Atotonilco Threshold Days by Year (MXN00013096)

8 fixed thresholds counted per year at Atotonilco (MXN00013096): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Atotonilco Thresholds

Atotonilco: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 1998 with 63.
Atotonilco: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 2007 with 37.
Atotonilco: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1998 with 12.
Atotonilco: days with a maximum temperature at or above 90 F (32.2 C) in 26 years, most in 1998 with 25.
8 fixed thresholds have at least one qualifying day at Atotonilco.

Days at or above 30 C (86 F)

37 years with a qualifying day

Days per year at Atotonilco with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 63 in 1998.

Days at or above 30 C (86 F) per year at Atotonilco
Year	Days	Decade average
1975	23	18.6
1976	7	18.6
1977	14	18.6
1978	25	18.6
1979	24	18.6
1980	21	22.1
1981	13	22.1
1982	29	22.1
1983	46	22.1
1984	31	22.1
1985	11	22.1
1986	20	22.1
1987	13	22.1
1988	28	22.1
1989	9	22.1
1990	14	24.6
1991	45	24.6
1992	2	24.6
1993	15	24.6
1994	18	24.6
1995	38	24.6
1996	24	24.6
1997	7	24.6
1998	63	24.6
1999	20	24.6
2000	12	20.6
2001	12	20.6
2002	11	20.6
2003	32	20.6
2004	14	20.6
2005	35	20.6
2006	23	20.6
2007	16	20.6
2008	22	20.6
2009	29	20.6
2010	23	33
2011	43	33

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

First to last qualifying date each year at Atotonilco
Year	First date	Last date
1975	1975-03-12	1975-05-07
1976	1976-03-28	1976-10-04
1977	1977-03-05	1977-04-04
1978	1978-03-12	1978-11-24
1979	1979-03-23	1979-05-30
1980	1980-03-07	1980-05-16
1981	1981-03-21	1981-05-18
1982	1982-03-12	1982-06-04
1983	1983-03-18	1983-06-13
1984	1984-03-18	1984-05-07
1985	1985-03-03	1985-05-14
1986	1986-03-11	1986-05-16
1987	1987-03-17	1987-05-29
1988	1988-02-18	1988-06-04
1989	1989-03-28	1989-06-09
1990	1990-03-14	1990-05-31
1991	1991-03-02	1991-06-05
1992	1992-03-18	1992-03-21
1993	1993-02-15	1993-06-07
1994	1994-03-08	1994-05-26
1995	1995-03-21	1995-06-08
1996	1996-02-23	1996-05-29
1997	1997-02-28	1997-12-09
1998	1998-02-18	1998-06-26
1999	1999-04-01	1999-05-17
2000	2000-03-28	2000-05-25
2001	2001-03-14	2001-05-21
2002	2002-03-15	2002-05-03
2003	2003-03-03	2003-05-19
2004	2004-03-02	2004-05-29
2005	2005-03-24	2005-06-13
2006	2006-03-11	2006-05-10
2007	2007-02-28	2007-06-08
2008	2008-03-17	2008-05-13
2009	2009-03-24	2009-06-11
2010	2010-03-11	2010-06-09
2011	2011-03-25	2011-06-20

Every Fixed Threshold

Fixed thresholds at Atotonilco
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	37	63	1998	43
35 C (95 F): Days	5	6	1998	1
90 F (32.2 C): Days	26	25	1998	9
0 C (32 F): Frost days (min	25	12	1989	1
10 mm (0.39 in): Days with 10 mm or more rain	37	37	2007	25
25 mm (0.98 in): Days with 25 mm or more rain	37	12	1998	11
50 mm (1.97 in): Days with 50 mm or more rain	20	4	1998	4
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1988	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 Atotonilco 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).

Atotonilco Threshold Days by Year (MXN00013096)

Key Facts for Atotonilco Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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