Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

San Isidro Threshold Days by Year (MXN00001024)

8 fixed thresholds counted per year at San Isidro (MXN00001024): 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 10 mm (0.39 in) or more of precipitation in 41 years, most in 1973 with 27.
  • San Isidro: days with 25 mm (0.98 in) or more of precipitation in 39 years, most in 1991 with 9.
  • San Isidro: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 2003 with 141.
  • San Isidro: nights with a minimum temperature at or below 0 C (32 F) in 36 years, most in 1973 with 41.
  • 8 fixed thresholds have at least one qualifying day at San Isidro.
37 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 141 in 2003. 0501001501971: 361972: 591973: 441974: 411975: 211977: 361978: 171979: 151983: 391984: 151985: 111986: 201987: 141988: 291989: 351990: 291991: 411992: 241993: 151994: 161995: 241996: 201997: 131998: 581999: 282000: 882002: 872003: 1412004: 462005: 832006: 642007: 442008: 902009: 282010: 632011: 912012: 291971197519831987199119951999200420082012
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 141 in 2003.
Days at or above 30 C (86 F) per year at San Isidro
YearDaysDecade average
19713633.6
19725933.6
19734433.6
19744133.6
19752133.6
19773633.6
19781733.6
19791533.6
19833923.3
19841523.3
19851123.3
19862023.3
19871423.3
19882923.3
19893523.3
19902926.8
19914126.8
19922426.8
19931526.8
19941626.8
19952426.8
19962026.8
19971326.8
19985826.8
19992826.8
20008874.6
20028774.6
200314174.6
20044674.6
20058374.6
20066474.6
20074474.6
20089074.6
20092874.6
20106361
20119161
20122961
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). 1971: 29 March 1971 to 10 June 19711972: 4 April 1972 to 7 September 19721973: 5 February 1973 to 19 June 19731974: 4 March 1974 to 13 June 19741975: 9 April 1975 to 16 June 19751977: 15 March 1977 to 11 October 19771978: 31 March 1978 to 16 July 19781979: 31 March 1979 to 13 July 19791983: 18 April 1983 to 29 June 19831984: 15 March 1984 to 31 May 19841985: 10 May 1985 to 4 June 19851986: 7 April 1986 to 19 November 19861987: 14 May 1987 to 12 September 19871988: 5 April 1988 to 15 November 19881989: 11 April 1989 to 25 July 19891990: 5 April 1990 to 8 June 19901991: 8 March 1991 to 12 June 19911992: 4 May 1992 to 2 July 19921993: 29 April 1993 to 9 June 19931994: 1 May 1994 to 8 July 19941995: 28 March 1995 to 10 June 19951996: 7 May 1996 to 22 June 19961997: 4 June 1997 to 23 August 19971998: 6 April 1998 to 15 July 19981999: 9 April 1999 to 12 July 19992000: 3 April 2000 to 18 November 20002002: 9 March 2002 to 8 August 20022003: 12 February 2003 to 8 November 20032004: 18 March 2004 to 31 October 20042005: 8 April 2005 to 31 August 20052006: 8 March 2006 to 20 July 20062007: 16 April 2007 to 29 August 20072008: 1 April 2008 to 27 October 20082009: 6 April 2009 to 31 August 20092010: 9 May 2010 to 8 September 20102011: 27 March 2011 to 26 September 20112012: 13 May 2012 to 17 June 201219711977198519901995200020062011JanFebMarAprMayJunJulAugSepOctNovDec
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
19711971-03-291971-06-10
19721972-04-041972-09-07
19731973-02-051973-06-19
19741974-03-041974-06-13
19751975-04-091975-06-16
19771977-03-151977-10-11
19781978-03-311978-07-16
19791979-03-311979-07-13
19831983-04-181983-06-29
19841984-03-151984-05-31
19851985-05-101985-06-04
19861986-04-071986-11-19
19871987-05-141987-09-12
19881988-04-051988-11-15
19891989-04-111989-07-25
19901990-04-051990-06-08
19911991-03-081991-06-12
19921992-05-041992-07-02
19931993-04-291993-06-09
19941994-05-011994-07-08
19951995-03-281995-06-10
19961996-05-071996-06-22
19971997-06-041997-08-23
19981998-04-061998-07-15
19991999-04-091999-07-12
20002000-04-032000-11-18
20022002-03-092002-08-08
20032003-02-122003-11-08
20042004-03-182004-10-31
20052005-04-082005-08-31
20062006-03-082006-07-20
20072007-04-162007-08-29
20082008-04-012008-10-27
20092009-04-062009-08-31
20102010-05-092010-09-08
20112011-03-272011-09-26
20122012-05-132012-06-17

Every Fixed Threshold

Fixed thresholds at San Isidro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days37141200329
35 C (95 F): Days819200819
90 F (32.2 C): Days274720084
0 C (32 F): Frost days (min364119735
20 C (68 F): Tropical nights (min2120051
10 mm (0.39 in): Days with 10 mm or more rain4127197320
25 mm (0.98 in): Days with 25 mm or more rain39919913
50 mm (1.97 in): Days with 50 mm or more rain9319921

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

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).