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Built 2026-10-19 (19 October 2026)

Calkini (Smn) Threshold Days by Year (MXN00004002)

13 fixed thresholds counted per year at Calkini (Smn) (MXN00004002): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Calkini (Smn) Thresholds

  • Calkini (Smn): days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 1971 with 356.
  • Calkini (Smn): days with a maximum temperature at or above 90 F (32.2 C) in 36 years, most in 1971 with 342.
  • Calkini (Smn): nights with a minimum temperature at or above 20 C (68 F) in 36 years, most in 1960 with 321.
  • Calkini (Smn): days with a maximum temperature at or above 35 C (95 F) in 35 years, most in 1971 with 300.
  • 13 fixed thresholds have at least one qualifying day at Calkini (Smn).
36 years with a qualifying day
Days at or above 30 C (86 F) per year at Calkini (Smn) Days per year at Calkini (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 356 in 1971. 01002003004001951: 3351952: 3261953: 2941954: 3161955: 3121956: 3311957: 3391958: 3141959: 2121960: 1461961: 3061962: 3431963: 3291964: 3461965: 3351966: 3421967: 3051968: 2791969: 3051970: 3301971: 3561975: 3151985: 3231986: 3311987: 3351988: 2791991: 2851992: 2761993: 3291994: 3291995: 3461996: 1761997: 1131998: 1851999: 1222001: 294195119551959196319671971198719931997
Days per year at Calkini (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 356 in 1971.
Days at or above 30 C (86 F) per year at Calkini (Smn)
YearDaysDecade average
1951335308.8
1952326308.8
1953294308.8
1954316308.8
1955312308.8
1956331308.8
1957339308.8
1958314308.8
1959212308.8
1960146303.6
1961306303.6
1962343303.6
1963329303.6
1964346303.6
1965335303.6
1966342303.6
1967305303.6
1968279303.6
1969305303.6
1970330333.7
1971356333.7
1975315333.7
1985323317
1986331317
1987335317
1988279317
1991285240.1
1992276240.1
1993329240.1
1994329240.1
1995346240.1
1996176240.1
1997113240.1
1998185240.1
1999122240.1
2001294294
First to last qualifying date each year at Calkini (Smn) For each year, a bar from the first to the last day at Calkini (Smn) meeting 30 C (86 F). 1951: 1 January 1951 to 30 December 19511952: 1 January 1952 to 31 December 19521953: 1 January 1953 to 31 December 19531954: 1 January 1954 to 31 December 19541955: 1 January 1955 to 25 December 19551956: 16 January 1956 to 31 December 19561957: 1 January 1957 to 31 December 19571958: 6 January 1958 to 14 December 19581959: 7 February 1959 to 18 November 19591960: 9 February 1960 to 17 October 19601961: 25 January 1961 to 27 December 19611962: 5 January 1962 to 31 December 19621963: 1 January 1963 to 21 December 19631964: 4 January 1964 to 31 December 19641965: 1 January 1965 to 31 December 19651966: 1 January 1966 to 31 December 19661967: 1 January 1967 to 18 December 19671968: 25 January 1968 to 31 December 19681969: 1 January 1969 to 31 December 19691970: 1 January 1970 to 31 December 19701971: 1 January 1971 to 30 December 19711975: 1 January 1975 to 31 December 19751985: 1 January 1985 to 31 December 19851986: 1 January 1986 to 31 December 19861987: 3 January 1987 to 31 December 19871988: 1 January 1988 to 31 December 19881991: 1 January 1991 to 19 December 19911992: 6 January 1992 to 31 December 19921993: 3 January 1993 to 31 December 19931994: 2 January 1994 to 31 December 19941995: 1 January 1995 to 31 December 19951996: 1 January 1996 to 11 December 19961997: 1 February 1997 to 1 December 19971998: 7 January 1998 to 9 October 19981999: 1 March 1999 to 7 December 19992001: 7 January 2001 to 31 December 200119511956196119661971198819952001JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Calkini (Smn) meeting 30 C (86 F).
First to last qualifying date each year at Calkini (Smn)
YearFirst dateLast date
19511951-01-011951-12-30
19521952-01-011952-12-31
19531953-01-011953-12-31
19541954-01-011954-12-31
19551955-01-011955-12-25
19561956-01-161956-12-31
19571957-01-011957-12-31
19581958-01-061958-12-14
19591959-02-071959-11-18
19601960-02-091960-10-17
19611961-01-251961-12-27
19621962-01-051962-12-31
19631963-01-011963-12-21
19641964-01-041964-12-31
19651965-01-011965-12-31
19661966-01-011966-12-31
19671967-01-011967-12-18
19681968-01-251968-12-31
19691969-01-011969-12-31
19701970-01-011970-12-31
19711971-01-011971-12-30
19751975-01-011975-12-31
19851985-01-011985-12-31
19861986-01-011986-12-31
19871987-01-031987-12-31
19881988-01-011988-12-31
19911991-01-011991-12-19
19921992-01-061992-12-31
19931993-01-031993-12-31
19941994-01-021994-12-31
19951995-01-011995-12-31
19961996-01-011996-12-11
19971997-02-011997-12-01
19981998-01-071998-10-09
19991999-03-011999-12-07
20012001-01-072001-12-31

Every Fixed Threshold

Fixed thresholds at Calkini (Smn)
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days363561971294
35 C (95 F): Days353001971109
40 C (104 F): Days307719651
45 C (113 F): Days5619645
90 F (32.2 C): Days363421971190
100 F (37.8 C): Days34143196316
110 F (43.3 C): Days1216196412
20 C (68 F): Tropical nights (min363211960171
25 C (77 F): Days with min3025519598
10 mm (0.39 in): Days with 10 mm or more rain2956199352
25 mm (0.98 in): Days with 25 mm or more rain2921199721
50 mm (1.97 in): Days with 50 mm or more rain29819661
100 mm (3.94 in): Days with 100 mm or more rain6319662

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

  • Data for Calkini (Smn) 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).