Hilok Threshold Days by Year (RSM00030844)

13 fixed thresholds counted per year at Hilok (RSM00030844): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hilok Thresholds

Hilok: days with a maximum temperature at or below 0 C (32 F) in 83 years, most in 1976 with 161.
Hilok: days with 10 mm (0.39 in) or more of precipitation in 83 years, most in 1970 with 18.
Hilok: nights with a minimum temperature at or below 0 C (32 F) in 81 years, most in 1969 with 264.
Hilok: nights with a minimum temperature at or below -10 C (14 F) in 81 years, most in 1976 with 182.
13 fixed thresholds have at least one qualifying day at Hilok.

Days at or above 30 C (86 F)

80 years with a qualifying day

Days per year at Hilok with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 1946.

Days at or above 30 C (86 F) per year at Hilok
Year	Days	Decade average
1936	14	10
1937	6	10
1938	6	10
1939	14	10
1940	1	9.9
1941	5	9.9
1942	2	9.9
1943	14	9.9
1944	15	9.9
1945	5	9.9
1946	29	9.9
1947	7	9.9
1948	8	9.9
1949	13	9.9
1950	25	9
1951	7	9
1952	5	9
1953	6	9
1955	8	9
1957	4	9
1958	8	9
1960	6	5.3
1961	4	5.3
1962	1	5.3
1963	3	5.3
1964	8	5.3
1966	2	5.3
1967	4	5.3
1968	13	5.3
1969	7	5.3
1970	8	9.3
1971	2	9.3
1973	7	9.3
1974	13	9.3
1975	6	9.3
1976	7	9.3
1977	16	9.3
1978	8	9.3
1979	17	9.3
1980	10	5.1
1981	7	5.1
1982	3	5.1
1983	1	5.1
1984	6	5.1
1985	3	5.1
1986	9	5.1
1987	5	5.1
1988	1	5.1
1989	6	5.1
1990	6	8.4
1991	12	8.4
1992	9	8.4
1993	8	8.4
1994	7	8.4
1995	4	8.4
1997	11	8.4
1998	6	8.4
1999	13	8.4
2000	13	13.1
2001	15	13.1
2002	15	13.1
2003	6	13.1
2004	22	13.1
2005	11	13.1
2006	11	13.1
2007	24	13.1
2008	11	13.1
2009	3	13.1
2010	22	13
2011	19	13
2012	3	13
2013	2	13
2014	10	13
2015	29	13
2016	13	13
2017	18	13
2018	6	13
2019	8	13
2020	8	11
2025	14	11

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

First to last qualifying date each year at Hilok
Year	First date	Last date
1936	1936-06-19	1936-08-05
1937	1937-06-18	1937-08-29
1938	1938-06-07	1938-07-26
1939	1939-07-06	1939-07-28
1940	1940-06-18	1940-06-18
1941	1941-06-08	1941-08-07
1942	1942-06-18	1942-08-02
1943	1943-06-30	1943-08-08
1944	1944-06-16	1944-08-22
1945	1945-06-26	1945-08-06
1946	1946-05-25	1946-08-11
1947	1947-06-26	1947-09-10
1948	1948-06-19	1948-08-22
1949	1949-07-04	1949-08-09
1950	1950-05-31	1950-08-04
1951	1951-06-15	1951-07-15
1952	1952-07-09	1952-08-03
1953	1953-06-13	1953-08-05
1955	1955-07-12	1955-08-22
1957	1957-06-10	1957-08-02
1958	1958-06-04	1958-08-12
1960	1960-06-27	1960-08-13
1961	1961-06-08	1961-07-09
1962	1962-07-11	1962-07-11
1963	1963-08-08	1963-08-23
1964	1964-06-14	1964-08-02
1966	1966-07-02	1966-08-24
1967	1967-07-11	1967-08-05
1968	1968-05-31	1968-08-14
1969	1969-06-17	1969-07-19
1970	1970-06-12	1970-07-25
1971	1971-06-21	1971-07-13
1973	1973-06-04	1973-06-28
1974	1974-05-26	1974-08-29
1975	1975-05-24	1975-08-18
1976	1976-06-24	1976-07-18
1977	1977-06-23	1977-08-27
1978	1978-06-16	1978-08-14
1979	1979-05-25	1979-07-06
1980	1980-06-20	1980-08-18
1981	1981-05-20	1981-07-09
1982	1982-06-09	1982-07-29
1983	1983-07-05	1983-07-05
1984	1984-06-20	1984-07-24
1985	1985-05-22	1985-06-04
1986	1986-06-04	1986-08-21
1987	1987-06-08	1987-08-13
1988	1988-08-03	1988-08-03
1989	1989-06-18	1989-08-04
1990	1990-05-16	1990-07-21
1991	1991-05-18	1991-08-04
1992	1992-05-23	1992-07-29
1993	1993-05-26	1993-08-02
1994	1994-06-09	1994-07-16
1995	1995-06-09	1995-07-20
1997	1997-06-11	1997-07-14
1998	1998-07-02	1998-07-14
1999	1999-05-25	1999-07-25
2000	2000-05-06	2000-06-26
2001	2001-05-12	2001-08-10
2002	2002-06-27	2002-08-18
2003	2003-07-13	2003-07-23
2004	2004-05-22	2004-07-20
2005	2005-06-02	2005-08-23
2006	2006-06-17	2006-08-10
2007	2007-05-29	2007-09-07
2008	2008-06-07	2008-08-18
2009	2009-07-24	2009-08-12
2010	2010-06-01	2010-09-12
2011	2011-06-15	2011-08-27
2012	2012-06-18	2012-08-04
2013	2013-05-05	2013-06-21
2014	2014-05-30	2014-09-04
2015	2015-05-23	2015-08-16
2016	2016-06-02	2016-08-02
2017	2017-05-16	2017-08-03
2018	2018-05-30	2018-08-24
2019	2019-05-22	2019-07-15
2020	2020-06-16	2020-07-23
2025	2025-05-26	2025-08-10

Every Fixed Threshold

Fixed thresholds at Hilok
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	80	29	1946	14
35 C (95 F): Days	22	4	1939	3
90 F (32.2 C): Days	66	12	2007	5
100 F (37.8 C): Days	3	1	1977	1
0 C (32 F): Ice days (max	83	161	1976	63
0 C (32 F): Frost days (min	81	264	1969	89
-10 C (14 F): Days with min	81	182	1976	54
-20 C (-4 F): Days with min	81	141	1976	41
-30 C (-22 F): Days with min	81	83	1957	24
-40 C (-40 F): Days with min	75	37	1969	5
10 mm (0.39 in): Days with 10 mm or more rain	83	18	1970	4
25 mm (0.98 in): Days with 25 mm or more rain	61	6	1990	1
50 mm (1.97 in): Days with 50 mm or more rain	9	1	1940	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.

Download the Data

Data for Hilok 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).

Hilok Threshold Days by Year (RSM00030844)

Key Facts for Hilok Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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