Arroyo Seco Threshold Days by Year (MXN00022036)

13 fixed thresholds counted per year at Arroyo Seco (MXN00022036): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arroyo Seco Thresholds

Arroyo Seco: days with a maximum temperature at or above 30 C (86 F) in 20 years, most in 2006 with 234.
Arroyo Seco: days with a maximum temperature at or above 35 C (95 F) in 20 years, most in 1980 with 99.
Arroyo Seco: days with a maximum temperature at or above 90 F (32.2 C) in 20 years, most in 1980 with 146.
Arroyo Seco: days with a maximum temperature at or above 100 F (37.8 C) in 20 years, most in 1975 with 49.
13 fixed thresholds have at least one qualifying day at Arroyo Seco.

Days at or above 30 C (86 F)

20 years with a qualifying day

Days per year at Arroyo Seco with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 234 in 2006.

Days at or above 30 C (86 F) per year at Arroyo Seco
Year	Days	Decade average
1975	191	196.4
1976	162	196.4
1977	208	196.4
1978	207	196.4
1979	214	196.4
1980	208	173.1
1981	166	173.1
1982	201	173.1
1983	164	173.1
1984	137	173.1
1985	186	173.1
1986	191	173.1
1987	161	173.1
1988	148	173.1
1989	169	173.1
1991	164	179.8
1993	162	179.8
1994	196	179.8
1995	197	179.8
2006	234	234

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

First to last qualifying date each year at Arroyo Seco
Year	First date	Last date
1975	1975-01-09	1975-12-24
1976	1976-01-02	1976-12-29
1977	1977-01-09	1977-12-30
1978	1978-01-01	1978-12-23
1979	1979-01-13	1979-12-23
1980	1980-01-08	1980-12-08
1981	1981-01-31	1981-12-28
1982	1982-01-03	1982-12-24
1983	1983-01-29	1983-11-27
1984	1984-01-23	1984-12-14
1985	1985-01-10	1985-12-31
1986	1986-01-04	1986-12-23
1987	1987-01-16	1987-12-25
1988	1988-01-17	1988-12-31
1989	1989-01-06	1989-12-28
1991	1991-01-05	1991-12-02
1993	1993-01-06	1993-12-14
1994	1994-01-06	1994-11-07
1995	1995-01-11	1995-11-29
2006	2006-01-03	2006-11-30

Every Fixed Threshold

Fixed thresholds at Arroyo Seco
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	20	234	2006	234
35 C (95 F): Days	20	99	1980	56
40 C (104 F): Days	19	27	1975	11
45 C (113 F): Days	3	3	1995	3
90 F (32.2 C): Days	20	146	1980	129
100 F (37.8 C): Days	20	49	1975	26
110 F (43.3 C): Days	6	5	1978	4
0 C (32 F): Frost days (min	11	5	1985	4
20 C (68 F): Tropical nights (min	18	97	1977	58
25 C (77 F): Days with min	2	2	1991	1
10 mm (0.39 in): Days with 10 mm or more rain	20	26	1981	17
25 mm (0.98 in): Days with 25 mm or more rain	17	11	1981	5
50 mm (1.97 in): Days with 50 mm or more rain	10	3	1981	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1975.

Download the Data

Data for Arroyo Seco 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).

Arroyo Seco Threshold Days by Year (MXN00022036)

Key Facts for Arroyo Seco Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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