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Built 2026-10-19 (19 October 2026)

C.I.A.P.Y. Threshold Days by Year (MXN00031005)

14 fixed thresholds counted per year at C.I.A.P.Y. (MXN00031005): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for C.I.A.P.Y. Thresholds

  • C.I.A.P.Y.: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1971 with 338.
  • C.I.A.P.Y.: days with a maximum temperature at or above 35 C (95 F) in 30 years, most in 2002 with 207.
  • C.I.A.P.Y.: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 2004 with 275.
  • C.I.A.P.Y.: nights with a minimum temperature at or above 20 C (68 F) in 30 years, most in 1973 with 249.
  • 14 fixed thresholds have at least one qualifying day at C.I.A.P.Y..
30 years with a qualifying day
Days at or above 30 C (86 F) per year at C.I.A.P.Y. Days per year at C.I.A.P.Y. with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 338 in 1971. 01002003004001970: 3201971: 3381973: 3331974: 3171975: 2961978: 3331979: 3201980: 2871982: 3101984: 2651985: 2451986: 2611987: 2541988: 2551990: 2121991: 1911992: 1841993: 1881994: 2441995: 2701996: 3181997: 3301998: 3301999: 3232000: 3212001: 3352002: 3152003: 3072004: 3352005: 2951970197419791984198719911994199720002003
Days per year at C.I.A.P.Y. with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 338 in 1971.
Days at or above 30 C (86 F) per year at C.I.A.P.Y.
YearDaysDecade average
1970320322.4
1971338322.4
1973333322.4
1974317322.4
1975296322.4
1978333322.4
1979320322.4
1980287268.1
1982310268.1
1984265268.1
1985245268.1
1986261268.1
1987254268.1
1988255268.1
1990212259
1991191259
1992184259
1993188259
1994244259
1995270259
1996318259
1997330259
1998330259
1999323259
2000321318
2001335318
2002315318
2003307318
2004335318
2005295318
First to last qualifying date each year at C.I.A.P.Y. For each year, a bar from the first to the last day at C.I.A.P.Y. meeting 30 C (86 F). 1970: 2 January 1970 to 31 December 19701971: 1 January 1971 to 31 December 19711973: 1 January 1973 to 31 December 19731974: 1 January 1974 to 31 December 19741975: 1 January 1975 to 31 December 19751978: 1 January 1978 to 31 December 19781979: 1 January 1979 to 30 December 19791980: 8 January 1980 to 29 December 19801982: 1 January 1982 to 31 December 19821984: 9 January 1984 to 31 December 19841985: 1 January 1985 to 13 December 19851986: 9 January 1986 to 22 December 19861987: 14 January 1987 to 31 December 19871988: 17 January 1988 to 31 December 19881990: 1 February 1990 to 3 November 19901991: 15 January 1991 to 20 November 19911992: 15 February 1992 to 25 November 19921993: 6 January 1993 to 11 December 19931994: 7 January 1994 to 9 December 19941995: 7 January 1995 to 31 December 19951996: 1 January 1996 to 31 December 19961997: 2 January 1997 to 31 December 19971998: 3 January 1998 to 31 December 19981999: 1 January 1999 to 26 December 19992000: 2 January 2000 to 29 December 20002001: 2 January 2001 to 24 December 20012002: 11 January 2002 to 31 December 20022003: 3 January 2003 to 30 December 20032004: 1 January 2004 to 30 December 20042005: 1 January 2005 to 30 December 200519701975198219871992199620002004JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at C.I.A.P.Y. meeting 30 C (86 F).
First to last qualifying date each year at C.I.A.P.Y.
YearFirst dateLast date
19701970-01-021970-12-31
19711971-01-011971-12-31
19731973-01-011973-12-31
19741974-01-011974-12-31
19751975-01-011975-12-31
19781978-01-011978-12-31
19791979-01-011979-12-30
19801980-01-081980-12-29
19821982-01-011982-12-31
19841984-01-091984-12-31
19851985-01-011985-12-13
19861986-01-091986-12-22
19871987-01-141987-12-31
19881988-01-171988-12-31
19901990-02-011990-11-03
19911991-01-151991-11-20
19921992-02-151992-11-25
19931993-01-061993-12-11
19941994-01-071994-12-09
19951995-01-071995-12-31
19961996-01-011996-12-31
19971997-01-021997-12-31
19981998-01-031998-12-31
19991999-01-011999-12-26
20002000-01-022000-12-29
20012001-01-022001-12-24
20022002-01-112002-12-31
20032003-01-032003-12-30
20042004-01-012004-12-30
20052005-01-012005-12-30

Every Fixed Threshold

Fixed thresholds at C.I.A.P.Y.
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days303381971295
35 C (95 F): Days302072002143
40 C (104 F): Days2258199820
45 C (113 F): Days1319983
90 F (32.2 C): Days302752004204
100 F (37.8 C): Days28110199845
110 F (43.3 C): Days5619982
20 C (68 F): Tropical nights (min302491973174
25 C (77 F): Days with min211819986
10 mm (0.39 in): Days with 10 mm or more rain3043199541
25 mm (0.98 in): Days with 25 mm or more rain3026199223
50 mm (1.97 in): Days with 50 mm or more rain30919955
100 mm (3.94 in): Days with 100 mm or more rain7220022
200 mm (7.87 in): Days with 200 mm or more rain2119821

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

  • Data for C.I.A.P.Y. 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).