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Built 2026-10-19 (19 October 2026)

Atotonilco El Alto Threshold Days by Year (MXN00014017)

10 fixed thresholds counted per year at Atotonilco El Alto (MXN00014017): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Atotonilco El Alto Thresholds

  • Atotonilco El Alto: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 1983 with 60.
  • Atotonilco El Alto: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1971 with 20.
  • Atotonilco El Alto: days with a maximum temperature at or above 30 C (86 F) in 41 years, most in 1948 with 246.
  • Atotonilco El Alto: days with a maximum temperature at or above 90 F (32.2 C) in 41 years, most in 1945 with 95.
  • 10 fixed thresholds have at least one qualifying day at Atotonilco El Alto.
41 years with a qualifying day
Days at or above 30 C (86 F) per year at Atotonilco El Alto Days per year at Atotonilco El Alto with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 246 in 1948. 01002003001943: 1641944: 1621945: 1601946: 1181947: 1911948: 2461964: 991965: 1191966: 681967: 1131968: 801969: 1031970: 681971: 681972: 881973: 851974: 841975: 821976: 911977: 1091978: 1191979: 1351980: 1181981: 1151982: 1441983: 1351987: 1081989: 1121995: 821996: 591998: 871999: 912000: 1072003: 1072004: 1162005: 1622006: 1642007: 1372009: 1792010: 1612011: 173194319481968197319781983199820052011
Days per year at Atotonilco El Alto with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 246 in 1948.
Days at or above 30 C (86 F) per year at Atotonilco El Alto
YearDaysDecade average
1943164173.5
1944162173.5
1945160173.5
1946118173.5
1947191173.5
1948246173.5
19649997
196511997
19666897
196711397
19688097
196910397
19706892.9
19716892.9
19728892.9
19738592.9
19748492.9
19758292.9
19769192.9
197710992.9
197811992.9
197913592.9
1980118122
1981115122
1982144122
1983135122
1987108122
1989112122
19958279.8
19965979.8
19988779.8
19999179.8
2000107138.9
2003107138.9
2004116138.9
2005162138.9
2006164138.9
2007137138.9
2009179138.9
2010161167
2011173167
First to last qualifying date each year at Atotonilco El Alto For each year, a bar from the first to the last day at Atotonilco El Alto meeting 30 C (86 F). 1943: 2 February 1943 to 7 November 19431944: 19 February 1944 to 16 December 19441945: 27 January 1945 to 25 December 19451946: 7 January 1946 to 1 November 19461947: 3 January 1947 to 8 November 19471948: 5 February 1948 to 31 December 19481964: 13 February 1964 to 30 August 19641965: 1 March 1965 to 26 November 19651966: 2 March 1966 to 2 October 19661967: 12 February 1967 to 1 August 19671968: 26 March 1968 to 7 October 19681969: 13 January 1969 to 19 November 19691970: 31 March 1970 to 22 November 19701971: 26 January 1971 to 20 November 19711972: 21 February 1972 to 10 December 19721973: 4 February 1973 to 4 November 19731974: 3 March 1974 to 15 October 19741975: 6 March 1975 to 10 November 19751976: 10 February 1976 to 13 September 19761977: 24 February 1977 to 27 December 19771978: 1 January 1978 to 23 November 19781979: 24 February 1979 to 5 November 19791980: 15 February 1980 to 25 October 19801981: 22 March 1981 to 24 November 19811982: 19 January 1982 to 30 October 19821983: 18 February 1983 to 9 October 19831987: 18 March 1987 to 4 November 19871989: 28 February 1989 to 21 November 19891995: 1 March 1995 to 3 November 19951996: 21 February 1996 to 23 November 19961998: 23 February 1998 to 31 October 19981999: 2 February 1999 to 5 November 19992000: 12 February 2000 to 16 December 20002003: 10 February 2003 to 31 October 20032004: 3 March 2004 to 24 October 20042005: 8 February 2005 to 13 December 20052006: 4 February 2006 to 2 November 20062007: 22 February 2007 to 21 December 20072009: 15 February 2009 to 7 September 20092010: 7 March 2010 to 23 November 20102011: 15 February 2011 to 21 November 20111943196419701976198219982006JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Atotonilco El Alto meeting 30 C (86 F).
First to last qualifying date each year at Atotonilco El Alto
YearFirst dateLast date
19431943-02-021943-11-07
19441944-02-191944-12-16
19451945-01-271945-12-25
19461946-01-071946-11-01
19471947-01-031947-11-08
19481948-02-051948-12-31
19641964-02-131964-08-30
19651965-03-011965-11-26
19661966-03-021966-10-02
19671967-02-121967-08-01
19681968-03-261968-10-07
19691969-01-131969-11-19
19701970-03-311970-11-22
19711971-01-261971-11-20
19721972-02-211972-12-10
19731973-02-041973-11-04
19741974-03-031974-10-15
19751975-03-061975-11-10
19761976-02-101976-09-13
19771977-02-241977-12-27
19781978-01-011978-11-23
19791979-02-241979-11-05
19801980-02-151980-10-25
19811981-03-221981-11-24
19821982-01-191982-10-30
19831983-02-181983-10-09
19871987-03-181987-11-04
19891989-02-281989-11-21
19951995-03-011995-11-03
19961996-02-211996-11-23
19981998-02-231998-10-31
19991999-02-021999-11-05
20002000-02-122000-12-16
20032003-02-102003-10-31
20042004-03-032004-10-24
20052005-02-082005-12-13
20062006-02-042006-11-02
20072007-02-222007-12-21
20092009-02-152009-09-07
20102010-03-072010-11-23
20112011-02-152011-11-21

Every Fixed Threshold

Fixed thresholds at Atotonilco El Alto
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days412461948173
35 C (95 F): Days3857196930
90 F (32.2 C): Days4195194579
100 F (37.8 C): Days10519452
0 C (32 F): Frost days (min5319991
20 C (68 F): Tropical nights (min3219801
10 mm (0.39 in): Days with 10 mm or more rain5660198326
25 mm (0.98 in): Days with 25 mm or more rain562019715
50 mm (1.97 in): Days with 50 mm or more rain34419672
100 mm (3.94 in): Days with 100 mm or more rain2119521

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

Download the Data

  • Data for Atotonilco El Alto 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).