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Built 2026-10-19 (19 October 2026)

Copalillo Threshold Days by Year (MXN00012023)

13 fixed thresholds counted per year at Copalillo (MXN00012023): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Copalillo Thresholds

  • Copalillo: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1965 with 44.
  • Copalillo: days with 25 mm (0.98 in) or more of precipitation in 44 years, most in 1970 with 17.
  • Copalillo: nights with a minimum temperature at or above 20 C (68 F) in 40 years, most in 1990 with 306.
  • Copalillo: days with a maximum temperature at or above 30 C (86 F) in 39 years, most in 1986 with 363.
  • 13 fixed thresholds have at least one qualifying day at Copalillo.
39 years with a qualifying day
Days at or above 30 C (86 F) per year at Copalillo Days per year at Copalillo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 363 in 1986. 01002003004001964: 3301965: 3001966: 3201967: 3241968: 3131969: 3391970: 3221971: 2981972: 3131973: 3501974: 2401975: 1821976: 2941977: 3181978: 2531981: 2881982: 3341983: 2981986: 3631987: 3581988: 3291989: 3501990: 3621991: 3631994: 3571995: 3341997: 3521998: 3312001: 2792002: 2932003: 3182004: 2792005: 1972006: 1132007: 942008: 92010: 1482011: 1852012: 1541964196819721976198219881994200120052010
Days per year at Copalillo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 363 in 1986.
Days at or above 30 C (86 F) per year at Copalillo
YearDaysDecade average
1964330321
1965300321
1966320321
1967324321
1968313321
1969339321
1970322285.6
1971298285.6
1972313285.6
1973350285.6
1974240285.6
1975182285.6
1976294285.6
1977318285.6
1978253285.6
1981288331.4
1982334331.4
1983298331.4
1986363331.4
1987358331.4
1988329331.4
1989350331.4
1990362349.8
1991363349.8
1994357349.8
1995334349.8
1997352349.8
1998331349.8
2001279197.8
2002293197.8
2003318197.8
2004279197.8
2005197197.8
2006113197.8
200794197.8
20089197.8
2010148162.3
2011185162.3
2012154162.3
First to last qualifying date each year at Copalillo For each year, a bar from the first to the last day at Copalillo meeting 30 C (86 F). 1964: 10 January 1964 to 31 December 19641965: 1 January 1965 to 31 December 19651966: 1 January 1966 to 31 December 19661967: 1 January 1967 to 31 December 19671968: 1 January 1968 to 31 December 19681969: 1 January 1969 to 31 December 19691970: 2 January 1970 to 31 December 19701971: 1 January 1971 to 31 December 19711972: 1 January 1972 to 21 December 19721973: 2 January 1973 to 31 December 19731974: 1 January 1974 to 20 December 19741975: 5 January 1975 to 17 December 19751976: 3 January 1976 to 31 December 19761977: 1 January 1977 to 31 December 19771978: 5 January 1978 to 31 December 19781981: 7 January 1981 to 31 December 19811982: 1 January 1982 to 31 December 19821983: 3 January 1983 to 29 December 19831986: 1 January 1986 to 31 December 19861987: 1 January 1987 to 31 December 19871988: 1 January 1988 to 31 December 19881989: 1 January 1989 to 31 December 19891990: 1 January 1990 to 31 December 19901991: 1 January 1991 to 31 December 19911994: 1 January 1994 to 31 December 19941995: 1 January 1995 to 31 December 19951997: 1 January 1997 to 31 December 19971998: 1 January 1998 to 31 December 19982001: 5 January 2001 to 31 December 20012002: 5 January 2002 to 31 December 20022003: 1 January 2003 to 31 December 20032004: 1 January 2004 to 31 December 20042005: 9 January 2005 to 31 December 20052006: 5 January 2006 to 23 December 20062007: 5 January 2007 to 28 November 20072008: 9 January 2008 to 26 April 20082010: 20 January 2010 to 30 November 20102011: 2 January 2011 to 31 December 20112012: 12 January 2012 to 24 December 201219641969197419811988199520032008JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Copalillo meeting 30 C (86 F).
First to last qualifying date each year at Copalillo
YearFirst dateLast date
19641964-01-101964-12-31
19651965-01-011965-12-31
19661966-01-011966-12-31
19671967-01-011967-12-31
19681968-01-011968-12-31
19691969-01-011969-12-31
19701970-01-021970-12-31
19711971-01-011971-12-31
19721972-01-011972-12-21
19731973-01-021973-12-31
19741974-01-011974-12-20
19751975-01-051975-12-17
19761976-01-031976-12-31
19771977-01-011977-12-31
19781978-01-051978-12-31
19811981-01-071981-12-31
19821982-01-011982-12-31
19831983-01-031983-12-29
19861986-01-011986-12-31
19871987-01-011987-12-31
19881988-01-011988-12-31
19891989-01-011989-12-31
19901990-01-011990-12-31
19911991-01-011991-12-31
19941994-01-011994-12-31
19951995-01-011995-12-31
19971997-01-011997-12-31
19981998-01-011998-12-31
20012001-01-052001-12-31
20022002-01-052002-12-31
20032003-01-012003-12-31
20042004-01-012004-12-31
20052005-01-092005-12-31
20062006-01-052006-12-23
20072007-01-052007-11-28
20082008-01-092008-04-26
20102010-01-202010-11-30
20112011-01-022011-12-31
20122012-01-122012-12-24

Every Fixed Threshold

Fixed thresholds at Copalillo
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days393631986154
35 C (95 F): Days37327199433
40 C (104 F): Days1710519942
45 C (113 F): Days3919783
90 F (32.2 C): Days38347199478
100 F (37.8 C): Days36164199416
110 F (43.3 C): Days45119943
20 C (68 F): Tropical nights (min4030619907
25 C (77 F): Days with min152519871
10 mm (0.39 in): Days with 10 mm or more rain4544196528
25 mm (0.98 in): Days with 25 mm or more rain4417197010
50 mm (1.97 in): Days with 50 mm or more rain17319661
100 mm (3.94 in): Days with 100 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 1964.

Download the Data

  • Data for Copalillo 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).