States › Montana › Granite County › Hail
Hail in Granite County, Montana
31 hail events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Hail.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 31 hail events in Granite County, Montana, between 1950 and 2026, spread over 16 years.
July is the busiest month, with 13 of the recorded events. The last 20 years account for 23 events against 6 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.4% of the 8,391 hail events recorded in Montana; its 1.8 per 100 square miles compares with 5.8 statewide.
4 of the hail reports with a recorded size were golf-ball size (1.75 inches) or larger; the largest recorded stone was 2.00 inches (hen egg size).
Compared with Montana
| Measure | Granite County | Montana | US |
|---|---|---|---|
| Hail events since 1950 | 31 | 8,391 | 424,356 |
| Per 100 square miles | 1.8 | 5.8 | 12.0 |
| Per 10,000 residents | 92.7 | 76.0 | 12.8 |
| Deaths recorded | 0 | 0 | 29 |
| Busiest month | July | July | May |
By year
Seasonality
0Feb
0Mar
0Apr
1May
2Jun
4Jul
13Aug
11Sep
0Oct
0Nov
0Dec
0
Magnitude distribution
NWS hail-size descriptors
- under 1 in
- pea to quarter
- 1–1.74 in
- quarter to golf ball
- 1.75–2.74 in
- golf ball to baseball
- 2.75–3.99 in
- baseball to softball
- 4 in and larger
- softball and larger
Hail size in inches as recorded by NCEI; events without a size are not binned.
Recorded events
All 31 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 9 Jul 2022 | Hail | 0.88 in | — | — | — | — | County |
| 8 Jul 2022 | Hail | 0.88 in | — | — | — | — | County |
| 7 Jul 2022 | Hail | 0.88 in | — | — | — | — | County |
| 21 Jul 2021 | Hail | 2.00 in | — | — | — | — | County |
| 13 Jul 2019 | Hail | 2.00 in | — | — | — | — | County |
| 13 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 27 Jul 2018 | Hail | 1.75 in | — | — | — | — | County |
| 31 May 2018 | Hail | 1.00 in | — | — | — | — | County |
| 6 May 2017 | Hail | 1.00 in | — | — | — | — | County |
| 9 Aug 2013 | Hail | 0.75 in | — | — | — | — | County |
| 1 Aug 2013 | Hail | 0.75 in | — | — | — | — | County |
| 4 Jun 2012 | Hail | 1.00 in | — | — | — | — | County |
| 5 Aug 2010 | Hail | 0.88 in | — | — | — | — | County |
| 21 Aug 2009 | Hail | 1.00 in | — | — | — | — | County |
| 21 Aug 2009 | Hail | 1.50 in | — | — | — | — | County |
| 21 Aug 2009 | Hail | 1.25 in | — | — | — | — | County |
| 21 Aug 2009 | Hail | 1.00 in | — | — | — | — | County |
| 26 Jul 2009 | Hail | 1.00 in | — | — | — | — | County |
| 6 Jul 2009 | Hail | 1.00 in | — | — | — | — | County |
| 6 Jul 2009 | Hail | 0.75 in | — | — | — | — | County |
| 23 Jul 2008 | Hail | 1.00 in | — | — | — | — | County |
| 4 Jul 2008 | Hail | 1.75 in | $12K | — | — | — | County |
| 17 Apr 2007 | Hail | 0.75 in | — | — | — | — | County |
| 8 Aug 2005 | Hail | 1.25 in | — | — | — | — | County |
| 17 Jun 2005 | Hail | 0.75 in | — | — | — | — | County |
| 5 Aug 2004 | Hail | 0.75 in | — | — | — | — | County |
| 7 Aug 1997 | Hail | 1.00 in | — | — | — | — | County |
| 17 Jul 1997 | Hail | 1.00 in | — | — | — | — | County |
| 1 Aug 1996 | Hail | 0.75 in | — | — | — | — | County |
| 6 Jun 1958 | Hail | 0.75 in | — | — | — | — | County |
| 6 Jun 1958 | Hail | 0.75 in | — | — | — | — | County |
Questions and answers
How many hail events has Granite County had?
31 events in the NCEI Storm Events record between 1950 and 2026. Reporting of hail became far more complete after 1996, so early decades undercount.
When was the last recorded hail event in Granite County?
9 Jul 2022 (Hail, 0.88 in). Records reach NCEI about 120 days after the month ends.
What was the most damaging hail event recorded in Granite County?
The hail of 4 Jul 2008, with property damage estimated by NCEI at $12K.
How does Granite County compare with Montana for hail?
1.8 events per 100 square miles against 5.8 statewide; the county holds 31 of the state's 8,391 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Hail hub and the county page.