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Built 2026-10-19 (19 October 2026)

Sam Rayburn Dam Threshold Days by Year (USC00417936)

15 fixed thresholds counted per year at Sam Rayburn Dam (USC00417936): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sam Rayburn Dam Thresholds

  • Sam Rayburn Dam: days with a maximum temperature at or above 30 C (86 F) in 55 years, most in 2016 with 153.
  • Sam Rayburn Dam: days with a maximum temperature at or above 35 C (95 F) in 55 years, most in 1998 with 95.
  • Sam Rayburn Dam: days with a maximum temperature at or above 90 F (32.2 C) in 55 years, most in 1998 with 134.
  • Sam Rayburn Dam: nights with a minimum temperature at or below 0 C (32 F) in 55 years, most in 1978 with 58.
  • 15 fixed thresholds have at least one qualifying day at Sam Rayburn Dam.
55 years with a qualifying day
Days at or above 30 C (86 F) per year at Sam Rayburn Dam Days per year at Sam Rayburn Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 153 in 2016. 0501001502001968: 1191969: 1341970: 1351971: 1311972: 1431973: 1321974: 1221975: 1201976: 1041977: 1331978: 1341979: 1201980: 1351981: 1341982: 1331983: 1011984: 1371985: 1291986: 1301987: 1271988: 1361989: 1261990: 1421991: 1401992: 1211993: 1261994: 1041995: 1301996: 1391997: 1321998: 1491999: 1472000: 1452001: 1372002: 1452003: 1222004: 1212005: 1262006: 1272007: 1122008: 1172009: 1172014: 1032015: 1352016: 1532017: 1312018: 1462019: 1502020: 1302021: 1182022: 1502023: 1482024: 1292025: 1352026: 1091968197419801986199219982004201420202026
Days per year at Sam Rayburn Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 153 in 2016.
Days at or above 30 C (86 F) per year at Sam Rayburn Dam
YearDaysDecade average
1968119126.5
1969134126.5
1970135127.4
1971131127.4
1972143127.4
1973132127.4
1974122127.4
1975120127.4
1976104127.4
1977133127.4
1978134127.4
1979120127.4
1980135128.8
1981134128.8
1982133128.8
1983101128.8
1984137128.8
1985129128.8
1986130128.8
1987127128.8
1988136128.8
1989126128.8
1990142133
1991140133
1992121133
1993126133
1994104133
1995130133
1996139133
1997132133
1998149133
1999147133
2000145126.9
2001137126.9
2002145126.9
2003122126.9
2004121126.9
2005126126.9
2006127126.9
2007112126.9
2008117126.9
2009117126.9
2014103136.3
2015135136.3
2016153136.3
2017131136.3
2018146136.3
2019150136.3
2020130131.3
2021118131.3
2022150131.3
2023148131.3
2024129131.3
2025135131.3
2026109131.3
First to last qualifying date each year at Sam Rayburn Dam For each year, a bar from the first to the last day at Sam Rayburn Dam meeting 30 C (86 F). 1968: 14 May 1968 to 17 October 19681969: 21 May 1969 to 20 October 19691970: 8 April 1970 to 27 October 19701971: 23 March 1971 to 29 October 19711972: 8 April 1972 to 1 November 19721973: 13 March 1973 to 9 November 19731974: 20 March 1974 to 12 October 19741975: 25 April 1975 to 25 October 19751976: 23 May 1976 to 27 September 19761977: 7 May 1977 to 21 October 19771978: 24 April 1978 to 22 October 19781979: 17 April 1979 to 22 October 19791980: 7 May 1980 to 19 October 19801981: 31 March 1981 to 21 October 19811982: 19 March 1982 to 10 October 19821983: 20 May 1983 to 8 October 19831984: 28 March 1984 to 2 November 19841985: 16 April 1985 to 19 October 19851986: 21 February 1986 to 6 October 19861987: 18 April 1987 to 28 September 19871988: 23 April 1988 to 5 November 19881989: 31 March 1989 to 9 November 19891990: 22 April 1990 to 18 October 19901991: 7 March 1991 to 19 November 19911992: 24 April 1992 to 27 October 19921993: 5 May 1993 to 20 October 19931994: 28 April 1994 to 5 October 19941995: 10 May 1995 to 28 October 19951996: 23 February 1996 to 27 October 19961997: 29 March 1997 to 25 October 19971998: 8 April 1998 to 18 October 19981999: 8 April 1999 to 30 November 19992000: 29 March 2000 to 31 October 20002001: 10 April 2001 to 25 October 20012002: 10 April 2002 to 7 October 20022003: 19 April 2003 to 24 October 20032004: 1 May 2004 to 29 October 20042005: 14 March 2005 to 21 October 20052006: 17 April 2006 to 6 October 20062007: 30 April 2007 to 10 October 20072008: 24 April 2008 to 30 September 20082009: 23 April 2009 to 16 October 20092014: 28 April 2014 to 8 October 20142015: 8 April 2015 to 23 October 20152016: 15 March 2016 to 4 November 20162017: 9 February 2017 to 7 November 20172018: 24 February 2018 to 15 October 20182019: 10 April 2019 to 21 October 20192020: 20 March 2020 to 23 October 20202021: 9 April 2021 to 22 October 20212022: 28 March 2022 to 16 October 20222023: 23 February 2023 to 8 November 20232024: 15 March 2024 to 29 October 20242025: 14 March 2025 to 19 October 20252026: 8 March 2026 to 13 October 202619681975198219891996200320142021JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Sam Rayburn Dam meeting 30 C (86 F).
First to last qualifying date each year at Sam Rayburn Dam
YearFirst dateLast date
19681968-05-141968-10-17
19691969-05-211969-10-20
19701970-04-081970-10-27
19711971-03-231971-10-29
19721972-04-081972-11-01
19731973-03-131973-11-09
19741974-03-201974-10-12
19751975-04-251975-10-25
19761976-05-231976-09-27
19771977-05-071977-10-21
19781978-04-241978-10-22
19791979-04-171979-10-22
19801980-05-071980-10-19
19811981-03-311981-10-21
19821982-03-191982-10-10
19831983-05-201983-10-08
19841984-03-281984-11-02
19851985-04-161985-10-19
19861986-02-211986-10-06
19871987-04-181987-09-28
19881988-04-231988-11-05
19891989-03-311989-11-09
19901990-04-221990-10-18
19911991-03-071991-11-19
19921992-04-241992-10-27
19931993-05-051993-10-20
19941994-04-281994-10-05
19951995-05-101995-10-28
19961996-02-231996-10-27
19971997-03-291997-10-25
19981998-04-081998-10-18
19991999-04-081999-11-30
20002000-03-292000-10-31
20012001-04-102001-10-25
20022002-04-102002-10-07
20032003-04-192003-10-24
20042004-05-012004-10-29
20052005-03-142005-10-21
20062006-04-172006-10-06
20072007-04-302007-10-10
20082008-04-242008-09-30
20092009-04-232009-10-16
20142014-04-282014-10-08
20152015-04-082015-10-23
20162016-03-152016-11-04
20172017-02-092017-11-07
20182018-02-242018-10-15
20192019-04-102019-10-21
20202020-03-202020-10-23
20212021-04-092021-10-22
20222022-03-282022-10-16
20232023-02-232023-11-08
20242024-03-152024-10-29
20252025-03-142025-10-19
20262026-03-082026-10-13

Every Fixed Threshold

Fixed thresholds at Sam Rayburn Dam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days551532016109
35 C (95 F): Days5595199835
40 C (104 F): Days61720231
90 F (32.2 C): Days55134199881
100 F (37.8 C): Days2951199811
0 C (32 F): Ice days (max15519894
0 C (32 F): Frost days (min555819788
-10 C (14 F): Days with min9419891
20 C (68 F): Tropical nights (min551512018113
25 C (77 F): Days with min263520239
10 mm (0.39 in): Days with 10 mm or more rain5562199122
25 mm (0.98 in): Days with 25 mm or more rain5530197511
50 mm (1.97 in): Days with 50 mm or more rain551220042
100 mm (3.94 in): Days with 100 mm or more rain34319991
200 mm (7.87 in): Days with 200 mm or more rain4119991

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Sam Rayburn 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).