Montana Hail Statistics

Montana averages 139 reports of 1-inch or larger hail a year, on 23.6 hail days. That ranks 15th of 51 and is 2% of all such reports in the US. Hail peaks in July.

Data: NOAA Storm Events, 2021–2025 yearly averages

139Reports of 1-inch+ hail a year, 15th most

23.6Hail days a year, 24th most

4.00 inLargest stone reported, June 8, 2021

When hail falls in Montana

147 hail reports a year in all, 20.2 of them 2 inches or larger.
The most reports of 1-inch+ hail: Yellowstone County, about 13.2 a year.
The most reports come in July; nationally the peak is May.

Share of Montana hail reports by month, 2021–2025.

Hail by county in Montana

54 counties with at least one hail report, 2021–2025. Yearly averages, sorted by 1-inch+ reports. More people means more reports, so populous counties tend to rank higher.

Hail statistics by county in Montana. Column headers sort the table.

Yellowstone	13.2	14.8	3.6	2.75 in
Cascade	8.0	8.6	2.2	3.00 in
Valley	5.6	5.6	3.4	4.00 in
Fergus	5.4	5.4	2.8	2.50 in
Phillips	5.2	5.2	1.8	3.00 in
Dawson	5.2	5.2	1.8	4.00 in
Big Horn	4.8	4.8	2.2	2.75 in
Powder River	4.4	4.8	2.4	2.50 in
Blaine	4.4	4.6	1.6	4.00 in
Roosevelt	4.4	4.4	2.4	1.75 in
Garfield	3.8	3.8	2.2	2.50 in
Prairie	3.4	3.4	2.0	3.00 in
Fallon	3.4	3.4	2.2	2.00 in
Missoula	3.4	3.4	1.6	2.50 in
Musselshell	3.2	3.4	1.2	2.00 in
Judith Basin	3.2	3.2	1.2	2.00 in
Richland	3.0	3.0	1.2	2.00 in
Petroleum	3.0	3.0	1.6	3.50 in
McCone	3.0	3.0	1.4	2.00 in
Custer	2.8	3.0	1.8	2.50 in
Glacier	2.8	2.8	1.0	1.75 in
Daniels	2.8	2.8	1.6	2.50 in
Wheatland	2.6	2.6	1.2	2.00 in
Sheridan	2.6	2.6	1.4	2.00 in
Wibaux	2.6	2.6	1.2	3.00 in
Rosebud	2.4	2.8	2.4	2.75 in
Stillwater	2.4	2.6	1.8	1.75 in
Hill	2.4	2.6	0.8	3.00 in
Gallatin	2.2	2.4	1.4	1.75 in
Teton	2.2	2.4	0.8	2.75 in
Carter	2.0	2.2	1.6	2.50 in
Lake	2.0	2.2	1.2	1.50 in
Carbon	2.0	2.0	1.0	2.00 in
Chouteau	1.8	2.0	1.2	2.50 in
Ravalli	1.2	1.6	1.0	1.50 in
Lewis and Clark	1.2	1.4	0.8	1.50 in
Golden Valley	1.0	1.2	1.0	2.00 in
Treasure	1.0	1.0	0.4	1.75 in
Toole	1.0	1.0	1.0	1.75 in
Madison	0.8	1.0	0.6	1.50 in
Broadwater	0.8	0.8	0.4	1.50 in
Powell	0.6	1.0	1.0	1.20 in
Park	0.6	0.8	0.8	1.75 in
Jefferson	0.6	0.8	0.8	1.00 in
Sanders	0.6	0.8	0.6	1.50 in
Liberty	0.6	0.8	0.6	2.50 in
Flathead	0.6	0.6	0.6	2.50 in
Sweet Grass	0.6	0.6	0.6	1.25 in
Pondera	0.6	0.6	0.4	1.75 in
Meagher	0.4	0.4	0.4	1.25 in
Beaverhead	0.4	0.4	0.4	1.75 in
Granite	0.2	0.8	0.8	2.00 in
Lincoln	0.2	0.2	0.2	1.00 in
Deer Lodge	0.2	0.2	0.2	1.00 in

About these numbers

Hail reports from the NOAA Storm Events Database, 2021–2025, averaged per year. These are reports to the National Weather Service, not every storm: places with more people report more hail. Full methodology.

Cite: Home Stats Data, "Montana Hail Statistics," https://homestatsdata.com/storm-risk/hail-statistics/montana/