Zimatlan Threshold Days by Year (MXN00020209)

11 fixed thresholds counted per year at Zimatlan (MXN00020209): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Zimatlan Thresholds

Zimatlan: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1988 with 38.
Zimatlan: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 2009 with 14.
Zimatlan: days with a maximum temperature at or above 30 C (86 F) in 20 years, most in 2008 with 281.
Zimatlan: days with a maximum temperature at or above 90 F (32.2 C) in 20 years, most in 2006 with 186.
11 fixed thresholds have at least one qualifying day at Zimatlan.

Days at or above 30 C (86 F)

20 years with a qualifying day

Days per year at Zimatlan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 281 in 2008.

Days at or above 30 C (86 F) per year at Zimatlan
Year	Days	Decade average
1973	147	104.4
1974	94	104.4
1975	108	104.4
1976	85	104.4
1977	107	104.4
1978	92	104.4
1979	98	104.4
1980	104	89
1981	87	89
1982	74	89
1983	91	89
1996	213	235.7
1997	278	235.7
1998	216	235.7
2000	234	251
2001	258	251
2006	270	251
2008	281	251
2009	212	251
2011	148	148

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

First to last qualifying date each year at Zimatlan
Year	First date	Last date
1973	1973-01-03	1973-11-27
1974	1974-01-20	1974-12-15
1975	1975-01-28	1975-11-30
1976	1976-01-26	1976-12-31
1977	1977-01-05	1977-12-31
1978	1978-01-01	1978-12-16
1979	1979-01-26	1979-12-13
1980	1980-01-11	1980-12-09
1981	1981-02-01	1981-05-27
1982	1982-01-23	1982-09-06
1983	1983-02-01	1983-08-20
1996	1996-01-06	1996-12-29
1997	1997-01-01	1997-12-31
1998	1998-01-05	1998-12-28
2000	2000-01-01	2000-12-01
2001	2001-02-15	2001-12-26
2006	2006-01-14	2006-10-29
2008	2008-01-01	2008-12-26
2009	2009-01-08	2009-12-21
2011	2011-01-04	2011-11-26

Every Fixed Threshold

Fixed thresholds at Zimatlan
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	20	281	2008	148
35 C (95 F): Days	19	105	2006	8
40 C (104 F): Days	1	2	1998	2
90 F (32.2 C): Days	20	186	2006	39
100 F (37.8 C): Days	9	12	1998	1
0 C (32 F): Frost days (min	6	4	1976	4
20 C (68 F): Tropical nights (min	3	1	1978	1
10 mm (0.39 in): Days with 10 mm or more rain	30	38	1988	37
25 mm (0.98 in): Days with 25 mm or more rain	30	14	2009	8
50 mm (1.97 in): Days with 50 mm or more rain	16	2	1981	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	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 1973.

Download the Data

Data for Zimatlan 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).

Zimatlan Threshold Days by Year (MXN00020209)

Key Facts for Zimatlan Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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