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

Ko Samui Threshold Days by Year (TH000048550)

11 fixed thresholds counted per year at Ko Samui (TH000048550): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ko Samui Thresholds

  • Ko Samui: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 2012 with 289.
  • Ko Samui: days with a maximum temperature at or above 90 F (32.2 C) in 31 years, most in 2016 with 157.
  • Ko Samui: days with a maximum temperature at or above 35 C (95 F) in 28 years, most in 2021 with 30.
  • Ko Samui: days with 10 mm (0.39 in) or more of precipitation in 17 years, most in 1998 with 59.
  • 11 fixed thresholds have at least one qualifying day at Ko Samui.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Ko Samui Days per year at Ko Samui with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 289 in 2012. 01002003001984: 2421986: 2151989: 2271990: 2411991: 2571992: 1921993: 2081994: 2061995: 1951996: 1851997: 2471998: 2541999: 2272000: 2232001: 2242002: 2322003: 2312004: 2052006: 2702007: 2602008: 2352009: 2822010: 2632011: 2372012: 2892013: 2472016: 2712017: 2302020: 2442021: 2352025: 13619841991199519992003200820122020
Days per year at Ko Samui with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 289 in 2012.
Days at or above 30 C (86 F) per year at Ko Samui
YearDaysDecade average
1984242228
1986215228
1989227228
1990241221.2
1991257221.2
1992192221.2
1993208221.2
1994206221.2
1995195221.2
1996185221.2
1997247221.2
1998254221.2
1999227221.2
2000223240.2
2001224240.2
2002232240.2
2003231240.2
2004205240.2
2006270240.2
2007260240.2
2008235240.2
2009282240.2
2010263256.2
2011237256.2
2012289256.2
2013247256.2
2016271256.2
2017230256.2
2020244205
2021235205
2025136205
First to last qualifying date each year at Ko Samui For each year, a bar from the first to the last day at Ko Samui meeting 30 C (86 F). 1984: 18 January 1984 to 28 December 19841986: 4 January 1986 to 26 December 19861989: 16 January 1989 to 24 December 19891990: 8 January 1990 to 26 December 19901991: 1 January 1991 to 23 December 19911992: 17 February 1992 to 21 December 19921993: 10 January 1993 to 14 December 19931994: 11 February 1994 to 12 December 19941995: 14 January 1995 to 13 December 19951996: 17 February 1996 to 22 December 19961997: 3 February 1997 to 29 December 19971998: 7 January 1998 to 31 December 19981999: 1 January 1999 to 17 December 19992000: 15 January 2000 to 28 December 20002001: 11 January 2001 to 20 December 20012002: 19 February 2002 to 27 December 20022003: 10 January 2003 to 9 December 20032004: 29 February 2004 to 18 December 20042006: 2 January 2006 to 31 December 20062007: 1 January 2007 to 30 December 20072008: 10 January 2008 to 26 December 20082009: 7 January 2009 to 29 December 20092010: 1 January 2010 to 24 December 20102011: 18 February 2011 to 31 December 20112012: 7 January 2012 to 30 December 20122013: 1 January 2013 to 16 December 20132016: 2 January 2016 to 31 December 20162017: 15 January 2017 to 24 December 20172020: 10 January 2020 to 30 December 20202021: 4 January 2021 to 29 December 20212025: 1 January 2025 to 23 August 202519841991199519992003200820122020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ko Samui meeting 30 C (86 F).
First to last qualifying date each year at Ko Samui
YearFirst dateLast date
19841984-01-181984-12-28
19861986-01-041986-12-26
19891989-01-161989-12-24
19901990-01-081990-12-26
19911991-01-011991-12-23
19921992-02-171992-12-21
19931993-01-101993-12-14
19941994-02-111994-12-12
19951995-01-141995-12-13
19961996-02-171996-12-22
19971997-02-031997-12-29
19981998-01-071998-12-31
19991999-01-011999-12-17
20002000-01-152000-12-28
20012001-01-112001-12-20
20022002-02-192002-12-27
20032003-01-102003-12-09
20042004-02-292004-12-18
20062006-01-022006-12-31
20072007-01-012007-12-30
20082008-01-102008-12-26
20092009-01-072009-12-29
20102010-01-012010-12-24
20112011-02-182011-12-31
20122012-01-072012-12-30
20132013-01-012013-12-16
20162016-01-022016-12-31
20172017-01-152017-12-24
20202020-01-102020-12-30
20212021-01-042021-12-29
20252025-01-012025-08-23

Every Fixed Threshold

Fixed thresholds at Ko Samui
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days312892012136
35 C (95 F): Days2830202150
90 F (32.2 C): Days311572016106
100 F (37.8 C): Days7319901
20 C (68 F): Tropical nights (min43392016202
25 C (77 F): Days with min41172016149
10 mm (0.39 in): Days with 10 mm or more rain1759199823
25 mm (0.98 in): Days with 25 mm or more rain172719966
50 mm (1.97 in): Days with 50 mm or more rain171219962
100 mm (3.94 in): Days with 100 mm or more rain13319921
200 mm (7.87 in): Days with 200 mm or more rain3119791

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1984.

Download the Data

  • Data for Ko Samui 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).