Bernardo Threshold Days by Year (USC00290915)

18 fixed thresholds counted per year at Bernardo (USC00290915): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bernardo Thresholds

Bernardo: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 2000 with 11.
Bernardo: days with a maximum temperature at or above 30 C (86 F) in 39 years, most in 1989 with 156.
Bernardo: days with a maximum temperature at or above 35 C (95 F) in 39 years, most in 2000 with 100.
Bernardo: days with a maximum temperature at or above 90 F (32.2 C) in 39 years, most in 2000 with 137.
18 fixed thresholds have at least one qualifying day at Bernardo.

Days at or above 30 C (86 F)

39 years with a qualifying day

Days per year at Bernardo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 156 in 1989.

Days at or above 30 C (86 F) per year at Bernardo
Year	Days	Decade average
1963	114	105
1964	113	105
1965	93	105
1966	112	105
1967	100	105
1968	94	105
1969	109	105
1970	108	101.4
1971	106	101.4
1972	88	101.4
1973	95	101.4
1974	107	101.4
1975	87	101.4
1976	106	101.4
1977	108	101.4
1978	111	101.4
1979	98	101.4
1980	111	126.1
1981	131	126.1
1982	128	126.1
1983	124	126.1
1984	135	126.1
1985	116	126.1
1986	121	126.1
1987	123	126.1
1988	116	126.1
1989	156	126.1
1990	131	140.4
1991	135	140.4
1992	129	140.4
1993	140	140.4
1994	144	140.4
1995	135	140.4
1996	151	140.4
1997	139	140.4
1998	155	140.4
1999	145	140.4
2000	155	139
2003	123	139

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

First to last qualifying date each year at Bernardo
Year	First date	Last date
1963	1963-04-09	1963-10-13
1964	1964-05-14	1964-10-30
1965	1965-04-21	1965-10-14
1966	1966-04-03	1966-10-13
1967	1967-04-05	1967-10-03
1968	1968-05-21	1968-10-15
1969	1969-04-22	1969-10-10
1970	1970-05-11	1970-09-25
1971	1971-03-28	1971-09-17
1972	1972-04-07	1972-10-03
1973	1973-05-11	1973-10-03
1974	1974-03-31	1974-10-05
1975	1975-05-13	1975-09-19
1976	1976-05-12	1976-09-20
1977	1977-04-18	1977-10-06
1978	1978-05-11	1978-10-10
1979	1979-05-07	1979-10-12
1980	1980-04-18	1980-10-06
1981	1981-04-09	1981-10-01
1982	1982-04-30	1982-10-06
1983	1983-05-01	1983-09-26
1984	1984-04-17	1984-09-24
1985	1985-04-12	1985-09-17
1986	1986-04-22	1986-09-22
1987	1987-04-17	1987-10-11
1988	1988-04-08	1988-10-18
1989	1989-03-10	1989-10-14
1990	1990-04-14	1990-10-27
1991	1991-04-09	1991-10-19
1992	1992-04-11	1992-10-12
1993	1993-04-11	1993-10-07
1994	1994-04-17	1994-10-06
1995	1995-04-28	1995-10-19
1996	1996-04-09	1996-10-14
1997	1997-03-21	1997-10-07
1998	1998-04-23	1998-10-16
1999	1999-04-19	1999-10-15
2000	2000-04-17	2000-10-04
2003	2003-05-12	2003-10-02

Every Fixed Threshold

Fixed thresholds at Bernardo
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	39	156	1989	123
35 C (95 F): Days	39	100	2000	54
40 C (104 F): Days	22	18	1994	6
45 C (113 F): Days	1	1	1994	1
90 F (32.2 C): Days	39	137	2000	96
100 F (37.8 C): Days	36	50	1994	30
110 F (43.3 C): Days	4	6	1994	2
0 C (32 F): Ice days (max	20	10	1971	2
0 C (32 F): Frost days (min	33	179	1964	112
-10 C (14 F): Days with min	33	72	1964	15
-20 C (-4 F): Days with min	9	6	1964	2
20 C (68 F): Tropical nights (min	26	35	1986	10
25 C (77 F): Days with min	1	7	1986	7
10 mm (0.39 in): Days with 10 mm or more rain	45	11	2000	6
25 mm (0.98 in): Days with 25 mm or more rain	28	3	1980	3
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1977	1
100 mm (3.94 in): Days with 100 mm or more rain	1	0	n/a	1
10 cm (3.9 in): Days with 10 cm or more snowfall	8	2	1991	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1963.

Download the Data

Data for Bernardo 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).

Bernardo Threshold Days by Year (USC00290915)

Key Facts for Bernardo Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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