Bristow Threshold Days by Year (USC00341144)

19 fixed thresholds counted per year at Bristow (USC00341144): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bristow Thresholds

Bristow: days with 10 mm (0.39 in) or more of precipitation in 87 years, most in 1987 with 42.
Bristow: days with 25 mm (0.98 in) or more of precipitation in 87 years, most in 1990 with 20.
Bristow: days with 50 mm (1.97 in) or more of precipitation in 82 years, most in 1941 with 10.
Bristow: days with a maximum temperature at or above 30 C (86 F) in 75 years, most in 1956 with 147.
19 fixed thresholds have at least one qualifying day at Bristow.

Days at or above 30 C (86 F)

75 years with a qualifying day

Days per year at Bristow with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 147 in 1956.

Days at or above 30 C (86 F) per year at Bristow
Year	Days	Decade average
1916	133	133
1927	107	105.5
1929	104	105.5
1931	124	115.7
1932	112	115.7
1933	112	115.7
1934	112	115.7
1935	88	115.7
1936	123	115.7
1937	108	115.7
1938	126	115.7
1939	136	115.7
1940	95	98.3
1941	97	98.3
1942	91	98.3
1943	115	98.3
1944	103	98.3
1945	94	98.3
1946	90	98.3
1948	111	98.3
1949	89	98.3
1950	78	111.6
1951	94	111.6
1952	123	111.6
1953	128	111.6
1954	134	111.6
1955	119	111.6
1956	147	111.6
1957	93	111.6
1958	88	111.6
1960	117	110.1
1961	87	110.1
1962	127	110.1
1963	146	110.1
1964	111	110.1
1965	108	110.1
1966	104	110.1
1967	95	110.1
1968	102	110.1
1969	104	110.1
1970	103	111.9
1972	118	111.9
1973	114	111.9
1974	94	111.9
1975	108	111.9
1976	110	111.9
1977	128	111.9
1978	107	111.9
1979	125	111.9
1980	134	113.7
1985	108	113.7
1986	103	113.7
1987	124	113.7
1988	119	113.7
1989	94	113.7
1990	108	98.5
1991	103	98.5
1992	72	98.5
1993	87	98.5
1994	100	98.5
1995	93	98.5
1996	102	98.5
1997	99	98.5
1998	132	98.5
1999	89	98.5
2000	112	100.1
2001	109	100.1
2003	97	100.1
2004	91	100.1
2005	120	100.1
2006	123	100.1
2007	77	100.1
2009	72	100.1
2010	100	91.5
2011	83	91.5

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

First to last qualifying date each year at Bristow
Year	First date	Last date
1916	1916-03-13	1916-11-03
1927	1927-04-10	1927-10-26
1929	1929-03-25	1929-10-17
1931	1931-05-15	1931-10-11
1932	1932-04-02	1932-10-18
1933	1933-04-09	1933-09-30
1934	1934-04-10	1934-10-21
1935	1935-05-12	1935-10-02
1936	1936-04-12	1936-10-19
1937	1937-04-16	1937-10-30
1938	1938-04-18	1938-10-31
1939	1939-04-09	1939-10-25
1940	1940-03-31	1940-10-24
1941	1941-05-08	1941-10-21
1942	1942-04-04	1942-09-23
1943	1943-04-04	1943-09-25
1944	1944-05-12	1944-10-26
1945	1945-05-13	1945-11-06
1946	1946-03-31	1946-10-08
1948	1948-04-16	1948-10-31
1949	1949-04-07	1949-09-21
1950	1950-04-03	1950-10-31
1951	1951-03-22	1951-10-04
1952	1952-04-30	1952-10-26
1953	1953-04-22	1953-10-18
1954	1954-03-11	1954-10-18
1955	1955-03-10	1955-10-23
1956	1956-03-05	1956-10-12
1957	1957-05-14	1957-10-04
1958	1958-04-23	1958-10-19
1960	1960-04-06	1960-10-14
1961	1961-04-21	1961-10-12
1962	1962-02-12	1962-10-22
1963	1963-03-28	1963-10-27
1964	1964-04-12	1964-10-21
1965	1965-04-10	1965-10-11
1966	1966-03-31	1966-10-13
1967	1967-03-10	1967-10-07
1968	1968-04-17	1968-10-14
1969	1969-05-21	1969-10-05
1970	1970-04-27	1970-10-03
1972	1972-04-06	1972-10-18
1973	1973-05-09	1973-10-24
1974	1974-03-07	1974-10-18
1975	1975-04-17	1975-10-21
1976	1976-03-02	1976-10-12
1977	1977-04-08	1977-10-26
1978	1978-04-01	1978-10-22
1979	1979-04-15	1979-10-22
1980	1980-04-07	1980-11-06
1985	1985-03-28	1985-10-12
1986	1986-04-06	1986-10-02
1987	1987-04-17	1987-09-25
1988	1988-04-04	1988-10-18
1989	1989-03-11	1989-10-14
1990	1990-05-14	1990-10-06
1991	1991-03-05	1991-10-23
1992	1992-04-09	1992-10-14
1993	1993-05-15	1993-09-23
1994	1994-03-19	1994-10-04
1995	1995-03-22	1995-10-16
1996	1996-02-22	1996-09-22
1997	1997-03-21	1997-10-06
1998	1998-05-12	1998-10-05
1999	1999-04-19	1999-10-15
2000	2000-04-05	2000-10-13
2001	2001-04-03	2001-10-23
2003	2003-04-18	2003-10-24
2004	2004-05-06	2004-10-22
2005	2005-05-10	2005-11-07
2006	2006-03-01	2006-10-04
2007	2007-04-02	2007-10-05
2009	2009-04-22	2009-09-27
2010	2010-05-06	2010-10-18
2011	2011-04-08	2011-10-17

Every Fixed Threshold

Fixed thresholds at Bristow
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	75	147	1956	83
35 C (95 F): Days	74	95	1954	48
40 C (104 F): Days	43	32	1954	10
45 C (113 F): Days	2	3	1936	3
90 F (32.2 C): Days	75	120	1956	69
100 F (37.8 C): Days	66	66	1980	31
110 F (43.3 C): Days	8	7	1936	1
0 C (32 F): Ice days (max	73	20	1978	13
0 C (32 F): Frost days (min	75	108	1976	92
-10 C (14 F): Days with min	73	28	1963	18
-20 C (-4 F): Days with min	15	3	1979	2
20 C (68 F): Tropical nights (min	75	103	1998	61
25 C (77 F): Days with min	58	25	1936	10
10 mm (0.39 in): Days with 10 mm or more rain	87	42	1987	26
25 mm (0.98 in): Days with 25 mm or more rain	87	20	1990	9
50 mm (1.97 in): Days with 50 mm or more rain	82	10	1941	3
100 mm (3.94 in): Days with 100 mm or more rain	26	2	1942	1
10 cm (3.9 in): Days with 10 cm or more snowfall	41	2	1929	2
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1989	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.

Download the Data

Data for Bristow 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).

Bristow Threshold Days by Year (USC00341144)

Key Facts for Bristow Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related