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Built 2026-10-19 (19 October 2026)

Chapalacana Threshold Days by Year (MXN00018063)

13 fixed thresholds counted per year at Chapalacana (MXN00018063): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chapalacana Thresholds

  • Chapalacana: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1997 with 34.
  • Chapalacana: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1997 with 11.
  • Chapalacana: days with a maximum temperature at or above 30 C (86 F) in 21 years, most in 2000 with 360.
  • Chapalacana: days with a maximum temperature at or above 35 C (95 F) in 21 years, most in 1989 with 305.
  • 13 fixed thresholds have at least one qualifying day at Chapalacana.
21 years with a qualifying day
Days at or above 30 C (86 F) per year at Chapalacana Days per year at Chapalacana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 360 in 2000. 01002003004001978: 3591980: 3181981: 3491982: 3081983: 3241986: 3431987: 3311988: 3511989: 3561990: 3451993: 3561994: 3511995: 3411996: 3421997: 3391998: 3421999: 3592000: 3602001: 3152005: 3482006: 3311978198219871990199519982001
Days per year at Chapalacana with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 360 in 2000.
Days at or above 30 C (86 F) per year at Chapalacana
YearDaysDecade average
1978359359
1980318335
1981349335
1982308335
1983324335
1986343335
1987331335
1988351335
1989356335
1990345346.9
1993356346.9
1994351346.9
1995341346.9
1996342346.9
1997339346.9
1998342346.9
1999359346.9
2000360338.5
2001315338.5
2005348338.5
2006331338.5
First to last qualifying date each year at Chapalacana For each year, a bar from the first to the last day at Chapalacana meeting 30 C (86 F). 1978: 1 January 1978 to 31 December 19781980: 1 January 1980 to 31 December 19801981: 1 January 1981 to 31 December 19811982: 1 January 1982 to 19 December 19821983: 6 January 1983 to 31 December 19831986: 1 January 1986 to 31 December 19861987: 7 January 1987 to 27 December 19871988: 1 January 1988 to 31 December 19881989: 1 January 1989 to 31 December 19891990: 1 January 1990 to 31 December 19901993: 1 January 1993 to 30 December 19931994: 1 January 1994 to 31 December 19941995: 1 January 1995 to 20 December 19951996: 1 January 1996 to 31 December 19961997: 1 January 1997 to 30 December 19971998: 1 January 1998 to 30 December 19981999: 1 January 1999 to 31 December 19992000: 1 January 2000 to 25 December 20002001: 5 January 2001 to 29 December 20012005: 2 January 2005 to 31 December 20052006: 1 January 2006 to 31 December 20061978198219871990199519982001JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chapalacana meeting 30 C (86 F).
First to last qualifying date each year at Chapalacana
YearFirst dateLast date
19781978-01-011978-12-31
19801980-01-011980-12-31
19811981-01-011981-12-31
19821982-01-011982-12-19
19831983-01-061983-12-31
19861986-01-011986-12-31
19871987-01-071987-12-27
19881988-01-011988-12-31
19891989-01-011989-12-31
19901990-01-011990-12-31
19931993-01-011993-12-30
19941994-01-011994-12-31
19951995-01-011995-12-20
19961996-01-011996-12-31
19971997-01-011997-12-30
19981998-01-011998-12-30
19991999-01-011999-12-31
20002000-01-012000-12-25
20012001-01-052001-12-29
20052005-01-022005-12-31
20062006-01-012006-12-31

Every Fixed Threshold

Fixed thresholds at Chapalacana
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days213602000331
35 C (95 F): Days213051989280
40 C (104 F): Days2186198984
45 C (113 F): Days5219801
90 F (32.2 C): Days213471989319
100 F (37.8 C): Days211702006170
110 F (43.3 C): Days131219897
20 C (68 F): Tropical nights (min212071981161
25 C (77 F): Days with min2144198213
10 mm (0.39 in): Days with 10 mm or more rain2334199716
25 mm (0.98 in): Days with 25 mm or more rain231119974
50 mm (1.97 in): Days with 50 mm or more rain18519871
100 mm (3.94 in): Days with 100 mm or more rain1119871

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1978.

Download the Data

  • Data for Chapalacana 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).