Horseshoe Dam Weather Records (USC00024182)
Record envelope, standing records and threshold days for Horseshoe Dam (USC00024182), Arizona, United States, with 79 years of record.
Key Facts for Horseshoe Dam
- Horseshoe Dam (USC00024182) is a weather station in Arizona, United States at 33.98 latitude and -111.71 longitude, 616 m (2,020 ft) above sea level.
- The station reports from 1948 to 2026, 79 years of record.
- 0 records set at Horseshoe Dam still stand.
- Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Horseshoe Dam set a daily record precipitation of 21.6 mm (0.9 in) on 22 September 2025.
About the Station
- Location: Arizona, United States, 33.98 latitude, -111.71 longitude.
- Elevation: 616 m (2,020 ft).
- Period of record: 1948 to 2026, 79 years.
- Eligible elements: prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | n/a | n/a | n/a | n/a |
| Feb | n/a | n/a | n/a | n/a |
| Mar | n/a | n/a | n/a | n/a |
| Apr | n/a | n/a | n/a | n/a |
| May | n/a | n/a | n/a | n/a |
| Jun | n/a | n/a | n/a | n/a |
| Jul | n/a | n/a | n/a | n/a |
| Aug | n/a | n/a | n/a | n/a |
| Sep | n/a | n/a | n/a | n/a |
| Oct | n/a | n/a | n/a | n/a |
| Nov | n/a | n/a | n/a | n/a |
| Dec | n/a | n/a | n/a | n/a |
Which Years Hold Standing Records
0 standing records| Year set | Standing records |
|---|
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1987-02-24 | Record daily snowfall | Record daily snowfall 10.2 cm (4.0 in) |
Wettest Day of Each Month
Oct: 147.8 mm (5.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 88.9 mm (3.5 in) | 22 January 2010 |
| Feb | 146.1 mm (5.8 in) | 2 February 1985 |
| Mar | 74.2 mm (2.9 in) | 1 March 1978 |
| Apr | 32.8 mm (1.3 in) | 2 April 1999 |
| May | 19.1 mm (0.8 in) | 26 May 1992 |
| Jun | 44.5 mm (1.8 in) | 18 June 1949 |
| Jul | 68.1 mm (2.7 in) | 30 July 1953 |
| Aug | 112.8 mm (4.4 in) | 28 August 1951 |
| Sep | 82.3 mm (3.2 in) | 6 September 1970 |
| Oct | 147.8 mm (5.8 in) | 30 October 1959 |
| Nov | 75.2 mm (3.0 in) | 15 November 1993 |
| Dec | 105.9 mm (4.2 in) | 1 December 2007 |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 22 September 2025 | Horseshoe Dam, US | daily rain | 21.6 mm (0.9 in) | 13.7 mm (0.5 in) | 15 years | 20 of 100 (Routine) |
| 18 July 2022 | Horseshoe Dam, US | daily rain | 12.4 mm (0.5 in) | 3.3 mm (0.13 in) | 63 years | 20 of 100 (Routine) |
| 27 September 2021 | Horseshoe Dam, US | daily rain | 26.9 mm (1.1 in) | 6.3 mm (0.25 in) | 44 years | 25 of 100 (Routine) |
| 26 January 2021 | Horseshoe Dam, US | daily rain | 24.9 mm (1.0 in) | 1.8 mm (0.07 in) | 36 years | 18 of 100 (Routine) |
| 25 November 2019 | Horseshoe Dam, US | daily rain | 48.8 mm (1.9 in) | 15.0 mm (0.6 in) | 33 years | 31 of 100 (Routine) |
| 20 November 2019 | Horseshoe Dam, US | daily rain | 60.2 mm (2.4 in) | 36.3 mm (1.4 in) | 36 years | 51 of 100 (Notable) |
| 24 September 2019 | Horseshoe Dam, US | daily rain | 39.9 mm (1.6 in) | 18.1 mm (0.7 in) | 42 years | 35 of 100 (Notable) |
| 3 August 2016 | Horseshoe Dam, US | daily rain (Tie) | 17.3 mm (0.7 in) | tie | 65 years | 6 of 100 (Routine) |
| 18 May 2016 | Horseshoe Dam, US | daily rain | 1.3 mm (0.05 in) | 1.3 mm (0.05 in) | 67 years | 20 of 100 (Routine) |
| 9 May 2016 | Horseshoe Dam, US | daily rain | 0.8 mm (0.03 in) | 0.8 mm (0.03 in) | 67 years | 20 of 100 (Routine) |
| 5 November 2015 | Horseshoe Dam, US | daily rain | 7.6 mm (0.30 in) | 5.3 mm (0.21 in) | 13 years | 14 of 100 (Routine) |
| 3 March 2015 | Horseshoe Dam, US | daily rain | 20.8 mm (0.8 in) | 3.5 mm (0.14 in) | 32 years | 18 of 100 (Routine) |
| 20 October 2014 | Horseshoe Dam, US | daily rain | 18.3 mm (0.7 in) | 1.8 mm (0.07 in) | 41 years | 19 of 100 (Routine) |
| 20 August 2014 | Horseshoe Dam, US | daily rain | 70.6 mm (2.8 in) | 52.1 mm (2.1 in) | 59 years | 63 of 100 (Major) |
| 8 July 2014 | Horseshoe Dam, US | daily rain | 6.6 mm (0.26 in) | 1.0 mm (0.04 in) | 40 years | 19 of 100 (Routine) |
| 11 March 2013 | Horseshoe Dam, US | daily rain | 53.3 mm (2.1 in) | 29.2 mm (1.1 in) | 48 years | 51 of 100 (Notable) |
| 19 March 2012 | Horseshoe Dam, US | daily rain | 20.8 mm (0.8 in) | 8.6 mm (0.34 in) | 30 years | 20 of 100 (Routine) |
| 13 December 2011 | Horseshoe Dam, US | daily rain | 34.0 mm (1.3 in) | 28.9 mm (1.1 in) | 36 years | 37 of 100 (Notable) |
| 26 July 2011 | Horseshoe Dam, US | daily rain | 19.8 mm (0.8 in) | 2.8 mm (0.11 in) | 32 years | 18 of 100 (Routine) |
| 11 April 2011 | Horseshoe Dam, US | daily rain | 16.5 mm (0.6 in) | 3.8 mm (0.15 in) | 58 years | 20 of 100 (Routine) |
Extremes by Year
1948 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Wettest day (Rx1day) | 147.8 mm (5.8 in) | 1959 | 36.3 mm (1.4 in) | 77 |
| Wettest five days (Rx5day) | 270.5 mm (10.6 in) | 1959 | 53.1 mm (2.1 in) | 76 |
| Longest dry spell (CDD) | 157 days | 1972 | 66 days | 76 |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 50.3 mm (2.0 in) |
| 1949 | 44.5 mm (1.8 in) |
| 1950 | 30.5 mm (1.2 in) |
| 1951 | 112.8 mm (4.4 in) |
| 1952 | 31.0 mm (1.2 in) |
| 1953 | 68.1 mm (2.7 in) |
| 1954 | 30.0 mm (1.2 in) |
| 1955 | 29.2 mm (1.1 in) |
| 1956 | 35.1 mm (1.4 in) |
| 1957 | 46.2 mm (1.8 in) |
| 1958 | 66.3 mm (2.6 in) |
| 1959 | 147.8 mm (5.8 in) |
| 1960 | 17.3 mm (0.7 in) |
| 1961 | 30.0 mm (1.2 in) |
| 1962 | 20.6 mm (0.8 in) |
| 1963 | 30.0 mm (1.2 in) |
| 1964 | 35.1 mm (1.4 in) |
| 1965 | 46.2 mm (1.8 in) |
| 1966 | 51.8 mm (2.0 in) |
| 1967 | 23.6 mm (0.9 in) |
| 1968 | 26.4 mm (1.0 in) |
| 1969 | 39.1 mm (1.5 in) |
| 1970 | 82.3 mm (3.2 in) |
| 1971 | 20.6 mm (0.8 in) |
| 1972 | 77.0 mm (3.0 in) |
| 1973 | 33.0 mm (1.3 in) |
| 1974 | 50.8 mm (2.0 in) |
| 1975 | 19.1 mm (0.8 in) |
| 1976 | 37.6 mm (1.5 in) |
| 1977 | 20.6 mm (0.8 in) |
| 1978 | 88.1 mm (3.5 in) |
| 1979 | 58.4 mm (2.3 in) |
| 1980 | 61.2 mm (2.4 in) |
| 1981 | 41.9 mm (1.6 in) |
| 1982 | 39.9 mm (1.6 in) |
| 1983 | 72.4 mm (2.9 in) |
| 1984 | 25.9 mm (1.0 in) |
| 1985 | 146.1 mm (5.8 in) |
| 1986 | 26.9 mm (1.1 in) |
| 1987 | 39.9 mm (1.6 in) |
| 1988 | 59.2 mm (2.3 in) |
| 1989 | 38.1 mm (1.5 in) |
| 1990 | 30.5 mm (1.2 in) |
| 1991 | 26.2 mm (1.0 in) |
| 1992 | 54.4 mm (2.1 in) |
| 1993 | 75.2 mm (3.0 in) |
| 1994 | 46.5 mm (1.8 in) |
| 1995 | 34.3 mm (1.4 in) |
| 1996 | 38.9 mm (1.5 in) |
| 1997 | 36.3 mm (1.4 in) |
| 1998 | 24.4 mm (1.0 in) |
| 1999 | 32.8 mm (1.3 in) |
| 2000 | 78.7 mm (3.1 in) |
| 2001 | 33.5 mm (1.3 in) |
| 2002 | 25.4 mm (1.0 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 31.0 mm (1.2 in) |
| 2005 | 50.8 mm (2.0 in) |
| 2006 | 32.5 mm (1.3 in) |
| 2007 | 105.9 mm (4.2 in) |
| 2008 | 50.3 mm (2.0 in) |
| 2009 | 49.0 mm (1.9 in) |
| 2010 | 88.9 mm (3.5 in) |
| 2011 | 34.0 mm (1.3 in) |
| 2012 | 20.8 mm (0.8 in) |
| 2013 | 53.3 mm (2.1 in) |
| 2014 | 70.6 mm (2.8 in) |
| 2015 | 20.8 mm (0.8 in) |
| 2016 | 17.3 mm (0.7 in) |
| 2017 | 8.1 mm (0.32 in) |
| 2019 | 60.2 mm (2.4 in) |
| 2020 | 32.8 mm (1.3 in) |
| 2021 | 34.3 mm (1.4 in) |
| 2022 | 12.4 mm (0.5 in) |
| 2023 | 7.6 mm (0.30 in) |
| 2025 | 27.9 mm (1.1 in) |
| 2026 | 1.3 mm (0.05 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 61.7 mm (2.4 in) |
| 1949 | 51.1 mm (2.0 in) |
| 1950 | 36.4 mm (1.4 in) |
| 1951 | 191.5 mm (7.5 in) |
| 1952 | 48.3 mm (1.9 in) |
| 1953 | 70.9 mm (2.8 in) |
| 1954 | 72.6 mm (2.9 in) |
| 1955 | 50.6 mm (2.0 in) |
| 1956 | 54.1 mm (2.1 in) |
| 1957 | 99.1 mm (3.9 in) |
| 1958 | 89.1 mm (3.5 in) |
| 1959 | 270.5 mm (10.6 in) |
| 1960 | 35.0 mm (1.4 in) |
| 1961 | 50.3 mm (2.0 in) |
| 1962 | 43.3 mm (1.7 in) |
| 1963 | 51.9 mm (2.0 in) |
| 1964 | 70.1 mm (2.8 in) |
| 1965 | 81.7 mm (3.2 in) |
| 1966 | 72.7 mm (2.9 in) |
| 1967 | 31.5 mm (1.2 in) |
| 1968 | 52.0 mm (2.0 in) |
| 1969 | 39.1 mm (1.5 in) |
| 1970 | 100.1 mm (3.9 in) |
| 1971 | 25.2 mm (1.0 in) |
| 1972 | 101.1 mm (4.0 in) |
| 1973 | 59.0 mm (2.3 in) |
| 1974 | 64.0 mm (2.5 in) |
| 1975 | 39.8 mm (1.6 in) |
| 1976 | 74.1 mm (2.9 in) |
| 1977 | 46.5 mm (1.8 in) |
| 1978 | 153.2 mm (6.0 in) |
| 1979 | 94.0 mm (3.7 in) |
| 1980 | 109.2 mm (4.3 in) |
| 1981 | 57.9 mm (2.3 in) |
| 1982 | 60.7 mm (2.4 in) |
| 1983 | 100.8 mm (4.0 in) |
| 1984 | 49.8 mm (2.0 in) |
| 1985 | 154.5 mm (6.1 in) |
| 1986 | 52.6 mm (2.1 in) |
| 1987 | 66.5 mm (2.6 in) |
| 1988 | 61.0 mm (2.4 in) |
| 1989 | 48.8 mm (1.9 in) |
| 1990 | 33.0 mm (1.3 in) |
| 1991 | 41.2 mm (1.6 in) |
| 1992 | 91.4 mm (3.6 in) |
| 1993 | 133.9 mm (5.3 in) |
| 1994 | 46.5 mm (1.8 in) |
| 1995 | 51.4 mm (2.0 in) |
| 1996 | 43.5 mm (1.7 in) |
| 1997 | 53.8 mm (2.1 in) |
| 1998 | 44.4 mm (1.7 in) |
| 1999 | 70.3 mm (2.8 in) |
| 2000 | 107.1 mm (4.2 in) |
| 2001 | 38.6 mm (1.5 in) |
| 2002 | 43.7 mm (1.7 in) |
| 2003 | 92.5 mm (3.6 in) |
| 2004 | 52.8 mm (2.1 in) |
| 2005 | 83.8 mm (3.3 in) |
| 2006 | 32.5 mm (1.3 in) |
| 2007 | 105.9 mm (4.2 in) |
| 2008 | 69.9 mm (2.8 in) |
| 2009 | 52.0 mm (2.0 in) |
| 2010 | 169.9 mm (6.7 in) |
| 2011 | 49.0 mm (1.9 in) |
| 2012 | 20.8 mm (0.8 in) |
| 2013 | 53.3 mm (2.1 in) |
| 2014 | 18.3 mm (0.7 in) |
| 2015 | 0.0 mm (0.00 in) |
| 2016 | 8.9 mm (0.35 in) |
| 2017 | n/a |
| 2019 | 65.3 mm (2.6 in) |
| 2020 | 72.1 mm (2.8 in) |
| 2021 | 34.3 mm (1.4 in) |
| 2022 | 12.4 mm (0.5 in) |
| 2023 | 0.0 mm (0.00 in) |
| 2025 | 0.0 mm (0.00 in) |
| 2026 | 1.3 mm (0.05 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 52 days |
| 1949 | 68 days |
| 1950 | 53 days |
| 1951 | 61 days |
| 1952 | 66 days |
| 1953 | 80 days |
| 1954 | 63 days |
| 1955 | 41 days |
| 1956 | 69 days |
| 1957 | 40 days |
| 1958 | 40 days |
| 1959 | 63 days |
| 1960 | 63 days |
| 1961 | 70 days |
| 1962 | 62 days |
| 1963 | 97 days |
| 1964 | 71 days |
| 1965 | 41 days |
| 1966 | 64 days |
| 1967 | 64 days |
| 1968 | 57 days |
| 1969 | 68 days |
| 1970 | 74 days |
| 1971 | 54 days |
| 1972 | 157 days |
| 1973 | 42 days |
| 1974 | 96 days |
| 1975 | 84 days |
| 1976 | 50 days |
| 1977 | 51 days |
| 1978 | 56 days |
| 1979 | 42 days |
| 1980 | 54 days |
| 1981 | 55 days |
| 1982 | 62 days |
| 1983 | 68 days |
| 1984 | 81 days |
| 1985 | 73 days |
| 1986 | 84 days |
| 1987 | 61 days |
| 1988 | 66 days |
| 1989 | 54 days |
| 1990 | 33 days |
| 1991 | 114 days |
| 1992 | 60 days |
| 1993 | 79 days |
| 1994 | 30 days |
| 1995 | 85 days |
| 1996 | 116 days |
| 1997 | 43 days |
| 1998 | 74 days |
| 1999 | 102 days |
| 2000 | 78 days |
| 2001 | 48 days |
| 2002 | 94 days |
| 2003 | 96 days |
| 2004 | 105 days |
| 2005 | 84 days |
| 2006 | 71 days |
| 2007 | 114 days |
| 2008 | 93 days |
| 2009 | 89 days |
| 2010 | 82 days |
| 2011 | 105 days |
| 2012 | 104 days |
| 2013 | 81 days |
| 2014 | 61 days |
| 2015 | 25 days |
| 2016 | 47 days |
| 2017 | n/a |
| 2019 | 37 days |
| 2020 | 140 days |
| 2021 | 105 days |
| 2022 | 86 days |
| 2023 | 33 days |
| 2025 | 28 days |
| 2026 | 31 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Rainfall Return Levels
63 years, 1949 to 2020A day with at least 39.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 170.1 mm (6.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 39.4 mm (1.6 in) | |
| 5 years | 60.5 mm (2.4 in) | |
| 10 years | 78.8 mm (3.1 in) | |
| 25 years | 108.5 mm (4.3 in) | |
| 50 years | 136.3 mm (5.4 in) | |
| 100 years | 170.1 mm (6.7 in) | Longer than the 63 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 63 years of values from 1949 to 2020.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 147.8 mm (5.8 in) in 1959; 146.1 mm (5.8 in) in 1985; 112.8 mm (4.4 in) in 1951.
Download the Data
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).