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Built 2026-10-19 (19 October 2026)

Tucson 17 NW Threshold Days by Year

13 fixed thresholds counted per year at Tucson 17 NW (USC00028795): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tucson 17 NW Thresholds

  • Tucson 17 NW: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1983 with 20.
  • Tucson 17 NW: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1983 with 7.
  • Tucson 17 NW: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1989 with 200.
  • Tucson 17 NW: days with a maximum temperature at or above 35 C (95 F) in 24 years, most in 1989 with 147.
  • 13 fixed thresholds have at least one qualifying day at Tucson 17 NW.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Tucson 17 NW Days per year at Tucson 17 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 200 in 1989. 0501001502001983: 1551984: 1521985: 1841986: 1811987: 1781988: 1911989: 2001990: 1941991: 1721992: 1831999: 1952001: 1922002: 1812003: 1772004: 1892005: 1702007: 1932008: 1842013: 1762014: 1872015: 1702016: 1822017: 1952026: 18619831986198919922002200520132016
Days per year at Tucson 17 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 200 in 1989.
Days at or above 30 C (86 F) per year at Tucson 17 NW
YearDaysDecade average
1983155177.3
1984152177.3
1985184177.3
1986181177.3
1987178177.3
1988191177.3
1989200177.3
1990194186
1991172186
1992183186
1999195186
2001192183.7
2002181183.7
2003177183.7
2004189183.7
2005170183.7
2007193183.7
2008184183.7
2013176182
2014187182
2015170182
2016182182
2017195182
2026186186
First to last qualifying date each year at Tucson 17 NW For each year, a bar from the first to the last day at Tucson 17 NW meeting 30 C (86 F). 1983: 17 April 1983 to 18 November 19831984: 20 March 1984 to 12 November 19841985: 1 April 1985 to 6 November 19851986: 20 January 1986 to 1 November 19861987: 3 April 1987 to 29 October 19871988: 21 March 1988 to 8 November 19881989: 24 February 1989 to 12 November 19891990: 25 February 1990 to 20 November 19901991: 6 April 1991 to 10 November 19911992: 12 April 1992 to 25 October 19921999: 22 March 1999 to 1 December 19992001: 21 March 2001 to 11 November 20012002: 24 February 2002 to 23 November 20022003: 1 February 2003 to 30 October 20032004: 19 February 2004 to 17 October 20042005: 3 April 2005 to 10 November 20052007: 8 March 2007 to 20 November 20072008: 26 March 2008 to 18 November 20082013: 14 March 2013 to 14 November 20132014: 16 February 2014 to 9 November 20142015: 28 March 2015 to 28 October 20152016: 13 February 2016 to 21 November 20162017: 10 March 2017 to 28 November 20172026: 26 February 2026 to 5 October 202619831986198919922002200520132016JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Tucson 17 NW meeting 30 C (86 F).
First to last qualifying date each year at Tucson 17 NW
YearFirst dateLast date
19831983-04-171983-11-18
19841984-03-201984-11-12
19851985-04-011985-11-06
19861986-01-201986-11-01
19871987-04-031987-10-29
19881988-03-211988-11-08
19891989-02-241989-11-12
19901990-02-251990-11-20
19911991-04-061991-11-10
19921992-04-121992-10-25
19991999-03-221999-12-01
20012001-03-212001-11-11
20022002-02-242002-11-23
20032003-02-012003-10-30
20042004-02-192004-10-17
20052005-04-032005-11-10
20072007-03-082007-11-20
20082008-03-262008-11-18
20132013-03-142013-11-14
20142014-02-162014-11-09
20152015-03-282015-10-28
20162016-02-132016-11-21
20172017-03-102017-11-28
20262026-02-262026-10-05

Every Fixed Threshold

Fixed thresholds at Tucson 17 NW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days242001989186
35 C (95 F): Days241471989118
40 C (104 F): Days2455201340
45 C (113 F): Days7620176
90 F (32.2 C): Days241741999161
100 F (37.8 C): Days2487200185
110 F (43.3 C): Days171019858
0 C (32 F): Frost days (min212120071
20 C (68 F): Tropical nights (min211252001123
25 C (77 F): Days with min2138200252
10 mm (0.39 in): Days with 10 mm or more rain3320198311
25 mm (0.98 in): Days with 25 mm or more rain26719833
50 mm (1.97 in): Days with 50 mm or more rain2119831

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 17 NW 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).