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Built 2026-10-19 (19 October 2026)

Ameca Threshold Days by Year (MXN00014009)

12 fixed thresholds counted per year at Ameca (MXN00014009): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ameca Thresholds

  • Ameca: days with 10 mm (0.39 in) or more of precipitation in 66 years, most in 1980 with 46.
  • Ameca: days with 25 mm (0.98 in) or more of precipitation in 66 years, most in 1959 with 17.
  • Ameca: days with 50 mm (1.97 in) or more of precipitation in 44 years, most in 1959 with 8.
  • Ameca: days with a maximum temperature at or above 30 C (86 F) in 40 years, most in 1929 with 325.
  • 12 fixed thresholds have at least one qualifying day at Ameca.
40 years with a qualifying day
Days at or above 30 C (86 F) per year at Ameca Days per year at Ameca with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 325 in 1929. 01002003004001926: 2471927: 3081928: 3161929: 3251930: 2941931: 2641962: 2061964: 1701965: 1681966: 1771967: 2031979: 2741980: 2601981: 2731982: 3021983: 2281984: 2121985: 2171986: 2341987: 2421989: 2411990: 1991991: 1881992: 1681996: 1911997: 1941998: 2061999: 1962000: 1902001: 1772002: 1942003: 1742004: 1492005: 1802006: 1792007: 1502008: 1582009: 2072010: 1772011: 1811926193019651980198419891996200020042008
Days per year at Ameca with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 325 in 1929.
Days at or above 30 C (86 F) per year at Ameca
YearDaysDecade average
1926247299
1927308299
1928316299
1929325299
1930294279
1931264279
1962206184.8
1964170184.8
1965168184.8
1966177184.8
1967203184.8
1979274274
1980260245.4
1981273245.4
1982302245.4
1983228245.4
1984212245.4
1985217245.4
1986234245.4
1987242245.4
1989241245.4
1990199191.7
1991188191.7
1992168191.7
1996191191.7
1997194191.7
1998206191.7
1999196191.7
2000190175.8
2001177175.8
2002194175.8
2003174175.8
2004149175.8
2005180175.8
2006179175.8
2007150175.8
2008158175.8
2009207175.8
2010177179
2011181179
First to last qualifying date each year at Ameca For each year, a bar from the first to the last day at Ameca meeting 30 C (86 F). 1926: 19 January 1926 to 30 December 19261927: 21 January 1927 to 31 December 19271928: 1 January 1928 to 31 December 19281929: 2 January 1929 to 30 December 19291930: 3 January 1930 to 30 December 19301931: 9 January 1931 to 30 December 19311962: 16 January 1962 to 26 November 19621964: 11 February 1964 to 25 November 19641965: 9 February 1965 to 13 December 19651966: 26 February 1966 to 29 December 19661967: 28 January 1967 to 2 December 19671979: 5 January 1979 to 31 December 19791980: 1 January 1980 to 31 December 19801981: 29 January 1981 to 31 December 19811982: 4 January 1982 to 23 December 19821983: 27 January 1983 to 25 December 19831984: 16 January 1984 to 24 December 19841985: 25 January 1985 to 30 December 19851986: 1 January 1986 to 17 December 19861987: 7 January 1987 to 24 December 19871989: 2 January 1989 to 29 November 19891990: 21 January 1990 to 12 December 19901991: 2 January 1991 to 3 December 19911992: 18 February 1992 to 31 December 19921996: 25 January 1996 to 11 December 19961997: 25 January 1997 to 9 December 19971998: 19 February 1998 to 29 December 19981999: 30 January 1999 to 20 November 19992000: 1 January 2000 to 16 December 20002001: 8 February 2001 to 21 December 20012002: 18 January 2002 to 11 November 20022003: 22 January 2003 to 24 November 20032004: 26 February 2004 to 3 December 20042005: 5 January 2005 to 13 December 20052006: 21 January 2006 to 5 November 20062007: 21 February 2007 to 20 December 20072008: 23 January 2008 to 21 December 20082009: 9 January 2009 to 11 December 20092010: 4 March 2010 to 2 December 20102011: 5 January 2011 to 28 December 201119261931196719831989199720022007JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ameca meeting 30 C (86 F).
First to last qualifying date each year at Ameca
YearFirst dateLast date
19261926-01-191926-12-30
19271927-01-211927-12-31
19281928-01-011928-12-31
19291929-01-021929-12-30
19301930-01-031930-12-30
19311931-01-091931-12-30
19621962-01-161962-11-26
19641964-02-111964-11-25
19651965-02-091965-12-13
19661966-02-261966-12-29
19671967-01-281967-12-02
19791979-01-051979-12-31
19801980-01-011980-12-31
19811981-01-291981-12-31
19821982-01-041982-12-23
19831983-01-271983-12-25
19841984-01-161984-12-24
19851985-01-251985-12-30
19861986-01-011986-12-17
19871987-01-071987-12-24
19891989-01-021989-11-29
19901990-01-211990-12-12
19911991-01-021991-12-03
19921992-02-181992-12-31
19961996-01-251996-12-11
19971997-01-251997-12-09
19981998-02-191998-12-29
19991999-01-301999-11-20
20002000-01-012000-12-16
20012001-02-082001-12-21
20022002-01-182002-11-11
20032003-01-222003-11-24
20042004-02-262004-12-03
20052005-01-052005-12-13
20062006-01-212006-11-05
20072007-02-212007-12-20
20082008-01-232008-12-21
20092009-01-092009-12-11
20102010-03-042010-12-02
20112011-01-052011-12-28

Every Fixed Threshold

Fixed thresholds at Ameca
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days403251929181
35 C (95 F): Days40235192748
40 C (104 F): Days1119821
90 F (32.2 C): Days402741927108
100 F (37.8 C): Days1919319272
0 C (32 F): Frost days (min54219296
20 C (68 F): Tropical nights (min261720107
10 mm (0.39 in): Days with 10 mm or more rain6646198024
25 mm (0.98 in): Days with 25 mm or more rain661719598
50 mm (1.97 in): Days with 50 mm or more rain44819591
100 mm (3.94 in): Days with 100 mm or more rain3519595
200 mm (7.87 in): Days with 200 mm or more rain1119591

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.

Download the Data

  • Data for Ameca 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).