Bruneau Threshold Days by Year (USC00101195)

17 fixed thresholds counted per year at Bruneau (USC00101195): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bruneau Thresholds

Bruneau: days with a maximum temperature at or above 30 C (86 F) in 48 years, most in 2003 with 99.
Bruneau: days with a maximum temperature at or above 35 C (95 F) in 48 years, most in 1970 with 58.
Bruneau: days with a maximum temperature at or above 90 F (32.2 C) in 48 years, most in 1967 with 82.
Bruneau: days with a maximum temperature at or above 100 F (37.8 C) in 48 years, most in 1969 with 27.
17 fixed thresholds have at least one qualifying day at Bruneau.

Days at or above 30 C (86 F)

48 years with a qualifying day

Days per year at Bruneau with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 2003.

Days at or above 30 C (86 F) per year at Bruneau
Year	Days	Decade average
1939	98	98
1940	93	79.5
1942	68	79.5
1943	68	79.5
1944	89	79.5
1963	92	86.5
1965	68	86.5
1966	93	86.5
1967	96	86.5
1968	72	86.5
1969	98	86.5
1970	90	85.3
1971	88	85.3
1972	87	85.3
1973	94	85.3
1974	95	85.3
1975	78	85.3
1976	64	85.3
1978	75	85.3
1979	97	85.3
1980	84	84.4
1981	89	84.4
1982	77	84.4
1983	76	84.4
1984	87	84.4
1985	75	84.4
1986	87	84.4
1987	90	84.4
1988	97	84.4
1989	82	84.4
1990	86	79.7
1991	84	79.7
1992	85	79.7
1994	94	79.7
1995	73	79.7
1996	72	79.7
1997	86	79.7
1998	64	79.7
1999	73	79.7
2000	81	83.8
2001	88	83.8
2002	71	83.8
2003	99	83.8
2004	77	83.8
2005	73	83.8
2006	88	83.8
2009	93	83.8
2011	92	92

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

First to last qualifying date each year at Bruneau
Year	First date	Last date
1939	1939-04-21	1939-09-27
1940	1940-04-13	1940-09-16
1942	1942-04-20	1942-10-09
1943	1943-04-18	1943-10-04
1944	1944-05-05	1944-10-12
1963	1963-05-18	1963-10-03
1965	1965-05-28	1965-10-09
1966	1966-05-02	1966-09-24
1967	1967-05-17	1967-09-29
1968	1968-05-19	1968-09-18
1969	1969-04-21	1969-09-27
1970	1970-05-04	1970-10-03
1971	1971-05-01	1971-09-11
1972	1972-05-14	1972-09-18
1973	1973-05-12	1973-09-29
1974	1974-05-25	1974-10-02
1975	1975-05-14	1975-10-05
1976	1976-05-13	1976-09-30
1978	1978-05-13	1978-09-30
1979	1979-05-14	1979-10-07
1980	1980-04-17	1980-10-07
1981	1981-04-30	1981-09-19
1982	1982-05-25	1982-09-23
1983	1983-05-23	1983-09-25
1984	1984-04-16	1984-09-19
1985	1985-04-14	1985-08-30
1986	1986-05-18	1986-09-07
1987	1987-04-22	1987-10-02
1988	1988-04-12	1988-10-07
1989	1989-04-19	1989-10-10
1990	1990-04-15	1990-10-04
1991	1991-06-10	1991-10-16
1992	1992-04-26	1992-10-02
1994	1994-04-20	1994-09-28
1995	1995-05-29	1995-09-17
1996	1996-06-02	1996-10-10
1997	1997-05-10	1997-10-01
1998	1998-04-23	1998-09-19
1999	1999-05-23	1999-09-22
2000	2000-04-27	2000-09-18
2001	2001-04-26	2001-09-24
2002	2002-05-13	2002-09-16
2003	2003-05-22	2003-10-21
2004	2004-05-02	2004-10-08
2005	2005-05-27	2005-09-30
2006	2006-05-14	2006-09-12
2009	2009-04-21	2009-09-29
2011	2011-05-13	2011-10-02

Every Fixed Threshold

Fixed thresholds at Bruneau
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	48	99	2003	92
35 C (95 F): Days	48	58	1970	52
40 C (104 F): Days	38	6	1978	3
45 C (113 F): Days	1	1	2002	1
90 F (32.2 C): Days	48	82	1967	74
100 F (37.8 C): Days	48	27	1969	16
110 F (43.3 C): Days	4	2	2002	1
0 C (32 F): Ice days (max	47	62	1985	5
0 C (32 F): Frost days (min	45	161	1985	102
-10 C (14 F): Days with min	44	52	1985	6
-20 C (-4 F): Days with min	16	9	1972	3
-30 C (-22 F): Days with min	3	4	1990	4
20 C (68 F): Tropical nights (min	39	10	1984	2
25 C (77 F): Days with min	3	2	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	45	11	1995	5
25 mm (0.98 in): Days with 25 mm or more rain	12	3	1968	1
10 cm (3.9 in): Days with 10 cm or more snowfall	8	2	1942	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

Data for Bruneau 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Bruneau Threshold Days by Year (USC00101195)

Key Facts for Bruneau Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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