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Built 2026-10-19 (19 October 2026)

Harlingen Threshold Days by Year (USC00413943)

15 fixed thresholds counted per year at Harlingen (USC00413943): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Harlingen Thresholds

  • Harlingen: days with 10 mm (0.39 in) or more of precipitation in 103 years, most in 1973 with 36.
  • Harlingen: days with 25 mm (0.98 in) or more of precipitation in 103 years, most in 1935 with 16.
  • Harlingen: days with a maximum temperature at or above 30 C (86 F) in 101 years, most in 1945 with 232.
  • Harlingen: days with a maximum temperature at or above 35 C (95 F) in 101 years, most in 2023 with 123.
  • 15 fixed thresholds have at least one qualifying day at Harlingen.
101 years with a qualifying day
Days at or above 30 C (86 F) per year at Harlingen Days per year at Harlingen with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 232 in 1945. 01002003001913: 1761914: 1761915: 1931920: 1921921: 2221922: 2021923: 1751924: 2011925: 2031926: 1921927: 2281928: 1861929: 2181930: 1871931: 1891932: 2111933: 2151934: 2211935: 2271936: 1801937: 2051938: 2101939: 2011940: 2111941: 1681942: 2101943: 2101944: 1911945: 2321946: 2201947: 2161948: 2111949: 1991950: 2261951: 2021952: 1881953: 2061954: 2091955: 2221956: 2131957: 2181958: 1771959: 1951960: 1961961: 2011962: 2061963: 2001964: 2011965: 1981966: 1821967: 1801968: 1821969: 1951970: 1611973: 1731974: 1921975: 1611976: 1231977: 1771978: 1851979: 1701980: 1761981: 1901982: 1931983: 1581984: 1881985: 2021986: 1941988: 1951989: 1841990: 1641992: 1351993: 1461995: 1861996: 1961997: 1631998: 1731999: 1952000: 2042001: 1832002: 2032003: 1852004: 1812005: 2112006: 2202007: 1892008: 1672009: 1942010: 1782011: 2172012: 2202013: 1822014: 1712015: 1782016: 2202020: 2192021: 2132022: 2152023: 2172025: 2072026: 1881913192819391950196119741985199920102025
Days per year at Harlingen with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 232 in 1945.
Days at or above 30 C (86 F) per year at Harlingen
YearDaysDecade average
1913176181.7
1914176181.7
1915193181.7
1920192201.9
1921222201.9
1922202201.9
1923175201.9
1924201201.9
1925203201.9
1926192201.9
1927228201.9
1928186201.9
1929218201.9
1930187204.6
1931189204.6
1932211204.6
1933215204.6
1934221204.6
1935227204.6
1936180204.6
1937205204.6
1938210204.6
1939201204.6
1940211206.8
1941168206.8
1942210206.8
1943210206.8
1944191206.8
1945232206.8
1946220206.8
1947216206.8
1948211206.8
1949199206.8
1950226205.6
1951202205.6
1952188205.6
1953206205.6
1954209205.6
1955222205.6
1956213205.6
1957218205.6
1958177205.6
1959195205.6
1960196194.1
1961201194.1
1962206194.1
1963200194.1
1964201194.1
1965198194.1
1966182194.1
1967180194.1
1968182194.1
1969195194.1
1970161167.8
1973173167.8
1974192167.8
1975161167.8
1976123167.8
1977177167.8
1978185167.8
1979170167.8
1980176186.7
1981190186.7
1982193186.7
1983158186.7
1984188186.7
1985202186.7
1986194186.7
1988195186.7
1989184186.7
1990164169.8
1992135169.8
1993146169.8
1995186169.8
1996196169.8
1997163169.8
1998173169.8
1999195169.8
2000204193.7
2001183193.7
2002203193.7
2003185193.7
2004181193.7
2005211193.7
2006220193.7
2007189193.7
2008167193.7
2009194193.7
2010178195.1
2011217195.1
2012220195.1
2013182195.1
2014171195.1
2015178195.1
2016220195.1
2020219209.8
2021213209.8
2022215209.8
2023217209.8
2025207209.8
2026188209.8
First to last qualifying date each year at Harlingen For each year, a bar from the first to the last day at Harlingen meeting 30 C (86 F). 1913: 20 February 1913 to 3 December 19131914: 9 January 1914 to 8 November 19141915: 22 April 1915 to 25 November 19151920: 23 February 1920 to 21 December 19201921: 5 February 1921 to 31 December 19211922: 18 January 1922 to 14 December 19221923: 8 January 1923 to 17 October 19231924: 3 February 1924 to 8 December 19241925: 10 February 1925 to 3 December 19251926: 12 February 1926 to 28 November 19261927: 30 January 1927 to 13 December 19271928: 13 January 1928 to 18 November 19281929: 20 January 1929 to 17 November 19291930: 13 February 1930 to 20 November 19301931: 22 March 1931 to 12 December 19311932: 17 January 1932 to 7 November 19321933: 25 January 1933 to 25 December 19331934: 25 February 1934 to 31 December 19341935: 7 January 1935 to 11 November 19351936: 3 February 1936 to 3 December 19361937: 8 February 1937 to 26 November 19371938: 18 January 1938 to 12 December 19381939: 9 January 1939 to 17 December 19391940: 13 January 1940 to 10 November 19401941: 31 March 1941 to 3 November 19411942: 7 March 1942 to 26 December 19421943: 16 January 1943 to 6 November 19431944: 6 February 1944 to 21 December 19441945: 6 January 1945 to 30 December 19451946: 5 January 1946 to 27 December 19461947: 26 January 1947 to 6 December 19471948: 19 March 1948 to 25 December 19481949: 14 February 1949 to 12 December 19491950: 19 January 1950 to 27 December 19501951: 19 January 1951 to 7 December 19511952: 10 January 1952 to 16 November 19521953: 9 January 1953 to 6 December 19531954: 21 January 1954 to 5 December 19541955: 6 January 1955 to 26 December 19551956: 28 January 1956 to 9 December 19561957: 6 January 1957 to 17 November 19571958: 27 February 1958 to 18 November 19581959: 18 February 1959 to 6 November 19591960: 15 January 1960 to 29 November 19601961: 18 February 1961 to 11 December 19611962: 5 February 1962 to 28 November 19621963: 11 January 1963 to 8 November 19631964: 4 March 1964 to 27 December 19641965: 31 January 1965 to 27 November 19651966: 4 March 1966 to 27 November 19661967: 11 February 1967 to 22 December 19671968: 30 March 1968 to 28 December 19681969: 22 January 1969 to 14 November 19691970: 26 March 1970 to 29 December 19701973: 14 February 1973 to 30 December 19731974: 3 February 1974 to 2 November 19741975: 16 February 1975 to 10 November 19751976: 13 March 1976 to 5 October 19761977: 19 March 1977 to 6 December 19771978: 1 March 1978 to 8 December 19781979: 9 March 1979 to 28 November 19791980: 5 March 1980 to 10 November 19801981: 11 February 1981 to 23 December 19811982: 4 January 1982 to 24 November 19821983: 1 February 1983 to 12 December 19831984: 19 February 1984 to 16 November 19841985: 24 February 1985 to 1 December 19851986: 1 January 1986 to 24 November 19861988: 29 February 1988 to 27 November 19881989: 4 January 1989 to 28 November 19891990: 16 February 1990 to 28 November 19901992: 7 March 1992 to 4 November 19921993: 11 March 1993 to 20 November 19931995: 4 February 1995 to 3 November 19951996: 16 February 1996 to 15 December 19961997: 5 January 1997 to 29 November 19971998: 6 March 1998 to 1 November 19981999: 18 January 1999 to 24 November 19992000: 11 January 2000 to 13 November 20002001: 27 February 2001 to 28 November 20012002: 24 January 2002 to 12 November 20022003: 4 February 2003 to 24 November 20032004: 29 March 2004 to 30 November 20042005: 3 January 2005 to 16 November 20052006: 3 January 2006 to 30 November 20062007: 25 February 2007 to 12 December 20072008: 9 January 2008 to 10 December 20082009: 20 January 2009 to 29 November 20092010: 11 March 2010 to 1 December 20102011: 1 January 2011 to 27 November 20112012: 23 February 2012 to 19 December 20122013: 31 January 2013 to 23 November 20132014: 21 February 2014 to 31 October 20142015: 17 February 2015 to 26 December 20152016: 1 February 2016 to 29 December 20162020: 15 January 2020 to 24 December 20202021: 26 January 2021 to 30 December 20212022: 1 January 2022 to 11 December 20222023: 17 January 2023 to 10 November 20232025: 1 January 2025 to 26 November 20252026: 3 January 2026 to 15 October 202619131930194319561969198420002013JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Harlingen meeting 30 C (86 F).
First to last qualifying date each year at Harlingen
YearFirst dateLast date
19131913-02-201913-12-03
19141914-01-091914-11-08
19151915-04-221915-11-25
19201920-02-231920-12-21
19211921-02-051921-12-31
19221922-01-181922-12-14
19231923-01-081923-10-17
19241924-02-031924-12-08
19251925-02-101925-12-03
19261926-02-121926-11-28
19271927-01-301927-12-13
19281928-01-131928-11-18
19291929-01-201929-11-17
19301930-02-131930-11-20
19311931-03-221931-12-12
19321932-01-171932-11-07
19331933-01-251933-12-25
19341934-02-251934-12-31
19351935-01-071935-11-11
19361936-02-031936-12-03
19371937-02-081937-11-26
19381938-01-181938-12-12
19391939-01-091939-12-17
19401940-01-131940-11-10
19411941-03-311941-11-03
19421942-03-071942-12-26
19431943-01-161943-11-06
19441944-02-061944-12-21
19451945-01-061945-12-30
19461946-01-051946-12-27
19471947-01-261947-12-06
19481948-03-191948-12-25
19491949-02-141949-12-12
19501950-01-191950-12-27
19511951-01-191951-12-07
19521952-01-101952-11-16
19531953-01-091953-12-06
19541954-01-211954-12-05
19551955-01-061955-12-26
19561956-01-281956-12-09
19571957-01-061957-11-17
19581958-02-271958-11-18
19591959-02-181959-11-06
19601960-01-151960-11-29
19611961-02-181961-12-11
19621962-02-051962-11-28
19631963-01-111963-11-08
19641964-03-041964-12-27
19651965-01-311965-11-27
19661966-03-041966-11-27
19671967-02-111967-12-22
19681968-03-301968-12-28
19691969-01-221969-11-14
19701970-03-261970-12-29
19731973-02-141973-12-30
19741974-02-031974-11-02
19751975-02-161975-11-10
19761976-03-131976-10-05
19771977-03-191977-12-06
19781978-03-011978-12-08
19791979-03-091979-11-28
19801980-03-051980-11-10
19811981-02-111981-12-23
19821982-01-041982-11-24
19831983-02-011983-12-12
19841984-02-191984-11-16
19851985-02-241985-12-01
19861986-01-011986-11-24
19881988-02-291988-11-27
19891989-01-041989-11-28
19901990-02-161990-11-28
19921992-03-071992-11-04
19931993-03-111993-11-20
19951995-02-041995-11-03
19961996-02-161996-12-15
19971997-01-051997-11-29
19981998-03-061998-11-01
19991999-01-181999-11-24
20002000-01-112000-11-13
20012001-02-272001-11-28
20022002-01-242002-11-12
20032003-02-042003-11-24
20042004-03-292004-11-30
20052005-01-032005-11-16
20062006-01-032006-11-30
20072007-02-252007-12-12
20082008-01-092008-12-10
20092009-01-202009-11-29
20102010-03-112010-12-01
20112011-01-012011-11-27
20122012-02-232012-12-19
20132013-01-312013-11-23
20142014-02-212014-10-31
20152015-02-172015-12-26
20162016-02-012016-12-29
20202020-01-152020-12-24
20212021-01-262021-12-30
20222022-01-012022-12-11
20232023-01-172023-11-10
20252025-01-012025-11-26
20262026-01-032026-10-15

Every Fixed Threshold

Fixed thresholds at Harlingen
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1012321945188
35 C (95 F): Days101123202386
40 C (104 F): Days35619431
90 F (32.2 C): Days1011871927136
100 F (37.8 C): Days9463202323
0 C (32 F): Ice days (max8319891
0 C (32 F): Frost days (min681319633
-10 C (14 F): Days with min1119621
20 C (68 F): Tropical nights (min1012232023192
25 C (77 F): Days with min961012023100
10 mm (0.39 in): Days with 10 mm or more rain10336197314
25 mm (0.98 in): Days with 25 mm or more rain1031619358
50 mm (1.97 in): Days with 50 mm or more rain90619331
100 mm (3.94 in): Days with 100 mm or more rain33320253
200 mm (7.87 in): Days with 200 mm or more rain4119761

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1913.

Download the Data

  • Data for Harlingen 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 (2026-10-17).