Seoul City Threshold Days by Year (KSM00047108)

9 fixed thresholds counted per year at Seoul City (KSM00047108): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Seoul City Thresholds

Seoul City: days with a maximum temperature at or above 30 C (86 F) in 38 years, most in 1997 with 61.
Seoul City: days with a maximum temperature at or below 0 C (32 F) in 37 years, most in 1980 with 46.
Seoul City: days with a maximum temperature at or above 90 F (32.2 C) in 35 years, most in 1994 with 39.
Seoul City: days with a maximum temperature at or above 35 C (95 F) in 22 years, most in 1994 with 15.
9 fixed thresholds have at least one qualifying day at Seoul City.

Days at or above 30 C (86 F)

38 years with a qualifying day

Days per year at Seoul City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 61 in 1997.

Days at or above 30 C (86 F) per year at Seoul City
Year	Days	Decade average
1975	50	39.4
1976	28	39.4
1977	47	39.4
1978	44	39.4
1979	28	39.4
1980	13	27.6
1981	34	27.6
1982	30	27.6
1983	24	27.6
1984	36	27.6
1985	39	27.6
1986	16	27.6
1987	16	27.6
1988	37	27.6
1989	31	27.6
1990	34	36.1
1991	30	36.1
1992	31	36.1
1993	13	36.1
1994	56	36.1
1995	24	36.1
1996	33	36.1
1997	61	36.1
1998	33	36.1
1999	46	36.1
2000	51	36.5
2001	56	36.5
2002	23	36.5
2005	31	36.5
2008	31	36.5
2009	27	36.5
2010	49	45.3
2011	36	45.3
2012	41	45.3
2013	48	45.3
2014	40	45.3
2015	58	45.3
2025	2	2

For each year, a bar from the first to the last day at Seoul City meeting 30 C (86 F).

First to last qualifying date each year at Seoul City
Year	First date	Last date
1975	1975-06-15	1975-09-10
1976	1976-05-26	1976-09-04
1977	1977-06-08	1977-09-07
1978	1978-05-16	1978-09-15
1979	1979-07-05	1979-09-05
1980	1980-05-31	1980-08-22
1981	1981-06-16	1981-08-29
1982	1982-06-05	1982-09-01
1983	1983-06-17	1983-09-01
1984	1984-06-02	1984-08-26
1985	1985-06-05	1985-09-03
1986	1986-06-11	1986-09-01
1987	1987-06-25	1987-08-28
1988	1988-05-20	1988-09-08
1989	1989-06-07	1989-08-24
1990	1990-07-08	1990-09-07
1991	1991-05-20	1991-09-02
1992	1992-07-05	1992-09-06
1993	1993-05-29	1993-09-06
1994	1994-06-05	1994-09-04
1995	1995-07-07	1995-08-31
1996	1996-05-31	1996-09-15
1997	1997-06-13	1997-09-08
1998	1998-05-21	1998-09-20
1999	1999-06-05	1999-09-12
2000	2000-05-25	2000-09-03
2001	2001-05-21	2001-09-16
2002	2002-06-02	2002-09-04
2005	2005-05-29	2005-09-11
2008	2008-07-08	2008-09-19
2009	2009-05-28	2009-08-23
2010	2010-06-06	2010-09-18
2011	2011-05-29	2011-09-17
2012	2012-06-14	2012-08-27
2013	2013-05-23	2013-09-19
2014	2014-05-29	2014-09-08
2015	2015-05-26	2015-09-24
2025	2025-06-29	2025-08-21

Every Fixed Threshold

Fixed thresholds at Seoul City
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	38	61	1997	2
35 C (95 F): Days	22	15	1994	1
90 F (32.2 C): Days	35	39	1994	1
100 F (37.8 C): Days	2	2	1994	1
0 C (32 F): Ice days (max	37	46	1980	11
0 C (32 F): Frost days (min	1	0	n/a	35
-10 C (14 F): Days with min	1	0	n/a	4
20 C (68 F): Tropical nights (min	1	0	n/a	40
25 C (77 F): Days with min	1	0	n/a	24

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1975.

Download the Data

Data for Seoul City 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Seoul City Threshold Days by Year (KSM00047108)

Key Facts for Seoul City Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related