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Built 2026-10-17 (17 October 2026)

Wahiawa Dam 863 Threshold Days by Year

4 fixed thresholds counted per year at Wahiawa Dam 863 (USC00518945): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wahiawa Dam 863 Thresholds

  • Wahiawa Dam 863: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1951 with 42.
  • Wahiawa Dam 863: days with 25 mm (0.98 in) or more of precipitation in 20 years, most in 1951 with 22.
  • Wahiawa Dam 863: days with 50 mm (1.97 in) or more of precipitation in 19 years, most in 1951 with 10.
  • Wahiawa Dam 863: days with 100 mm (3.94 in) or more of precipitation in 11 years, most in 1955 with 5.
  • 4 fixed thresholds have at least one qualifying day at Wahiawa Dam 863.
21 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Wahiawa Dam 863 Days per year at Wahiawa Dam 863 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1951. 02040601941: 61942: 251943: 201944: 251945: 171946: 191947: 191948: 231949: 181950: 301951: 421952: 161953: 141954: 221955: 251956: 221957: 241959: 171960: 211961: 211962: 211941194419471950195319561960
Days per year at Wahiawa Dam 863 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1951.
Days with 10 mm (0.39 in) or more of precipitation per year at Wahiawa Dam 863
YearDaysDecade average
1941619.1
19422519.1
19432019.1
19442519.1
19451719.1
19461919.1
19471919.1
19482319.1
19491819.1
19503023.6
19514223.6
19521623.6
19531423.6
19542223.6
19552523.6
19562223.6
19572423.6
19591723.6
19602121
19612121
19622121
First to last qualifying date each year at Wahiawa Dam 863 For each year, a bar from the first to the last day at Wahiawa Dam 863 meeting 10 mm (0.39 in). 1941: 7 September 1941 to 3 November 19411942: 26 January 1942 to 21 December 19421943: 2 January 1943 to 27 December 19431944: 16 January 1944 to 28 December 19441945: 27 February 1945 to 10 December 19451946: 5 January 1946 to 23 December 19461947: 16 January 1947 to 20 December 19471948: 17 January 1948 to 24 December 19481949: 6 January 1949 to 19 December 19491950: 6 January 1950 to 29 December 19501951: 1 January 1951 to 31 December 19511952: 12 January 1952 to 30 November 19521953: 7 January 1953 to 27 December 19531954: 1 January 1954 to 30 December 19541955: 21 January 1955 to 31 December 19551956: 1 January 1956 to 7 December 19561957: 15 January 1957 to 2 December 19571959: 3 January 1959 to 17 December 19591960: 10 January 1960 to 19 December 19601961: 17 January 1961 to 7 December 19611962: 17 January 1962 to 23 December 19621941194419471950195319561960JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wahiawa Dam 863 meeting 10 mm (0.39 in).
First to last qualifying date each year at Wahiawa Dam 863
YearFirst dateLast date
19411941-09-071941-11-03
19421942-01-261942-12-21
19431943-01-021943-12-27
19441944-01-161944-12-28
19451945-02-271945-12-10
19461946-01-051946-12-23
19471947-01-161947-12-20
19481948-01-171948-12-24
19491949-01-061949-12-19
19501950-01-061950-12-29
19511951-01-011951-12-31
19521952-01-121952-11-30
19531953-01-071953-12-27
19541954-01-011954-12-30
19551955-01-211955-12-31
19561956-01-011956-12-07
19571957-01-151957-12-02
19591959-01-031959-12-17
19601960-01-101960-12-19
19611961-01-171961-12-07
19621962-01-171962-12-23

Every Fixed Threshold

Fixed thresholds at Wahiawa Dam 863
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2142195121
25 mm (0.98 in): Days with 25 mm or more rain2022195110
50 mm (1.97 in): Days with 50 mm or more rain191019513
100 mm (3.94 in): Days with 100 mm or more rain11519551

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.

Download the Data

  • Data for Wahiawa Dam 863 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

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