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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Rancho Seco Threshold Days by Year (MXN00001081)

8 fixed thresholds counted per year at Rancho Seco (MXN00001081): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rancho Seco Thresholds

  • Rancho Seco: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1980 with 131.
  • Rancho Seco: days with a maximum temperature at or above 90 F (32.2 C) in 26 years, most in 2001 with 49.
  • Rancho Seco: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 2004 with 23.
  • Rancho Seco: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1998 with 43.
  • 8 fixed thresholds have at least one qualifying day at Rancho Seco.
29 years with a qualifying day
Days at or above 30 C (86 F) per year at Rancho Seco Days per year at Rancho Seco with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 131 in 1980. 0501001501980: 1311981: 311982: 331983: 111984: 491987: 131988: 211989: 301992: 181993: 381994: 621995: 571996: 611997: 621998: 531999: 702000: 692001: 1042002: 542003: 552004: 272005: 512006: 582007: 352008: 502009: 582010: 462011: 662012: 341980198319881993199619992002200520082011
Days per year at Rancho Seco with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 131 in 1980.
Days at or above 30 C (86 F) per year at Rancho Seco
YearDaysDecade average
198013139.9
19813139.9
19823339.9
19831139.9
19844939.9
19871339.9
19882139.9
19893039.9
19921852.6
19933852.6
19946252.6
19955752.6
19966152.6
19976252.6
19985352.6
19997052.6
20006956.1
200110456.1
20025456.1
20035556.1
20042756.1
20055156.1
20065856.1
20073556.1
20085056.1
20095856.1
20104648.7
20116648.7
20123448.7
First to last qualifying date each year at Rancho Seco For each year, a bar from the first to the last day at Rancho Seco meeting 30 C (86 F). 1980: 10 March 1980 to 29 November 19801981: 24 March 1981 to 31 December 19811982: 8 March 1982 to 20 July 19821983: 22 April 1983 to 29 May 19831984: 29 March 1984 to 2 July 19841987: 19 March 1987 to 11 August 19871988: 12 March 1988 to 29 June 19881989: 30 April 1989 to 27 June 19891992: 8 June 1992 to 23 September 19921993: 12 April 1993 to 21 June 19931994: 1 April 1994 to 18 August 19941995: 20 March 1995 to 25 October 19951996: 20 April 1996 to 11 August 19961997: 5 March 1997 to 1 November 19971998: 11 March 1998 to 26 June 19981999: 7 April 1999 to 14 October 19992000: 19 April 2000 to 30 September 20002001: 2 April 2001 to 30 September 20012002: 26 March 2002 to 10 November 20022003: 8 March 2003 to 12 August 20032004: 7 March 2004 to 23 October 20042005: 5 April 2005 to 20 October 20052006: 13 March 2006 to 20 July 20062007: 18 April 2007 to 18 October 20072008: 24 February 2008 to 11 August 20082009: 26 February 2009 to 6 October 20092010: 5 April 2010 to 2 September 20102011: 23 March 2011 to 24 August 20112012: 26 April 2012 to 28 June 201219801984199219962000200420082012JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rancho Seco meeting 30 C (86 F).
First to last qualifying date each year at Rancho Seco
YearFirst dateLast date
19801980-03-101980-11-29
19811981-03-241981-12-31
19821982-03-081982-07-20
19831983-04-221983-05-29
19841984-03-291984-07-02
19871987-03-191987-08-11
19881988-03-121988-06-29
19891989-04-301989-06-27
19921992-06-081992-09-23
19931993-04-121993-06-21
19941994-04-011994-08-18
19951995-03-201995-10-25
19961996-04-201996-08-11
19971997-03-051997-11-01
19981998-03-111998-06-26
19991999-04-071999-10-14
20002000-04-192000-09-30
20012001-04-022001-09-30
20022002-03-262002-11-10
20032003-03-082003-08-12
20042004-03-072004-10-23
20052005-04-052005-10-20
20062006-03-132006-07-20
20072007-04-182007-10-18
20082008-02-242008-08-11
20092009-02-262009-10-06
20102010-04-052010-09-02
20112011-03-232011-08-24
20122012-04-262012-06-28

Every Fixed Threshold

Fixed thresholds at Rancho Seco
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days29131198034
35 C (95 F): Days111420011
90 F (32.2 C): Days264920014
0 C (32 F): Frost days (min254319983
10 mm (0.39 in): Days with 10 mm or more rain2623200415
25 mm (0.98 in): Days with 25 mm or more rain25920084
50 mm (1.97 in): Days with 50 mm or more rain9420081
100 mm (3.94 in): Days with 100 mm or more rain1120061

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1980.

Download the Data

  • Data for Rancho Seco 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).