NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Hamilton, MT
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Hamilton, Montana since records began in 1851. Since 1950, 3 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 3
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Hamilton
The strongest of the 3 tornadoes within 25 miles was an F2 on June 23, 1975; its path came within 10 miles. The most recent tornado was on August 15, 1990. Of the 73 Montana cities on this site, 59% have more tornadoes within 25 miles than Hamilton. Hail has been reported within 10 miles 17 times since 1975, with stones up to 1.75 inches (golf ball size). Of the 73 Montana cities, 59% have more hail reports within 10 miles than Hamilton.
Compare Hamilton's storm record with another city →
Tornadoes within 25 miles of Hamilton
By decade
- 1990s1
- 1980s1
- 1970s1
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 23, 1975 | F2 | 10 mi | 0.1 mi | 0 / 1 |
| Aug 15, 1990 | F0 | 15 mi | 0.1 mi | 0 / 0 |
| Oct 16, 1988 | F0 | 2 mi | 0.2 mi | 0 / 0 |
The strongest 3 of 3, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Hamilton
The Storm Prediction Center has 17 hail reports within 10 miles of Hamilton since 1975, made on 14 separate days. Of these, 14 were 1 inch across or larger, and none reached 2 inches. The largest size, 1.75 inches (golf ball size), was reported on 2 days, most recently June 4, 2012. The most recent report is from July 8, 2022. June has the most reports, 6.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Hamilton
The nearest NOAA station with 1991–2020 climate normals is Hamilton, MT, 2 miles northwest of Hamilton at 3,585 feet. July is the warmest, with an average high of 84°F and low of 50°F; December is the coolest, at 34°F and 18°F. June is the wettest at 1.7 inches of precipitation on average and August and September the driest at 0.8 inches; the year adds up to 13.7 inches over 42 days with at least a tenth of an inch. Highs reach 90°F on about 22 days a year, almost all from June to September. Lows fall below freezing on about 172 nights a year. That 13.7 inches is more than at 22 of the 58 Montana stations used on this site (38%). Corvallis, 8 miles northeast, has its own station (Western Ag Rsch Ctr, MT): 11.5 inches a year, 2.2 less than here, and a July average high of 86°F against 84°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 35 | 19 | 1.0 | 3 |
| Feb | 39 | 20 | 1.2 | 3 |
| Mar | 49 | 25 | 1.0 | 4 |
| Apr | 56 | 31 | 1.1 | 3 |
| May | 66 | 38 | 1.5 | 5 |
| Jun | 73 | 45 | 1.7 | 5 |
| Jul | 84 | 50 | 0.9 | 3 |
| Aug | 82 | 48 | 0.8 | 3 |
| Sep | 72 | 40 | 0.8 | 3 |
| Oct | 57 | 31 | 0.9 | 3 |
| Nov | 43 | 23 | 1.5 | 4 |
| Dec | 34 | 18 | 1.3 | 4 |
| Year | 57 | 32 | 13.7 | 42 |
Averages for 1991–2020 at Hamilton, MT (3,585 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Hamilton
Since 1996, the National Weather Service has logged 15 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Hamilton: 12 thunderstorm wind reports, 1 flash flood, 1 flood and 1 heavy rain event. None is recorded as killing or injuring anyone; the NWS estimated $22,000 in property and crop damage. The strongest thunderstorm gust on record here was 69 mph, on July 5, 2006.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Ravalli County, which includes Hamilton, has been named in 13 federal disaster or emergency declarations since 1996, 7 of them major disasters (by incident: 5 fires, 3 severe storms, 2 biological emergencies, 1 flood). The latest major disaster declaration was Severe Winter Storm and Straight-Line Winds, on April 7, 2026. FEMA's National Risk Index gives Ravalli County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively Moderate for lightning; Relatively Low for inland flooding and heat waves; Very Low for tornadoes, hail and strong wind. It models the county's expected loss from all 18 hazards it covers at $37.0 million a year, the 6th highest of 56 Montana counties; of the hazards above, the largest share, $6.6 million (18%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Hamilton
- Corvallis, MT8 mi
- Victor, MT13 mi
- Stevensville, MT23 mi
- Darby, MT26 mi
- Florence, MT30 mi
- Lolo, MT38 mi
- Missoula, MT45 mi
- Bonner, MT53 mi
- Anaconda, MT56 mi
- Frenchtown, MT58 mi
- Arlee, MT66 mi
- Deer Lodge, MT68 mi
All Montana cities →All hurricanes since 1851 →Compare Hamilton with another place →