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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Duncan Threshold Days by Year (USC00022754)

17 fixed thresholds counted per year at Duncan (USC00022754): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Duncan Thresholds

  • Duncan: days with 10 mm (0.39 in) or more of precipitation in 86 years, most in 1905 with 18.
  • Duncan: days with a maximum temperature at or above 30 C (86 F) in 78 years, most in 2020 with 182.
  • Duncan: days with a maximum temperature at or above 35 C (95 F) in 78 years, most in 2020 with 122.
  • Duncan: days with a maximum temperature at or above 90 F (32.2 C) in 78 years, most in 2020 with 161.
  • 17 fixed thresholds have at least one qualifying day at Duncan.
78 years with a qualifying day
Days at or above 30 C (86 F) per year at Duncan Days per year at Duncan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 182 in 2020. 0501001502001902: 1451903: 1281904: 991905: 1371949: 1351950: 1461951: 1351952: 1391953: 1421954: 1421955: 1221956: 1461957: 1161958: 1221959: 1171960: 1321961: 1141962: 1361963: 1601964: 1251965: 1191966: 1251967: 1211968: 1121969: 1351970: 1281971: 1281972: 1221974: 1441975: 1271976: 1311977: 1351978: 1491979: 1521980: 1421981: 1441982: 1391983: 1341984: 1351985: 1391986: 1531987: 1501988: 1611989: 1751991: 1511992: 1491993: 1431994: 1521995: 1511996: 1461997: 1521998: 1451999: 1552000: 1662001: 1712002: 1712003: 1622004: 1422005: 1532007: 1422008: 1502010: 1592011: 1652012: 1762013: 1462014: 1462015: 1392016: 1572017: 1622018: 1642019: 1472020: 1822021: 1552022: 1692023: 1762024: 1752025: 1622026: 1411902195319611969197819861995200320132021
Days per year at Duncan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 182 in 2020.
Days at or above 30 C (86 F) per year at Duncan
YearDaysDecade average
1902145127.3
1903128127.3
190499127.3
1905137127.3
1949135135
1950146132.7
1951135132.7
1952139132.7
1953142132.7
1954142132.7
1955122132.7
1956146132.7
1957116132.7
1958122132.7
1959117132.7
1960132127.9
1961114127.9
1962136127.9
1963160127.9
1964125127.9
1965119127.9
1966125127.9
1967121127.9
1968112127.9
1969135127.9
1970128135.1
1971128135.1
1972122135.1
1974144135.1
1975127135.1
1976131135.1
1977135135.1
1978149135.1
1979152135.1
1980142147.2
1981144147.2
1982139147.2
1983134147.2
1984135147.2
1985139147.2
1986153147.2
1987150147.2
1988161147.2
1989175147.2
1991151149.3
1992149149.3
1993143149.3
1994152149.3
1995151149.3
1996146149.3
1997152149.3
1998145149.3
1999155149.3
2000166157.1
2001171157.1
2002171157.1
2003162157.1
2004142157.1
2005153157.1
2007142157.1
2008150157.1
2010159156.1
2011165156.1
2012176156.1
2013146156.1
2014146156.1
2015139156.1
2016157156.1
2017162156.1
2018164156.1
2019147156.1
2020182165.7
2021155165.7
2022169165.7
2023176165.7
2024175165.7
2025162165.7
2026141165.7
First to last qualifying date each year at Duncan For each year, a bar from the first to the last day at Duncan meeting 30 C (86 F). 1902: 18 April 1902 to 21 October 19021903: 23 April 1903 to 9 October 19031904: 3 April 1904 to 4 October 19041905: 8 May 1905 to 27 October 19051949: 22 April 1949 to 30 September 19491950: 18 April 1950 to 30 October 19501951: 4 May 1951 to 18 October 19511952: 2 May 1952 to 27 October 19521953: 28 March 1953 to 11 October 19531954: 9 April 1954 to 18 October 19541955: 4 May 1955 to 13 October 19551956: 2 May 1956 to 11 October 19561957: 14 April 1957 to 2 October 19571958: 21 April 1958 to 22 September 19581959: 3 April 1959 to 25 October 19591960: 10 April 1960 to 8 October 19601961: 3 April 1961 to 28 September 19611962: 12 April 1962 to 3 October 19621963: 8 April 1963 to 15 October 19631964: 15 April 1964 to 8 October 19641965: 19 April 1965 to 11 October 19651966: 6 May 1966 to 10 October 19661967: 3 April 1967 to 23 September 19671968: 18 May 1968 to 14 October 19681969: 30 March 1969 to 1 October 19691970: 4 May 1970 to 20 September 19701971: 26 March 1971 to 28 September 19711972: 10 March 1972 to 16 October 19721974: 16 March 1974 to 26 October 19741975: 21 April 1975 to 28 October 19751976: 11 April 1976 to 11 October 19761977: 7 April 1977 to 5 October 19771978: 31 March 1978 to 21 October 19781979: 15 April 1979 to 26 October 19791980: 18 April 1980 to 12 October 19801981: 9 April 1981 to 30 September 19811982: 12 April 1982 to 24 October 19821983: 24 April 1983 to 7 October 19831984: 17 April 1984 to 24 September 19841985: 7 April 1985 to 6 October 19851986: 26 March 1986 to 18 October 19861987: 15 April 1987 to 28 October 19871988: 25 March 1988 to 31 October 19881989: 8 March 1989 to 24 October 19891991: 5 April 1991 to 20 October 19911992: 12 April 1992 to 20 October 19921993: 21 April 1993 to 5 October 19931994: 15 April 1994 to 5 October 19941995: 13 April 1995 to 28 October 19951996: 9 April 1996 to 13 October 19961997: 10 March 1997 to 11 October 19971998: 23 April 1998 to 15 October 19981999: 30 March 1999 to 6 November 19992000: 4 April 2000 to 6 October 20002001: 16 April 2001 to 3 November 20012002: 28 March 2002 to 11 October 20022003: 1 April 2003 to 24 October 20032004: 20 March 2004 to 8 October 20042005: 13 April 2005 to 23 October 20052007: 15 March 2007 to 8 November 20072008: 14 April 2008 to 31 October 20082010: 27 April 2010 to 30 October 20102011: 17 March 2011 to 23 October 20112012: 28 March 2012 to 20 October 20122013: 15 March 2013 to 13 October 20132014: 9 April 2014 to 27 October 20142015: 28 March 2015 to 15 October 20152016: 6 April 2016 to 31 October 20162017: 9 March 2017 to 23 October 20172018: 22 March 2018 to 5 October 20182019: 8 April 2019 to 17 October 20192020: 23 April 2020 to 5 November 20202021: 2 April 2021 to 25 October 20212022: 25 March 2022 to 3 October 20222023: 10 April 2023 to 7 November 20232024: 12 April 2024 to 28 October 20242025: 25 March 2025 to 3 November 20252026: 27 February 2026 to 9 September 202619021955196519761986199720082019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Duncan meeting 30 C (86 F).
First to last qualifying date each year at Duncan
YearFirst dateLast date
19021902-04-181902-10-21
19031903-04-231903-10-09
19041904-04-031904-10-04
19051905-05-081905-10-27
19491949-04-221949-09-30
19501950-04-181950-10-30
19511951-05-041951-10-18
19521952-05-021952-10-27
19531953-03-281953-10-11
19541954-04-091954-10-18
19551955-05-041955-10-13
19561956-05-021956-10-11
19571957-04-141957-10-02
19581958-04-211958-09-22
19591959-04-031959-10-25
19601960-04-101960-10-08
19611961-04-031961-09-28
19621962-04-121962-10-03
19631963-04-081963-10-15
19641964-04-151964-10-08
19651965-04-191965-10-11
19661966-05-061966-10-10
19671967-04-031967-09-23
19681968-05-181968-10-14
19691969-03-301969-10-01
19701970-05-041970-09-20
19711971-03-261971-09-28
19721972-03-101972-10-16
19741974-03-161974-10-26
19751975-04-211975-10-28
19761976-04-111976-10-11
19771977-04-071977-10-05
19781978-03-311978-10-21
19791979-04-151979-10-26
19801980-04-181980-10-12
19811981-04-091981-09-30
19821982-04-121982-10-24
19831983-04-241983-10-07
19841984-04-171984-09-24
19851985-04-071985-10-06
19861986-03-261986-10-18
19871987-04-151987-10-28
19881988-03-251988-10-31
19891989-03-081989-10-24
19911991-04-051991-10-20
19921992-04-121992-10-20
19931993-04-211993-10-05
19941994-04-151994-10-05
19951995-04-131995-10-28
19961996-04-091996-10-13
19971997-03-101997-10-11
19981998-04-231998-10-15
19991999-03-301999-11-06
20002000-04-042000-10-06
20012001-04-162001-11-03
20022002-03-282002-10-11
20032003-04-012003-10-24
20042004-03-202004-10-08
20052005-04-132005-10-23
20072007-03-152007-11-08
20082008-04-142008-10-31
20102010-04-272010-10-30
20112011-03-172011-10-23
20122012-03-282012-10-20
20132013-03-152013-10-13
20142014-04-092014-10-27
20152015-03-282015-10-15
20162016-04-062016-10-31
20172017-03-092017-10-23
20182018-03-222018-10-05
20192019-04-082019-10-17
20202020-04-232020-11-05
20212021-04-022021-10-25
20222022-03-252022-10-03
20232023-04-102023-11-07
20242024-04-122024-10-28
20252025-03-252025-11-03
20262026-02-272026-09-09

Every Fixed Threshold

Fixed thresholds at Duncan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days781822020141
35 C (95 F): Days781222020100
40 C (104 F): Days5745202044
45 C (113 F): Days1220202
90 F (32.2 C): Days781612020125
100 F (37.8 C): Days7875202069
110 F (43.3 C): Days11620231
0 C (32 F): Ice days (max5119051
0 C (32 F): Frost days (min77164197543
-10 C (14 F): Days with min7538197610
20 C (68 F): Tropical nights (min7641202438
25 C (77 F): Days with min17620245
10 mm (0.39 in): Days with 10 mm or more rain861819052
25 mm (0.98 in): Days with 25 mm or more rain60519932
50 mm (1.97 in): Days with 50 mm or more rain3219871
10 cm (3.9 in): Days with 10 cm or more snowfall4119051
25 cm (9.8 in): Days with 25 cm or more snowfall1119491

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1902.

Download the Data

  • Data for Duncan 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).