Santa Rosa Threshold Days by Year (MXN00026094)

12 fixed thresholds counted per year at Santa Rosa (MXN00026094): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Santa Rosa Thresholds

Santa Rosa: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1968 with 35.
Santa Rosa: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1984 with 15.
Santa Rosa: nights with a minimum temperature at or above 20 C (68 F) in 30 years, most in 1958 with 142.
Santa Rosa: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1969 with 256.
12 fixed thresholds have at least one qualifying day at Santa Rosa.

Days at or above 30 C (86 F)

29 years with a qualifying day

Days per year at Santa Rosa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 256 in 1969.

Days at or above 30 C (86 F) per year at Santa Rosa
Year	Days	Decade average
1957	116	98.7
1958	45	98.7
1959	135	98.7
1960	125	168.3
1961	124	168.3
1964	126	168.3
1965	154	168.3
1966	116	168.3
1967	216	168.3
1968	229	168.3
1969	256	168.3
1970	256	96
1972	243	96
1973	148	96
1974	39	96
1975	28	96
1976	64	96
1977	27	96
1978	22	96
1979	37	96
1980	42	22.2
1981	20	22.2
1982	22	22.2
1983	9	22.2
1984	9	22.2
1985	18	22.2
1986	16	22.2
1987	38	22.2
1988	26	22.2

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

First to last qualifying date each year at Santa Rosa
Year	First date	Last date
1957	1957-01-11	1957-09-18
1958	1958-05-18	1958-09-05
1959	1959-02-17	1959-11-08
1960	1960-03-04	1960-12-28
1961	1961-02-12	1961-10-03
1964	1964-01-27	1964-10-20
1965	1965-01-19	1965-12-29
1966	1966-03-23	1966-12-19
1967	1967-01-15	1967-11-19
1968	1968-02-02	1968-12-24
1969	1969-01-09	1969-12-26
1970	1970-01-16	1970-12-30
1972	1972-01-01	1972-11-18
1973	1973-05-23	1973-10-23
1974	1974-01-21	1974-10-09
1975	1975-06-01	1975-07-16
1976	1976-03-13	1976-08-13
1977	1977-06-01	1977-08-04
1978	1978-05-14	1978-07-23
1979	1979-06-10	1979-08-31
1980	1980-06-06	1980-07-29
1981	1981-06-06	1981-07-03
1982	1982-05-31	1982-08-27
1983	1983-05-27	1983-07-07
1984	1984-05-09	1984-06-15
1985	1985-05-28	1985-07-07
1986	1986-05-20	1986-06-29
1987	1987-06-13	1987-08-08
1988	1988-05-11	1988-06-30

Every Fixed Threshold

Fixed thresholds at Santa Rosa
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	29	256	1969	26
35 C (95 F): Days	14	100	1969	1
40 C (104 F): Days	3	15	1968	2
90 F (32.2 C): Days	25	170	1969	2
100 F (37.8 C): Days	10	41	1968	1
0 C (32 F): Frost days (min	23	36	1970	4
20 C (68 F): Tropical nights (min	30	142	1958	2
25 C (77 F): Days with min	7	47	1958	2
10 mm (0.39 in): Days with 10 mm or more rain	32	35	1968	29
25 mm (0.98 in): Days with 25 mm or more rain	32	15	1984	8
50 mm (1.97 in): Days with 50 mm or more rain	27	5	1957	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1973	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

Data for Santa Rosa 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).

Santa Rosa Threshold Days by Year (MXN00026094)

Key Facts for Santa Rosa Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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