Hail history for Yellowstone County, Montana
Every NOAA hail report filed in Yellowstone County since 1955, with preliminary National Weather Service reports to November 3, 2026.
Readout · Yellowstone County
- Last hail
- Sep 7, 2026
- 2.75 in, baseball size · preliminary
- Hail days, last 5 years
- 18
- since Nov 3, 2021 · 65 reports
- Largest ever
- 3.50 in
- teacup · Jun 24, 1991
512 reports on 190 days since 1955 · #1 of 57 Montana counties
Hail map · Yellowstone County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
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What the record says about Yellowstone County
The latest hail report in Yellowstone County is from September 7, 2026, 2.75 in (baseball size). Since November 3, 2021 there have been 18 separate hail days; the biggest stones in that time were 2.75 in on September 7, 2026.
Over the 20 years 2006–2025, Yellowstone County logged 308 reports on 80 hail days, about 15.4 reports a year. That is 5.0 times the median Montana county (3.0 a year) and ranks #1 of 57 Montana counties for all-time reports. Yellowstone County holds 6% of all 8,453 hail reports in Montana.
9% of reports with a size were 2 inches (hen egg) or larger, against 7% for the median Montana county. The largest hail on record here is 3.50 in (teacup) on June 24, 1991.
Reports were up 50% in 2016–2025 (185) compared with 2006–2015 (123). The busiest year was 2001, with 50 reports on 15 days. Hail here peaks in July (35% of reports); 45% fall between April and June.
Reports a year 2006–2025 average
- Yellowstone County 15.4
- Median Montana county 3.0
Hail days 2006–2025
- Yellowstone County 80
- Median Montana county 31
Share 2 in or larger of sized reports
- Yellowstone County 9%
- Median Montana county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | 4 | 6 | |||||||||
| 2025 | 3 | 8 | 18 | 29 | |||||||||
| 2024 | 2 | 1 | 3 | ||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 26 | 26 | |||||||||||
| 2021 | 1 | 9 | 5 | 15 | |||||||||
| 2020 | 1 | 1 | 3 | 5 | |||||||||
| 2019 | 4 | 6 | 6 | 29 | 45 | ||||||||
| 2018 | 8 | 3 | 13 | 1 | 25 | ||||||||
| 2017 | 1 | 1 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Sep 7, 2026 | 1 | 2.75 in | View |
| Sep 6, 2026 | 3 | 2.75 in | View |
| Aug 23, 2026 | 1 | 0.70 in | View |
| Jun 7, 2026 | 1 | 1.00 in | — |
| Aug 7, 2025 | 18 | 1.75 in | — |
| Jul 28, 2025 | 6 | 1.75 in | — |
| Jul 23, 2025 | 1 | 1.00 in | — |
| Jul 21, 2025 | 1 | 1.75 in | — |
| Jun 16, 2025 | 3 | 1.50 in | — |
| Aug 6, 2024 | 1 | 1.00 in | — |
| Jun 27, 2024 | 1 | 1.75 in | — |
| Jun 23, 2024 | 1 | 1.00 in | — |
| Jun 1, 2023 | 1 | 1.00 in | — |
| Jul 24, 2022 | 6 | 1.50 in | — |
| Jul 15, 2022 | 2 | 1.75 in | — |
| Jul 5, 2022 | 14 | 2.75 in | — |
| Jul 3, 2022 | 1 | 1.00 in | — |
| Jul 1, 2022 | 3 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 24, 1991 | 3.50 inteacup | — | 21:20 local · NCEI |
| Aug 11, 2019 | 3.00 inteacup | 2 SW Billings Logan Arpt | 18:11 local · NCEI |
| Jul 5, 1996 | 3.00 inteacup | Shepherd | 16:10 local · NCEI |
| May 20, 1991 | 3.00 inteacup | — | 00:10 local · NCEI |
| May 19, 1991 | 3.00 inteacup | — | 23:30 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 162 32%
- 1–2 in 305 60%
- 2 in + 44 9%
- No size 1
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Sep 7, 2026 | 2.75 inbaseball | 1 SW Shepherd | 20:30 UTC · NWS prelim. |
| Sep 6, 2026 | 2.00 inhen egg | Shepherd | 08:30 UTC · NWS prelim. |
| Sep 6, 2026 | 2.75 inbaseball | 1 SW Shepherd | 08:30 UTC · NWS prelim. |
| Sep 6, 2026 | 1.00 inquarter | 1 ENE Huntley | 08:30 UTC · NWS prelim. |
| Aug 23, 2026 | 0.70 inmarble | 2 W Laurel | 23:50 UTC · NWS prelim. |
| Jun 7, 2026 | 1.00 inquarter | 3.96 ENE Lockwood | 14:38 local · NCEI |
| Aug 7, 2025 | 1.00 inquarter | 0.69 S Shepherd | 16:52 local · NCEI |
| Aug 7, 2025 | 1.75 ingolf ball | 8.35 N Laurel Muni Arpt | 16:20 local · NCEI |
| Aug 7, 2025 | 1.00 inquarter | 2.41 W Billings Logan Arpt | 16:16 local · NCEI |
| Aug 7, 2025 | 1.00 inquarter | 5.82 W Billings Logan Arpt | 16:14 local · NCEI |
| Aug 7, 2025 | 1.00 inquarter | 0.69 S Shepherd | 16:00 local · NCEI |
| Aug 7, 2025 | 1.00 inquarter | 1.19 SW Billings Logan Arpt | 15:52 local · NCEI |
Cities and towns in Yellowstone County
Smaller places with fewer than 10 reports
These places have too few reports for a page of their own, so their record lives here.
| Place | Reports | Hail days | Latest |
|---|---|---|---|
| Broadview | 7 | 7 | Jul 23, 2025 |
| Custer | 5 | 5 | Jun 27, 2024 |
| Ballantine | 4 | 4 | Aug 11, 2011 |
| Acton | 2 | 2 | Jun 21, 2018 |
| Nibbe | 2 | 2 | May 23, 2018 |
Questions about hail in Yellowstone County
How often does it hail in Yellowstone County, Montana?
512 hail reports have been logged in Yellowstone County since 1955. Over the 20 years 2006–2025 that averages 15.4 reports a year. That ranks #1 of 57 Montana counties by number of reports.
When is hail season in Yellowstone County?
Most reports come in July, June, May. July alone accounts for 35% of all reports.
What is the largest hail recorded in Yellowstone County?
3.50 in (teacup size) on June 24, 1991. 9% of reports here were 2 inches or larger.
When did it last hail in Yellowstone County?
The most recent report in this data is from September 7, 2026 (2.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Yellowstone County had in the last five years?
18 separate days with hail reports since November 3, 2021, adding up to 65 reports. The most recent was September 7, 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.