Arellano Threshold Days by Year (MXN00001062)

10 fixed thresholds counted per year at Arellano (MXN00001062): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arellano Thresholds

Arellano: days with a maximum temperature at or above 30 C (86 F) in 38 years, most in 2012 with 194.
Arellano: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1992 with 39.
Arellano: days with a maximum temperature at or above 90 F (32.2 C) in 36 years, most in 2002 with 69.
Arellano: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 2009 with 11.
10 fixed thresholds have at least one qualifying day at Arellano.

Days at or above 30 C (86 F)

38 years with a qualifying day

Days per year at Arellano with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 194 in 2012.

Days at or above 30 C (86 F) per year at Arellano
Year	Days	Decade average
1950	62	82.6
1951	87	82.6
1952	65	82.6
1953	106	82.6
1954	93	82.6
1980	87	67.6
1981	56	67.6
1982	116	67.6
1983	79	67.6
1984	54	67.6
1985	52	67.6
1986	72	67.6
1987	53	67.6
1988	47	67.6
1989	60	67.6
1990	55	54.3
1991	88	54.3
1992	31	54.3
1993	28	54.3
1994	52	54.3
1995	74	54.3
1996	70	54.3
1997	43	54.3
1998	64	54.3
1999	38	54.3
2000	22	83.1
2001	47	83.1
2002	119	83.1
2003	138	83.1
2004	99	83.1
2005	130	83.1
2006	100	83.1
2007	55	83.1
2008	54	83.1
2009	67	83.1
2010	65	141.7
2011	166	141.7
2012	194	141.7

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

First to last qualifying date each year at Arellano
Year	First date	Last date
1950	1950-02-28	1950-09-30
1951	1951-03-06	1951-11-10
1952	1952-01-07	1952-09-11
1953	1953-03-04	1953-08-19
1954	1954-03-20	1954-10-05
1980	1980-03-08	1980-08-04
1981	1981-04-01	1981-10-04
1982	1982-03-10	1982-10-06
1983	1983-04-01	1983-11-02
1984	1984-03-14	1984-09-08
1985	1985-03-03	1985-10-10
1986	1986-03-27	1986-11-19
1987	1987-03-22	1987-11-07
1988	1988-02-03	1988-07-15
1989	1989-02-28	1989-10-03
1990	1990-03-13	1990-06-28
1991	1991-03-07	1991-08-03
1992	1992-03-20	1992-06-30
1993	1993-04-12	1993-06-19
1994	1994-03-20	1994-07-31
1995	1995-03-22	1995-06-28
1996	1996-04-25	1996-08-17
1997	1997-03-04	1997-09-28
1998	1998-04-03	1998-09-01
1999	1999-04-05	1999-06-12
2000	2000-04-21	2000-05-29
2001	2001-04-05	2001-08-30
2002	2002-03-18	2002-12-04
2003	2003-02-05	2003-11-25
2004	2004-03-02	2004-11-28
2005	2005-03-18	2005-11-15
2006	2006-01-29	2006-10-13
2007	2007-02-21	2007-10-25
2008	2008-02-24	2008-09-03
2009	2009-02-16	2009-10-26
2010	2010-03-22	2010-11-28
2011	2011-02-28	2011-12-16
2012	2012-01-04	2012-12-15

Every Fixed Threshold

Fixed thresholds at Arellano
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	38	194	2012	194
35 C (95 F): Days	22	58	2002	13
40 C (104 F): Days	2	19	2002	19
90 F (32.2 C): Days	36	69	2002	32
100 F (37.8 C): Days	5	32	2002	2
0 C (32 F): Frost days (min	32	51	1999	3
20 C (68 F): Tropical nights (min	4	25	2006	5
10 mm (0.39 in): Days with 10 mm or more rain	38	39	1992	15
25 mm (0.98 in): Days with 25 mm or more rain	34	11	2009	4
50 mm (1.97 in): Days with 50 mm or more rain	8	1	1953	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

Download the Data

Data for Arellano 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).

Arellano Threshold Days by Year (MXN00001062)

Key Facts for Arellano Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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