Boise 7 N Threshold Days by Year (USC00101017)

16 fixed thresholds counted per year at Boise 7 N (USC00101017): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Boise 7 N Thresholds

Boise 7 N: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 1986 with 74.
Boise 7 N: days with a maximum temperature at or above 35 C (95 F) in 50 years, most in 1988 with 26.
Boise 7 N: days with a maximum temperature at or above 90 F (32.2 C) in 50 years, most in 1986 with 53.
Boise 7 N: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1985 with 162.
16 fixed thresholds have at least one qualifying day at Boise 7 N.

Days at or above 30 C (86 F)

50 years with a qualifying day

Days per year at Boise 7 N with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 1986.

Days at or above 30 C (86 F) per year at Boise 7 N
Year	Days	Decade average
1974	58	50.7
1975	44	50.7
1976	41	50.7
1977	64	50.7
1978	39	50.7
1979	58	50.7
1980	35	59.7
1981	66	59.7
1982	56	59.7
1983	52	59.7
1984	64	59.7
1985	54	59.7
1986	74	59.7
1987	72	59.7
1988	70	59.7
1989	54	59.7
1990	67	47.7
1991	60	47.7
1992	59	47.7
1993	26	47.7
1994	63	47.7
1995	32	47.7
1996	46	47.7
1997	32	47.7
1998	52	47.7
1999	40	47.7
2000	46	53.2
2001	62	53.2
2002	46	53.2
2003	60	53.2
2004	42	53.2
2005	50	53.2
2006	59	53.2
2007	61	53.2
2008	53	53.2
2009	53	53.2
2010	40	49.4
2011	40	49.4
2012	57	49.4
2013	66	49.4
2014	45	49.4
2015	44	49.4
2016	49	49.4
2017	66	49.4
2018	48	49.4
2019	39	49.4
2020	37	50
2024	66	50
2025	59	50
2026	38	50

For each year, a bar from the first to the last day at Boise 7 N meeting 30 C (86 F).

First to last qualifying date each year at Boise 7 N
Year	First date	Last date
1974	1974-06-10	1974-09-07
1975	1975-05-14	1975-09-14
1976	1976-06-19	1976-09-30
1977	1977-04-23	1977-09-08
1978	1978-06-22	1978-09-26
1979	1979-05-22	1979-09-21
1980	1980-05-21	1980-09-06
1981	1981-06-05	1981-09-18
1982	1982-06-11	1982-09-09
1983	1983-05-24	1983-09-13
1984	1984-05-29	1984-09-19
1985	1985-06-07	1985-08-29
1986	1986-05-25	1986-09-07
1987	1987-04-27	1987-09-24
1988	1988-05-12	1988-09-09
1989	1989-05-06	1989-09-29
1990	1990-06-09	1990-09-24
1991	1991-06-10	1991-09-06
1992	1992-05-05	1992-10-01
1993	1993-05-11	1993-09-10
1994	1994-06-11	1994-09-24
1995	1995-06-25	1995-09-15
1996	1996-06-07	1996-09-12
1997	1997-07-05	1997-10-01
1998	1998-06-30	1998-09-17
1999	1999-06-14	1999-09-16
2000	2000-06-04	2000-09-15
2001	2001-05-12	2001-09-24
2002	2002-06-14	2002-09-15
2003	2003-05-23	2003-09-06
2004	2004-06-03	2004-09-01
2005	2005-06-20	2005-09-08
2006	2006-05-15	2006-09-12
2007	2007-05-16	2007-09-03
2008	2008-05-17	2008-09-20
2009	2009-05-18	2009-09-25
2010	2010-06-28	2010-10-02
2011	2011-06-22	2011-09-24
2012	2012-06-04	2012-09-14
2013	2013-05-12	2013-09-04
2014	2014-06-12	2014-09-17
2015	2015-05-31	2015-09-25
2016	2016-06-01	2016-09-28
2017	2017-05-30	2017-09-08
2018	2018-06-03	2018-09-07
2019	2019-07-06	2019-09-05
2020	2020-05-29	2020-09-13
2024	2024-06-06	2024-09-27
2025	2025-05-29	2025-09-05
2026	2026-05-12	2026-08-12

Every Fixed Threshold

Fixed thresholds at Boise 7 N
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	50	74	1986	38
35 C (95 F): Days	50	26	1988	13
40 C (104 F): Days	10	3	2002	1
90 F (32.2 C): Days	50	53	1986	28
100 F (37.8 C): Days	35	8	2024	3
0 C (32 F): Ice days (max	49	70	1985	9
0 C (32 F): Frost days (min	50	162	1985	3
-10 C (14 F): Days with min	49	60	1985	11
-20 C (-4 F): Days with min	16	9	1990	3
-30 C (-22 F): Days with min	1	2	1990	2
20 C (68 F): Tropical nights (min	49	13	2024	5
25 C (77 F): Days with min	10	3	1984	1
10 mm (0.39 in): Days with 10 mm or more rain	50	23	1998	1
25 mm (0.98 in): Days with 25 mm or more rain	36	4	1996	1
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1976	1
10 cm (3.9 in): Days with 10 cm or more snowfall	30	6	2010	6

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1974.

Download the Data

Data for Boise 7 N 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Boise 7 N Threshold Days by Year (USC00101017)

Key Facts for Boise 7 N Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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