Hail History

Hail history for Big Horn County, Montana

Every NOAA hail report filed in Big Horn County since 1956, with preliminary National Weather Service reports to November 3, 2026.

Readout · Big Horn County

Last hail
Jun 27, 2026
1.00 in, quarter size
Hail days, last 5 years
10
since Nov 3, 2021 · 20 reports
Largest ever
4.00 in
grapefruit · Jul 25, 1962

248 reports on 142 days since 1956 · #11 of 57 Montana counties

Hail map · Big Horn County

Hardin Crow Agency Fort Smith Muddy Pryor Wyola 25 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
241 most recent reports with a location. Dot size and colour follow hail size. Open street map

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 Big Horn County is from June 27, 2026. A local roofer can check and document it at no cost.

Phone line opening soon

What would a claim cost you? Try the hail claim calculator

Preview: this form is not connected yet. Nothing you enter is sent or stored.

Roofer? Get hail alerts for your area with StormScope

What the record says about Big Horn County

The latest hail report in Big Horn County is from June 27, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 10 separate hail days; the biggest stones in that time were 2.75 in on June 13, 2025.

Over the 20 years 2006–2025, Big Horn County logged 134 reports on 68 hail days, about 6.7 reports a year. That is about twice the median Montana county (3.0 a year) and ranks #11 of 57 Montana counties for all-time reports. Big Horn County holds 3% of all 8,453 hail reports in Montana.

8% 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 July 25, 1962.

Reports were down 33% in 2016–2025 (54) compared with 2006–2015 (80). The busiest year was 2001, with 22 reports on 14 days. Hail here peaks in June (48% of reports); 59% fall between April and June.

Reports a year 2006–2025 average

  • Big Horn County 6.7
  • Median Montana county 3.0

Hail days 2006–2025

  • Big Horn County 68
  • Median Montana county 31

Share 2 in or larger of sized reports

  • Big Horn County 8%
  • Median Montana county 7%

Hail over time

0102030 1956: 1 reports, largest 1.00 in 1958: 6 reports, largest 3.00 in 1959: 1 reports, largest 1.00 in 1960 1962: 2 reports, largest 4.00 in 1963: 2 reports, largest 1.75 in 1965: 1 reports, largest 0.75 in 1966: 1 reports, largest 1.75 in 1968: 1 reports, largest 0.75 in 1969: 2 reports, largest 0.75 in 1970 1976: 1 reports, largest 2.00 in 1980 1984: 1 reports, largest 1.75 in 1989: 1 reports, largest 1.00 in 1990: 1 reports, largest 1.50 in 1990 1991: 1 reports, largest 1.75 in 1993: 2 reports, largest 1.25 in 1994: 1 reports, largest 1.50 in 1995: 2 reports, largest 1.00 in 1996: 11 reports, largest 3.00 in 1997: 8 reports, largest 0.88 in 1998: 9 reports, largest 2.75 in 1999: 3 reports, largest 0.88 in 2000: 3 reports, largest 1.00 in 2000 2001: 22 reports, largest 1.75 in 2002: 7 reports, largest 1.00 in 2003: 2 reports, largest 0.75 in 2004: 4 reports, largest 1.25 in 2005: 17 reports, largest 1.75 in 2006: 16 reports, largest 2.75 in 2007: 3 reports, largest 1.00 in 2008: 17 reports, largest 2.00 in 2009: 5 reports, largest 1.75 in 2010: 8 reports, largest 2.75 in 2010 2011: 3 reports, largest 1.00 in 2012: 1 reports, largest 1.00 in 2013: 7 reports, largest 1.00 in 2014: 8 reports, largest 2.50 in 2015: 12 reports, largest 2.00 in 2016: 3 reports, largest 1.00 in 2017: 1 reports, largest 0.75 in 2018: 10 reports, largest 1.75 in 2019: 14 reports, largest 1.75 in 2020: 2 reports, largest 1.00 in 2020 2021: 5 reports, largest 1.75 in 2022: 3 reports, largest 1.00 in 2023: 5 reports, largest 2.50 in 2025: 11 reports, largest 2.75 in 2026: 1 reports, largest 1.00 in
Reports per year, 1956–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
050100150 Jan Feb Mar April: 1 reports (0%) Apr May: 26 reports (10%) May June: 120 reports (48%) Jun July: 76 reports (31%) Jul August: 22 reports (9%) Aug September: 3 reports (1%) Sep Oct Nov Dec
All 248 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 1 1
2025 722 11
2024 0
2023 32 5
2022 21 3
2021 23 5
2020 2 2
2019 572 14
2018 352 10
2017 1 1

Hail days since Nov 3, 2021

DateReportsLargestStorm page
Jun 27, 2026 1 1.00 in —
Aug 7, 2025 2 1.00 in —
Jul 5, 2025 2 1.75 in —
Jun 28, 2025 1 1.25 in —
Jun 13, 2025 6 2.75 in —
Jul 11, 2023 1 2.50 in —
Jul 2, 2023 1 1.00 in —
Jun 6, 2023 3 1.50 in —
Jul 3, 2022 1 1.00 in —
Jun 11, 2022 2 1.00 in —

Largest hail on record

Largest hail reports in Big Horn County
Date Size Location Time · source
Jul 25, 1962 4.00 ingrapefruit — 17:00 local · NCEI
Jun 22, 1996 3.00 inteacup Hardin 13:00 local · NCEI
Jun 5, 1958 3.00 inteacup — 16:00 local · NCEI
Jun 5, 1958 3.00 inteacup — 16:00 local · NCEI
Jun 13, 2025 2.75 inbaseball 0.48 W Pryor 18:10 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

Most recent reports

Most recent hail reports in Big Horn County
Date Size Location Time · source
Jun 27, 2026 1.00 inquarter 2.29 SSE Crow Agency 13:38 local · NCEI
Aug 7, 2025 1.00 inquarter 0.96 W Hardin 17:05 local · NCEI
Aug 7, 2025 1.00 inquarter 1.93 W Hardin Airpark 17:00 local · NCEI
Jul 5, 2025 1.50 inping pong ball 16.08 E Crow Agency 13:35 local · NCEI
Jul 5, 2025 1.75 ingolf ball 3.59 NNE St Xavier 12:46 local · NCEI
Jun 28, 2025 1.25 inhalf dollar 2.13 SSW Kirby 19:06 local · NCEI
Jun 13, 2025 1.50 inping pong ball 16.65 N Kirby 19:00 local · NCEI
Jun 13, 2025 2.00 inhen egg 0.48 W Pryor 18:15 local · NCEI
Jun 13, 2025 2.50 intennis ball 0.97 E Pryor 18:11 local · NCEI
Jun 13, 2025 2.75 inbaseball 0.48 W Pryor 18:10 local · NCEI
Jun 13, 2025 1.00 inquarter 10.36 N Hardin 18:10 local · NCEI
Jun 13, 2025 2.50 intennis ball 0.69 S Pryor 18:08 local · NCEI

Cities and towns in Big Horn County

PlaceReportsLargest
Hardin593.00 in
Crow Agency262.75 in
Fort Smith101.50 in
Muddy101.75 in
Pryor102.75 in
Wyola104.00 in

Smaller places with fewer than 10 reports

These places have too few reports for a page of their own, so their record lives here.

PlaceReportsHail daysLatest
Busby88Jun 13, 2025
St. Xavier55Jun 2, 2008
Forty Mile Colony22Jul 18, 1969
Lodge Grass11Jun 3, 1996

Questions about hail in Big Horn County

How often does it hail in Big Horn County, Montana?

248 hail reports have been logged in Big Horn County since 1956. Over the 20 years 2006–2025 that averages 6.7 reports a year. That ranks #11 of 57 Montana counties by number of reports.

When is hail season in Big Horn County?

Most reports come in June, July, May. June alone accounts for 48% of all reports.

What is the largest hail recorded in Big Horn County?

4.00 in (grapefruit size) on July 25, 1962. 8% of reports here were 2 inches or larger.

When did it last hail in Big Horn 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 Big Horn County had in the last five years?

10 separate days with hail reports since November 3, 2021, adding up to 20 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.