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

San Isidro Threshold Days by Year (MXN00026082)

16 fixed thresholds counted per year at San Isidro (MXN00026082): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Isidro Thresholds

  • San Isidro: days with a maximum temperature at or above 30 C (86 F) in 47 years, most in 1981 with 265.
  • San Isidro: days with a maximum temperature at or above 35 C (95 F) in 47 years, most in 1993 with 191.
  • San Isidro: days with a maximum temperature at or above 40 C (104 F) in 47 years, most in 2001 with 113.
  • San Isidro: days with a maximum temperature at or above 90 F (32.2 C) in 47 years, most in 2007 with 218.
  • 16 fixed thresholds have at least one qualifying day at San Isidro.
47 years with a qualifying day
Days at or above 30 C (86 F) per year at San Isidro Days per year at San Isidro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 265 in 1981. 01002003001957: 1881958: 2041959: 2191960: 2001961: 2011962: 2081963: 2191964: 1931965: 1951966: 2161967: 2041968: 2051969: 2051970: 1981971: 1971972: 2151973: 1941974: 2061975: 1881976: 1931977: 2081978: 2131979: 2241980: 2351981: 2651982: 2391983: 2351984: 2551985: 2451987: 2511988: 2171993: 2471994: 2241995: 2431996: 2601997: 2501998: 2492000: 2492001: 2562003: 2112006: 2502007: 2432008: 2012009: 2492010: 2482011: 2382012: 2581957196219671972197719821988199720062011
Days per year at San Isidro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 265 in 1981.
Days at or above 30 C (86 F) per year at San Isidro
YearDaysDecade average
1957188203.7
1958204203.7
1959219203.7
1960200204.6
1961201204.6
1962208204.6
1963219204.6
1964193204.6
1965195204.6
1966216204.6
1967204204.6
1968205204.6
1969205204.6
1970198203.6
1971197203.6
1972215203.6
1973194203.6
1974206203.6
1975188203.6
1976193203.6
1977208203.6
1978213203.6
1979224203.6
1980235242.8
1981265242.8
1982239242.8
1983235242.8
1984255242.8
1985245242.8
1987251242.8
1988217242.8
1993247245.5
1994224245.5
1995243245.5
1996260245.5
1997250245.5
1998249245.5
2000249237
2001256237
2003211237
2006250237
2007243237
2008201237
2009249237
2010248248
2011238248
2012258248
First to last qualifying date each year at San Isidro For each year, a bar from the first to the last day at San Isidro meeting 30 C (86 F). 1957: 4 February 1957 to 16 December 19571958: 30 January 1958 to 9 December 19581959: 17 February 1959 to 18 November 19591960: 1 March 1960 to 29 December 19601961: 10 February 1961 to 6 November 19611962: 25 March 1962 to 24 November 19621963: 31 January 1963 to 29 November 19631964: 15 March 1964 to 10 November 19641965: 17 January 1965 to 6 December 19651966: 9 March 1966 to 30 November 19661967: 28 February 1967 to 20 November 19671968: 21 February 1968 to 25 November 19681969: 17 March 1969 to 9 November 19691970: 8 February 1970 to 12 November 19701971: 12 February 1971 to 24 December 19711972: 18 February 1972 to 3 November 19721973: 12 April 1973 to 1 December 19731974: 28 February 1974 to 13 November 19741975: 1 March 1975 to 9 December 19751976: 16 January 1976 to 22 November 19761977: 13 February 1977 to 6 December 19771978: 29 January 1978 to 9 November 19781979: 13 February 1979 to 9 December 19791980: 13 January 1980 to 30 December 19801981: 3 January 1981 to 20 December 19811982: 16 February 1982 to 25 November 19821983: 15 January 1983 to 4 December 19831984: 3 February 1984 to 15 November 19841985: 13 February 1985 to 31 December 19851987: 26 January 1987 to 16 December 19871988: 28 January 1988 to 26 November 19881993: 5 March 1993 to 31 December 19931994: 1 January 1994 to 25 November 19941995: 4 February 1995 to 12 December 19951996: 8 January 1996 to 7 December 19961997: 27 January 1997 to 25 November 19971998: 25 January 1998 to 31 December 19982000: 12 January 2000 to 6 December 20002001: 2 January 2001 to 25 November 20012003: 19 January 2003 to 6 December 20032006: 5 January 2006 to 26 November 20062007: 7 February 2007 to 21 November 20072008: 5 January 2008 to 24 November 20082009: 16 January 2009 to 28 November 20092010: 17 February 2010 to 17 December 20102011: 7 February 2011 to 28 November 20112012: 1 January 2012 to 30 November 201219571963196919751981198819982008JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at San Isidro meeting 30 C (86 F).
First to last qualifying date each year at San Isidro
YearFirst dateLast date
19571957-02-041957-12-16
19581958-01-301958-12-09
19591959-02-171959-11-18
19601960-03-011960-12-29
19611961-02-101961-11-06
19621962-03-251962-11-24
19631963-01-311963-11-29
19641964-03-151964-11-10
19651965-01-171965-12-06
19661966-03-091966-11-30
19671967-02-281967-11-20
19681968-02-211968-11-25
19691969-03-171969-11-09
19701970-02-081970-11-12
19711971-02-121971-12-24
19721972-02-181972-11-03
19731973-04-121973-12-01
19741974-02-281974-11-13
19751975-03-011975-12-09
19761976-01-161976-11-22
19771977-02-131977-12-06
19781978-01-291978-11-09
19791979-02-131979-12-09
19801980-01-131980-12-30
19811981-01-031981-12-20
19821982-02-161982-11-25
19831983-01-151983-12-04
19841984-02-031984-11-15
19851985-02-131985-12-31
19871987-01-261987-12-16
19881988-01-281988-11-26
19931993-03-051993-12-31
19941994-01-011994-11-25
19951995-02-041995-12-12
19961996-01-081996-12-07
19971997-01-271997-11-25
19981998-01-251998-12-31
20002000-01-122000-12-06
20012001-01-022001-11-25
20032003-01-192003-12-06
20062006-01-052006-11-26
20072007-02-072007-11-21
20082008-01-052008-11-24
20092009-01-162009-11-28
20102010-02-172010-12-17
20112011-02-072011-11-28
20122012-01-012012-11-30

Every Fixed Threshold

Fixed thresholds at San Isidro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days472651981258
35 C (95 F): Days471911993168
40 C (104 F): Days47113200160
45 C (113 F): Days242319983
50 C (122 F): Days1219982
90 F (32.2 C): Days472182007203
100 F (37.8 C): Days471462000110
110 F (43.3 C): Days323119986
120 F (48.9 C): Days1219982
0 C (32 F): Frost days (min363619644
20 C (68 F): Tropical nights (min471262008121
25 C (77 F): Days with min4784200874
10 mm (0.39 in): Days with 10 mm or more rain46919612
25 mm (0.98 in): Days with 25 mm or more rain37519591
50 mm (1.97 in): Days with 50 mm or more rain20319942
100 mm (3.94 in): Days with 100 mm or more rain3119591

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

  • Data for San Isidro 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).