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Built 2026-10-18 (18 October 2026)

Granger Dam Threshold Days by Year

15 fixed thresholds counted per year at Granger Dam (USC00413686): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Granger Dam Thresholds

  • Granger Dam: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1991 with 38.
  • Granger Dam: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1992 with 18.
  • Granger Dam: days with 50 mm (1.97 in) or more of precipitation in 34 years, most in 2001 with 9.
  • Granger Dam: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1999 with 166.
  • 15 fixed thresholds have at least one qualifying day at Granger Dam.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Granger Dam Days per year at Granger Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 166 in 1999. 0501001502001981: 1321982: 1411983: 1221984: 1491986: 1191987: 1211989: 1411990: 1451991: 1331992: 1211993: 1341994: 1301995: 1281996: 1371997: 1341998: 1441999: 1662000: 1382001: 1212002: 1432003: 1402008: 1472009: 1342010: 1402012: 1562013: 1392014: 1452015: 1472016: 1402017: 1341981198419891992199519982001200820122015
Days per year at Granger Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 166 in 1999.
Days at or above 30 C (86 F) per year at Granger Dam
YearDaysDecade average
1981132132.1
1982141132.1
1983122132.1
1984149132.1
1986119132.1
1987121132.1
1989141132.1
1990145137.2
1991133137.2
1992121137.2
1993134137.2
1994130137.2
1995128137.2
1996137137.2
1997134137.2
1998144137.2
1999166137.2
2000138137.2
2001121137.2
2002143137.2
2003140137.2
2008147137.2
2009134137.2
2010140143
2012156143
2013139143
2014145143
2015147143
2016140143
2017134143
First to last qualifying date each year at Granger Dam For each year, a bar from the first to the last day at Granger Dam meeting 30 C (86 F). 1981: 31 March 1981 to 18 October 19811982: 20 March 1982 to 1 November 19821983: 3 May 1983 to 23 November 19831984: 28 March 1984 to 10 November 19841986: 19 February 1986 to 5 October 19861987: 11 April 1987 to 5 November 19871989: 14 March 1989 to 15 November 19891990: 28 April 1990 to 16 October 19901991: 5 March 1991 to 27 October 19911992: 25 April 1992 to 27 October 19921993: 26 April 1993 to 20 October 19931994: 11 April 1994 to 23 October 19941995: 23 March 1995 to 28 October 19951996: 21 February 1996 to 18 October 19961997: 22 March 1997 to 1 November 19971998: 1 May 1998 to 17 October 19981999: 3 March 1999 to 23 October 19992000: 20 January 2000 to 6 October 20002001: 16 April 2001 to 26 October 20012002: 21 April 2002 to 11 November 20022003: 7 April 2003 to 1 November 20032008: 26 February 2008 to 14 October 20082009: 10 April 2009 to 16 October 20092010: 27 April 2010 to 1 November 20102012: 24 February 2012 to 5 November 20122013: 5 March 2013 to 18 November 20132014: 13 April 2014 to 28 October 20142015: 10 April 2015 to 24 October 20152016: 15 March 2016 to 4 November 20162017: 24 February 2017 to 4 November 201719811986199119951999200320122016JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Granger Dam meeting 30 C (86 F).
First to last qualifying date each year at Granger Dam
YearFirst dateLast date
19811981-03-311981-10-18
19821982-03-201982-11-01
19831983-05-031983-11-23
19841984-03-281984-11-10
19861986-02-191986-10-05
19871987-04-111987-11-05
19891989-03-141989-11-15
19901990-04-281990-10-16
19911991-03-051991-10-27
19921992-04-251992-10-27
19931993-04-261993-10-20
19941994-04-111994-10-23
19951995-03-231995-10-28
19961996-02-211996-10-18
19971997-03-221997-11-01
19981998-05-011998-10-17
19991999-03-031999-10-23
20002000-01-202000-10-06
20012001-04-162001-10-26
20022002-04-212002-11-11
20032003-04-072003-11-01
20082008-02-262008-10-14
20092009-04-102009-10-16
20102010-04-272010-11-01
20122012-02-242012-11-05
20132013-03-052013-11-18
20142014-04-132014-10-28
20152015-04-102015-10-24
20162016-03-152016-11-04
20172017-02-242017-11-04

Every Fixed Threshold

Fixed thresholds at Granger Dam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days301661999134
35 C (95 F): Days3091199855
40 C (104 F): Days13620001
90 F (32.2 C): Days30131199897
100 F (37.8 C): Days263920099
110 F (43.3 C): Days1120001
0 C (32 F): Ice days (max16719891
0 C (32 F): Frost days (min294619837
-10 C (14 F): Days with min6719832
20 C (68 F): Tropical nights (min291331990119
25 C (77 F): Days with min252020165
10 mm (0.39 in): Days with 10 mm or more rain3738199127
25 mm (0.98 in): Days with 25 mm or more rain3718199212
50 mm (1.97 in): Days with 50 mm or more rain34920014
100 mm (3.94 in): Days with 100 mm or more rain7119811

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1981.

Download the Data

  • Data for Granger Dam 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).