Hail History

Hail history for Hamilton, Montana

NOAA hail reports in and within about 5 km (3 miles) of Hamilton since 1975, with preliminary reports to November 3, 2026.

Readout · Hamilton

Last hail
Jul 6, 2019
1.50 in, ping pong ball size
Hail days, last 5 years
0
since Nov 3, 2021 · 0 reports
Largest ever
1.75 in
golf ball · Jun 4, 2012

10 reports on 9 days since 1975 · #104 of 111 Montana places

Hail map · Hamilton

Hamilton Darby 25 mi
  • Under 1 in
  • 1–1.75 in
  • 1.75–2.5 in
  • 2.5–4 in
  • 4 in +
  • No size
10 most recent reports with a location; Ravalli County is shaded. Open street map

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What the record says about Hamilton

The latest hail report in and around Hamilton is from July 6, 2019, 1.50 in (ping pong ball size). There has been no hail report here in the five years since November 3, 2021.

Over the 20 years 2006–2025, Hamilton logged 4 reports on 4 hail days, about 0.2 reports a year. That is about half the median Montana town on this site (0.5 a year) and ranks #104 of 111 Montana cities and towns on this site for all-time reports. Hamilton accounts for 12% of the 85 reports filed in Ravalli County.

0% 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 1.75 in (golf ball) on June 4, 2012 near Hamilton.

The busiest year was 2004, with 2 reports on 1 day. Hail here peaks in June (50% of reports); 60% fall between April and June.

Reports a year 2006–2025 average

  • Hamilton 0.2
  • Ravalli County 2.3
  • Median Montana town on this site 0.5

Hail days 2006–2025

  • Hamilton 4
  • Ravalli County 29
  • Median Montana town on this site 7

Share 2 in or larger of sized reports

  • Hamilton 0%
  • Ravalli County 2%
  • Median Montana town on this site 8%

Hail over time

012 1975: 1 reports, largest 1.00 in 1980 1988: 1 reports, largest 1.00 in 1990 1991: 1 reports, largest 1.00 in 2000: 1 reports, largest 0.75 in 2000 2004: 2 reports, largest 1.00 in 2010 2012: 1 reports, largest 1.75 in 2016: 1 reports, largest 1.00 in 2018: 1 reports, largest 1.00 in 2019: 1 reports, largest 1.50 in 2020
Reports per year, 1975–2026. Bar colour shows the largest hail that year. Reporting grew sharply after the mid-1990s, so early decades undercount.
0246 Jan Feb Mar Apr May: 1 reports (10%) May June: 5 reports (50%) Jun July: 2 reports (20%) Jul August: 2 reports (20%) Aug Sep Oct Nov Dec
All 10 reports by calendar month.
Reports per month, 2017–2026. Darker cells had more reports.
YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2026 0
2025 0
2024 0
2023 0
2022 0
2021 0
2020 0
2019 1 1
2018 1 1
2017 0

Largest hail on record

Largest hail reports in Hamilton
Date Size Location County Damage Time · source
Jun 4, 2012 1.75 ingolf ball Hamilton Ravalli — 15:00 local · NCEI
Jul 6, 2019 1.50 inping pong ball 0.54 W Hamilton Ravalli — 19:27 local · NCEI
May 31, 2018 1.00 inquarter Hamilton Ravalli $20K 11:52 local · NCEI
Aug 9, 2016 1.00 inquarter 1 E Grantsdale Ravalli — 13:06 local · NCEI
Jun 9, 2004 1.00 inquarter Hamilton Ravalli — 15:50 local · NCEI

Size of every report

Most recent reports

Most recent hail reports in Hamilton
Date Size Location County Damage Time · source
Jul 6, 2019 1.50 inping pong ball 0.54 W Hamilton Ravalli — 19:27 local · NCEI
May 31, 2018 1.00 inquarter Hamilton Ravalli $20K 11:52 local · NCEI
Aug 9, 2016 1.00 inquarter 1 E Grantsdale Ravalli — 13:06 local · NCEI
Jun 4, 2012 1.75 ingolf ball Hamilton Ravalli — 15:00 local · NCEI
Jun 9, 2004 1.00 inquarter Hamilton Ravalli — 15:50 local · NCEI
Jun 9, 2004 1.00 inquarter Hamilton Ravalli — 15:30 local · NCEI
Jul 26, 2000 0.75 inpenny Hamilton Ravalli — 17:20 local · NCEI
Aug 10, 1991 1.00 inquarter — Ravalli — 21:00 local · NCEI
Jun 27, 1988 1.00 inquarter — Ravalli — 13:57 local · NCEI
Jun 23, 1975 1.00 inquarter — Ravalli — 15:30 local · NCEI

Hail history near Hamilton

Questions about hail in Hamilton

How often does it hail in Hamilton, Montana?

10 hail reports have been logged in and within about 5 km (3 miles) of Hamilton since 1975. Over the 20 years 2006–2025 that averages 0.2 reports a year. That ranks #104 of 111 Montana places by number of reports.

When is hail season in Hamilton?

Most reports come in June, July, August. June alone accounts for 50% of all reports.

What is the largest hail recorded in Hamilton?

1.75 in (golf ball size) on June 4, 2012 near Hamilton. 0% of reports here were 2 inches or larger.

When did it last hail in Hamilton?

The most recent report in this data is from July 6, 2019 (1.50 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.

How many hail storms has Hamilton had in the last five years?

None: there has been no hail report in and within about 5 km (3 miles) of Hamilton since November 3, 2021. The last one was on July 6, 2019.

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.