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

Horseshoe Dam Threshold Days by Year (USC00024182)

5 fixed thresholds counted per year at Horseshoe Dam (USC00024182): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Horseshoe Dam Thresholds

  • Horseshoe Dam: days with 10 mm (0.39 in) or more of precipitation in 64 years, most in 1992 with 25.
  • Horseshoe Dam: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 1965 with 10.
  • Horseshoe Dam: days with 50 mm (1.97 in) or more of precipitation in 21 years, most in 1978 with 4.
  • Horseshoe Dam: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1959 with 2.
  • 5 fixed thresholds have at least one qualifying day at Horseshoe Dam.
64 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Horseshoe Dam Days per year at Horseshoe Dam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 25 in 1992. 01020301949: 171950: 61951: 161952: 181953: 41954: 111955: 121956: 61957: 151958: 141959: 181960: 81961: 71962: 91963: 151964: 111965: 231966: 121967: 81968: 141969: 101970: 101971: 61972: 121973: 121974: 91975: 81976: 141977: 81978: 221979: 121981: 151982: 171983: 181984: 121985: 161986: 171987: 131988: 101989: 81990: 101991: 141992: 251993: 171994: 91995: 101996: 61997: 51998: 141999: 92000: 72001: 102002: 32003: 122004: 132005: 162006: 72007: 72008: 102009: 72010: 112011: 72020: 52025: 21949195619631970197719851992199920062025
Days per year at Horseshoe Dam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 25 in 1992.
Days with 10 mm (0.39 in) or more of precipitation per year at Horseshoe Dam
YearDaysDecade average
19491717
1950612
19511612
19521812
1953412
19541112
19551212
1956612
19571512
19581412
19591812
1960811.7
1961711.7
1962911.7
19631511.7
19641111.7
19652311.7
19661211.7
1967811.7
19681411.7
19691011.7
19701011.3
1971611.3
19721211.3
19731211.3
1974911.3
1975811.3
19761411.3
1977811.3
19782211.3
19791211.3
19811514
19821714
19831814
19841214
19851614
19861714
19871314
19881014
1989814
19901011.9
19911411.9
19922511.9
19931711.9
1994911.9
19951011.9
1996611.9
1997511.9
19981411.9
1999911.9
200079.2
2001109.2
200239.2
2003129.2
2004139.2
2005169.2
200679.2
200779.2
2008109.2
200979.2
2010119
201179
202053.5
202523.5
First to last qualifying date each year at Horseshoe Dam For each year, a bar from the first to the last day at Horseshoe Dam meeting 10 mm (0.39 in). 1949: 10 January 1949 to 20 December 19491950: 30 January 1950 to 12 August 19501951: 30 January 1951 to 31 December 19511952: 18 January 1952 to 21 December 19521953: 1 March 1953 to 11 August 19531954: 13 January 1954 to 23 September 19541955: 4 January 1955 to 2 December 19551956: 9 February 1956 to 24 October 19561957: 8 January 1957 to 16 December 19571958: 4 February 1958 to 12 November 19581959: 9 February 1959 to 26 December 19591960: 1 January 1960 to 7 November 19601961: 29 March 1961 to 16 December 19611962: 22 January 1962 to 1 December 19621963: 3 January 1963 to 22 November 19631964: 24 March 1964 to 19 December 19641965: 1 January 1965 to 30 December 19651966: 8 February 1966 to 27 December 19661967: 24 January 1967 to 27 November 19671968: 27 January 1968 to 15 November 19681969: 14 January 1969 to 11 November 19691970: 2 March 1970 to 21 December 19701971: 15 April 1971 to 24 October 19711972: 21 June 1972 to 28 December 19721973: 12 February 1973 to 19 November 19731974: 5 January 1974 to 5 December 19741975: 14 February 1975 to 21 December 19751976: 4 February 1976 to 31 December 19761977: 3 January 1977 to 5 October 19771978: 11 January 1978 to 19 December 19781979: 17 January 1979 to 13 August 19791981: 12 January 1981 to 29 November 19811982: 3 January 1982 to 22 December 19821983: 27 January 1983 to 20 November 19831984: 29 April 1984 to 27 December 19841985: 26 January 1985 to 12 December 19851986: 8 February 1986 to 7 December 19861987: 30 January 1987 to 17 December 19871988: 17 January 1988 to 15 October 19881989: 5 January 1989 to 29 December 19891990: 18 January 1990 to 27 November 19901991: 4 January 1991 to 20 December 19911992: 4 January 1992 to 29 December 19921993: 7 January 1993 to 15 November 19931994: 8 February 1994 to 6 December 19941995: 15 February 1995 to 7 November 19951996: 1 February 1996 to 16 September 19961997: 13 January 1997 to 4 April 19971998: 11 January 1998 to 29 November 19981999: 5 February 1999 to 15 September 19992000: 6 March 2000 to 30 October 20002001: 10 January 2001 to 5 December 20012002: 15 July 2002 to 30 November 20022003: 8 January 2003 to 13 November 20032004: 23 February 2004 to 30 December 20042005: 4 January 2005 to 23 August 20052006: 13 March 2006 to 9 October 20062007: 1 February 2007 to 12 December 20072008: 27 January 2008 to 2 September 20082009: 9 February 2009 to 8 December 20092010: 19 January 2010 to 31 December 20102011: 21 February 2011 to 19 December 20112020: 11 February 2020 to 31 August 20202025: 22 September 2025 to 29 September 202519491957196519731982199019982006JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Horseshoe Dam meeting 10 mm (0.39 in).
First to last qualifying date each year at Horseshoe Dam
YearFirst dateLast date
19491949-01-101949-12-20
19501950-01-301950-08-12
19511951-01-301951-12-31
19521952-01-181952-12-21
19531953-03-011953-08-11
19541954-01-131954-09-23
19551955-01-041955-12-02
19561956-02-091956-10-24
19571957-01-081957-12-16
19581958-02-041958-11-12
19591959-02-091959-12-26
19601960-01-011960-11-07
19611961-03-291961-12-16
19621962-01-221962-12-01
19631963-01-031963-11-22
19641964-03-241964-12-19
19651965-01-011965-12-30
19661966-02-081966-12-27
19671967-01-241967-11-27
19681968-01-271968-11-15
19691969-01-141969-11-11
19701970-03-021970-12-21
19711971-04-151971-10-24
19721972-06-211972-12-28
19731973-02-121973-11-19
19741974-01-051974-12-05
19751975-02-141975-12-21
19761976-02-041976-12-31
19771977-01-031977-10-05
19781978-01-111978-12-19
19791979-01-171979-08-13
19811981-01-121981-11-29
19821982-01-031982-12-22
19831983-01-271983-11-20
19841984-04-291984-12-27
19851985-01-261985-12-12
19861986-02-081986-12-07
19871987-01-301987-12-17
19881988-01-171988-10-15
19891989-01-051989-12-29
19901990-01-181990-11-27
19911991-01-041991-12-20
19921992-01-041992-12-29
19931993-01-071993-11-15
19941994-02-081994-12-06
19951995-02-151995-11-07
19961996-02-011996-09-16
19971997-01-131997-04-04
19981998-01-111998-11-29
19991999-02-051999-09-15
20002000-03-062000-10-30
20012001-01-102001-12-05
20022002-07-152002-11-30
20032003-01-082003-11-13
20042004-02-232004-12-30
20052005-01-042005-08-23
20062006-03-132006-10-09
20072007-02-012007-12-12
20082008-01-272008-09-02
20092009-02-092009-12-08
20102010-01-192010-12-31
20112011-02-212011-12-19
20202020-02-112020-08-31
20252025-09-222025-09-29

Every Fixed Threshold

Fixed thresholds at Horseshoe Dam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain642519922
25 mm (0.98 in): Days with 25 mm or more rain571019651
50 mm (1.97 in): Days with 50 mm or more rain21419781
100 mm (3.94 in): Days with 100 mm or more rain4219591
10 cm (3.9 in): Days with 10 cm or more snowfall1119871

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Horseshoe 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 (2025-12-31).