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Built 2026-10-19 (19 October 2026)

Altotonga Threshold Days by Year (MXN00030008)

10 fixed thresholds counted per year at Altotonga (MXN00030008): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Altotonga Thresholds

  • Altotonga: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1993 with 69.
  • Altotonga: days with 25 mm (0.98 in) or more of precipitation in 51 years, most in 1929 with 31.
  • Altotonga: days with 50 mm (1.97 in) or more of precipitation in 40 years, most in 1929 with 11.
  • Altotonga: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1968 with 28.
  • 10 fixed thresholds have at least one qualifying day at Altotonga.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Altotonga Days per year at Altotonga with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 1988. 0102030401927: 11928: 41929: 31930: 41960: 31962: 11964: 61967: 11968: 11969: 51970: 81971: 201972: 21973: 101974: 11975: 11977: 41978: 31982: 11983: 161984: 171988: 381989: 11990: 151991: 32006: 12007: 12008: 12009: 42010: 52011: 3419271960196819721977198419912009
Days per year at Altotonga with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 1988.
Days at or above 30 C (86 F) per year at Altotonga
YearDaysDecade average
192712.7
192842.7
192932.7
193044
196032.8
196212.8
196462.8
196712.8
196812.8
196952.8
197086.1
1971206.1
197226.1
1973106.1
197416.1
197516.1
197746.1
197836.1
1982114.6
19831614.6
19841714.6
19883814.6
1989114.6
1990159
199139
200611.8
200711.8
200811.8
200941.8
2010519.5
20113419.5
First to last qualifying date each year at Altotonga For each year, a bar from the first to the last day at Altotonga meeting 30 C (86 F). 1927: 9 May 1927 to 9 May 19271928: 20 April 1928 to 1 May 19281929: 21 April 1929 to 2 May 19291930: 19 March 1930 to 8 May 19301960: 1 April 1960 to 18 May 19601962: 23 December 1962 to 23 December 19621964: 3 May 1964 to 12 May 19641967: 28 May 1967 to 28 May 19671968: 30 March 1968 to 30 March 19681969: 23 March 1969 to 7 May 19691970: 31 March 1970 to 25 October 19701971: 3 January 1971 to 30 April 19711972: 9 April 1972 to 14 April 19721973: 10 March 1973 to 14 June 19731974: 24 March 1974 to 24 March 19741975: 10 April 1975 to 10 April 19751977: 18 March 1977 to 21 March 19771978: 13 March 1978 to 6 May 19781982: 3 April 1982 to 3 April 19821983: 22 April 1983 to 30 May 19831984: 1 April 1984 to 5 May 19841988: 8 January 1988 to 30 December 19881989: 21 May 1989 to 21 May 19891990: 7 March 1990 to 10 December 19901991: 27 January 1991 to 27 May 19912006: 8 May 2006 to 8 May 20062007: 1 March 2007 to 1 March 20072008: 14 June 2008 to 14 June 20082009: 27 March 2009 to 29 June 20092010: 7 April 2010 to 1 July 20102011: 29 March 2011 to 24 July 201119271960196819721977198419912009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Altotonga meeting 30 C (86 F).
First to last qualifying date each year at Altotonga
YearFirst dateLast date
19271927-05-091927-05-09
19281928-04-201928-05-01
19291929-04-211929-05-02
19301930-03-191930-05-08
19601960-04-011960-05-18
19621962-12-231962-12-23
19641964-05-031964-05-12
19671967-05-281967-05-28
19681968-03-301968-03-30
19691969-03-231969-05-07
19701970-03-311970-10-25
19711971-01-031971-04-30
19721972-04-091972-04-14
19731973-03-101973-06-14
19741974-03-241974-03-24
19751975-04-101975-04-10
19771977-03-181977-03-21
19781978-03-131978-05-06
19821982-04-031982-04-03
19831983-04-221983-05-30
19841984-04-011984-05-05
19881988-01-081988-12-30
19891989-05-211989-05-21
19901990-03-071990-12-10
19911991-01-271991-05-27
20062006-05-082006-05-08
20072007-03-012007-03-01
20082008-06-142008-06-14
20092009-03-272009-06-29
20102010-04-072010-07-01
20112011-03-292011-07-24

Every Fixed Threshold

Fixed thresholds at Altotonga
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3138198834
35 C (95 F): Days1120111
90 F (32.2 C): Days4920119
0 C (32 F): Frost days (min342819687
20 C (68 F): Tropical nights (min7219291
10 mm (0.39 in): Days with 10 mm or more rain5169199351
25 mm (0.98 in): Days with 25 mm or more rain5131192921
50 mm (1.97 in): Days with 50 mm or more rain401119296
100 mm (3.94 in): Days with 100 mm or more rain21420101
200 mm (7.87 in): Days with 200 mm or more rain2119741

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1927.

Download the Data

  • Data for Altotonga 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).