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Data as of 2026-10-15
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Built 2026-10-17 (17 October 2026)

Formosa Threshold Days by Year

5 fixed thresholds counted per year at Formosa (ARM00087162): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Formosa Thresholds

  • 5 fixed thresholds have at least one qualifying day at Formosa.
6 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Formosa Days per year at Formosa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. 02040601979: 371980: 321981: 351997: 301998: 492004: 30197919801981199719982004
Days per year at Formosa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line.
Days with 10 mm (0.39 in) or more of precipitation per year at Formosa
YearDaysDecade average
19793737
19803233.5
19813533.5
19973039.5
19984939.5
20043030
First to last qualifying date each year at Formosa For each year, a bar from the first to the last day at Formosa meeting 10 mm (0.39 in). 1979: 4 January 1979 to 31 December 19791980: 7 January 1980 to 26 December 19801981: 1 January 1981 to 27 December 19811997: 9 January 1997 to 31 December 19971998: 1 January 1998 to 29 December 19982004: 5 February 2004 to 20 December 2004197919801981199719982004JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Formosa meeting 10 mm (0.39 in).
First to last qualifying date each year at Formosa
YearFirst dateLast date
19791979-01-041979-12-31
19801980-01-071980-12-26
19811981-01-011981-12-27
19971997-01-091997-12-31
19981998-01-011998-12-29
20042004-02-052004-12-20

Every Fixed Threshold

Fixed thresholds at Formosa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain60n/a30
25 mm (0.98 in): Days with 25 mm or more rain60n/a17
50 mm (1.97 in): Days with 50 mm or more rain60n/a8
100 mm (3.94 in): Days with 100 mm or more rain30n/a2
200 mm (7.87 in): Days with 200 mm or more rain20n/a1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1979.

Download the Data

  • Data for Formosa 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 (2026-10-15).