Hail history for Grass Range, Montana
NOAA hail reports in and within about 5 km (3 miles) of Grass Range since 1991, with preliminary reports to November 3, 2026.
Readout · Grass Range
- Last hail
- Aug 7, 2025
- 1.00 in, quarter size
- Hail days, last 5 years
- 2
- since Nov 3, 2021 · 5 reports
- Largest ever
- 3.50 in
- teacup · Aug 6, 2002
17 reports on 12 days since 1991 · #55 of 111 Montana places
Hail map · Grass Range
- 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 Grass Range is from August 7, 2025. A local roofer can check and document it at no cost.
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What the record says about Grass Range
The latest hail report in and around Grass Range is from August 7, 2025, 1.00 in (quarter size). Since November 3, 2021 there have been 2 separate hail days; the biggest stones in that time were 1.50 in on June 15, 2025.
Over the 20 years 2006–2025, Grass Range logged 9 reports on 5 hail days, about 0.5 reports a year. That is about the same as the median Montana town on this site (0.5 a year) and ranks #55 of 111 Montana cities and towns on this site for all-time reports. Grass Range accounts for 7% of the 260 reports filed in Fergus County.
12% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median Montana town on this site. The largest hail on record here is 3.50 in (teacup) on August 6, 2002 near Grassrange.
Reports were up 250% in 2016–2025 (7) compared with 2006–2015 (2). The busiest year was 2025, with 5 reports on 2 days. Hail here peaks in August (41% of reports); 29% fall between April and June.
Reports a year 2006–2025 average
- Grass Range 0.5
- Fergus County 6.5
- Median Montana town on this site 0.5
Hail days 2006–2025
- Grass Range 5
- Fergus County 71
- Median Montana town on this site 7
Share 2 in or larger of sized reports
- Grass Range 12%
- Fergus County 10%
- Median Montana town on this site 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0 | ||||||||||||
| 2025 | 3 | 2 | 5 | ||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 2 | 2 | |||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Aug 7, 2025 | 2 | 1.00 in | — |
| Jun 15, 2025 | 3 | 1.50 in | — |
Largest hail on record
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Aug 6, 2002 | 3.50 inteacup | Grassrange | Fergus | 17:10 local · NCEI |
| Aug 14, 1999 | 2.00 inhen egg | Grassrange | Fergus | 18:15 local · NCEI |
| Jun 15, 2025 | 1.50 inping pong ball | 1.17 NW Grassrange | Fergus | 17:14 local · NCEI |
| Jun 15, 2025 | 1.25 inhalf dollar | 1.17 NW Grassrange | Fergus | 17:00 local · NCEI |
| Jul 7, 2020 | 1.25 inhalf dollar | Grassrange | Fergus | 15:00 local · NCEI |
Size of every report
- Under 1 in 3 18%
- 1–2 in 12 71%
- 2 in + 2 12%
Most recent reports
| Date | Size | Location | County | Time · source |
|---|---|---|---|---|
| Aug 7, 2025 | 1.00 inquarter | 1.17 NW Grassrange | Fergus | 14:29 local · NCEI |
| Aug 7, 2025 | 1.00 inquarter | 1.41 W Grassrange | Fergus | 14:27 local · NCEI |
| Jun 15, 2025 | 1.50 inping pong ball | 1.17 NW Grassrange | Fergus | 17:14 local · NCEI |
| Jun 15, 2025 | 1.25 inhalf dollar | 1.17 NW Grassrange | Fergus | 17:00 local · NCEI |
| Jun 15, 2025 | 1.00 inquarter | 1.67 SW Grassrange Clark Arp | Fergus | 16:57 local · NCEI |
| Jul 7, 2020 | 1.25 inhalf dollar | Grassrange | Fergus | 15:00 local · NCEI |
| Jul 7, 2020 | 1.25 inhalf dollar | 1 NNW Grassrange | Fergus | 15:00 local · NCEI |
| Aug 3, 2013 | 1.25 inhalf dollar | Grassrange | Fergus | 22:14 local · NCEI |
| Jun 26, 2008 | 1.00 inquarter | 1 S Grassrange | Fergus | 00:02 local · NCEI |
| Aug 6, 2002 | 1.00 inquarter | Grassrange | Fergus | 17:30 local · NCEI |
| Aug 6, 2002 | 3.50 inteacup | Grassrange | Fergus | 17:10 local · NCEI |
| May 21, 2002 | 0.75 inpenny | Grassrange | Fergus | 17:50 local · NCEI |
Hail history near Grass Range
Questions about hail in Grass Range
How often does it hail in Grass Range, Montana?
17 hail reports have been logged in and within about 5 km (3 miles) of Grass Range since 1991. Over the 20 years 2006–2025 that averages 0.5 reports a year. That ranks #55 of 111 Montana places by number of reports.
When is hail season in Grass Range?
Most reports come in August, July, June. August alone accounts for 41% of all reports.
What is the largest hail recorded in Grass Range?
3.50 in (teacup size) on August 6, 2002 near Grassrange. 12% of reports here were 2 inches or larger.
When did it last hail in Grass Range?
The most recent report in this data is from August 7, 2025 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Grass Range had in the last five years?
2 separate days with hail reports since November 3, 2021, adding up to 5 reports. The most recent was August 7, 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.