St. Mary Montana Threshold Days by Year
10 fixed thresholds counted per year at St. Mary Montana (USR0000MSTM): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for St. Mary Montana Thresholds
- St. Mary Montana: nights with a minimum temperature at or below 0 C (32 F) in 37 years, most in 2002 with 205.
- St. Mary Montana: nights with a minimum temperature at or below -10 C (14 F) in 37 years, most in 2000 with 73.
- St. Mary Montana: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 2003 with 36.
- St. Mary Montana: days with a maximum temperature at or below 0 C (32 F) in 36 years, most in 2019 with 66.
- 10 fixed thresholds have at least one qualifying day at St. Mary Montana.
Days at or above 30 C (86 F)
36 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1986 | 11 | 8 |
| 1987 | 5 | 8 |
| 1988 | 13 | 8 |
| 1989 | 3 | 8 |
| 1990 | 6 | 10.9 |
| 1991 | 8 | 10.9 |
| 1992 | 9 | 10.9 |
| 1994 | 16 | 10.9 |
| 1997 | 4 | 10.9 |
| 1998 | 26 | 10.9 |
| 1999 | 7 | 10.9 |
| 2000 | 11 | 13.7 |
| 2001 | 14 | 13.7 |
| 2002 | 10 | 13.7 |
| 2003 | 36 | 13.7 |
| 2004 | 13 | 13.7 |
| 2005 | 10 | 13.7 |
| 2006 | 15 | 13.7 |
| 2007 | 21 | 13.7 |
| 2008 | 6 | 13.7 |
| 2009 | 1 | 13.7 |
| 2010 | 1 | 7 |
| 2011 | 3 | 7 |
| 2012 | 13 | 7 |
| 2013 | 10 | 7 |
| 2014 | 6 | 7 |
| 2016 | 1 | 7 |
| 2017 | 17 | 7 |
| 2018 | 5 | 7 |
| 2019 | 7 | 7 |
| 2020 | 9 | 11.2 |
| 2021 | 17 | 11.2 |
| 2023 | 15 | 11.2 |
| 2024 | 14 | 11.2 |
| 2025 | 5 | 11.2 |
| 2026 | 7 | 11.2 |
| Year | First date | Last date |
|---|---|---|
| 1986 | 1986-05-27 | 1986-08-28 |
| 1987 | 1987-06-14 | 1987-07-30 |
| 1988 | 1988-06-25 | 1988-09-05 |
| 1989 | 1989-07-19 | 1989-08-08 |
| 1990 | 1990-07-11 | 1990-08-14 |
| 1991 | 1991-07-13 | 1991-08-31 |
| 1992 | 1992-06-23 | 1992-09-30 |
| 1994 | 1994-07-21 | 1994-08-20 |
| 1997 | 1997-08-03 | 1997-08-06 |
| 1998 | 1998-07-09 | 1998-09-15 |
| 1999 | 1999-07-27 | 1999-08-27 |
| 2000 | 2000-07-13 | 2000-08-23 |
| 2001 | 2001-07-04 | 2001-09-25 |
| 2002 | 2002-06-26 | 2002-08-24 |
| 2003 | 2003-06-18 | 2003-09-05 |
| 2004 | 2004-07-14 | 2004-08-15 |
| 2005 | 2005-06-21 | 2005-08-21 |
| 2006 | 2006-06-27 | 2006-09-05 |
| 2007 | 2007-06-28 | 2007-08-30 |
| 2008 | 2008-06-29 | 2008-08-18 |
| 2009 | 2009-09-16 | 2009-09-16 |
| 2010 | 2010-08-26 | 2010-08-26 |
| 2011 | 2011-07-17 | 2011-08-28 |
| 2012 | 2012-07-07 | 2012-08-20 |
| 2013 | 2013-07-01 | 2013-09-04 |
| 2014 | 2014-07-13 | 2014-08-12 |
| 2016 | 2016-08-30 | 2016-08-30 |
| 2017 | 2017-07-05 | 2017-09-07 |
| 2018 | 2018-07-09 | 2018-08-10 |
| 2019 | 2019-07-22 | 2019-08-21 |
| 2020 | 2020-07-27 | 2020-08-19 |
| 2021 | 2021-06-14 | 2021-08-04 |
| 2023 | 2023-07-09 | 2023-08-29 |
| 2024 | 2024-07-09 | 2024-09-02 |
| 2025 | 2025-07-01 | 2025-09-03 |
| 2026 | 2026-07-16 | 2026-08-27 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 36 | 36 | 2003 | 7 |
| 35 C (95 F): Days | 5 | 2 | 2003 | 1 |
| 90 F (32.2 C): Days | 27 | 18 | 2003 | 6 |
| 0 C (32 F): Ice days (max | 36 | 66 | 2019 | 21 |
| 0 C (32 F): Frost days (min | 37 | 205 | 2002 | 104 |
| -10 C (14 F): Days with min | 37 | 73 | 2000 | 17 |
| -20 C (-4 F): Days with min | 36 | 31 | 2019 | 9 |
| -30 C (-22 F): Days with min | 31 | 10 | 1990 | 2 |
| -40 C (-40 F): Days with min | 2 | 2 | 2024 | 2 |
| 20 C (68 F): Tropical nights (min | 3 | 1 | 1998 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1986.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-16).