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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Corona Threshold Days by Year (MXN00028020)

15 fixed thresholds counted per year at Corona (MXN00028020): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Corona Thresholds

  • Corona: days with a maximum temperature at or above 30 C (86 F) in 49 years, most in 1999 with 277.
  • Corona: days with a maximum temperature at or above 35 C (95 F) in 49 years, most in 2000 with 180.
  • Corona: days with a maximum temperature at or above 90 F (32.2 C) in 49 years, most in 1995 with 222.
  • Corona: days with a maximum temperature at or above 100 F (37.8 C) in 49 years, most in 1998 with 123.
  • 15 fixed thresholds have at least one qualifying day at Corona.
49 years with a qualifying day
Days at or above 30 C (86 F) per year at Corona Days per year at Corona with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 277 in 1999. 01002003001957: 2621958: 2041959: 2081961: 2311962: 2481963: 2281964: 2241965: 2041966: 1861967: 2021968: 2091969: 2101970: 1851971: 2251972: 2321973: 2111974: 2001975: 2071976: 1851977: 1951978: 2031979: 2011980: 2191981: 2331982: 2421983: 2401984: 2181986: 2401987: 2221988: 2351989: 2541990: 2251991: 2171992: 1981993: 2021994: 2271995: 2691996: 2681997: 2371998: 2701999: 2772000: 2732001: 2492002: 2312003: 2322004: 2472006: 2422008: 2392009: 2351957196319681973197819831989199419992004
Days per year at Corona with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 277 in 1999.
Days at or above 30 C (86 F) per year at Corona
YearDaysDecade average
1957262224.7
1958204224.7
1959208224.7
1961231215.8
1962248215.8
1963228215.8
1964224215.8
1965204215.8
1966186215.8
1967202215.8
1968209215.8
1969210215.8
1970185204.4
1971225204.4
1972232204.4
1973211204.4
1974200204.4
1975207204.4
1976185204.4
1977195204.4
1978203204.4
1979201204.4
1980219233.7
1981233233.7
1982242233.7
1983240233.7
1984218233.7
1986240233.7
1987222233.7
1988235233.7
1989254233.7
1990225239
1991217239
1992198239
1993202239
1994227239
1995269239
1996268239
1997237239
1998270239
1999277239
2000273243.5
2001249243.5
2002231243.5
2003232243.5
2004247243.5
2006242243.5
2008239243.5
2009235243.5
First to last qualifying date each year at Corona For each year, a bar from the first to the last day at Corona meeting 30 C (86 F). 1957: 1 January 1957 to 27 December 19571958: 30 January 1958 to 17 November 19581959: 9 February 1959 to 31 December 19591961: 12 February 1961 to 11 December 19611962: 14 January 1962 to 26 November 19621963: 10 January 1963 to 11 December 19631964: 17 February 1964 to 26 December 19641965: 2 January 1965 to 26 November 19651966: 9 February 1966 to 27 December 19661967: 10 February 1967 to 26 November 19671968: 21 February 1968 to 27 December 19681969: 21 January 1969 to 13 November 19691970: 3 March 1970 to 19 December 19701971: 3 January 1971 to 16 December 19711972: 21 January 1972 to 24 December 19721973: 4 January 1973 to 31 December 19731974: 2 February 1974 to 19 November 19741975: 26 January 1975 to 10 November 19751976: 1 January 1976 to 19 October 19761977: 23 February 1977 to 19 December 19771978: 16 January 1978 to 7 December 19781979: 15 February 1979 to 27 November 19791980: 15 February 1980 to 9 November 19801981: 10 February 1981 to 31 December 19811982: 1 January 1982 to 24 December 19821983: 29 January 1983 to 21 December 19831984: 11 February 1984 to 21 December 19841986: 5 February 1986 to 23 November 19861987: 4 February 1987 to 25 December 19871988: 17 January 1988 to 27 December 19881989: 2 January 1989 to 28 November 19891990: 11 January 1990 to 31 December 19901991: 27 January 1991 to 19 November 19911992: 15 February 1992 to 11 November 19921993: 23 January 1993 to 10 December 19931994: 6 January 1994 to 15 December 19941995: 6 January 1995 to 17 December 19951996: 1 January 1996 to 28 December 19961997: 1 January 1997 to 9 December 19971998: 4 January 1998 to 29 December 19981999: 1 January 1999 to 31 December 19992000: 2 January 2000 to 29 November 20002001: 28 January 2001 to 29 December 20012002: 9 February 2002 to 11 November 20022003: 21 January 2003 to 27 November 20032004: 26 January 2004 to 22 December 20042006: 12 January 2006 to 29 December 20062008: 7 January 2008 to 20 December 20082009: 8 January 2009 to 14 December 20091957196519721979198719942001JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Corona meeting 30 C (86 F).
First to last qualifying date each year at Corona
YearFirst dateLast date
19571957-01-011957-12-27
19581958-01-301958-11-17
19591959-02-091959-12-31
19611961-02-121961-12-11
19621962-01-141962-11-26
19631963-01-101963-12-11
19641964-02-171964-12-26
19651965-01-021965-11-26
19661966-02-091966-12-27
19671967-02-101967-11-26
19681968-02-211968-12-27
19691969-01-211969-11-13
19701970-03-031970-12-19
19711971-01-031971-12-16
19721972-01-211972-12-24
19731973-01-041973-12-31
19741974-02-021974-11-19
19751975-01-261975-11-10
19761976-01-011976-10-19
19771977-02-231977-12-19
19781978-01-161978-12-07
19791979-02-151979-11-27
19801980-02-151980-11-09
19811981-02-101981-12-31
19821982-01-011982-12-24
19831983-01-291983-12-21
19841984-02-111984-12-21
19861986-02-051986-11-23
19871987-02-041987-12-25
19881988-01-171988-12-27
19891989-01-021989-11-28
19901990-01-111990-12-31
19911991-01-271991-11-19
19921992-02-151992-11-11
19931993-01-231993-12-10
19941994-01-061994-12-15
19951995-01-061995-12-17
19961996-01-011996-12-28
19971997-01-011997-12-09
19981998-01-041998-12-29
19991999-01-011999-12-31
20002000-01-022000-11-29
20012001-01-282001-12-29
20022002-02-092002-11-11
20032003-01-212003-11-27
20042004-01-262004-12-22
20062006-01-122006-12-29
20082008-01-072008-12-20
20092009-01-082009-12-14

Every Fixed Threshold

Fixed thresholds at Corona
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days492771999235
35 C (95 F): Days491802000153
40 C (104 F): Days4473199853
45 C (113 F): Days5219982
90 F (32.2 C): Days492221995194
100 F (37.8 C): Days49123199898
110 F (43.3 C): Days14719982
0 C (32 F): Frost days (min35919632
20 C (68 F): Tropical nights (min492012000166
25 C (77 F): Days with min4766198038
10 mm (0.39 in): Days with 10 mm or more rain4933196913
25 mm (0.98 in): Days with 25 mm or more rain491619586
50 mm (1.97 in): Days with 50 mm or more rain45719723
100 mm (3.94 in): Days with 100 mm or more rain11119671
200 mm (7.87 in): Days with 200 mm or more rain1120091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

  • Data for Corona 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).