Bristol AP Threshold Days by Year (USW00013877)

15 fixed thresholds counted per year at Bristol AP (USW00013877): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bristol AP Thresholds

Bristol AP: days with a maximum temperature at or above 30 C (86 F) in 89 years, most in 2016 with 97.
Bristol AP: nights with a minimum temperature at or below 0 C (32 F) in 89 years, most in 1996 with 119.
Bristol AP: days with 10 mm (0.39 in) or more of precipitation in 89 years, most in 2019 with 54.
Bristol AP: days with 25 mm (0.98 in) or more of precipitation in 89 years, most in 2003 with 19.
15 fixed thresholds have at least one qualifying day at Bristol AP.

Days at or above 30 C (86 F)

89 years with a qualifying day

Days per year at Bristol AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 97 in 2016.

Days at or above 30 C (86 F) per year at Bristol AP
Year	Days	Decade average
1938	56	61.5
1939	67	61.5
1940	52	64.6
1941	87	64.6
1942	74	64.6
1943	82	64.6
1944	82	64.6
1945	68	64.6
1946	36	64.6
1947	61	64.6
1948	46	64.6
1949	58	64.6
1950	25	67.2
1951	54	67.2
1952	72	67.2
1953	77	67.2
1954	87	67.2
1955	76	67.2
1956	64	67.2
1957	76	67.2
1958	58	67.2
1959	83	67.2
1960	61	47.5
1961	49	47.5
1962	64	47.5
1963	25	47.5
1964	65	47.5
1965	53	47.5
1966	39	47.5
1967	13	47.5
1968	56	47.5
1969	50	47.5
1970	81	42.5
1971	42	42.5
1972	32	42.5
1973	42	42.5
1974	26	42.5
1975	50	42.5
1976	29	42.5
1977	60	42.5
1978	50	42.5
1979	13	42.5
1980	75	47.4
1981	32	47.4
1982	21	47.4
1983	36	47.4
1984	28	47.4
1985	28	47.4
1986	69	47.4
1987	76	47.4
1988	73	47.4
1989	36	47.4
1990	51	48
1991	52	48
1992	23	48
1993	65	48
1994	39	48
1995	62	48
1996	29	48
1997	33	48
1998	63	48
1999	63	48
2000	35	52.4
2001	36	52.4
2002	82	52.4
2003	35	52.4
2004	34	52.4
2005	65	52.4
2006	58	52.4
2007	87	52.4
2008	61	52.4
2009	31	52.4
2010	95	74.6
2011	80	74.6
2012	70	74.6
2013	29	74.6
2014	57	74.6
2015	77	74.6
2016	97	74.6
2017	66	74.6
2018	81	74.6
2019	94	74.6
2020	64	69.3
2021	75	69.3
2022	73	69.3
2023	52	69.3
2024	72	69.3
2025	58	69.3
2026	91	69.3

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

First to last qualifying date each year at Bristol AP
Year	First date	Last date
1938	1938-05-03	1938-09-12
1939	1939-06-01	1939-10-09
1940	1940-05-07	1940-09-23
1941	1941-04-19	1941-10-09
1942	1942-04-27	1942-09-19
1943	1943-05-07	1943-09-15
1944	1944-04-22	1944-09-04
1945	1945-05-16	1945-09-30
1946	1946-06-09	1946-09-09
1947	1947-05-16	1947-09-21
1948	1948-04-25	1948-09-21
1949	1949-05-05	1949-10-08
1950	1950-05-05	1950-09-03
1951	1951-05-01	1951-10-06
1952	1952-05-05	1952-09-14
1953	1953-04-24	1953-10-01
1954	1954-05-02	1954-10-13
1955	1955-04-18	1955-09-23
1956	1956-04-27	1956-09-17
1957	1957-04-25	1957-09-22
1958	1958-05-03	1958-09-16
1959	1959-05-02	1959-10-06
1960	1960-04-23	1960-09-21
1961	1961-06-02	1961-09-25
1962	1962-05-08	1962-09-15
1963	1963-05-09	1963-09-21
1964	1964-05-08	1964-09-11
1965	1965-05-25	1965-09-23
1966	1966-06-06	1966-09-03
1967	1967-06-13	1967-09-20
1968	1968-06-10	1968-09-24
1969	1969-05-29	1969-08-31
1970	1970-04-30	1970-09-26
1971	1971-06-01	1971-09-29
1972	1972-06-05	1972-09-25
1973	1973-06-03	1973-09-28
1974	1974-05-14	1974-08-29
1975	1975-05-25	1975-09-11
1976	1976-04-19	1976-09-09
1977	1977-05-16	1977-09-06
1978	1978-05-26	1978-09-22
1979	1979-06-08	1979-08-31
1980	1980-04-23	1980-09-24
1981	1981-04-13	1981-09-03
1982	1982-05-13	1982-08-06
1983	1983-06-25	1983-09-11
1984	1984-04-26	1984-09-22
1985	1985-05-14	1985-09-09
1986	1986-04-26	1986-09-29
1987	1987-05-17	1987-09-15
1988	1988-05-30	1988-09-15
1989	1989-06-01	1989-09-11
1990	1990-04-26	1990-09-12
1991	1991-05-15	1991-09-18
1992	1992-06-07	1992-09-21
1993	1993-06-08	1993-09-14
1994	1994-04-28	1994-09-16
1995	1995-04-10	1995-09-13
1996	1996-04-29	1996-08-23
1997	1997-06-20	1997-09-19
1998	1998-05-15	1998-09-30
1999	1999-06-05	1999-09-13
2000	2000-05-12	2000-09-20
2001	2001-04-10	2001-09-07
2002	2002-04-16	2002-10-03
2003	2003-06-11	2003-09-01
2004	2004-05-09	2004-09-23
2005	2005-06-05	2005-09-25
2006	2006-05-28	2006-08-30
2007	2007-05-01	2007-10-08
2008	2008-05-31	2008-09-14
2009	2009-04-26	2009-09-24
2010	2010-04-02	2010-09-24
2011	2011-05-12	2011-09-26
2012	2012-05-02	2012-09-07
2013	2013-05-21	2013-09-11
2014	2014-05-05	2014-09-11
2015	2015-05-06	2015-09-09
2016	2016-05-27	2016-10-19
2017	2017-04-28	2017-10-11
2018	2018-05-13	2018-10-08
2019	2019-05-18	2019-10-04
2020	2020-05-16	2020-09-13
2021	2021-05-20	2021-09-19
2022	2022-04-23	2022-09-21
2023	2023-04-05	2023-10-04
2024	2024-05-02	2024-09-23
2025	2025-04-03	2025-09-20
2026	2026-04-15	2026-10-14

Every Fixed Threshold

Fixed thresholds at Bristol AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	89	97	2016	91
35 C (95 F): Days	43	18	1988	7
90 F (32.2 C): Days	86	62	2016	42
100 F (37.8 C): Days	4	4	1988	3
0 C (32 F): Ice days (max	86	28	1977	10
0 C (32 F): Frost days (min	89	119	1996	57
-10 C (14 F): Days with min	84	34	1977	9
-20 C (-4 F): Days with min	20	3	1962	1
20 C (68 F): Tropical nights (min	88	37	2010	30
25 C (77 F): Days with min	2	1	1941	1
10 mm (0.39 in): Days with 10 mm or more rain	89	54	2019	30
25 mm (0.98 in): Days with 25 mm or more rain	89	19	2003	7
50 mm (1.97 in): Days with 50 mm or more rain	56	4	2013	2
10 cm (3.9 in): Days with 10 cm or more snowfall	43	4	1947	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	2	1996	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

Data for Bristol AP 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).

Bristol AP Threshold Days by Year (USW00013877)

Key Facts for Bristol AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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