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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 (MXN00011160)

9 fixed thresholds counted per year at San Isidro (MXN00011160): 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 26 years, most in 2011 with 127.
  • San Isidro: days with a maximum temperature at or above 90 F (32.2 C) in 26 years, most in 1998 with 64.
  • San Isidro: nights with a minimum temperature at or below 0 C (32 F) in 26 years, most in 2008 with 98.
  • San Isidro: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 2006 with 22.
  • 9 fixed thresholds have at least one qualifying day at San Isidro.
26 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 127 in 2011. 0501001501981: 511982: 781983: 631984: 411985: 381987: 521988: 621989: 701990: 461994: 611995: 761996: 751997: 631998: 1101999: 1252000: 862001: 822003: 812004: 452005: 1072006: 912007: 792008: 812009: 1172010: 752011: 127198119841988199419972000200420072010
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 127 in 2011.
Days at or above 30 C (86 F) per year at San Isidro
YearDaysDecade average
19815156.9
19827856.9
19836356.9
19844156.9
19853856.9
19875256.9
19886256.9
19897056.9
19904679.4
19946179.4
19957679.4
19967579.4
19976379.4
199811079.4
199912579.4
20008685.4
20018285.4
20038185.4
20044585.4
200510785.4
20069185.4
20077985.4
20088185.4
200911785.4
201075101
2011127101
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). 1981: 5 April 1981 to 17 August 19811982: 1 April 1982 to 30 September 19821983: 18 April 1983 to 7 September 19831984: 29 March 1984 to 5 August 19841985: 26 February 1985 to 8 August 19851987: 15 April 1987 to 19 September 19871988: 3 February 1988 to 26 October 19881989: 17 March 1989 to 17 October 19891990: 7 March 1990 to 29 August 19901994: 21 February 1994 to 5 November 19941995: 21 March 1995 to 7 November 19951996: 20 February 1996 to 17 October 19961997: 24 February 1997 to 1 November 19971998: 23 February 1998 to 20 December 19981999: 2 February 1999 to 30 October 19992000: 14 February 2000 to 27 October 20002001: 20 February 2001 to 20 September 20012003: 10 February 2003 to 23 July 20032004: 2 March 2004 to 24 October 20042005: 27 March 2005 to 23 October 20052006: 16 February 2006 to 19 October 20062007: 22 February 2007 to 18 October 20072008: 18 February 2008 to 12 August 20082009: 18 February 2009 to 7 October 20092010: 3 April 2010 to 27 October 20102011: 16 February 2011 to 20 November 20111981198519901997200120062010JanFebMarAprMayJunJulAugSepOctNovDec
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
19811981-04-051981-08-17
19821982-04-011982-09-30
19831983-04-181983-09-07
19841984-03-291984-08-05
19851985-02-261985-08-08
19871987-04-151987-09-19
19881988-02-031988-10-26
19891989-03-171989-10-17
19901990-03-071990-08-29
19941994-02-211994-11-05
19951995-03-211995-11-07
19961996-02-201996-10-17
19971997-02-241997-11-01
19981998-02-231998-12-20
19991999-02-021999-10-30
20002000-02-142000-10-27
20012001-02-202001-09-20
20032003-02-102003-07-23
20042004-03-022004-10-24
20052005-03-272005-10-23
20062006-02-162006-10-19
20072007-02-222007-10-18
20082008-02-182008-08-12
20092009-02-182009-10-07
20102010-04-032010-10-27
20112011-02-162011-11-20

Every Fixed Threshold

Fixed thresholds at San Isidro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days261272011127
35 C (95 F): Days2123199819
90 F (32.2 C): Days2664199860
100 F (37.8 C): Days3119981
0 C (32 F): Frost days (min2698200892
-10 C (14 F): Days with min6319993
10 mm (0.39 in): Days with 10 mm or more rain262220068
25 mm (0.98 in): Days with 25 mm or more rain24920083
50 mm (1.97 in): Days with 50 mm or more rain7220031

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1981.

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).