Jerome Threshold Days by Year

16 fixed thresholds counted per year at Jerome (USC00104670): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jerome Thresholds

Jerome: days with a maximum temperature at or above 30 C (86 F) in 100 years, most in 2003 with 96.
Jerome: days with a maximum temperature at or above 35 C (95 F) in 100 years, most in 2007 with 54.
Jerome: days with a maximum temperature at or above 90 F (32.2 C) in 100 years, most in 1940 with 76.
Jerome: days with a maximum temperature at or below 0 C (32 F) in 100 years, most in 1985 with 72.
16 fixed thresholds have at least one qualifying day at Jerome.

Days at or above 30 C (86 F)

100 years with a qualifying day

Days per year at Jerome with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 96 in 2003.

Days at or above 30 C (86 F) per year at Jerome
Year	Days	Decade average
1916	47	60
1918	53	60
1919	80	60
1920	61	63.2
1921	51	63.2
1922	53	63.2
1923	64	63.2
1924	84	63.2
1925	67	63.2
1926	74	63.2
1927	70	63.2
1929	45	63.2
1930	82	82
1931	86	82
1932	63	82
1933	84	82
1934	95	82
1935	76	82
1936	90	82
1938	86	82
1939	76	82
1940	91	73.8
1941	72	73.8
1942	77	73.8
1943	76	73.8
1944	62	73.8
1945	73	73.8
1946	72	73.8
1947	72	73.8
1948	69	73.8
1949	74	73.8
1951	55	73.8
1952	80	73.8
1953	71	73.8
1954	71	73.8
1955	68	73.8
1956	82	73.8
1957	78	73.8
1958	89	73.8
1959	70	73.8
1960	73	71.9
1961	81	71.9
1962	57	71.9
1963	69	71.9
1964	61	71.9
1965	49	71.9
1966	91	71.9
1967	91	71.9
1968	67	71.9
1969	80	71.9
1970	72	68.9
1971	64	68.9
1972	74	68.9
1973	78	68.9
1974	81	68.9
1975	61	68.9
1976	51	68.9
1977	71	68.9
1978	59	68.9
1979	78	68.9
1980	62	69
1981	78	69
1982	55	69
1983	57	69
1984	68	69
1985	66	69
1986	73	69
1987	81	69
1988	83	69
1989	67	69
1990	69	68.5
1991	73	68.5
1992	79	68.5
1993	42	68.5
1994	83	68.5
1995	60	68.5
1996	70	68.5
1997	70	68.5
1998	69	68.5
1999	70	68.5
2000	81	81.5
2001	89	81.5
2002	70	81.5
2003	96	81.5
2004	65	81.5
2005	70	81.5
2006	87	81.5
2007	90	81.5
2008	85	81.5
2009	82	81.5
2010	63	68.9
2011	69	68.9
2012	82	68.9
2013	85	68.9
2014	59	68.9
2015	64	68.9
2016	60	68.9
2023	42	50.3
2025	53	50.3
2026	56	50.3

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

First to last qualifying date each year at Jerome
Year	First date	Last date
1916	1916-05-06	1916-09-23
1918	1918-06-04	1918-09-22
1919	1919-05-18	1919-09-16
1920	1920-06-07	1920-10-01
1921	1921-06-11	1921-08-31
1922	1922-06-05	1922-09-26
1923	1923-05-24	1923-09-20
1924	1924-05-10	1924-09-29
1925	1925-05-28	1925-09-25
1926	1926-04-29	1926-09-10
1927	1927-04-26	1927-10-16
1929	1929-05-20	1929-10-01
1930	1930-04-05	1930-09-18
1931	1931-05-06	1931-09-28
1932	1932-05-12	1932-09-17
1933	1933-05-29	1933-10-11
1934	1934-04-21	1934-10-12
1935	1935-05-22	1935-10-02
1936	1936-04-16	1936-09-22
1938	1938-05-24	1938-09-28
1939	1939-04-28	1939-09-23
1940	1940-05-10	1940-09-11
1941	1941-05-10	1941-09-18
1942	1942-05-21	1942-10-10
1943	1943-05-27	1943-10-02
1944	1944-05-14	1944-09-13
1945	1945-06-18	1945-09-15
1946	1946-06-03	1946-09-29
1947	1947-05-02	1947-09-24
1948	1948-05-17	1948-09-02
1949	1949-05-13	1949-09-27
1951	1951-05-27	1951-10-09
1952	1952-05-28	1952-10-08
1953	1953-06-10	1953-10-09
1954	1954-05-08	1954-09-21
1955	1955-06-07	1955-09-13
1956	1956-05-18	1956-09-25
1957	1957-06-02	1957-09-30
1958	1958-05-05	1958-10-17
1959	1959-05-13	1959-09-12
1960	1960-05-10	1960-09-27
1961	1961-05-25	1961-09-15
1962	1962-04-19	1962-09-26
1963	1963-06-18	1963-10-03
1964	1964-05-16	1964-10-07
1965	1965-06-08	1965-10-08
1966	1966-05-02	1966-09-24
1967	1967-05-17	1967-09-29
1968	1968-05-28	1968-09-18
1969	1969-04-22	1969-09-28
1970	1970-06-02	1970-10-03
1971	1971-05-26	1971-09-11
1972	1972-05-14	1972-09-18
1973	1973-05-15	1973-10-14
1974	1974-05-26	1974-09-25
1975	1975-05-14	1975-10-02
1976	1976-05-28	1976-09-11
1977	1977-04-24	1977-09-12
1978	1978-05-15	1978-09-28
1979	1979-05-15	1979-10-08
1980	1980-04-21	1980-09-28
1981	1981-05-02	1981-09-18
1982	1982-06-11	1982-09-09
1983	1983-05-25	1983-09-14
1984	1984-05-13	1984-09-20
1985	1985-05-02	1985-08-31
1986	1986-05-20	1986-09-07
1987	1987-05-05	1987-10-03
1988	1988-05-12	1988-10-04
1989	1989-05-07	1989-09-30
1990	1990-06-10	1990-10-02
1991	1991-06-11	1991-10-12
1992	1992-04-27	1992-10-02
1993	1993-05-12	1993-10-05
1994	1994-04-19	1994-09-29
1995	1995-06-13	1995-09-17
1996	1996-06-03	1996-10-10
1997	1997-05-11	1997-10-02
1998	1998-07-01	1998-09-18
1999	1999-05-25	1999-09-24
2000	2000-04-28	2000-09-29
2001	2001-05-09	2001-10-02
2002	2002-05-20	2002-09-16
2003	2003-05-23	2003-10-22
2004	2004-05-05	2004-10-09
2005	2005-05-29	2005-09-09
2006	2006-05-15	2006-10-01
2007	2007-04-29	2007-09-15
2008	2008-05-17	2008-10-02
2009	2009-05-18	2009-09-29
2010	2010-06-24	2010-10-04
2011	2011-06-06	2011-10-04
2012	2012-04-23	2012-09-23
2013	2013-05-12	2013-09-17
2014	2014-05-28	2014-09-26
2015	2015-06-01	2015-10-11
2016	2016-04-22	2016-09-30
2023	2023-05-21	2023-09-17
2025	2025-05-10	2025-09-03
2026	2026-05-25	2026-08-31

Every Fixed Threshold

Fixed thresholds at Jerome
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	100	96	2003	56
35 C (95 F): Days	100	54	2007	15
40 C (104 F): Days	40	7	2003	2
90 F (32.2 C): Days	100	76	1940	42
100 F (37.8 C): Days	83	22	2003	2
110 F (43.3 C): Days	2	1	1940	1
0 C (32 F): Ice days (max	100	72	1985	11
0 C (32 F): Frost days (min	98	193	1984	55
-10 C (14 F): Days with min	98	86	1985	1
-20 C (-4 F): Days with min	57	20	1949	1
-30 C (-22 F): Days with min	5	2	1933	1
20 C (68 F): Tropical nights (min	54	8	2023	12
10 mm (0.39 in): Days with 10 mm or more rain	99	16	1995	3
25 mm (0.98 in): Days with 25 mm or more rain	24	2	1961	1
50 mm (1.97 in): Days with 50 mm or more rain	1	0	n/a	1
10 cm (3.9 in): Days with 10 cm or more snowfall	22	4	1916	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 Jerome 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Jerome Threshold Days by Year

Key Facts for Jerome Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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