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Built 2026-10-19 (19 October 2026)

Waco Dam Threshold Days by Year (USC00419417)

18 fixed thresholds counted per year at Waco Dam (USC00419417): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waco Dam Thresholds

  • Waco Dam: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 2000 with 38.
  • Waco Dam: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1976 with 19.
  • Waco Dam: days with 50 mm (1.97 in) or more of precipitation in 50 years, most in 2004 with 9.
  • Waco Dam: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 2006 with 149.
  • 18 fixed thresholds have at least one qualifying day at Waco Dam.
37 years with a qualifying day
Days at or above 30 C (86 F) per year at Waco Dam Days per year at Waco Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 149 in 2006. 0501001501966: 1171967: 1271968: 1071969: 1321970: 1171971: 1311972: 1481973: 1211974: 1201976: 1041977: 1421978: 1461979: 1131980: 1411981: 1261982: 1341983: 1191984: 1451985: 1301986: 1351987: 1181988: 1381989: 1281990: 1391991: 1201992: 1221993: 1272000: 1322001: 1292002: 1362003: 1402004: 1382006: 1492007: 1362009: 1222010: 1322017: 1341966197019741979198319871991200120062017
Days per year at Waco Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 149 in 2006.
Days at or above 30 C (86 F) per year at Waco Dam
YearDaysDecade average
1966117120.8
1967127120.8
1968107120.8
1969132120.8
1970117126.9
1971131126.9
1972148126.9
1973121126.9
1974120126.9
1976104126.9
1977142126.9
1978146126.9
1979113126.9
1980141131.4
1981126131.4
1982134131.4
1983119131.4
1984145131.4
1985130131.4
1986135131.4
1987118131.4
1988138131.4
1989128131.4
1990139127
1991120127
1992122127
1993127127
2000132135.3
2001129135.3
2002136135.3
2003140135.3
2004138135.3
2006149135.3
2007136135.3
2009122135.3
2010132133
2017134133
First to last qualifying date each year at Waco Dam For each year, a bar from the first to the last day at Waco Dam meeting 30 C (86 F). 1966: 1 April 1966 to 15 October 19661967: 12 March 1967 to 7 October 19671968: 4 May 1968 to 16 October 19681969: 21 May 1969 to 9 November 19691970: 13 April 1970 to 8 October 19701971: 31 January 1971 to 16 October 19711972: 25 March 1972 to 19 October 19721973: 10 May 1973 to 10 October 19731974: 29 March 1974 to 11 October 19741976: 12 May 1976 to 3 October 19761977: 10 May 1977 to 1 November 19771978: 5 April 1978 to 22 October 19781979: 9 April 1979 to 22 October 19791980: 20 February 1980 to 11 November 19801981: 21 April 1981 to 18 October 19811982: 14 March 1982 to 9 October 19821983: 2 March 1983 to 15 November 19831984: 28 March 1984 to 29 October 19841985: 16 April 1985 to 19 October 19851986: 19 February 1986 to 5 October 19861987: 13 April 1987 to 10 October 19871988: 21 April 1988 to 8 November 19881989: 15 March 1989 to 15 November 19891990: 30 April 1990 to 18 October 19901991: 6 March 1991 to 25 October 19911992: 3 May 1992 to 27 October 19921993: 16 May 1993 to 19 October 19932000: 30 March 2000 to 16 October 20002001: 16 April 2001 to 3 November 20012002: 18 April 2002 to 12 November 20022003: 5 April 2003 to 1 November 20032004: 13 May 2004 to 30 October 20042006: 5 April 2006 to 27 October 20062007: 30 April 2007 to 15 November 20072009: 7 March 2009 to 15 October 20092010: 5 May 2010 to 30 September 20102017: 29 April 2017 to 7 November 201719661971197719821987199220032010JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Waco Dam meeting 30 C (86 F).
First to last qualifying date each year at Waco Dam
YearFirst dateLast date
19661966-04-011966-10-15
19671967-03-121967-10-07
19681968-05-041968-10-16
19691969-05-211969-11-09
19701970-04-131970-10-08
19711971-01-311971-10-16
19721972-03-251972-10-19
19731973-05-101973-10-10
19741974-03-291974-10-11
19761976-05-121976-10-03
19771977-05-101977-11-01
19781978-04-051978-10-22
19791979-04-091979-10-22
19801980-02-201980-11-11
19811981-04-211981-10-18
19821982-03-141982-10-09
19831983-03-021983-11-15
19841984-03-281984-10-29
19851985-04-161985-10-19
19861986-02-191986-10-05
19871987-04-131987-10-10
19881988-04-211988-11-08
19891989-03-151989-11-15
19901990-04-301990-10-18
19911991-03-061991-10-25
19921992-05-031992-10-27
19931993-05-161993-10-19
20002000-03-302000-10-16
20012001-04-162001-11-03
20022002-04-182002-11-12
20032003-04-052003-11-01
20042004-05-132004-10-30
20062006-04-052006-10-27
20072007-04-302007-11-15
20092009-03-072009-10-15
20102010-05-052010-09-30
20172017-04-292017-11-07

Every Fixed Threshold

Fixed thresholds at Waco Dam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days371492006134
35 C (95 F): Days3792198039
40 C (104 F): Days151320002
90 F (32.2 C): Days37125200688
100 F (37.8 C): Days334120003
110 F (43.3 C): Days1220002
0 C (32 F): Ice days (max22819891
0 C (32 F): Frost days (min345719786
-10 C (14 F): Days with min13719831
-20 C (-4 F): Days with min1119891
20 C (68 F): Tropical nights (min341291977124
25 C (77 F): Days with min3340196935
10 mm (0.39 in): Days with 10 mm or more rain5438200016
25 mm (0.98 in): Days with 25 mm or more rain541919767
50 mm (1.97 in): Days with 50 mm or more rain50920041
100 mm (3.94 in): Days with 100 mm or more rain13119681
200 mm (7.87 in): Days with 200 mm or more rain10n/a1
10 cm (3.9 in): Days with 10 cm or more snowfall1119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.

Download the Data

  • Data for Waco 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 (2026-10-12).