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 (MXN00028194)

15 fixed thresholds counted per year at San Isidro (MXN00028194): 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 23 years, most in 2005 with 268.
  • San Isidro: days with a maximum temperature at or above 35 C (95 F) in 23 years, most in 2006 with 195.
  • San Isidro: days with a maximum temperature at or above 90 F (32.2 C) in 23 years, most in 2006 with 207.
  • San Isidro: days with a maximum temperature at or above 100 F (37.8 C) in 23 years, most in 2006 with 158.
  • 15 fixed thresholds have at least one qualifying day at San Isidro.
23 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 268 in 2005. 01002003001981: 2221982: 2301983: 2361987: 2401988: 2471990: 2381991: 2441992: 1961993: 2101994: 2141995: 2201996: 2341997: 2011999: 2212000: 2162001: 2102002: 2202004: 2512005: 2682006: 2572007: 2462008: 2492009: 21919811987199119941997200120052008
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 268 in 2005.
Days at or above 30 C (86 F) per year at San Isidro
YearDaysDecade average
1981222235
1982230235
1983236235
1987240235
1988247235
1990238219.8
1991244219.8
1992196219.8
1993210219.8
1994214219.8
1995220219.8
1996234219.8
1997201219.8
1999221219.8
2000216237.3
2001210237.3
2002220237.3
2004251237.3
2005268237.3
2006257237.3
2007246237.3
2008249237.3
2009219237.3
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: 10 February 1981 to 28 December 19811982: 2 January 1982 to 25 December 19821983: 31 January 1983 to 29 December 19831987: 1 February 1987 to 19 December 19871988: 17 January 1988 to 29 December 19881990: 18 January 1990 to 27 December 19901991: 14 January 1991 to 14 December 19911992: 12 February 1992 to 29 December 19921993: 2 January 1993 to 12 December 19931994: 6 March 1994 to 15 December 19941995: 1 January 1995 to 1 November 19951996: 1 January 1996 to 30 December 19961997: 2 January 1997 to 9 December 19971999: 7 January 1999 to 13 October 19992000: 1 March 2000 to 7 November 20002001: 8 February 2001 to 24 December 20012002: 17 January 2002 to 24 October 20022004: 1 March 2004 to 30 December 20042005: 3 January 2005 to 31 December 20052006: 1 January 2006 to 20 December 20062007: 13 January 2007 to 13 December 20072008: 22 January 2008 to 25 December 20082009: 13 January 2009 to 22 November 200919811987199119941997200120052008JanFebMarAprMayJunJulAugSepOctNovDec
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
19811981-02-101981-12-28
19821982-01-021982-12-25
19831983-01-311983-12-29
19871987-02-011987-12-19
19881988-01-171988-12-29
19901990-01-181990-12-27
19911991-01-141991-12-14
19921992-02-121992-12-29
19931993-01-021993-12-12
19941994-03-061994-12-15
19951995-01-011995-11-01
19961996-01-011996-12-30
19971997-01-021997-12-09
19991999-01-071999-10-13
20002000-03-012000-11-07
20012001-02-082001-12-24
20022002-01-172002-10-24
20042004-03-012004-12-30
20052005-01-032005-12-31
20062006-01-012006-12-20
20072007-01-132007-12-13
20082008-01-222008-12-25
20092009-01-132009-11-22

Every Fixed Threshold

Fixed thresholds at San Isidro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days232682005219
35 C (95 F): Days231952006167
40 C (104 F): Days22116200675
45 C (113 F): Days91020062
90 F (32.2 C): Days232072006177
100 F (37.8 C): Days231582006140
110 F (43.3 C): Days101220065
0 C (32 F): Frost days (min13920061
20 C (68 F): Tropical nights (min23170199457
25 C (77 F): Days with min112319811
10 mm (0.39 in): Days with 10 mm or more rain2342199719
25 mm (0.98 in): Days with 25 mm or more rain2317200810
50 mm (1.97 in): Days with 50 mm or more rain211220082
100 mm (3.94 in): Days with 100 mm or more rain7220041
200 mm (7.87 in): Days with 200 mm or more rain1120041

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).