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Winter in Jefferson County, Montana
109 winter storms and snow events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Winter Storm, Winter Weather, Heavy Snow, Blizzard, Ice Storm, Lake-Effect Snow, Sleet.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Jefferson County, Montana, has 109 winter events in the NCEI record since 1950, with at least one in 23 different years.
April is the busiest month, with 20 of the recorded events. The last 20 years account for 84 events against 25 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.3% of the 8,475 winter events recorded in Montana; its 6.6 per 100 square miles compares with 5.8 statewide.
Some winter weather and high wind events are recorded by NWS forecast zone rather than by county; zone-recorded events whose zone is named for the county are included and marked "Forecast zone" in the table.
Compared with Montana
| Measure | Jefferson County | Montana | US |
|---|---|---|---|
| Winter events since 1950 | 109 | 8,475 | 287,339 |
| Per 100 square miles | 6.6 | 5.8 | 8.1 |
| Per 10,000 residents | 87.4 | 76.7 | 8.7 |
| Deaths recorded | 0 | 86 | 2,509 |
| Busiest month | April | December | January |
By year
Seasonality
12Feb
14Mar
7Apr
20May
7Jun
5Jul
0Aug
0Sep
4Oct
13Nov
14Dec
13
Recorded events
All 109 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 28 Apr 2022 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 11 Apr 2022 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 22 May 2021 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 18 Apr 2021 | Winter Weather | — | — | — | — | — | Forecast zone |
| 5 Feb 2021 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 5 Feb 2021 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 5 Feb 2021 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 8 Nov 2020 | Winter Storm | — | — | — | — | — | Forecast zone |
| 23 Oct 2020 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 23 Oct 2020 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 16 Oct 2020 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 16 Oct 2020 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 14 Oct 2020 | Winter Weather | — | — | — | — | — | Forecast zone |
| 9 Oct 2019 | Winter Weather | — | — | — | — | — | Forecast zone |
| 24 Feb 2019 | Winter Storm | — | — | — | — | — | Forecast zone |
| 3 Feb 2019 | Winter Storm | — | — | — | — | — | Forecast zone |
| 24 Nov 2018 | Winter Storm | — | — | — | — | — | Forecast zone |
| 2 Apr 2018 | Winter Storm | — | — | — | — | — | Forecast zone |
| 15 Feb 2018 | Winter Storm | — | — | — | — | — | Forecast zone |
| 29 Dec 2017 | Winter Storm | — | — | — | — | — | Forecast zone |
| 20 Dec 2017 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 4 Dec 2017 | Winter Storm | — | — | — | — | — | Forecast zone |
| 3 Nov 2017 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 15 Sep 2017 | Winter Storm | — | — | — | — | — | Forecast zone |
| 17 May 2017 | Winter Storm | — | — | — | — | — | Forecast zone |
| 16 Dec 2016 | Winter Storm | — | — | — | — | — | Forecast zone |
| 15 Dec 2016 | Winter Storm | — | — | — | — | — | Forecast zone |
| 9 May 2016 | Winter Storm | — | — | — | — | — | Forecast zone |
| 15 Apr 2016 | Winter Storm | — | — | — | — | — | Forecast zone |
| 13 Dec 2015 | Winter Storm | — | — | — | — | — | Forecast zone |
| 24 Nov 2015 | Winter Storm | — | — | — | — | — | Forecast zone |
| 3 Nov 2015 | Winter Storm | — | — | — | — | — | Forecast zone |
| 14 Apr 2015 | Winter Storm | — | — | — | — | — | Forecast zone |
| 28 Nov 2014 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 25 Nov 2014 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 9 Nov 2014 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 17 Mar 2014 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 23 Feb 2014 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 20 Feb 2014 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 29 Jan 2014 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 27 Oct 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 3 Oct 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 2 Oct 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 25 Sep 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 25 Sep 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 9 Feb 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 9 Feb 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 26 Jan 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 10 Jan 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 10 Jan 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 10 Jan 2013 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 7 Dec 2012 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 8 Nov 2012 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 5 Apr 2012 | Winter Storm | — | — | — | — | — | Forecast zone |
| 18 Jan 2012 | Winter Storm | — | — | — | — | — | Forecast zone |
| 3 Dec 2011 | Winter Storm | — | — | — | — | — | Forecast zone |
| 9 May 2011 | Winter Storm | — | — | — | — | — | Forecast zone |
| 29 Apr 2011 | Winter Storm | — | — | — | — | — | Forecast zone |
| 21 Apr 2011 | Winter Storm | — | — | — | — | — | Forecast zone |
| 7 Apr 2011 | Winter Storm | — | — | — | — | — | Forecast zone |
| 6 Feb 2011 | Winter Storm | — | — | — | — | — | Forecast zone |
| 4 Feb 2011 | Winter Storm | — | — | — | — | — | Forecast zone |
| 22 Nov 2010 | Winter Storm | — | — | — | — | — | Forecast zone |
| 15 Nov 2010 | Winter Storm | — | — | — | — | — | Forecast zone |
| 5 May 2010 | Winter Storm | — | — | — | — | — | Forecast zone |
| 29 Apr 2010 | Winter Storm | — | — | — | — | — | Forecast zone |
| 13 Apr 2010 | Winter Storm | — | — | — | — | — | Forecast zone |
| 27 Oct 2009 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 4 Oct 2009 | Winter Storm | — | — | — | — | — | Forecast zone |
| 4 Oct 2009 | Winter Storm | — | — | — | — | — | Forecast zone |
| 27 Apr 2009 | Winter Storm | — | — | — | — | — | Forecast zone |
| 14 Apr 2009 | Winter Storm | — | — | — | — | — | Forecast zone |
| 28 Mar 2009 | Winter Storm | — | — | — | — | — | Forecast zone |
| 16 Mar 2009 | Winter Storm | — | — | — | — | — | Forecast zone |
| 13 Dec 2008 | Blizzard | — | — | — | — | — | Forecast zone |
| 11 Jun 2008 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 11 Jun 2008 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 19 Apr 2008 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 28 Jan 2008 | Winter Storm | — | — | — | — | — | Forecast zone |
| 19 Jan 2008 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 17 Jan 2008 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 19 Nov 2007 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 6 Jun 2007 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 21 May 2007 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 14 Sep 2006 | Winter Storm | — | — | — | — | — | Forecast zone |
| 23 Apr 2006 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 6 Apr 2006 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 5 Dec 2005 | Winter Storm | — | — | — | — | — | Forecast zone |
| 8 Nov 2005 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 27 Apr 2005 | Winter Storm | — | — | — | — | — | Forecast zone |
| 19 Apr 2005 | Winter Storm | — | — | — | — | — | Forecast zone |
| 13 Jan 2005 | Winter Storm | — | — | — | — | — | Forecast zone |
| 29 Dec 2004 | Winter Storm | — | — | — | — | — | Forecast zone |
| 1 Jan 2004 | Winter Storm | — | — | — | — | — | Forecast zone |
| 7 Mar 2003 | Winter Storm | — | — | — | — | — | Forecast zone |
| 3 Mar 2003 | Winter Storm | — | — | — | — | — | Forecast zone |
| 22 Jan 2003 | Winter Storm | — | — | — | — | — | Forecast zone |
| 23 Nov 2002 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 29 Oct 2002 | Winter Storm | — | — | — | — | — | Forecast zone |
| 22 May 2002 | Winter Storm | — | — | — | — | — | Forecast zone |
| 17 Apr 2002 | Winter Storm | — | — | — | — | — | Forecast zone |
| 7 Mar 2002 | Winter Storm | — | — | — | — | — | Forecast zone |
| 28 Feb 2002 | Winter Storm | — | — | — | — | — | Forecast zone |
| 23 Feb 2002 | Winter Storm | — | — | — | — | — | Forecast zone |
| 28 Dec 2001 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 13 Jun 2001 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 3 Jun 2001 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 30 Mar 2001 | Heavy Snow | — | — | — | — | — | Forecast zone |
| 15 Dec 2000 | Blizzard | — | — | — | — | — | Forecast zone |
Questions and answers
How many winter events has Jefferson County had?
109 events in the NCEI Storm Events record between 1950 and 2026. Reporting of winter storms and snow became far more complete after 1996, so early decades undercount.
When was the last recorded winter event in Jefferson County?
28 Apr 2022 (Heavy Snow). Records reach NCEI about 120 days after the month ends.
What was the most damaging winter event recorded in Jefferson County?
NCEI records no damage estimate for events of this type in the county.
How does Jefferson County compare with Montana for winter?
6.6 events per 100 square miles against 5.8 statewide; the county holds 109 of the state's 8,475 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Winter hub and the county page.