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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Chontalcoatlan Threshold Days by Year (MXN00012171)

10 fixed thresholds counted per year at Chontalcoatlan (MXN00012171): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chontalcoatlan Thresholds

  • Chontalcoatlan: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 1978 with 51.
  • Chontalcoatlan: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 1980 with 22.
  • Chontalcoatlan: days with a maximum temperature at or above 30 C (86 F) in 25 years, most in 2011 with 338.
  • Chontalcoatlan: days with a maximum temperature at or above 35 C (95 F) in 25 years, most in 2011 with 160.
  • 10 fixed thresholds have at least one qualifying day at Chontalcoatlan.
25 years with a qualifying day
Days at or above 30 C (86 F) per year at Chontalcoatlan Days per year at Chontalcoatlan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 338 in 2011. 01002003004001977: 1451978: 1331979: 1881980: 1551981: 1311982: 2621983: 2081984: 1291986: 1861987: 2001988: 1791992: 1081993: 1681994: 1811995: 1561996: 1662001: 1782002: 2822003: 3232004: 3212005: 3202009: 3012010: 3192011: 3382012: 282197719801983198719931996200320092012
Days per year at Chontalcoatlan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 338 in 2011.
Days at or above 30 C (86 F) per year at Chontalcoatlan
YearDaysDecade average
1977145155.3
1978133155.3
1979188155.3
1980155181.3
1981131181.3
1982262181.3
1983208181.3
1984129181.3
1986186181.3
1987200181.3
1988179181.3
1992108155.8
1993168155.8
1994181155.8
1995156155.8
1996166155.8
2001178287.5
2002282287.5
2003323287.5
2004321287.5
2005320287.5
2009301287.5
2010319313
2011338313
2012282313
First to last qualifying date each year at Chontalcoatlan For each year, a bar from the first to the last day at Chontalcoatlan meeting 30 C (86 F). 1977: 24 January 1977 to 30 December 19771978: 1 January 1978 to 1 December 19781979: 20 January 1979 to 24 December 19791980: 6 January 1980 to 21 November 19801981: 31 January 1981 to 31 December 19811982: 2 January 1982 to 30 December 19821983: 10 January 1983 to 21 December 19831984: 8 January 1984 to 11 November 19841986: 25 January 1986 to 29 December 19861987: 7 January 1987 to 26 December 19871988: 7 January 1988 to 31 December 19881992: 14 February 1992 to 20 December 19921993: 10 January 1993 to 10 December 19931994: 16 January 1994 to 18 December 19941995: 15 January 1995 to 15 December 19951996: 23 January 1996 to 31 December 19962001: 16 January 2001 to 15 December 20012002: 17 January 2002 to 1 December 20022003: 22 January 2003 to 21 December 20032004: 21 January 2004 to 19 December 20042005: 22 January 2005 to 22 December 20052009: 23 January 2009 to 31 December 20092010: 1 January 2010 to 31 December 20102011: 1 January 2011 to 28 December 20112012: 1 January 2012 to 17 December 20121977198119861993200120052012JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chontalcoatlan meeting 30 C (86 F).
First to last qualifying date each year at Chontalcoatlan
YearFirst dateLast date
19771977-01-241977-12-30
19781978-01-011978-12-01
19791979-01-201979-12-24
19801980-01-061980-11-21
19811981-01-311981-12-31
19821982-01-021982-12-30
19831983-01-101983-12-21
19841984-01-081984-11-11
19861986-01-251986-12-29
19871987-01-071987-12-26
19881988-01-071988-12-31
19921992-02-141992-12-20
19931993-01-101993-12-10
19941994-01-161994-12-18
19951995-01-151995-12-15
19961996-01-231996-12-31
20012001-01-162001-12-15
20022002-01-172002-12-01
20032003-01-222003-12-21
20042004-01-212004-12-19
20052005-01-222005-12-22
20092009-01-232009-12-31
20102010-01-012010-12-31
20112011-01-012011-12-28
20122012-01-012012-12-17

Every Fixed Threshold

Fixed thresholds at Chontalcoatlan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days253382011282
35 C (95 F): Days251602011115
40 C (104 F): Days61720113
90 F (32.2 C): Days252752011181
100 F (37.8 C): Days1869201137
0 C (32 F): Frost days (min2319823
20 C (68 F): Tropical nights (min151819931
10 mm (0.39 in): Days with 10 mm or more rain3151197846
25 mm (0.98 in): Days with 25 mm or more rain3122198013
50 mm (1.97 in): Days with 50 mm or more rain23520021

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1977.

Download the Data

  • Data for Chontalcoatlan 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 . Last revised (2025-12-31).