Grace Idaho Threshold Days by Year (USR0000IGRA)

10 fixed thresholds counted per year at Grace Idaho (USR0000IGRA): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grace Idaho Thresholds

Grace Idaho: days with a maximum temperature at or below 0 C (32 F) in 39 years, most in 2022 with 67.
Grace Idaho: nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 2011 with 190.
Grace Idaho: nights with a minimum temperature at or below -10 C (14 F) in 39 years, most in 2022 with 53.
Grace Idaho: days with a maximum temperature at or above 30 C (86 F) in 38 years, most in 2007 with 61.
10 fixed thresholds have at least one qualifying day at Grace Idaho.

Days at or above 30 C (86 F)

38 years with a qualifying day

Days per year at Grace Idaho with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 61 in 2007.

Days at or above 30 C (86 F) per year at Grace Idaho
Year	Days	Decade average
1987	10	26
1988	45	26
1989	23	26
1990	36	27
1991	27	27
1992	24	27
1994	38	27
1995	22	27
1997	12	27
1998	35	27
1999	22	27
2000	43	40.9
2001	57	40.9
2002	38	40.9
2003	56	40.9
2004	25	40.9
2005	31	40.9
2006	37	40.9
2007	61	40.9
2008	32	40.9
2009	29	40.9
2010	30	35.2
2011	26	35.2
2012	59	35.2
2013	53	35.2
2014	23	35.2
2015	21	35.2
2016	34	35.2
2017	36	35.2
2018	45	35.2
2019	25	35.2
2020	37	40.7
2021	48	40.7
2022	51	40.7
2023	23	40.7
2024	40	40.7
2025	43	40.7
2026	43	40.7

For each year, a bar from the first to the last day at Grace Idaho meeting 30 C (86 F).

First to last qualifying date each year at Grace Idaho
Year	First date	Last date
1987	1987-07-15	1987-09-01
1988	1988-06-16	1988-09-09
1989	1989-06-15	1989-08-07
1990	1990-06-23	1990-09-14
1991	1991-07-03	1991-09-05
1992	1992-06-22	1992-08-21
1994	1994-06-19	1994-09-08
1995	1995-07-08	1995-09-16
1997	1997-07-08	1997-09-09
1998	1998-07-02	1998-09-07
1999	1999-07-03	1999-08-27
2000	2000-06-05	2000-09-16
2001	2001-06-08	2001-09-25
2002	2002-05-31	2002-09-04
2003	2003-05-28	2003-09-04
2004	2004-07-10	2004-09-01
2005	2005-07-05	2005-09-08
2006	2006-06-06	2006-09-04
2007	2007-06-15	2007-09-03
2008	2008-06-21	2008-08-30
2009	2009-06-30	2009-09-03
2010	2010-06-28	2010-10-01
2011	2011-06-28	2011-09-30
2012	2012-06-17	2012-09-03
2013	2013-06-09	2013-09-05
2014	2014-07-02	2014-08-18
2015	2015-06-24	2015-08-29
2016	2016-06-20	2016-08-31
2017	2017-06-20	2017-09-04
2018	2018-06-13	2018-09-05
2019	2019-07-11	2019-09-05
2020	2020-07-11	2020-09-14
2021	2021-06-03	2021-09-10
2022	2022-06-27	2022-09-12
2023	2023-07-09	2023-08-29
2024	2024-06-13	2024-09-28
2025	2025-06-15	2025-09-03
2026	2026-06-19	2026-08-27

Every Fixed Threshold

Fixed thresholds at Grace Idaho
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	38	61	2007	43
35 C (95 F): Days	22	17	2003	12
90 F (32.2 C): Days	37	42	2007	30
100 F (37.8 C): Days	3	1	2002	1
0 C (32 F): Ice days (max	39	67	2022	9
0 C (32 F): Frost days (min	39	190	2011	79
-10 C (14 F): Days with min	39	53	2022	6
-20 C (-4 F): Days with min	14	8	1990	3
-30 C (-22 F): Days with min	1	1	1990	1
20 C (68 F): Tropical nights (min	27	15	2003	13

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1987.

Download the Data

Data for Grace Idaho threshold days by year: CSV or JSON. Field meanings are on the data page.

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Grace Idaho Threshold Days by Year (USR0000IGRA)

Key Facts for Grace Idaho Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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