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Built 2026-10-19 (19 October 2026)

Tucson U of A #1 Threshold Days by Year (USC00028817)

13 fixed thresholds counted per year at Tucson U of A #1 (USC00028817): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tucson U of A #1 Thresholds

  • Tucson U of A #1: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1983 with 20.
  • Tucson U of A #1: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 2007 with 216.
  • Tucson U of A #1: days with a maximum temperature at or above 35 C (95 F) in 27 years, most in 1989 with 152.
  • Tucson U of A #1: days with a maximum temperature at or above 40 C (104 F) in 27 years, most in 2002 with 53.
  • 13 fixed thresholds have at least one qualifying day at Tucson U of A #1.
27 years with a qualifying day
Days at or above 30 C (86 F) per year at Tucson U of A #1 Days per year at Tucson U of A #1 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 216 in 2007. 01002003001983: 1571984: 1651985: 1751986: 1891987: 1891988: 1971989: 1991990: 1931991: 1741992: 1861993: 1821994: 1711995: 1861996: 1931997: 2021998: 1821999: 2112000: 1872001: 2042002: 1982003: 1872004: 1952005: 1952006: 1842007: 2162008: 2012011: 190198319861989199219951998200120042007
Days per year at Tucson U of A #1 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 216 in 2007.
Days at or above 30 C (86 F) per year at Tucson U of A #1
YearDaysDecade average
1983157181.6
1984165181.6
1985175181.6
1986189181.6
1987189181.6
1988197181.6
1989199181.6
1990193188
1991174188
1992186188
1993182188
1994171188
1995186188
1996193188
1997202188
1998182188
1999211188
2000187196.3
2001204196.3
2002198196.3
2003187196.3
2004195196.3
2005195196.3
2006184196.3
2007216196.3
2008201196.3
2011190190
First to last qualifying date each year at Tucson U of A #1 For each year, a bar from the first to the last day at Tucson U of A #1 meeting 30 C (86 F). 1983: 17 April 1983 to 23 October 19831984: 14 March 1984 to 7 November 19841985: 2 April 1985 to 4 November 19851986: 24 February 1986 to 31 October 19861987: 2 April 1987 to 4 November 19871988: 20 March 1988 to 7 November 19881989: 24 February 1989 to 10 November 19891990: 19 March 1990 to 18 November 19901991: 5 April 1991 to 8 November 19911992: 11 April 1992 to 24 October 19921993: 10 April 1993 to 26 October 19931994: 16 March 1994 to 29 October 19941995: 16 March 1995 to 25 November 19951996: 10 March 1996 to 19 November 19961997: 9 March 1997 to 25 November 19971998: 23 March 1998 to 27 November 19981999: 24 January 1999 to 30 November 19992000: 15 January 2000 to 19 October 20002001: 20 March 2001 to 12 November 20012002: 23 February 2002 to 22 November 20022003: 31 January 2003 to 9 November 20032004: 18 February 2004 to 17 October 20042005: 11 March 2005 to 10 November 20052006: 3 April 2006 to 28 October 20062007: 7 March 2007 to 20 November 20072008: 24 March 2008 to 20 November 20082011: 10 March 2011 to 1 November 20111983198719911995199920032007JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Tucson U of A #1 meeting 30 C (86 F).
First to last qualifying date each year at Tucson U of A #1
YearFirst dateLast date
19831983-04-171983-10-23
19841984-03-141984-11-07
19851985-04-021985-11-04
19861986-02-241986-10-31
19871987-04-021987-11-04
19881988-03-201988-11-07
19891989-02-241989-11-10
19901990-03-191990-11-18
19911991-04-051991-11-08
19921992-04-111992-10-24
19931993-04-101993-10-26
19941994-03-161994-10-29
19951995-03-161995-11-25
19961996-03-101996-11-19
19971997-03-091997-11-25
19981998-03-231998-11-27
19991999-01-241999-11-30
20002000-01-152000-10-19
20012001-03-202001-11-12
20022002-02-232002-11-22
20032003-01-312003-11-09
20042004-02-182004-10-17
20052005-03-112005-11-10
20062006-04-032006-10-28
20072007-03-072007-11-20
20082008-03-242008-11-20
20112011-03-102011-11-01

Every Fixed Threshold

Fixed thresholds at Tucson U of A #1
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days272162007190
35 C (95 F): Days271521989125
40 C (104 F): Days2753200239
45 C (113 F): Days7219901
90 F (32.2 C): Days271891999164
100 F (37.8 C): Days27108200083
110 F (43.3 C): Days23819904
0 C (32 F): Frost days (min2742199037
20 C (68 F): Tropical nights (min27109200784
25 C (77 F): Days with min2737199426
10 mm (0.39 in): Days with 10 mm or more rain282019834
25 mm (0.98 in): Days with 25 mm or more rain23519832
50 mm (1.97 in): Days with 50 mm or more rain3219831

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1983.

Download the Data

  • Data for Tucson U of A #1 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).