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Built 2026-10-19 (19 October 2026)

Stanford Threshold Days by Year (USC00247864)

16 fixed thresholds counted per year at Stanford (USC00247864): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Stanford Thresholds

  • Stanford: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 2010 with 18.
  • Stanford: days with a maximum temperature at or above 30 C (86 F) in 53 years, most in 1988 with 48.
  • Stanford: days with a maximum temperature at or below 0 C (32 F) in 53 years, most in 1996 with 62.
  • Stanford: nights with a minimum temperature at or below 0 C (32 F) in 53 years, most in 1969 with 205.
  • 16 fixed thresholds have at least one qualifying day at Stanford.
53 years with a qualifying day
Days at or above 30 C (86 F) per year at Stanford Days per year at Stanford with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 48 in 1988. 02040601965: 81966: 381967: 271968: 91969: 331970: 261971: 401972: 121973: 321974: 201983: 251985: 301986: 171987: 251988: 481989: 181990: 341991: 351992: 261993: 51994: 331995: 121996: 261997: 131998: 351999: 282000: 332001: 402002: 182003: 452004: 182005: 352006: 312007: 392008: 192009: 232010: 122011: 312012: 352013: 242014: 132015: 192016: 122017: 362018: 162019: 102020: 172021: 392022: 372023: 142024: 282025: 162026: 25196519711986199219982004201020162022
Days per year at Stanford with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 48 in 1988.
Days at or above 30 C (86 F) per year at Stanford
YearDaysDecade average
1965823
19663823
19672723
1968923
19693323
19702626
19714026
19721226
19733226
19742026
19832527.2
19853027.2
19861727.2
19872527.2
19884827.2
19891827.2
19903424.7
19913524.7
19922624.7
1993524.7
19943324.7
19951224.7
19962624.7
19971324.7
19983524.7
19992824.7
20003330.1
20014030.1
20021830.1
20034530.1
20041830.1
20053530.1
20063130.1
20073930.1
20081930.1
20092330.1
20101220.8
20113120.8
20123520.8
20132420.8
20141320.8
20151920.8
20161220.8
20173620.8
20181620.8
20191020.8
20201725.1
20213925.1
20223725.1
20231425.1
20242825.1
20251625.1
20262525.1
First to last qualifying date each year at Stanford For each year, a bar from the first to the last day at Stanford meeting 30 C (86 F). 1965: 27 July 1965 to 12 August 19651966: 6 May 1966 to 23 September 19661967: 13 July 1967 to 29 September 19671968: 6 July 1968 to 11 September 19681969: 4 June 1969 to 11 September 19691970: 22 June 1970 to 18 September 19701971: 23 June 1971 to 11 September 19711972: 31 May 1972 to 18 September 19721973: 19 May 1973 to 6 September 19731974: 16 June 1974 to 6 August 19741983: 6 July 1983 to 1 September 19831985: 7 June 1985 to 30 August 19851986: 2 June 1986 to 29 August 19861987: 5 June 1987 to 23 September 19871988: 16 May 1988 to 6 September 19881989: 19 June 1989 to 29 September 19891990: 23 June 1990 to 25 September 19901991: 11 June 1991 to 11 October 19911992: 6 May 1992 to 3 October 19921993: 21 June 1993 to 10 August 19931994: 23 June 1994 to 25 September 19941995: 8 July 1995 to 3 September 19951996: 7 June 1996 to 30 August 19961997: 26 June 1997 to 3 September 19971998: 10 July 1998 to 17 September 19981999: 11 July 1999 to 31 August 19992000: 7 June 2000 to 17 September 20002001: 12 May 2001 to 25 September 20012002: 26 June 2002 to 16 September 20022003: 30 June 2003 to 5 September 20032004: 14 July 2004 to 11 September 20042005: 21 June 2005 to 9 September 20052006: 28 June 2006 to 29 August 20062007: 28 June 2007 to 3 September 20072008: 30 June 2008 to 25 August 20082009: 25 June 2009 to 24 September 20092010: 29 June 2010 to 3 October 20102011: 28 June 2011 to 3 October 20112012: 26 June 2012 to 9 September 20122013: 2 July 2013 to 5 September 20132014: 3 July 2014 to 25 September 20142015: 26 June 2015 to 2 September 20152016: 7 June 2016 to 1 September 20162017: 8 June 2017 to 11 September 20172018: 6 July 2018 to 17 August 20182019: 23 July 2019 to 15 September 20192020: 13 June 2020 to 5 September 20202021: 3 June 2021 to 18 September 20212022: 17 June 2022 to 28 September 20222023: 17 July 2023 to 29 August 20232024: 9 July 2024 to 29 September 20242025: 2 July 2025 to 2 September 20252026: 10 July 2026 to 27 August 202619651972198819952002200920162023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Stanford meeting 30 C (86 F).
First to last qualifying date each year at Stanford
YearFirst dateLast date
19651965-07-271965-08-12
19661966-05-061966-09-23
19671967-07-131967-09-29
19681968-07-061968-09-11
19691969-06-041969-09-11
19701970-06-221970-09-18
19711971-06-231971-09-11
19721972-05-311972-09-18
19731973-05-191973-09-06
19741974-06-161974-08-06
19831983-07-061983-09-01
19851985-06-071985-08-30
19861986-06-021986-08-29
19871987-06-051987-09-23
19881988-05-161988-09-06
19891989-06-191989-09-29
19901990-06-231990-09-25
19911991-06-111991-10-11
19921992-05-061992-10-03
19931993-06-211993-08-10
19941994-06-231994-09-25
19951995-07-081995-09-03
19961996-06-071996-08-30
19971997-06-261997-09-03
19981998-07-101998-09-17
19991999-07-111999-08-31
20002000-06-072000-09-17
20012001-05-122001-09-25
20022002-06-262002-09-16
20032003-06-302003-09-05
20042004-07-142004-09-11
20052005-06-212005-09-09
20062006-06-282006-08-29
20072007-06-282007-09-03
20082008-06-302008-08-25
20092009-06-252009-09-24
20102010-06-292010-10-03
20112011-06-282011-10-03
20122012-06-262012-09-09
20132013-07-022013-09-05
20142014-07-032014-09-25
20152015-06-262015-09-02
20162016-06-072016-09-01
20172017-06-082017-09-11
20182018-07-062018-08-17
20192019-07-232019-09-15
20202020-06-132020-09-05
20212021-06-032021-09-18
20222022-06-172022-09-28
20232023-07-172023-08-29
20242024-07-092024-09-29
20252025-07-022025-09-02
20262026-07-102026-08-27

Every Fixed Threshold

Fixed thresholds at Stanford
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days5348198825
35 C (95 F): Days351420036
90 F (32.2 C): Days5127197113
100 F (37.8 C): Days5219903
0 C (32 F): Ice days (max5362199614
0 C (32 F): Frost days (min53205196997
-10 C (14 F): Days with min5381199619
-20 C (-4 F): Days with min534219967
-30 C (-22 F): Days with min341119723
-40 C (-40 F): Days with min2119681
20 C (68 F): Tropical nights (min8520071
10 mm (0.39 in): Days with 10 mm or more rain541820108
25 mm (0.98 in): Days with 25 mm or more rain42519741
50 mm (1.97 in): Days with 50 mm or more rain5119651
10 cm (3.9 in): Days with 10 cm or more snowfall271319675
25 cm (9.8 in): Days with 25 cm or more snowfall11219701

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

  • Data for Stanford 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).