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

El Mayor Threshold Days by Year (MXN00002020)

16 fixed thresholds counted per year at El Mayor (MXN00002020): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for El Mayor Thresholds

  • El Mayor: days with a maximum temperature at or above 30 C (86 F) in 23 years, most in 1989 with 242.
  • El Mayor: days with a maximum temperature at or above 35 C (95 F) in 23 years, most in 2006 with 204.
  • El Mayor: days with a maximum temperature at or above 40 C (104 F) in 23 years, most in 2009 with 164.
  • El Mayor: days with a maximum temperature at or above 45 C (113 F) in 23 years, most in 2009 with 137.
  • 16 fixed thresholds have at least one qualifying day at El Mayor.
23 years with a qualifying day
Days at or above 30 C (86 F) per year at El Mayor Days per year at El Mayor with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 242 in 1989. 01002003001969: 1891970: 2191971: 1941972: 2151973: 2101982: 1931985: 1861986: 2131987: 1861988: 2271989: 2421991: 2062000: 1532001: 1632003: 1902004: 1542005: 1662006: 2282007: 1882008: 1702009: 2102010: 2042011: 20719691972198519882000200420072010
Days per year at El Mayor with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 242 in 1989.
Days at or above 30 C (86 F) per year at El Mayor
YearDaysDecade average
1969189189
1970219209.5
1971194209.5
1972215209.5
1973210209.5
1982193207.8
1985186207.8
1986213207.8
1987186207.8
1988227207.8
1989242207.8
1991206206
2000153180.2
2001163180.2
2003190180.2
2004154180.2
2005166180.2
2006228180.2
2007188180.2
2008170180.2
2009210180.2
2010204205.5
2011207205.5
First to last qualifying date each year at El Mayor For each year, a bar from the first to the last day at El Mayor meeting 30 C (86 F). 1969: 1 January 1969 to 4 November 19691970: 15 March 1970 to 31 December 19701971: 1 January 1971 to 1 December 19711972: 4 February 1972 to 27 October 19721973: 5 February 1973 to 23 November 19731982: 16 February 1982 to 28 October 19821985: 9 March 1985 to 8 November 19851986: 24 February 1986 to 15 November 19861987: 11 March 1987 to 28 October 19871988: 13 February 1988 to 13 November 19881989: 23 February 1989 to 17 November 19891991: 15 January 1991 to 8 November 19912000: 10 May 2000 to 27 October 20002001: 11 May 2001 to 26 November 20012003: 8 May 2003 to 3 December 20032004: 17 May 2004 to 9 November 20042005: 16 May 2005 to 8 November 20052006: 3 April 2006 to 29 November 20062007: 2 May 2007 to 15 November 20072008: 21 March 2008 to 1 November 20082009: 14 April 2009 to 28 November 20092010: 31 March 2010 to 12 November 20102011: 19 March 2011 to 4 November 201119691972198519882000200420072010JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at El Mayor meeting 30 C (86 F).
First to last qualifying date each year at El Mayor
YearFirst dateLast date
19691969-01-011969-11-04
19701970-03-151970-12-31
19711971-01-011971-12-01
19721972-02-041972-10-27
19731973-02-051973-11-23
19821982-02-161982-10-28
19851985-03-091985-11-08
19861986-02-241986-11-15
19871987-03-111987-10-28
19881988-02-131988-11-13
19891989-02-231989-11-17
19911991-01-151991-11-08
20002000-05-102000-10-27
20012001-05-112001-11-26
20032003-05-082003-12-03
20042004-05-172004-11-09
20052005-05-162005-11-08
20062006-04-032006-11-29
20072007-05-022007-11-15
20082008-03-212008-11-01
20092009-04-142009-11-28
20102010-03-312010-11-12
20112011-03-192011-11-04

Every Fixed Threshold

Fixed thresholds at El Mayor
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days232421989207
35 C (95 F): Days232042006169
40 C (104 F): Days231642009129
45 C (113 F): Days23137200969
50 C (122 F): Days132120016
90 F (32.2 C): Days232122006189
100 F (37.8 C): Days231732010136
110 F (43.3 C): Days23146200981
120 F (48.9 C): Days1438200512
0 C (32 F): Frost days (min121519722
20 C (68 F): Tropical nights (min1410919864
25 C (77 F): Days with min1260198642
10 mm (0.39 in): Days with 10 mm or more rain17519822
25 mm (0.98 in): Days with 25 mm or more rain9219911
50 mm (1.97 in): Days with 50 mm or more rain2119721
100 mm (3.94 in): Days with 100 mm or more rain1119721

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1969.

Download the Data

  • Data for El Mayor 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).