Dimas Threshold Days by Year

12 fixed thresholds counted per year at Dimas (MXN00025021): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dimas Thresholds

Dimas: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 1974 with 258.
Dimas: days with a maximum temperature at or above 90 F (32.2 C) in 36 years, most in 1974 with 179.
Dimas: nights with a minimum temperature at or above 20 C (68 F) in 36 years, most in 2003 with 172.
Dimas: nights with a minimum temperature at or above 25 C (77 F) in 35 years, most in 1987 with 74.
12 fixed thresholds have at least one qualifying day at Dimas.

Days at or above 30 C (86 F)

36 years with a qualifying day

Days per year at Dimas with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 258 in 1974.

Days at or above 30 C (86 F) per year at Dimas
Year	Days	Decade average
1963	164	134.1
1964	113	134.1
1965	129	134.1
1966	143	134.1
1967	149	134.1
1968	126	134.1
1969	115	134.1
1970	160	194.1
1971	155	194.1
1972	218	194.1
1973	190	194.1
1974	258	194.1
1975	195	194.1
1976	200	194.1
1977	226	194.1
1978	178	194.1
1979	161	194.1
1980	195	216.5
1981	206	216.5
1982	232	216.5
1983	212	216.5
1984	200	216.5
1985	214	216.5
1986	226	216.5
1987	221	216.5
1988	237	216.5
1989	222	216.5
1997	185	173.7
1998	150	173.7
1999	186	173.7
2000	162	167.3
2001	150	167.3
2003	190	167.3
2010	167	192
2011	199	192
2012	210	192

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

First to last qualifying date each year at Dimas
Year	First date	Last date
1963	1963-04-21	1963-12-24
1964	1964-04-18	1964-10-31
1965	1965-04-21	1965-12-13
1966	1966-05-06	1966-11-30
1967	1967-05-09	1967-11-17
1968	1968-05-01	1968-12-16
1969	1969-03-21	1969-11-21
1970	1970-01-28	1970-12-21
1971	1971-03-22	1971-12-27
1972	1972-01-16	1972-12-20
1973	1973-01-30	1973-12-30
1974	1974-01-05	1974-12-22
1975	1975-01-24	1975-12-21
1976	1976-01-31	1976-12-27
1977	1977-01-05	1977-12-30
1978	1978-01-01	1978-12-08
1979	1979-01-17	1979-12-18
1980	1980-01-09	1980-12-26
1981	1981-01-07	1981-12-24
1982	1982-01-09	1982-12-22
1983	1983-01-12	1983-12-24
1984	1984-02-28	1984-12-11
1985	1985-01-05	1985-12-15
1986	1986-02-18	1986-12-16
1987	1987-01-02	1987-12-24
1988	1988-02-23	1988-12-30
1989	1989-01-02	1989-12-10
1997	1997-04-24	1997-11-19
1998	1998-01-27	1998-12-03
1999	1999-01-25	1999-11-29
2000	2000-01-15	2000-10-25
2001	2001-05-02	2001-11-30
2003	2003-01-01	2003-11-12
2010	2010-05-06	2010-11-22
2011	2011-04-04	2011-11-28
2012	2012-01-03	2012-11-29

Every Fixed Threshold

Fixed thresholds at Dimas
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	36	258	1974	210
35 C (95 F): Days	34	102	1974	1
90 F (32.2 C): Days	36	179	1974	76
100 F (37.8 C): Days	16	19	1984	15
0 C (32 F): Frost days (min	1	2	2011	2
20 C (68 F): Tropical nights (min	36	172	2003	164
25 C (77 F): Days with min	35	74	1987	37
10 mm (0.39 in): Days with 10 mm or more rain	34	28	1964	14
25 mm (0.98 in): Days with 25 mm or more rain	34	18	1964	7
50 mm (1.97 in): Days with 50 mm or more rain	31	9	1964	4
100 mm (3.94 in): Days with 100 mm or more rain	16	3	1972	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1972	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 Dimas 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Dimas Threshold Days by Year

Key Facts for Dimas Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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