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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Ulithi Threshold Days by Year

9 fixed thresholds counted per year at Ulithi (FMC00914185): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ulithi Thresholds

  • Ulithi: days with 10 mm (0.39 in) or more of precipitation in 17 years, most in 1971 with 88.
  • Ulithi: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 1971 with 39.
  • Ulithi: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1972 with 16.
  • Ulithi: days with 100 mm (3.94 in) or more of precipitation in 12 years, most in 1960 with 2.
  • 9 fixed thresholds have at least one qualifying day at Ulithi.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Ulithi Days per year at Ulithi with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 335 in 1988. 01002003004001955: 2371967: 2451969: 801970: 2491971: 2821972: 1931988: 3351955196719691970197119721988
Days per year at Ulithi with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 335 in 1988.
Days at or above 30 C (86 F) per year at Ulithi
YearDaysDecade average
1955237237
1967245162.5
196980162.5
1970249241.3
1971282241.3
1972193241.3
1988335335
First to last qualifying date each year at Ulithi For each year, a bar from the first to the last day at Ulithi meeting 30 C (86 F). 1955: 2 January 1955 to 21 December 19551967: 1 January 1967 to 31 December 19671969: 27 April 1969 to 14 November 19691970: 1 January 1970 to 31 December 19701971: 1 January 1971 to 10 December 19711972: 5 March 1972 to 25 December 19721988: 1 January 1988 to 31 December 19881955196719691970197119721988JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ulithi meeting 30 C (86 F).
First to last qualifying date each year at Ulithi
YearFirst dateLast date
19551955-01-021955-12-21
19671967-01-011967-12-31
19691969-04-271969-11-14
19701970-01-011970-12-31
19711971-01-011971-12-10
19721972-03-051972-12-25
19881988-01-011988-12-31

Every Fixed Threshold

Fixed thresholds at Ulithi
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days73351988335
90 F (32.2 C): Days71311988131
20 C (68 F): Tropical nights (min73621971359
25 C (77 F): Days with min7256197011
10 mm (0.39 in): Days with 10 mm or more rain1788197173
25 mm (0.98 in): Days with 25 mm or more rain1739197131
50 mm (1.97 in): Days with 50 mm or more rain161619727
100 mm (3.94 in): Days with 100 mm or more rain12219602
200 mm (7.87 in): Days with 200 mm or more rain20n/a6

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

  • Data for Ulithi 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).