Idaho Hail Statistics

Idaho averages 22.2 reports of 1-inch or larger hail a year, on 10.0 hail days. That ranks 37th of 51 and is under 1% of all such reports in the US. Hail peaks in June.

Data: NOAA Storm Events, 2021–2025 yearly averages

22.2Reports of 1-inch+ hail a year, 37th most
10.0Hail days a year, 35th most
2.75 inLargest stone reported, August 11, 2022

When hail falls in Idaho

  • 23.4 hail reports a year in all, 0.6 of them 2 inches or larger.
  • The most reports of 1-inch+ hail: Caribou County, about 2.8 a year.
  • The most reports come in June; nationally the peak is May.
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Share of Idaho hail reports by month, 2021–2025.

Hail by county in Idaho

31 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 Idaho. Column headers sort the table.
Caribou2.82.80.81.75 in
Bonneville2.22.21.41.25 in
Bannock2.02.01.21.50 in
Idaho1.41.61.42.10 in
Fremont0.81.41.01.50 in
Ada0.81.00.41.25 in
Kootenai0.81.00.82.75 in
Lewis0.80.80.41.25 in
Bonner0.80.80.81.25 in
Minidoka0.80.80.21.75 in
Cassia0.80.80.61.75 in
Power0.80.80.81.25 in
Butte0.60.60.61.00 in
Payette0.60.60.41.00 in
Canyon0.60.60.41.50 in
Gooding0.60.60.21.25 in
Twin Falls0.60.60.41.25 in
Latah0.40.40.41.00 in
Elmore0.40.40.21.00 in
Owyhee0.40.40.41.50 in
Boise0.40.40.41.25 in
Shoshone0.40.40.41.00 in
Jefferson0.40.40.41.00 in
Bingham0.40.40.41.25 in
Custer0.40.40.21.25 in
Adams0.20.20.21.50 in
Valley0.20.20.21.75 in
Clearwater0.20.20.21.75 in
Oneida0.20.20.21.00 in
Camas0.20.20.21.00 in
Lemhi0.20.20.21.75 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, "Idaho Hail Statistics," https://homestatsdata.com/storm-risk/hail-statistics/idaho/