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Built 2026-10-19 (19 October 2026)

Arecibo Obsy Threshold Days by Year (RQC00660426)

8 fixed thresholds counted per year at Arecibo Obsy (RQC00660426): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arecibo Obsy Thresholds

  • Arecibo Obsy: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 2010 with 86.
  • Arecibo Obsy: days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1998 with 37.
  • Arecibo Obsy: days with 50 mm (1.97 in) or more of precipitation in 40 years, most in 1981 with 12.
  • Arecibo Obsy: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 1994 with 268.
  • 8 fixed thresholds have at least one qualifying day at Arecibo Obsy.
37 years with a qualifying day
Days at or above 30 C (86 F) per year at Arecibo Obsy Days per year at Arecibo Obsy with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 268 in 1994. 01002003001980: 2391981: 2031982: 1721983: 2251984: 1731985: 1321986: 1691987: 2331988: 2081989: 1671990: 2001991: 2121994: 2681996: 2011997: 2021998: 1931999: 1392000: 1352001: 1702002: 1612003: 1652004: 1172005: 1602006: 1352007: 1412008: 992009: 722010: 862011: 532014: 962020: 1622021: 1452022: 1252023: 1852024: 1812025: 1532026: 1411980198419881994199920032007201120222026
Days per year at Arecibo Obsy with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 268 in 1994.
Days at or above 30 C (86 F) per year at Arecibo Obsy
YearDaysDecade average
1980239192.1
1981203192.1
1982172192.1
1983225192.1
1984173192.1
1985132192.1
1986169192.1
1987233192.1
1988208192.1
1989167192.1
1990200202.1
1991212202.1
1994268202.1
1996201202.1
1997202202.1
1998193202.1
1999139202.1
2000135135.5
2001170135.5
2002161135.5
2003165135.5
2004117135.5
2005160135.5
2006135135.5
2007141135.5
200899135.5
200972135.5
20108678.3
20115378.3
20149678.3
2020162156
2021145156
2022125156
2023185156
2024181156
2025153156
2026141156
First to last qualifying date each year at Arecibo Obsy For each year, a bar from the first to the last day at Arecibo Obsy meeting 30 C (86 F). 1980: 2 February 1980 to 29 December 19801981: 6 January 1981 to 26 December 19811982: 2 January 1982 to 14 December 19821983: 13 January 1983 to 28 December 19831984: 3 January 1984 to 23 December 19841985: 8 January 1985 to 26 December 19851986: 5 January 1986 to 30 December 19861987: 1 January 1987 to 20 December 19871988: 9 January 1988 to 20 December 19881989: 2 January 1989 to 27 December 19891990: 1 January 1990 to 9 December 19901991: 2 January 1991 to 31 December 19911994: 1 January 1994 to 31 December 19941996: 1 January 1996 to 10 December 19961997: 6 January 1997 to 31 December 19971998: 1 January 1998 to 26 November 19981999: 27 March 1999 to 13 November 19992000: 29 March 2000 to 10 December 20002001: 2 January 2001 to 31 December 20012002: 19 February 2002 to 30 December 20022003: 4 January 2003 to 13 December 20032004: 2 February 2004 to 18 October 20042005: 28 February 2005 to 3 November 20052006: 13 February 2006 to 28 December 20062007: 29 January 2007 to 16 November 20072008: 31 January 2008 to 13 December 20082009: 30 January 2009 to 21 December 20092010: 17 February 2010 to 11 November 20102011: 2 April 2011 to 16 October 20112014: 18 March 2014 to 9 November 20142020: 7 February 2020 to 10 December 20202021: 17 January 2021 to 23 December 20212022: 14 April 2022 to 28 December 20222023: 21 March 2023 to 24 December 20232024: 11 January 2024 to 12 December 20242025: 19 February 2025 to 15 December 20252026: 3 February 2026 to 15 October 202619801985199019982003200820202025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Arecibo Obsy meeting 30 C (86 F).
First to last qualifying date each year at Arecibo Obsy
YearFirst dateLast date
19801980-02-021980-12-29
19811981-01-061981-12-26
19821982-01-021982-12-14
19831983-01-131983-12-28
19841984-01-031984-12-23
19851985-01-081985-12-26
19861986-01-051986-12-30
19871987-01-011987-12-20
19881988-01-091988-12-20
19891989-01-021989-12-27
19901990-01-011990-12-09
19911991-01-021991-12-31
19941994-01-011994-12-31
19961996-01-011996-12-10
19971997-01-061997-12-31
19981998-01-011998-11-26
19991999-03-271999-11-13
20002000-03-292000-12-10
20012001-01-022001-12-31
20022002-02-192002-12-30
20032003-01-042003-12-13
20042004-02-022004-10-18
20052005-02-282005-11-03
20062006-02-132006-12-28
20072007-01-292007-11-16
20082008-01-312008-12-13
20092009-01-302009-12-21
20102010-02-172010-11-11
20112011-04-022011-10-16
20142014-03-182014-11-09
20202020-02-072020-12-10
20212021-01-172021-12-23
20222022-04-142022-12-28
20232023-03-212023-12-24
20242024-01-112024-12-12
20252025-02-192025-12-15
20262026-02-032026-10-15

Every Fixed Threshold

Fixed thresholds at Arecibo Obsy
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days372681994141
35 C (95 F): Days81420231
90 F (32.2 C): Days37111202347
20 C (68 F): Tropical nights (min322122005121
10 mm (0.39 in): Days with 10 mm or more rain4086201031
25 mm (0.98 in): Days with 25 mm or more rain4037199814
50 mm (1.97 in): Days with 50 mm or more rain401219811
100 mm (3.94 in): Days with 100 mm or more rain24319881

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1980.

Download the Data

  • Data for Arecibo Obsy 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 (2026-10-17).