Freezing Fog in Montana
Every freezing fog event the National Weather Service has filed in Montana, year by year, with the most significant episodes. Fog that froze on contact with roads, vehicles or structures.
The most significant on the map
The most significant freezing fog episodes in Montana.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 24
- Deaths
- 3
- Injuries
- 7
- Damage
- $364,000
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Dense Fog and Freezing Fog in Montana, December 15 to 18, 2023High pressure led to stable conditions and cold pool formation across the Northern Rockies. This led to a prolonged period of dense fog.
- Freezing Fog and Dense Fog in Montana, December 21 to 22, 2023Dense fog impacted a number of locations in western Montana, leading to black ice on roadways and impacts at area airports.
- Winter Storm and Freezing Fog in Montana, January 18 to 24, 2010A storm system moved from southern California into the northern Rockies and northern Plains. Very stable conditions ahead of the storm system created several days of very dense fog from the 18th through the 22nd of January.
- Freezing Fog in Montana, January 1 to 4, 2026This episode of freezing fog mainly affected areas near and north of US-Highway 2. Main impacts were near zero visibility and rime icing on power lines, which lead to some scattered power outages.
- Freezing Fog in Montana, December 5, 2010Several days of freezing fog accumulated on power lines across the area. Minor power pole damage was noted due to the accumulation of rime ice.
- Freezing Fog in Montana, November 11 to 14, 1996Widespread fog developed over north central Montana late in the day Monday, November 11th and persisted for the next several days. This caused ice to slowly build up on exposed surfaces.
- Freezing Fog in Montana, March 24, 2017Clearing skies overnight, light winds, and an unusually moist layer of air at the surface from recent flood waters all combined to create a bank of dense freezing fog which spread across most of Sheridan County in far northeast Montana.
More
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.