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

Halawa Valley 542.9 Threshold Days by Year (USC00510961)

4 fixed thresholds counted per year at Halawa Valley 542.9 (USC00510961): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Halawa Valley 542.9 Thresholds

  • Halawa Valley 542.9: days with 10 mm (0.39 in) or more of precipitation in 10 years, most in 1905 with 58.
  • Halawa Valley 542.9: days with 25 mm (0.98 in) or more of precipitation in 10 years, most in 1987 with 14.
  • Halawa Valley 542.9: days with 50 mm (1.97 in) or more of precipitation in 9 years, most in 1988 with 6.
  • Halawa Valley 542.9: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1988 with 3.
  • 4 fixed thresholds have at least one qualifying day at Halawa Valley 542.9.
10 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Halawa Valley 542.9 Days per year at Halawa Valley 542.9 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 58 in 1905. 02040601905: 581931: 161932: 141933: 71984: 111986: 251987: 281988: 201991: 231994: 241905193119321933198419861987198819911994
Days per year at Halawa Valley 542.9 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 58 in 1905.
Days with 10 mm (0.39 in) or more of precipitation per year at Halawa Valley 542.9
YearDaysDecade average
19055858
19311612.3
19321412.3
1933712.3
19841121
19862521
19872821
19882021
19912323.5
19942423.5
First to last qualifying date each year at Halawa Valley 542.9 For each year, a bar from the first to the last day at Halawa Valley 542.9 meeting 10 mm (0.39 in). 1905: 2 January 1905 to 30 December 19051931: 18 January 1931 to 14 December 19311932: 20 January 1932 to 13 December 19321933: 9 February 1933 to 23 December 19331984: 15 January 1984 to 26 December 19841986: 18 January 1986 to 28 December 19861987: 13 January 1987 to 26 December 19871988: 1 January 1988 to 17 December 19881991: 27 January 1991 to 23 December 19911994: 13 January 1994 to 10 December 199419051932198419871991JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Halawa Valley 542.9 meeting 10 mm (0.39 in).
First to last qualifying date each year at Halawa Valley 542.9
YearFirst dateLast date
19051905-01-021905-12-30
19311931-01-181931-12-14
19321932-01-201932-12-13
19331933-02-091933-12-23
19841984-01-151984-12-26
19861986-01-181986-12-28
19871987-01-131987-12-26
19881988-01-011988-12-17
19911991-01-271991-12-23
19941994-01-131994-12-10

Every Fixed Threshold

Fixed thresholds at Halawa Valley 542.9
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1058190524
25 mm (0.98 in): Days with 25 mm or more rain101419877
50 mm (1.97 in): Days with 50 mm or more rain9619882
100 mm (3.94 in): Days with 100 mm or more rain4319883

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.

Download the Data

  • Data for Halawa Valley 542.9 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).