Gilroy Threshold Days by Year (USC00043417)

13 fixed thresholds counted per year at Gilroy (USC00043417): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Gilroy Thresholds

Gilroy: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 1983 with 36.
Gilroy: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1982 with 13.
Gilroy: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1997 with 116.
Gilroy: days with a maximum temperature at or above 35 C (95 F) in 51 years, most in 1996 with 46.
13 fixed thresholds have at least one qualifying day at Gilroy.

Days at or above 30 C (86 F)

51 years with a qualifying day

Days per year at Gilroy with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 116 in 1997.

Days at or above 30 C (86 F) per year at Gilroy
Year	Days	Decade average
1958	93	90.5
1959	88	90.5
1960	85	76.6
1961	88	76.6
1962	61	76.6
1963	63	76.6
1964	83	76.6
1965	72	76.6
1966	80	76.6
1967	92	76.6
1968	68	76.6
1969	74	76.6
1970	66	81.1
1971	65	81.1
1972	75	81.1
1973	78	81.1
1974	85	81.1
1975	66	81.1
1976	82	81.1
1977	87	81.1
1978	102	81.1
1979	105	81.1
1980	64	76
1982	72	76
1983	81	76
1984	92	76
1985	68	76
1988	82	76
1989	73	76
1990	102	84.1
1991	67	84.1
1992	90	84.1
1993	76	84.1
1994	70	84.1
1995	79	84.1
1996	100	84.1
1997	116	84.1
1999	57	84.1
2001	68	72.7
2002	65	72.7
2003	84	72.7
2004	84	72.7
2005	69	72.7
2006	75	72.7
2007	64	72.7
2012	76	77
2013	65	77
2014	90	77
2020	99	96
2021	88	96
2022	101	96

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

First to last qualifying date each year at Gilroy
Year	First date	Last date
1958	1958-05-05	1958-10-30
1959	1959-04-02	1959-10-25
1960	1960-03-20	1960-10-23
1961	1961-04-04	1961-10-18
1962	1962-04-07	1962-11-02
1963	1963-05-17	1963-10-08
1964	1964-04-14	1964-10-23
1965	1965-04-26	1965-10-31
1966	1966-04-01	1966-11-02
1967	1967-05-08	1967-11-03
1968	1968-03-30	1968-10-27
1969	1969-05-06	1969-10-01
1970	1970-05-02	1970-10-03
1971	1971-04-05	1971-10-14
1972	1972-03-17	1972-10-07
1973	1973-04-26	1973-10-18
1974	1974-05-25	1974-10-19
1975	1975-05-13	1975-10-06
1976	1976-05-01	1976-11-07
1977	1977-04-07	1977-10-15
1978	1978-03-18	1978-11-09
1979	1979-05-12	1979-10-11
1980	1980-04-13	1980-11-05
1982	1982-04-22	1982-10-15
1983	1983-05-18	1983-10-28
1984	1984-04-15	1984-10-08
1985	1985-04-02	1985-10-06
1988	1988-04-10	1988-10-21
1989	1989-04-06	1989-10-20
1990	1990-04-04	1990-11-13
1991	1991-02-26	1991-10-21
1992	1992-04-20	1992-10-24
1993	1993-04-29	1993-10-30
1994	1994-04-16	1994-10-23
1995	1995-04-25	1995-10-28
1996	1996-04-07	1996-10-09
1997	1997-03-20	1997-11-05
1999	1999-04-16	1999-10-31
2001	2001-04-25	2001-11-09
2002	2002-04-14	2002-10-13
2003	2003-03-31	2003-10-27
2004	2004-03-17	2004-10-15
2005	2005-03-12	2005-11-19
2006	2006-05-01	2006-10-24
2007	2007-03-17	2007-10-25
2012	2012-04-22	2012-11-07
2013	2013-03-14	2013-10-21
2014	2014-04-08	2014-10-18
2020	2020-04-24	2020-11-05
2021	2021-03-31	2021-10-17
2022	2022-04-06	2022-10-06

Every Fixed Threshold

Fixed thresholds at Gilroy
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	51	116	1997	101
35 C (95 F): Days	51	46	1996	31
40 C (104 F): Days	37	8	1961	4
45 C (113 F): Days	2	1	1972	1
90 F (32.2 C): Days	51	81	1996	74
100 F (37.8 C): Days	49	20	1996	10
110 F (43.3 C): Days	8	3	1961	3
0 C (32 F): Frost days (min	48	57	1964	14
20 C (68 F): Tropical nights (min	9	3	2006	3
10 mm (0.39 in): Days with 10 mm or more rain	56	36	1983	10
25 mm (0.98 in): Days with 25 mm or more rain	54	13	1982	4
50 mm (1.97 in): Days with 50 mm or more rain	33	3	1995	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1909	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

Data for Gilroy 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).

Gilroy Threshold Days by Year (USC00043417)

Key Facts for Gilroy Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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