Cerro Threshold Days by Year (USC00291630)

14 fixed thresholds counted per year at Cerro (USC00291630): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cerro Thresholds

Cerro: days with 10 mm (0.39 in) or more of precipitation in 83 years, most in 1923 with 21.
Cerro: days with 10 cm (3.9 in) or more of snowfall in 81 years, most in 1949 with 15.
Cerro: nights with a minimum temperature at or below 0 C (32 F) in 74 years, most in 2020 with 229.
Cerro: nights with a minimum temperature at or below -10 C (14 F) in 74 years, most in 1992 with 115.
14 fixed thresholds have at least one qualifying day at Cerro.

Days at or above 30 C (86 F)

67 years with a qualifying day

Days per year at Cerro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 56 in 2020.

Days at or above 30 C (86 F) per year at Cerro
Year	Days	Decade average
1911	7	9.4
1912	10	9.4
1913	18	9.4
1914	11	9.4
1919	1	9.4
1920	2	3
1923	4	3
1933	39	17.7
1934	23	17.7
1935	3	17.7
1936	12	17.7
1937	23	17.7
1938	1	17.7
1939	23	17.7
1940	22	13.1
1942	8	13.1
1943	22	13.1
1944	16	13.1
1945	9	13.1
1946	16	13.1
1947	12	13.1
1948	12	13.1
1949	1	13.1
1950	4	21.7
1951	32	21.7
1952	5	21.7
1953	32	21.7
1954	35	21.7
1955	20	21.7
1956	34	21.7
1957	9	21.7
1958	30	21.7
1959	16	21.7
1960	40	18.9
1961	15	18.9
1962	20	18.9
1963	33	18.9
1964	25	18.9
1965	8	18.9
1966	14	18.9
1967	6	18.9
1968	11	18.9
1969	17	18.9
1970	21	13.8
1971	11	13.8
1972	10	13.8
1973	10	13.8
1976	17	13.8
1992	2	9.3
1993	7	9.3
1995	17	9.3
1996	20	9.3
1997	6	9.3
1998	9	9.3
1999	4	9.3
2000	50	26.2
2001	9	26.2
2003	27	26.2
2007	21	26.2
2009	24	26.2
2015	7	25
2016	27	25
2017	16	25
2018	49	25
2019	26	25
2020	56	54.5
2021	53	54.5

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

First to last qualifying date each year at Cerro
Year	First date	Last date
1911	1911-06-14	1911-08-19
1912	1912-07-09	1912-08-27
1913	1913-07-01	1913-08-11
1914	1914-06-19	1914-08-20
1919	1919-08-24	1919-08-24
1920	1920-07-08	1920-07-14
1923	1923-07-02	1923-07-31
1933	1933-05-22	1933-10-12
1934	1934-07-01	1934-08-29
1935	1935-07-12	1935-07-27
1936	1936-06-19	1936-07-28
1937	1937-06-20	1937-08-24
1938	1938-07-10	1938-07-10
1939	1939-06-11	1939-09-02
1940	1940-06-02	1940-08-17
1942	1942-07-06	1942-07-20
1943	1943-06-21	1943-09-07
1944	1944-06-18	1944-09-08
1945	1945-08-04	1945-09-06
1946	1946-06-04	1946-08-06
1947	1947-07-12	1947-09-03
1948	1948-07-09	1948-09-04
1949	1949-08-22	1949-08-22
1950	1950-06-16	1950-08-09
1951	1951-06-17	1951-09-03
1952	1952-07-02	1952-08-16
1953	1953-06-11	1953-09-01
1954	1954-06-18	1954-10-01
1955	1955-06-08	1955-09-12
1956	1956-05-30	1956-09-19
1957	1957-06-27	1957-08-01
1958	1958-06-23	1958-09-02
1959	1959-06-11	1959-09-08
1960	1960-06-17	1960-09-05
1961	1961-06-21	1961-08-21
1962	1962-06-20	1962-08-29
1963	1963-06-14	1963-08-19
1964	1964-06-25	1964-08-10
1965	1965-07-18	1965-08-12
1966	1966-06-25	1966-07-28
1967	1967-07-01	1967-07-10
1968	1968-06-20	1968-07-23
1969	1969-06-29	1969-08-12
1970	1970-06-18	1970-08-14
1971	1971-06-23	1971-07-17
1972	1972-06-28	1972-08-12
1973	1973-06-26	1973-08-18
1976	1976-06-20	1976-07-30
1992	1992-07-05	1992-07-06
1993	1993-06-30	1993-07-27
1995	1995-07-09	1995-09-05
1996	1996-06-05	1996-08-15
1997	1997-06-30	1997-07-16
1998	1998-06-26	1998-07-20
1999	1999-06-28	1999-07-02
2000	2000-05-23	2000-09-17
2001	2001-06-18	2001-07-28
2003	2003-07-01	2003-08-10
2007	2007-06-20	2007-08-24
2009	2009-07-09	2009-09-01
2015	2015-06-20	2015-06-30
2016	2016-06-17	2016-08-02
2017	2017-06-16	2017-09-03
2018	2018-06-03	2018-09-18
2019	2019-07-09	2019-09-07
2020	2020-05-18	2020-09-07
2021	2021-06-09	2021-09-18

Every Fixed Threshold

Fixed thresholds at Cerro
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	67	56	2020	53
35 C (95 F): Days	10	6	1937	1
90 F (32.2 C): Days	45	22	2018	18
0 C (32 F): Ice days (max	69	59	1939	12
0 C (32 F): Frost days (min	74	229	2020	185
-10 C (14 F): Days with min	74	115	1992	56
-20 C (-4 F): Days with min	73	44	1992	4
-30 C (-22 F): Days with min	21	5	1919	1
10 mm (0.39 in): Days with 10 mm or more rain	83	21	1923	6
25 mm (0.98 in): Days with 25 mm or more rain	42	5	1942	1
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1934	1
10 cm (3.9 in): Days with 10 cm or more snowfall	81	15	1949	4
25 cm (9.8 in): Days with 25 cm or more snowfall	27	3	1944	1
50 cm (19.7 in): Days with 50 cm or more snowfall	3	1	1913	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1911.

Download the Data

Data for Cerro 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).

Cerro Threshold Days by Year (USC00291630)

Key Facts for Cerro Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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