Hail history for Carbon County, Montana
Every NOAA hail report filed in Carbon County since 1957, with preliminary National Weather Service reports to November 3, 2026.
Readout · Carbon County
- Last hail
- Jun 27, 2026
- 1.00 in, quarter size
- Hail days, last 5 years
- 5
- since Nov 3, 2021 · 9 reports
- Largest ever
- 4.00 in
- grapefruit · Jun 18, 1958
118 reports on 70 days since 1957 · #29 of 57 Montana counties
Hail map · Carbon County
- 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 Carbon County is from June 27, 2026. A local roofer can check and document it at no cost.
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What the record says about Carbon County
The latest hail report in Carbon County is from June 27, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 5 separate hail days; the biggest stones in that time were 2.00 in on July 28, 2025.
Over the 20 years 2006–2025, Carbon County logged 60 reports on 28 hail days, about 3.0 reports a year. That is about the same as the median Montana county (3.0 a year) and ranks #29 of 57 Montana counties for all-time reports. Carbon County holds 1% of all 8,453 hail reports in Montana.
4% 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 4.00 in (grapefruit) on June 18, 1958.
Reports were up 50% in 2016–2025 (36) compared with 2006–2015 (24). The busiest year was 2001, with 13 reports on 8 days. Hail here peaks in June (48% of reports); 61% fall between April and June.
Reports a year 2006–2025 average
- Carbon County 3.0
- Median Montana county 3.0
Hail days 2006–2025
- Carbon County 28
- Median Montana county 31
Share 2 in or larger of sized reports
- Carbon County 4%
- Median Montana county 7%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | |||||||||||
| 2025 | 6 | 1 | 7 | ||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 2 | 2 | |||||||||||
| 2020 | 1 | 1 | 1 | 3 | |||||||||
| 2019 | 1 | 5 | 1 | 7 | |||||||||
| 2018 | 1 | 5 | 5 | 1 | 12 | ||||||||
| 2017 | 2 | 2 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Jun 27, 2026 | 1 | 1.00 in | — |
| Jul 28, 2025 | 1 | 2.00 in | — |
| Jun 16, 2025 | 2 | 1.25 in | — |
| Jun 13, 2025 | 4 | 1.50 in | — |
| Jul 2, 2023 | 1 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 18, 1958 | 4.00 ingrapefruit | — | 16:00 local · NCEI |
| Jun 18, 1958 | 4.00 ingrapefruit | — | 16:00 local · NCEI |
| Jul 3, 1975 | 3.00 inteacup | — | 19:50 local · NCEI |
| Jul 28, 2025 | 2.00 inhen egg | 0.48 E Joliet | 20:35 local · NCEI |
| Jul 16, 1986 | 2.00 inhen egg | — | 15:00 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 50 42%
- 1–2 in 63 53%
- 2 in + 5 4%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Jun 27, 2026 | 1.00 inquarter | 0.84 NE Bridger | 11:47 local · NCEI |
| Jul 28, 2025 | 2.00 inhen egg | 0.48 E Joliet | 20:35 local · NCEI |
| Jun 16, 2025 | 1.25 inhalf dollar | 5.61 N Red Lodge | 14:13 local · NCEI |
| Jun 16, 2025 | 1.00 inquarter | 4.84 N Red Lodge | 14:09 local · NCEI |
| Jun 13, 2025 | 1.25 inhalf dollar | 0.48 E Rockvale | 17:52 local · NCEI |
| Jun 13, 2025 | 1.50 inping pong ball | 4.39 SSW Roberts | 17:48 local · NCEI |
| Jun 13, 2025 | 1.50 inping pong ball | 4.39 SSW Roberts | 17:45 local · NCEI |
| Jun 13, 2025 | 1.25 inhalf dollar | 0.84 SW Rockvale | 17:40 local · NCEI |
| Jul 2, 2023 | 1.00 inquarter | 2.06 ENE Roberts | 19:00 local · NCEI |
| May 28, 2021 | 1.50 inping pong ball | 1.19 SE Edgar | 15:10 local · NCEI |
| May 28, 2021 | 1.25 inhalf dollar | 0.97 E Edgar | 15:08 local · NCEI |
| Aug 19, 2020 | 0.88 innickel | 0.49 E Red Lodge Arpt | 14:20 local · NCEI |
Cities and towns in Carbon 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 |
|---|---|---|---|
| Boyd | 9 | 8 | Jul 26, 2018 |
| Fox | 9 | 6 | Jun 16, 2025 |
| Fromberg | 7 | 6 | Jul 1, 2019 |
| Edgar | 6 | 5 | May 28, 2021 |
| Roberts | 6 | 4 | Jul 2, 2023 |
| Rockvale | 5 | 4 | Jun 13, 2025 |
| Roscoe | 5 | 5 | Jul 5, 2020 |
| Belfry | 4 | 3 | Jun 13, 2013 |
| Luther | 4 | 4 | Jul 6, 2019 |
| Silesia | 2 | 2 | Jun 24, 2005 |
Questions about hail in Carbon County
How often does it hail in Carbon County, Montana?
118 hail reports have been logged in Carbon County since 1957. Over the 20 years 2006–2025 that averages 3.0 reports a year. That ranks #29 of 57 Montana counties by number of reports.
When is hail season in Carbon County?
Most reports come in June, July, May. June alone accounts for 48% of all reports.
What is the largest hail recorded in Carbon County?
4.00 in (grapefruit size) on June 18, 1958. 4% of reports here were 2 inches or larger.
When did it last hail in Carbon County?
The most recent report in this data is from June 27, 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 Carbon County had in the last five years?
5 separate days with hail reports since November 3, 2021, adding up to 9 reports. The most recent was June 27, 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.