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

Hyesan Threshold Days by Year (KNM00047016)

10 fixed thresholds counted per year at Hyesan (KNM00047016): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hyesan Thresholds

  • Hyesan: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2020 with 34.
  • Hyesan: days with a maximum temperature at or below 0 C (32 F) in 29 years, most in 2012 with 113.
  • Hyesan: days with a maximum temperature at or above 90 F (32.2 C) in 20 years, most in 1997 with 18.
  • Hyesan: days with a maximum temperature at or above 35 C (95 F) in 6 years, most in 1988 with 4.
  • 10 fixed thresholds have at least one qualifying day at Hyesan.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Hyesan Days per year at Hyesan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 34 in 2020. 0102030401970: 141978: 231979: 111980: 231981: 171983: 161985: 61986: 61987: 31988: 241989: 81990: 81991: 71992: 41993: 61994: 281995: 101996: 121997: 332001: 202008: 282009: 72010: 152011: 122012: 132013: 172014: 122016: 242020: 342025: 31970198019851988199119941997200920122016
Days per year at Hyesan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 34 in 2020.
Days at or above 30 C (86 F) per year at Hyesan
YearDaysDecade average
19701416
19782316
19791116
19802312.9
19811712.9
19831612.9
1985612.9
1986612.9
1987312.9
19882412.9
1989812.9
1990813.5
1991713.5
1992413.5
1993613.5
19942813.5
19951013.5
19961213.5
19973313.5
20012018.3
20082818.3
2009718.3
20101515.5
20111215.5
20121315.5
20131715.5
20141215.5
20162415.5
20203418.5
2025318.5
First to last qualifying date each year at Hyesan For each year, a bar from the first to the last day at Hyesan meeting 30 C (86 F). 1970: 9 May 1970 to 24 August 19701978: 8 June 1978 to 27 August 19781979: 28 May 1979 to 14 August 19791980: 23 May 1980 to 6 August 19801981: 23 May 1981 to 14 August 19811983: 30 May 1983 to 16 August 19831985: 23 May 1985 to 19 August 19851986: 11 June 1986 to 17 August 19861987: 5 June 1987 to 1 August 19871988: 26 June 1988 to 19 August 19881989: 23 June 1989 to 15 August 19891990: 9 July 1990 to 8 August 19901991: 20 May 1991 to 25 August 19911992: 6 July 1992 to 5 August 19921993: 5 July 1993 to 26 July 19931994: 15 June 1994 to 4 September 19941995: 17 June 1995 to 12 August 19951996: 29 May 1996 to 19 August 19961997: 14 June 1997 to 26 August 19972001: 20 May 2001 to 20 August 20012008: 15 June 2008 to 12 August 20082009: 20 May 2009 to 17 August 20092010: 5 June 2010 to 19 August 20102011: 19 June 2011 to 12 August 20112012: 28 June 2012 to 27 August 20122013: 8 May 2013 to 12 August 20132014: 31 May 2014 to 4 August 20142016: 21 May 2016 to 16 August 20162020: 2 May 2020 to 28 August 20202025: 13 June 2025 to 23 August 202519701981198719911995200820122020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hyesan meeting 30 C (86 F).
First to last qualifying date each year at Hyesan
YearFirst dateLast date
19701970-05-091970-08-24
19781978-06-081978-08-27
19791979-05-281979-08-14
19801980-05-231980-08-06
19811981-05-231981-08-14
19831983-05-301983-08-16
19851985-05-231985-08-19
19861986-06-111986-08-17
19871987-06-051987-08-01
19881988-06-261988-08-19
19891989-06-231989-08-15
19901990-07-091990-08-08
19911991-05-201991-08-25
19921992-07-061992-08-05
19931993-07-051993-07-26
19941994-06-151994-09-04
19951995-06-171995-08-12
19961996-05-291996-08-19
19971997-06-141997-08-26
20012001-05-202001-08-20
20082008-06-152008-08-12
20092009-05-202009-08-17
20102010-06-052010-08-19
20112011-06-192011-08-12
20122012-06-282012-08-27
20132013-05-082013-08-12
20142014-05-312014-08-04
20162016-05-212016-08-16
20202020-05-022020-08-28
20252025-06-132025-08-23

Every Fixed Threshold

Fixed thresholds at Hyesan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days303420203
35 C (95 F): Days6419882
90 F (32.2 C): Days201819974
100 F (37.8 C): Days1120161
0 C (32 F): Ice days (max29113201280
0 C (32 F): Frost days (min3195201681
-10 C (14 F): Days with min3120201654
-20 C (-4 F): Days with min365201624
-30 C (-22 F): Days with min2320163
20 C (68 F): Tropical nights (min2120162

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

  • Data for Hyesan 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).