Triangle Idaho Threshold Days by Year
11 fixed thresholds counted per year at Triangle Idaho (USR0000ITRI): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Triangle Idaho Thresholds
- Triangle Idaho: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 2021 with 56.
- Triangle Idaho: days with a maximum temperature at or above 90 F (32.2 C) in 36 years, most in 2021 with 38.
- Triangle Idaho: days with a maximum temperature at or below 0 C (32 F) in 36 years, most in 1993 with 42.
- Triangle Idaho: nights with a minimum temperature at or below 0 C (32 F) in 36 years, most in 2022 with 223.
- 11 fixed thresholds have at least one qualifying day at Triangle Idaho.
Days at or above 30 C (86 F)
36 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1991 | 32 | 29.3 |
| 1992 | 29 | 29.3 |
| 1993 | 8 | 29.3 |
| 1994 | 49 | 29.3 |
| 1995 | 28 | 29.3 |
| 1996 | 37 | 29.3 |
| 1997 | 22 | 29.3 |
| 1998 | 36 | 29.3 |
| 1999 | 23 | 29.3 |
| 2000 | 34 | 38.7 |
| 2001 | 42 | 38.7 |
| 2002 | 36 | 38.7 |
| 2003 | 44 | 38.7 |
| 2004 | 29 | 38.7 |
| 2005 | 38 | 38.7 |
| 2006 | 42 | 38.7 |
| 2007 | 52 | 38.7 |
| 2008 | 34 | 38.7 |
| 2009 | 36 | 38.7 |
| 2010 | 34 | 40 |
| 2011 | 30 | 40 |
| 2012 | 54 | 40 |
| 2013 | 53 | 40 |
| 2014 | 34 | 40 |
| 2015 | 35 | 40 |
| 2016 | 38 | 40 |
| 2017 | 50 | 40 |
| 2018 | 38 | 40 |
| 2019 | 34 | 40 |
| 2020 | 35 | 45 |
| 2021 | 56 | 45 |
| 2022 | 55 | 45 |
| 2023 | 31 | 45 |
| 2024 | 51 | 45 |
| 2025 | 36 | 45 |
| 2026 | 51 | 45 |
| Year | First date | Last date |
|---|---|---|
| 1991 | 1991-07-03 | 1991-09-05 |
| 1992 | 1992-06-21 | 1992-09-30 |
| 1993 | 1993-06-26 | 1993-09-10 |
| 1994 | 1994-06-11 | 1994-09-07 |
| 1995 | 1995-06-26 | 1995-09-15 |
| 1996 | 1996-06-07 | 1996-09-10 |
| 1997 | 1997-07-05 | 1997-08-30 |
| 1998 | 1998-07-07 | 1998-09-15 |
| 1999 | 1999-07-06 | 1999-08-29 |
| 2000 | 2000-06-28 | 2000-09-14 |
| 2001 | 2001-05-24 | 2001-09-24 |
| 2002 | 2002-06-15 | 2002-09-15 |
| 2003 | 2003-05-28 | 2003-09-03 |
| 2004 | 2004-06-23 | 2004-08-31 |
| 2005 | 2005-06-20 | 2005-09-08 |
| 2006 | 2006-06-25 | 2006-09-12 |
| 2007 | 2007-06-02 | 2007-09-12 |
| 2008 | 2008-05-17 | 2008-08-25 |
| 2009 | 2009-05-18 | 2009-09-24 |
| 2010 | 2010-06-28 | 2010-10-02 |
| 2011 | 2011-06-27 | 2011-09-30 |
| 2012 | 2012-06-17 | 2012-09-22 |
| 2013 | 2013-06-06 | 2013-09-01 |
| 2014 | 2014-07-01 | 2014-09-16 |
| 2015 | 2015-06-08 | 2015-09-25 |
| 2016 | 2016-06-05 | 2016-08-30 |
| 2017 | 2017-06-07 | 2017-09-07 |
| 2018 | 2018-06-13 | 2018-09-06 |
| 2019 | 2019-07-10 | 2019-09-05 |
| 2020 | 2020-05-29 | 2020-09-17 |
| 2021 | 2021-06-02 | 2021-09-09 |
| 2022 | 2022-06-27 | 2022-09-27 |
| 2023 | 2023-07-01 | 2023-08-29 |
| 2024 | 2024-06-22 | 2024-09-28 |
| 2025 | 2025-05-31 | 2025-09-04 |
| 2026 | 2026-06-16 | 2026-10-05 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 36 | 56 | 2021 | 51 |
| 35 C (95 F): Days | 28 | 16 | 2003 | 10 |
| 40 C (104 F): Days | 1 | 1 | 2003 | 1 |
| 90 F (32.2 C): Days | 36 | 38 | 2021 | 26 |
| 100 F (37.8 C): Days | 5 | 3 | 2002 | 1 |
| 0 C (32 F): Ice days (max | 36 | 42 | 1993 | 9 |
| 0 C (32 F): Frost days (min | 36 | 223 | 2022 | 121 |
| -10 C (14 F): Days with min | 36 | 80 | 2022 | 15 |
| -20 C (-4 F): Days with min | 30 | 10 | 1993 | 3 |
| -30 C (-22 F): Days with min | 2 | 1 | 1996 | 1 |
| 20 C (68 F): Tropical nights (min | 3 | 1 | 1994 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1991.
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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-15).