Bomnak Threshold Days by Year (RSM00031253)

14 fixed thresholds counted per year at Bomnak (RSM00031253): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bomnak Thresholds

Bomnak: days with 10 mm (0.39 in) or more of precipitation in 96 years, most in 1982 with 30.
Bomnak: nights with a minimum temperature at or below 0 C (32 F) in 95 years, most in 1954 with 241.
Bomnak: nights with a minimum temperature at or below -10 C (14 F) in 95 years, most in 1915 with 184.
Bomnak: nights with a minimum temperature at or below -20 C (-4 F) in 95 years, most in 1952 with 149.
14 fixed thresholds have at least one qualifying day at Bomnak.

Days at or above 30 C (86 F)

81 years with a qualifying day

Days per year at Bomnak with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 2011.

Days at or above 30 C (86 F) per year at Bomnak
Year	Days	Decade average
1914	5	3.3
1915	1	3.3
1916	4	3.3
1928	4	4
1930	9	7.9
1931	13	7.9
1932	7	7.9
1933	7	7.9
1934	10	7.9
1936	2	7.9
1937	7	7.9
1940	7	5.8
1941	6	5.8
1942	5	5.8
1943	2	5.8
1944	7	5.8
1945	3	5.8
1948	4	5.8
1949	12	5.8
1950	7	5.4
1951	7	5.4
1952	9	5.4
1953	2	5.4
1954	16	5.4
1955	4	5.4
1956	2	5.4
1957	1	5.4
1958	3	5.4
1959	3	5.4
1960	8	7.5
1962	13	7.5
1963	14	7.5
1964	2	7.5
1966	3	7.5
1967	5	7.5
1968	14	7.5
1969	1	7.5
1970	13	5
1971	5	5
1972	2	5
1973	5	5
1974	2	5
1975	8	5
1976	5	5
1977	6	5
1978	1	5
1979	3	5
1980	17	4.1
1981	3	4.1
1982	5	4.1
1983	1	4.1
1984	1	4.1
1985	2	4.1
1986	3	4.1
1987	2	4.1
1988	5	4.1
1989	2	4.1
1991	3	5
1992	6	5
1993	2	5
1997	2	5
1998	8	5
1999	9	5
2000	6	6
2002	2	6
2003	3	6
2004	9	6
2005	8	6
2006	1	6
2007	6	6
2008	13	6
2010	1	5.5
2011	19	5.5
2012	1	5.5
2013	3	5.5
2014	2	5.5
2015	5	5.5
2017	12	5.5
2018	1	5.5
2023	12	9.5
2025	7	9.5

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

First to last qualifying date each year at Bomnak
Year	First date	Last date
1914	1914-07-08	1914-07-26
1915	1915-07-23	1915-07-23
1916	1916-07-03	1916-07-25
1928	1928-06-24	1928-07-04
1930	1930-06-15	1930-08-07
1931	1931-07-10	1931-08-04
1932	1932-06-21	1932-07-16
1933	1933-06-22	1933-07-26
1934	1934-06-22	1934-08-09
1936	1936-06-20	1936-06-21
1937	1937-06-16	1937-08-08
1940	1940-06-25	1940-07-26
1941	1941-06-11	1941-08-10
1942	1942-07-10	1942-07-14
1943	1943-07-16	1943-07-18
1944	1944-06-13	1944-07-21
1945	1945-06-30	1945-07-22
1948	1948-07-03	1948-07-16
1949	1949-06-09	1949-08-01
1950	1950-06-02	1950-08-02
1951	1951-06-17	1951-07-24
1952	1952-06-08	1952-08-03
1953	1953-06-28	1953-06-29
1954	1954-06-26	1954-07-24
1955	1955-06-19	1955-08-21
1956	1956-07-21	1956-07-22
1957	1957-07-07	1957-07-07
1958	1958-05-19	1958-08-05
1959	1959-06-10	1959-08-14
1960	1960-06-28	1960-07-30
1962	1962-06-22	1962-08-08
1963	1963-07-10	1963-07-26
1964	1964-07-28	1964-07-29
1966	1966-07-03	1966-07-05
1967	1967-06-17	1967-07-31
1968	1968-05-27	1968-08-16
1969	1969-06-19	1969-06-19
1970	1970-06-17	1970-08-06
1971	1971-06-01	1971-07-25
1972	1972-07-30	1972-07-31
1973	1973-06-06	1973-07-03
1974	1974-07-08	1974-07-17
1975	1975-05-26	1975-07-12
1976	1976-07-11	1976-07-19
1977	1977-06-17	1977-07-16
1978	1978-06-30	1978-06-30
1979	1979-05-26	1979-07-04
1980	1980-06-20	1980-08-06
1981	1981-05-20	1981-07-21
1982	1982-06-27	1982-07-01
1983	1983-07-22	1983-07-22
1984	1984-07-06	1984-07-06
1985	1985-07-02	1985-07-03
1986	1986-07-05	1986-07-27
1987	1987-06-19	1987-06-20
1988	1988-06-28	1988-07-22
1989	1989-07-04	1989-07-12
1991	1991-07-02	1991-07-18
1992	1992-05-29	1992-07-13
1993	1993-07-31	1993-08-01
1997	1997-07-17	1997-08-13
1998	1998-07-07	1998-08-21
1999	1999-06-22	1999-07-15
2000	2000-06-11	2000-08-13
2002	2002-07-06	2002-07-14
2003	2003-06-11	2003-07-20
2004	2004-07-06	2004-07-14
2005	2005-07-12	2005-08-02
2006	2006-06-24	2006-06-24
2007	2007-07-02	2007-08-08
2008	2008-06-14	2008-07-25
2010	2010-08-28	2010-08-28
2011	2011-06-26	2011-08-28
2012	2012-06-22	2012-06-22
2013	2013-06-24	2013-07-03
2014	2014-06-21	2014-06-23
2015	2015-07-09	2015-08-11
2017	2017-06-13	2017-08-14
2018	2018-07-27	2018-07-27
2023	2023-06-27	2023-07-19
2025	2025-06-26	2025-07-16

Every Fixed Threshold

Fixed thresholds at Bomnak
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	81	19	2011	7
35 C (95 F): Days	5	4	2017	4
90 F (32.2 C): Days	43	7	1970	3
0 C (32 F): Ice days (max	91	180	1952	77
0 C (32 F): Frost days (min	95	241	1954	79
-10 C (14 F): Days with min	95	184	1915	58
-20 C (-4 F): Days with min	95	149	1952	50
-30 C (-22 F): Days with min	95	107	1966	20
-40 C (-40 F): Days with min	93	62	1969	7
20 C (68 F): Tropical nights (min	10	7	2011	2
10 mm (0.39 in): Days with 10 mm or more rain	96	30	1982	11
25 mm (0.98 in): Days with 25 mm or more rain	95	11	1953	2
50 mm (1.97 in): Days with 50 mm or more rain	31	3	1928	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

Data for Bomnak 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).

Bomnak Threshold Days by Year (RSM00031253)

Key Facts for Bomnak Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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