Bowman Threshold Days by Year (USC00320995)

19 fixed thresholds counted per year at Bowman (USC00320995): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bowman Thresholds

Bowman: days with 10 mm (0.39 in) or more of precipitation in 102 years, most in 2013 with 23.
Bowman: days with a maximum temperature at or above 30 C (86 F) in 97 years, most in 2021 with 69.
Bowman: days with a maximum temperature at or above 90 F (32.2 C) in 97 years, most in 2021 with 51.
Bowman: days with a maximum temperature at or below 0 C (32 F) in 97 years, most in 1978 with 107.
19 fixed thresholds have at least one qualifying day at Bowman.

Days at or above 30 C (86 F)

97 years with a qualifying day

Days per year at Bowman with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 69 in 2021.

Days at or above 30 C (86 F) per year at Bowman
Year	Days	Decade average
1915	4	33.5
1916	30	33.5
1918	37	33.5
1919	63	33.5
1921	53	33.2
1922	39	33.2
1923	22	33.2
1924	16	33.2
1925	36	33.2
1930	42	46.9
1931	46	46.9
1932	38	46.9
1933	50	46.9
1934	56	46.9
1935	43	46.9
1939	53	46.9
1940	46	39.5
1941	44	39.5
1942	21	39.5
1943	36	39.5
1944	26	39.5
1945	39	39.5
1946	43	39.5
1947	48	39.5
1948	39	39.5
1949	53	39.5
1950	27	37.8
1951	27	37.8
1952	50	37.8
1953	36	37.8
1954	42	37.8
1955	53	37.8
1956	35	37.8
1957	32	37.8
1960	49	34.2
1961	56	34.2
1962	18	34.2
1963	35	34.2
1964	34	34.2
1965	21	34.2
1966	36	34.2
1967	33	34.2
1968	28	34.2
1969	32	34.2
1970	45	29.9
1971	30	29.9
1975	22	29.9
1976	40	29.9
1977	23	29.9
1978	29	29.9
1979	20	29.9
1980	41	35.9
1981	32	35.9
1982	25	35.9
1983	46	35.9
1984	36	35.9
1985	23	35.9
1986	26	35.9
1987	33	35.9
1988	56	35.9
1989	41	35.9
1990	45	34
1991	34	34
1992	20	34
1993	8	34
1994	33	34
1995	39	34
1996	36	34
1997	39	34
1998	52	34
1999	34	34
2000	49	42.6
2001	48	42.6
2002	54	42.6
2004	30	42.6
2005	39	42.6
2006	51	42.6
2007	46	42.6
2008	42	42.6
2009	24	42.6
2010	30	35.8
2011	42	35.8
2012	53	35.8
2013	31	35.8
2014	18	35.8
2015	36	35.8
2016	37	35.8
2017	46	35.8
2018	37	35.8
2019	28	35.8
2020	51	51
2021	69	51
2022	48	51
2023	38	51
2024	53	51
2025	38	51
2026	60	51

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

First to last qualifying date each year at Bowman
Year	First date	Last date
1915	1915-06-16	1915-09-01
1916	1916-07-02	1916-09-08
1918	1918-05-04	1918-10-14
1919	1919-05-25	1919-09-16
1921	1921-06-11	1921-09-02
1922	1922-06-04	1922-10-04
1923	1923-07-07	1923-09-22
1924	1924-07-10	1924-09-23
1925	1925-05-20	1925-09-25
1930	1930-06-17	1930-09-22
1931	1931-05-14	1931-09-08
1932	1932-05-13	1932-09-08
1933	1933-05-31	1933-09-18
1934	1934-05-05	1934-10-07
1935	1935-06-29	1935-09-22
1939	1939-04-30	1939-09-21
1940	1940-05-11	1940-09-17
1941	1941-05-18	1941-09-19
1942	1942-07-07	1942-09-09
1943	1943-05-28	1943-09-28
1944	1944-05-13	1944-08-28
1945	1945-06-21	1945-09-05
1946	1946-06-09	1946-10-01
1947	1947-07-02	1947-09-23
1948	1948-05-18	1948-09-18
1949	1949-04-29	1949-10-05
1950	1950-06-06	1950-09-07
1951	1951-05-28	1951-08-24
1952	1952-04-28	1952-09-27
1953	1953-06-12	1953-10-11
1954	1954-05-20	1954-09-26
1955	1955-05-01	1955-10-10
1956	1956-05-21	1956-10-12
1957	1957-07-01	1957-10-02
1960	1960-05-12	1960-09-20
1961	1961-06-05	1961-09-16
1962	1962-04-24	1962-09-07
1963	1963-06-19	1963-10-04
1964	1964-05-21	1964-09-18
1965	1965-07-08	1965-08-17
1966	1966-05-05	1966-09-21
1967	1967-05-23	1967-09-30
1968	1968-05-01	1968-09-15
1969	1969-05-27	1969-09-14
1970	1970-05-18	1970-10-06
1971	1971-07-02	1971-09-12
1975	1975-06-25	1975-08-29
1976	1976-06-03	1976-09-12
1977	1977-05-10	1977-08-26
1978	1978-06-29	1978-09-11
1979	1979-05-17	1979-08-19
1980	1980-04-21	1980-10-01
1981	1981-06-27	1981-09-13
1982	1982-07-04	1982-09-11
1983	1983-05-28	1983-09-27
1984	1984-05-31	1984-09-19
1985	1985-05-04	1985-08-22
1986	1986-05-05	1986-08-31
1987	1987-04-19	1987-09-15
1988	1988-05-27	1988-08-31
1989	1989-04-23	1989-10-01
1990	1990-06-11	1990-09-26
1991	1991-06-12	1991-10-17
1992	1992-05-07	1992-10-02
1993	1993-06-21	1993-09-12
1994	1994-05-23	1994-09-10
1995	1995-06-14	1995-09-16
1996	1996-06-09	1996-09-10
1997	1997-06-01	1997-10-03
1998	1998-05-18	1998-09-19
1999	1999-05-29	1999-09-23
2000	2000-06-08	2000-09-29
2001	2001-04-28	2001-10-02
2002	2002-05-29	2002-09-18
2004	2004-06-05	2004-09-19
2005	2005-06-23	2005-10-02
2006	2006-05-19	2006-09-14
2007	2007-05-19	2007-09-23
2008	2008-05-19	2008-09-20
2009	2009-06-26	2009-09-20
2010	2010-06-26	2010-09-27
2011	2011-06-03	2011-10-05
2012	2012-04-24	2012-09-16
2013	2013-05-14	2013-09-18
2014	2014-05-24	2014-09-27
2015	2015-06-28	2015-09-27
2016	2016-06-09	2016-09-03
2017	2017-06-02	2017-09-13
2018	2018-05-25	2018-09-09
2019	2019-06-07	2019-09-17
2020	2020-06-13	2020-09-25
2021	2021-06-04	2021-10-07
2022	2022-06-19	2022-09-30
2023	2023-05-24	2023-09-19
2024	2024-05-18	2024-10-10
2025	2025-05-11	2025-10-04
2026	2026-05-25	2026-10-06

Every Fixed Threshold

Fixed thresholds at Bowman
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	97	69	2021	60
35 C (95 F): Days	93	23	1988	24
40 C (104 F): Days	14	3	1931	8
90 F (32.2 C): Days	97	51	2021	42
100 F (37.8 C): Days	65	9	2021	15
0 C (32 F): Ice days (max	97	107	1978	30
0 C (32 F): Frost days (min	87	212	2002	105
-10 C (14 F): Days with min	87	109	1978	27
-20 C (-4 F): Days with min	87	57	1916	8
-30 C (-22 F): Days with min	68	18	1916	2
-40 C (-40 F): Days with min	1	1	1916	1
20 C (68 F): Tropical nights (min	40	6	2007	3
25 C (77 F): Days with min	1	2	1921	2
10 mm (0.39 in): Days with 10 mm or more rain	102	23	2013	8
25 mm (0.98 in): Days with 25 mm or more rain	81	7	1941	3
50 mm (1.97 in): Days with 50 mm or more rain	25	4	2013	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1966	1
10 cm (3.9 in): Days with 10 cm or more snowfall	68	8	2022	1
25 cm (9.8 in): Days with 25 cm or more snowfall	12	2	2009	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Bowman 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).

Bowman Threshold Days by Year (USC00320995)

Key Facts for Bowman Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related