Modesto AP Threshold Days by Year (USW00023258)

14 fixed thresholds counted per year at Modesto AP (USW00023258): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Modesto AP Thresholds

Modesto AP: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1983 with 24.
Modesto AP: days with a maximum temperature at or above 30 C (86 F) in 99 years, most in 2020 with 144.
Modesto AP: days with a maximum temperature at or above 35 C (95 F) in 99 years, most in 2017 with 83.
Modesto AP: days with a maximum temperature at or above 90 F (32.2 C) in 99 years, most in 2020 with 115.
14 fixed thresholds have at least one qualifying day at Modesto AP.

Days at or above 30 C (86 F)

99 years with a qualifying day

Days per year at Modesto AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 144 in 2020.

Days at or above 30 C (86 F) per year at Modesto AP
Year	Days	Decade average
1928	118	108
1929	98	108
1930	88	105.1
1931	110	105.1
1932	100	105.1
1933	93	105.1
1934	109	105.1
1935	100	105.1
1936	109	105.1
1937	110	105.1
1938	109	105.1
1939	123	105.1
1940	124	98.3
1941	79	98.3
1942	94	98.3
1943	96	98.3
1944	93	98.3
1945	108	98.3
1946	103	98.3
1947	121	98.3
1948	76	98.3
1949	89	98.3
1950	103	105.4
1951	106	105.4
1952	100	105.4
1953	87	105.4
1954	96	105.4
1955	98	105.4
1956	102	105.4
1957	105	105.4
1958	127	105.4
1959	130	105.4
1960	124	110.5
1961	113	110.5
1962	114	110.5
1963	101	110.5
1964	109	110.5
1965	103	110.5
1966	109	110.5
1967	120	110.5
1968	103	110.5
1969	109	110.5
1970	120	113.3
1971	108	113.3
1972	109	113.3
1973	108	113.3
1974	128	113.3
1975	106	113.3
1976	98	113.3
1977	111	113.3
1978	116	113.3
1979	129	113.3
1980	92	109
1981	128	109
1982	97	109
1983	100	109
1984	126	109
1985	117	109
1986	80	109
1987	119	109
1988	122	109
1989	109	109
1990	102	105.9
1991	118	105.9
1992	124	105.9
1993	106	105.9
1994	111	105.9
1995	68	105.9
1996	115	105.9
1997	128	105.9
1998	86	105.9
1999	101	105.9
2000	108	122.3
2001	129	122.3
2002	120	122.3
2003	121	122.3
2004	126	122.3
2005	102	122.3
2006	128	122.3
2007	129	122.3
2008	135	122.3
2009	125	122.3
2010	107	122.8
2011	105	122.8
2012	128	122.8
2013	123	122.8
2014	138	122.8
2015	134	122.8
2016	131	122.8
2017	126	122.8
2018	113	122.8
2019	123	122.8
2020	144	126
2021	122	126
2022	127	126
2023	99	126
2024	137	126
2025	127	126
2026	126	126

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

First to last qualifying date each year at Modesto AP
Year	First date	Last date
1928	1928-04-29	1928-10-19
1929	1929-05-02	1929-10-23
1930	1930-05-19	1930-10-07
1931	1931-04-06	1931-10-02
1932	1932-05-09	1932-10-05
1933	1933-04-14	1933-10-18
1934	1934-04-06	1934-10-12
1935	1935-04-26	1935-10-10
1936	1936-04-11	1936-10-15
1937	1937-05-02	1937-10-25
1938	1938-04-18	1938-10-25
1939	1939-04-07	1939-10-30
1940	1940-04-12	1940-10-19
1941	1941-05-09	1941-09-30
1942	1942-05-19	1942-10-08
1943	1943-05-09	1943-10-15
1944	1944-05-02	1944-10-03
1945	1945-04-18	1945-10-05
1946	1946-04-15	1946-10-13
1947	1947-04-13	1947-10-06
1948	1948-06-07	1948-10-09
1949	1949-04-11	1949-10-04
1950	1950-04-19	1950-10-14
1951	1951-04-09	1951-10-09
1952	1952-04-05	1952-10-05
1953	1953-05-04	1953-10-08
1954	1954-04-15	1954-10-15
1955	1955-05-10	1955-10-13
1956	1956-04-09	1956-10-01
1957	1957-04-05	1957-09-24
1958	1958-05-01	1958-10-17
1959	1959-04-01	1959-10-25
1960	1960-03-19	1960-10-22
1961	1961-04-02	1961-10-18
1962	1962-04-06	1962-10-01
1963	1963-05-16	1963-10-07
1964	1964-04-14	1964-10-22
1965	1965-04-25	1965-10-26
1966	1966-03-31	1966-10-25
1967	1967-05-07	1967-10-18
1968	1968-04-10	1968-09-28
1969	1969-04-21	1969-10-01
1970	1970-05-02	1970-10-11
1971	1971-04-05	1971-10-13
1972	1972-03-16	1972-10-07
1973	1973-04-25	1973-10-14
1974	1974-04-30	1974-10-18
1975	1975-05-12	1975-10-05
1976	1976-04-30	1976-10-14
1977	1977-04-06	1977-10-15
1978	1978-05-03	1978-10-14
1979	1979-05-11	1979-10-11
1980	1980-04-16	1980-10-09
1981	1981-04-23	1981-10-01
1982	1982-05-03	1982-10-14
1983	1983-05-17	1983-10-12
1984	1984-04-14	1984-10-07
1985	1985-04-02	1985-10-06
1986	1986-04-20	1986-10-09
1987	1987-04-13	1987-10-18
1988	1988-03-26	1988-10-21
1989	1989-04-05	1989-10-19
1990	1990-04-13	1990-10-27
1991	1991-05-23	1991-10-21
1992	1992-04-20	1992-10-12
1993	1993-04-29	1993-10-30
1994	1994-04-15	1994-10-10
1995	1995-04-24	1995-10-20
1996	1996-04-06	1996-10-09
1997	1997-03-25	1997-11-04
1998	1998-04-21	1998-10-06
1999	1999-04-16	1999-10-21
2000	2000-04-03	2000-10-06
2001	2001-04-25	2001-10-15
2002	2002-04-13	2002-10-09
2003	2003-05-13	2003-10-28
2004	2004-04-10	2004-10-14
2005	2005-05-14	2005-10-14
2006	2006-04-28	2006-09-29
2007	2007-03-16	2007-10-24
2008	2008-04-12	2008-10-26
2009	2009-04-19	2009-09-28
2010	2010-05-03	2010-10-15
2011	2011-05-04	2011-10-23
2012	2012-04-20	2012-10-18
2013	2013-04-21	2013-10-06
2014	2014-04-08	2014-10-13
2015	2015-03-15	2015-10-16
2016	2016-04-06	2016-10-10
2017	2017-04-30	2017-10-27
2018	2018-04-22	2018-10-02
2019	2019-04-19	2019-10-25
2020	2020-04-24	2020-10-21
2021	2021-04-18	2021-10-04
2022	2022-04-07	2022-10-21
2023	2023-04-26	2023-10-20
2024	2024-04-22	2024-10-15
2025	2025-03-25	2025-10-07
2026	2026-03-17	2026-10-09

Every Fixed Threshold

Fixed thresholds at Modesto AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	99	144	2020	126
35 C (95 F): Days	99	83	2017	56
40 C (104 F): Days	86	20	2024	5
45 C (113 F): Days	1	2	2006	2
90 F (32.2 C): Days	99	115	2020	97
100 F (37.8 C): Days	99	45	2024	16
110 F (43.3 C): Days	10	4	2006	2
0 C (32 F): Ice days (max	2	1	1928	1
0 C (32 F): Frost days (min	95	66	1929	1
20 C (68 F): Tropical nights (min	85	43	2024	21
25 C (77 F): Days with min	17	5	2020	1
10 mm (0.39 in): Days with 10 mm or more rain	104	24	1983	7
25 mm (0.98 in): Days with 25 mm or more rain	70	5	1998	1
50 mm (1.97 in): Days with 50 mm or more rain	7	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 1928.

Download the Data

Data for Modesto 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).

Modesto AP Threshold Days by Year (USW00023258)

Key Facts for Modesto AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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