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

Simao Threshold Days by Year (CHM00056964)

9 fixed thresholds counted per year at Simao (CHM00056964): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Simao Thresholds

  • Simao: days with a maximum temperature at or above 30 C (86 F) in 69 years, most in 2020 with 94.
  • Simao: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 2001 with 71.
  • Simao: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1971 with 26.
  • Simao: nights with a minimum temperature at or above 20 C (68 F) in 66 years, most in 2010 with 92.
  • 9 fixed thresholds have at least one qualifying day at Simao.
69 years with a qualifying day
Days at or above 30 C (86 F) per year at Simao Days per year at Simao with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 94 in 2020. 02550751001951: 41952: 451953: 501954: 201955: 131956: 141957: 241958: 381959: 201960: 311961: 281962: 241963: 281964: 61965: 201966: 201967: 71968: 51969: 401970: 171971: 101972: 211973: 91974: 51975: 191976: 41977: 131978: 301979: 491980: 411981: 31982: 221983: 311984: 311985: 101986: 311987: 311988: 231989: 301990: 221991: 201992: 371993: 111994: 251995: 251996: 251997: 201998: 361999: 242000: 92001: 252002: 222003: 302004: 332005: 492006: 412007: 352008: 272009: 292010: 652011: 152012: 612014: 632020: 942021: 532022: 312023: 552024: 502025: 321951195819651972197919861993200020072020
Days per year at Simao with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 94 in 2020.
Days at or above 30 C (86 F) per year at Simao
YearDaysDecade average
1951425.3
19524525.3
19535025.3
19542025.3
19551325.3
19561425.3
19572425.3
19583825.3
19592025.3
19603120.9
19612820.9
19622420.9
19632820.9
1964620.9
19652020.9
19662020.9
1967720.9
1968520.9
19694020.9
19701717.7
19711017.7
19722117.7
1973917.7
1974517.7
19751917.7
1976417.7
19771317.7
19783017.7
19794917.7
19804125.3
1981325.3
19822225.3
19833125.3
19843125.3
19851025.3
19863125.3
19873125.3
19882325.3
19893025.3
19902224.5
19912024.5
19923724.5
19931124.5
19942524.5
19952524.5
19962524.5
19972024.5
19983624.5
19992424.5
2000930
20012530
20022230
20033030
20043330
20054930
20064130
20073530
20082730
20092930
20106551
20111551
20126151
20146351
20209452.5
20215352.5
20223152.5
20235552.5
20245052.5
20253252.5
First to last qualifying date each year at Simao For each year, a bar from the first to the last day at Simao meeting 30 C (86 F). 1951: 8 May 1951 to 16 May 19511952: 30 March 1952 to 6 July 19521953: 14 March 1953 to 28 August 19531954: 13 April 1954 to 14 May 19541955: 22 March 1955 to 11 May 19551956: 9 April 1956 to 30 April 19561957: 10 April 1957 to 12 September 19571958: 24 March 1958 to 12 September 19581959: 5 April 1959 to 15 July 19591960: 22 March 1960 to 27 September 19601961: 8 April 1961 to 25 July 19611962: 2 April 1962 to 17 September 19621963: 26 March 1963 to 16 September 19631964: 7 April 1964 to 8 August 19641965: 17 April 1965 to 25 May 19651966: 29 March 1966 to 14 May 19661967: 4 April 1967 to 23 June 19671968: 7 May 1968 to 25 July 19681969: 28 March 1969 to 26 June 19691970: 31 March 1970 to 14 May 19701971: 24 April 1971 to 7 July 19711972: 21 April 1972 to 28 August 19721973: 3 April 1973 to 21 July 19731974: 20 April 1974 to 9 May 19741975: 25 March 1975 to 3 May 19751976: 2 April 1976 to 17 June 19761977: 16 April 1977 to 18 June 19771978: 5 April 1978 to 3 October 19781979: 8 March 1979 to 10 August 19791980: 12 March 1980 to 2 July 19801981: 10 May 1981 to 10 August 19811982: 24 March 1982 to 31 August 19821983: 16 April 1983 to 25 September 19831984: 20 March 1984 to 8 August 19841985: 25 March 1985 to 15 May 19851986: 24 March 1986 to 11 August 19861987: 5 April 1987 to 27 June 19871988: 19 March 1988 to 20 July 19881989: 27 March 1989 to 12 August 19891990: 15 April 1990 to 29 August 19901991: 22 March 1991 to 26 May 19911992: 23 March 1992 to 7 September 19921993: 2 April 1993 to 27 July 19931994: 9 April 1994 to 6 July 19941995: 23 March 1995 to 31 May 19951996: 8 April 1996 to 9 September 19961997: 5 May 1997 to 23 August 19971998: 17 March 1998 to 16 June 19981999: 19 March 1999 to 6 June 19992000: 8 April 2000 to 24 August 20002001: 5 April 2001 to 9 August 20012002: 28 March 2002 to 7 July 20022003: 4 April 2003 to 25 August 20032004: 10 March 2004 to 26 August 20042005: 31 March 2005 to 1 September 20052006: 11 March 2006 to 30 September 20062007: 27 March 2007 to 21 August 20072008: 5 April 2008 to 24 September 20082009: 23 March 2009 to 11 September 20092010: 21 March 2010 to 21 September 20102011: 22 April 2011 to 3 September 20112012: 12 March 2012 to 23 September 20122014: 16 March 2014 to 15 September 20142020: 13 March 2020 to 18 September 20202021: 18 March 2021 to 14 September 20212022: 12 March 2022 to 31 August 20222023: 7 April 2023 to 19 July 20232024: 31 March 2024 to 19 July 20242025: 31 March 2025 to 20 August 202519511960196919781987199620052020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Simao meeting 30 C (86 F).
First to last qualifying date each year at Simao
YearFirst dateLast date
19511951-05-081951-05-16
19521952-03-301952-07-06
19531953-03-141953-08-28
19541954-04-131954-05-14
19551955-03-221955-05-11
19561956-04-091956-04-30
19571957-04-101957-09-12
19581958-03-241958-09-12
19591959-04-051959-07-15
19601960-03-221960-09-27
19611961-04-081961-07-25
19621962-04-021962-09-17
19631963-03-261963-09-16
19641964-04-071964-08-08
19651965-04-171965-05-25
19661966-03-291966-05-14
19671967-04-041967-06-23
19681968-05-071968-07-25
19691969-03-281969-06-26
19701970-03-311970-05-14
19711971-04-241971-07-07
19721972-04-211972-08-28
19731973-04-031973-07-21
19741974-04-201974-05-09
19751975-03-251975-05-03
19761976-04-021976-06-17
19771977-04-161977-06-18
19781978-04-051978-10-03
19791979-03-081979-08-10
19801980-03-121980-07-02
19811981-05-101981-08-10
19821982-03-241982-08-31
19831983-04-161983-09-25
19841984-03-201984-08-08
19851985-03-251985-05-15
19861986-03-241986-08-11
19871987-04-051987-06-27
19881988-03-191988-07-20
19891989-03-271989-08-12
19901990-04-151990-08-29
19911991-03-221991-05-26
19921992-03-231992-09-07
19931993-04-021993-07-27
19941994-04-091994-07-06
19951995-03-231995-05-31
19961996-04-081996-09-09
19971997-05-051997-08-23
19981998-03-171998-06-16
19991999-03-191999-06-06
20002000-04-082000-08-24
20012001-04-052001-08-09
20022002-03-282002-07-07
20032003-04-042003-08-25
20042004-03-102004-08-26
20052005-03-312005-09-01
20062006-03-112006-09-30
20072007-03-272007-08-21
20082008-04-052008-09-24
20092009-03-232009-09-11
20102010-03-212010-09-21
20112011-04-222011-09-03
20122012-03-122012-09-23
20142014-03-162014-09-15
20202020-03-132020-09-18
20212021-03-182021-09-14
20222022-03-122022-08-31
20232023-04-072023-07-19
20242024-03-312024-07-19
20252025-03-312025-08-20

Every Fixed Threshold

Fixed thresholds at Simao
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days6994202032
35 C (95 F): Days1119791
90 F (32.2 C): Days503420204
0 C (32 F): Frost days (min121419512
20 C (68 F): Tropical nights (min669220107
10 mm (0.39 in): Days with 10 mm or more rain6871200138
25 mm (0.98 in): Days with 25 mm or more rain6826197113
50 mm (1.97 in): Days with 50 mm or more rain65719773
100 mm (3.94 in): Days with 100 mm or more rain15219982

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 Simao 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).