since 2010 (13%) were 2 inches or larger.
- What was the worst hail day in the record?
- By number of reports, September 24, 2023: 63 reports across Travis, Williamson counties, with stones up to 4 inches.
- When is hail season in Austin?
- Spring. March, April and May hold 79% of the 233 Travis County reports since 2010, and April is the single busiest month with 69 reports.
- Is the current year complete?
- No. The newest event in the data is June 2, 2026, and NOAA adds events after the fact, so 2026 is always short.
Sources
- NOAA National Centers for Environmental Information, Storm Events Database. Bulk CSV files StormEvents_details, years 2010 to 2026, newest file dated September 18, 2026. https://www.ncei.noaa.gov/stormevents/. Bulk files: https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/.
- This site. Texas roof insurance claims: chapter 707, with the statute text checked on the date stated there.
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