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

Tucson Intl AP Threshold Days by Year (USW00023160)

14 fixed thresholds counted per year at Tucson Intl AP (USW00023160): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tucson Intl AP Thresholds

  • Tucson Intl AP: days with a maximum temperature at or above 30 C (86 F) in 79 years, most in 2017 with 221.
  • Tucson Intl AP: days with a maximum temperature at or above 35 C (95 F) in 79 years, most in 1989 with 155.
  • Tucson Intl AP: days with a maximum temperature at or above 40 C (104 F) in 79 years, most in 2020 with 65.
  • Tucson Intl AP: days with a maximum temperature at or above 90 F (32.2 C) in 79 years, most in 2017 with 190.
  • 14 fixed thresholds have at least one qualifying day at Tucson Intl AP.
79 years with a qualifying day
Days at or above 30 C (86 F) per year at Tucson Intl AP Days per year at Tucson Intl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 221 in 2017. 01002003001948: 1721949: 1651950: 1901951: 1711952: 1881953: 1701954: 1931955: 1691956: 1791957: 1561958: 1651959: 1791960: 1681961: 1621962: 1701963: 1751964: 1551965: 1641966: 1571967: 1701968: 1591969: 1651970: 1431971: 1451972: 1751973: 1641974: 1561975: 1551976: 1491977: 1591978: 1701979: 1721980: 1681981: 1681982: 1551983: 1451984: 1631985: 1681986: 1881987: 1841988: 1991989: 2081990: 1951991: 1761992: 1891993: 1791994: 1831995: 1821996: 1781997: 1841998: 1651999: 1972000: 1782001: 1882002: 1812003: 1802004: 1852005: 1752006: 1772007: 1972008: 1902009: 1882010: 1762011: 1862012: 2012013: 1932014: 1872015: 1722016: 1972017: 2212018: 1832019: 1722020: 2002021: 1992022: 1932023: 1972024: 1932025: 2012026: 1931948195619641972198019881996200420122020
Days per year at Tucson Intl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 221 in 2017.
Days at or above 30 C (86 F) per year at Tucson Intl AP
YearDaysDecade average
1948172168.5
1949165168.5
1950190176
1951171176
1952188176
1953170176
1954193176
1955169176
1956179176
1957156176
1958165176
1959179176
1960168164.5
1961162164.5
1962170164.5
1963175164.5
1964155164.5
1965164164.5
1966157164.5
1967170164.5
1968159164.5
1969165164.5
1970143158.8
1971145158.8
1972175158.8
1973164158.8
1974156158.8
1975155158.8
1976149158.8
1977159158.8
1978170158.8
1979172158.8
1980168174.6
1981168174.6
1982155174.6
1983145174.6
1984163174.6
1985168174.6
1986188174.6
1987184174.6
1988199174.6
1989208174.6
1990195182.8
1991176182.8
1992189182.8
1993179182.8
1994183182.8
1995182182.8
1996178182.8
1997184182.8
1998165182.8
1999197182.8
2000178183.9
2001188183.9
2002181183.9
2003180183.9
2004185183.9
2005175183.9
2006177183.9
2007197183.9
2008190183.9
2009188183.9
2010176188.8
2011186188.8
2012201188.8
2013193188.8
2014187188.8
2015172188.8
2016197188.8
2017221188.8
2018183188.8
2019172188.8
2020200196.6
2021199196.6
2022193196.6
2023197196.6
2024193196.6
2025201196.6
2026193196.6
First to last qualifying date each year at Tucson Intl AP For each year, a bar from the first to the last day at Tucson Intl AP meeting 30 C (86 F). 1948: 10 April 1948 to 16 October 19481949: 15 March 1949 to 5 November 19491950: 22 March 1950 to 26 November 19501951: 10 February 1951 to 24 October 19511952: 4 April 1952 to 2 November 19521953: 10 January 1953 to 13 November 19531954: 6 April 1954 to 11 November 19541955: 8 March 1955 to 31 October 19551956: 18 March 1956 to 26 October 19561957: 13 February 1957 to 10 October 19571958: 18 April 1958 to 20 October 19581959: 1 April 1959 to 28 October 19591960: 7 March 1960 to 22 October 19601961: 3 April 1961 to 21 October 19611962: 26 March 1962 to 12 November 19621963: 6 February 1963 to 29 October 19631964: 30 March 1964 to 29 October 19641965: 31 March 1965 to 30 October 19651966: 1 April 1966 to 29 October 19661967: 16 March 1967 to 15 November 19671968: 29 April 1968 to 29 October 19681969: 30 March 1969 to 17 October 19691970: 6 April 1970 to 26 September 19701971: 23 March 1971 to 11 November 19711972: 5 March 1972 to 16 October 19721973: 26 April 1973 to 9 November 19731974: 5 April 1974 to 20 October 19741975: 21 April 1975 to 5 November 19751976: 1 April 1976 to 11 October 19761977: 6 April 1977 to 4 November 19771978: 26 March 1978 to 19 October 19781979: 14 April 1979 to 26 October 19791980: 9 April 1980 to 6 November 19801981: 6 April 1981 to 24 November 19811982: 11 April 1982 to 24 October 19821983: 17 April 1983 to 13 October 19831984: 12 April 1984 to 6 November 19841985: 2 April 1985 to 4 November 19851986: 24 February 1986 to 30 October 19861987: 27 January 1987 to 30 October 19871988: 12 February 1988 to 7 November 19881989: 23 February 1989 to 11 November 19891990: 25 February 1990 to 18 November 19901991: 10 March 1991 to 8 November 19911992: 25 March 1992 to 27 October 19921993: 9 April 1993 to 10 November 19931994: 16 March 1994 to 6 November 19941995: 16 March 1995 to 29 October 19951996: 10 March 1996 to 13 November 19961997: 11 March 1997 to 3 November 19971998: 24 March 1998 to 26 November 19981999: 24 January 1999 to 29 November 19992000: 4 April 2000 to 18 October 20002001: 20 March 2001 to 4 November 20012002: 23 February 2002 to 16 October 20022003: 1 February 2003 to 25 October 20032004: 8 March 2004 to 16 October 20042005: 11 March 2005 to 10 November 20052006: 3 April 2006 to 8 November 20062007: 7 March 2007 to 19 November 20072008: 24 March 2008 to 17 November 20082009: 23 February 2009 to 11 November 20092010: 29 March 2010 to 6 November 20102011: 10 March 2011 to 1 November 20112012: 24 March 2012 to 7 November 20122013: 13 March 2013 to 12 November 20132014: 14 February 2014 to 1 November 20142015: 26 March 2015 to 26 October 20152016: 12 February 2016 to 15 November 20162017: 9 February 2017 to 27 November 20172018: 22 March 2018 to 29 October 20182019: 6 March 2019 to 18 November 20192020: 20 April 2020 to 22 November 20202021: 7 March 2021 to 15 November 20212022: 2 March 2022 to 22 October 20222023: 9 April 2023 to 15 November 20232024: 25 February 2024 to 14 November 20242025: 3 February 2025 to 14 November 20252026: 26 February 2026 to 10 October 202619481958196819781988199820082018JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Tucson Intl AP meeting 30 C (86 F).
First to last qualifying date each year at Tucson Intl AP
YearFirst dateLast date
19481948-04-101948-10-16
19491949-03-151949-11-05
19501950-03-221950-11-26
19511951-02-101951-10-24
19521952-04-041952-11-02
19531953-01-101953-11-13
19541954-04-061954-11-11
19551955-03-081955-10-31
19561956-03-181956-10-26
19571957-02-131957-10-10
19581958-04-181958-10-20
19591959-04-011959-10-28
19601960-03-071960-10-22
19611961-04-031961-10-21
19621962-03-261962-11-12
19631963-02-061963-10-29
19641964-03-301964-10-29
19651965-03-311965-10-30
19661966-04-011966-10-29
19671967-03-161967-11-15
19681968-04-291968-10-29
19691969-03-301969-10-17
19701970-04-061970-09-26
19711971-03-231971-11-11
19721972-03-051972-10-16
19731973-04-261973-11-09
19741974-04-051974-10-20
19751975-04-211975-11-05
19761976-04-011976-10-11
19771977-04-061977-11-04
19781978-03-261978-10-19
19791979-04-141979-10-26
19801980-04-091980-11-06
19811981-04-061981-11-24
19821982-04-111982-10-24
19831983-04-171983-10-13
19841984-04-121984-11-06
19851985-04-021985-11-04
19861986-02-241986-10-30
19871987-01-271987-10-30
19881988-02-121988-11-07
19891989-02-231989-11-11
19901990-02-251990-11-18
19911991-03-101991-11-08
19921992-03-251992-10-27
19931993-04-091993-11-10
19941994-03-161994-11-06
19951995-03-161995-10-29
19961996-03-101996-11-13
19971997-03-111997-11-03
19981998-03-241998-11-26
19991999-01-241999-11-29
20002000-04-042000-10-18
20012001-03-202001-11-04
20022002-02-232002-10-16
20032003-02-012003-10-25
20042004-03-082004-10-16
20052005-03-112005-11-10
20062006-04-032006-11-08
20072007-03-072007-11-19
20082008-03-242008-11-17
20092009-02-232009-11-11
20102010-03-292010-11-06
20112011-03-102011-11-01
20122012-03-242012-11-07
20132013-03-132013-11-12
20142014-02-142014-11-01
20152015-03-262015-10-26
20162016-02-122016-11-15
20172017-02-092017-11-27
20182018-03-222018-10-29
20192019-03-062019-11-18
20202020-04-202020-11-22
20212021-03-072021-11-15
20222022-03-022022-10-22
20232023-04-092023-11-15
20242024-02-252024-11-14
20252025-02-032025-11-14
20262026-02-262026-10-10

Every Fixed Threshold

Fixed thresholds at Tucson Intl AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days792212017193
35 C (95 F): Days791551989122
40 C (104 F): Days7965202039
45 C (113 F): Days11519942
90 F (32.2 C): Days791902017164
100 F (37.8 C): Days79112202477
110 F (43.3 C): Days411820231
0 C (32 F): Frost days (min784019487
20 C (68 F): Tropical nights (min791292025133
25 C (77 F): Days with min7961202454
10 mm (0.39 in): Days with 10 mm or more rain791819835
25 mm (0.98 in): Days with 25 mm or more rain67719552
50 mm (1.97 in): Days with 50 mm or more rain11219551
10 cm (3.9 in): Days with 10 cm or more snowfall4119581

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

  • Data for Tucson Intl AP 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).