Koran Threshold Days by Year (USC00164931)

6 fixed thresholds counted per year at Koran (USC00164931): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Koran Thresholds

Koran: days with 10 mm (0.39 in) or more of precipitation in 63 years, most in 2004 with 55.
Koran: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 2004 with 27.
Koran: days with 50 mm (1.97 in) or more of precipitation in 63 years, most in 2009 with 13.
Koran: days with 100 mm (3.94 in) or more of precipitation in 28 years, most in 1958 with 3.
6 fixed thresholds have at least one qualifying day at Koran.

Days with 10 mm (0.39 in) or more of precipitation

63 years with a qualifying day

Days per year at Koran with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 2004.

Days with 10 mm (0.39 in) or more of precipitation per year at Koran
Year	Days	Decade average
1948	30	37
1949	44	37
1950	40	37.8
1951	31	37.8
1952	31	37.8
1953	44	37.8
1954	28	37.8
1957	51	37.8
1958	44	37.8
1959	33	37.8
1960	40	38.2
1961	51	38.2
1962	36	38.2
1963	27	38.2
1964	35	38.2
1965	35	38.2
1966	38	38.2
1967	37	38.2
1968	54	38.2
1969	29	38.2
1971	28	40.8
1973	46	40.8
1974	48	40.8
1975	53	40.8
1976	37	40.8
1977	31	40.8
1978	34	40.8
1979	49	40.8
1980	29	39
1981	36	39
1982	37	39
1983	37	39
1984	41	39
1985	38	39
1986	46	39
1987	45	39
1988	39	39
1989	42	39
1990	46	39.9
1991	48	39.9
1992	40	39.9
1993	36	39.9
1994	39	39.9
1995	35	39.9
1996	38	39.9
1997	45	39.9
1998	41	39.9
1999	31	39.9
2000	45	41.6
2001	48	41.6
2002	36	41.6
2003	34	41.6
2004	55	41.6
2006	36	41.6
2007	36	41.6
2008	39	41.6
2009	45	41.6
2012	36	38
2013	32	38
2014	34	38
2015	51	38
2016	38	38
2017	37	38

For each year, a bar from the first to the last day at Koran meeting 10 mm (0.39 in).

First to last qualifying date each year at Koran
Year	First date	Last date
1948	1948-01-01	1948-12-29
1949	1949-01-03	1949-12-22
1950	1950-01-01	1950-12-14
1951	1951-01-02	1951-12-26
1952	1952-01-27	1952-12-31
1953	1953-01-23	1953-12-28
1954	1954-01-10	1954-12-29
1957	1957-01-04	1957-12-28
1958	1958-01-13	1958-11-28
1959	1959-01-16	1959-12-27
1960	1960-01-01	1960-12-31
1961	1961-01-07	1961-12-31
1962	1962-01-15	1962-12-29
1963	1963-01-05	1963-12-21
1964	1964-01-04	1964-12-18
1965	1965-01-03	1965-12-19
1966	1966-01-02	1966-12-31
1967	1967-01-13	1967-12-31
1968	1968-01-03	1968-12-28
1969	1969-02-01	1969-11-19
1971	1971-01-23	1971-12-06
1973	1973-01-03	1973-12-26
1974	1974-01-03	1974-12-28
1975	1975-01-03	1975-12-29
1976	1976-01-02	1976-12-20
1977	1977-01-07	1977-12-14
1978	1978-01-16	1978-12-31
1979	1979-01-01	1979-12-24
1980	1980-01-22	1980-12-09
1981	1981-01-07	1981-12-14
1982	1982-01-02	1982-11-26
1983	1983-01-01	1983-12-22
1984	1984-01-10	1984-12-31
1985	1985-01-01	1985-12-13
1986	1986-01-25	1986-12-23
1987	1987-01-03	1987-12-31
1988	1988-01-07	1988-12-31
1989	1989-01-12	1989-12-31
1990	1990-01-04	1990-12-31
1991	1991-01-07	1991-12-23
1992	1992-01-08	1992-12-26
1993	1993-01-05	1993-12-13
1994	1994-01-11	1994-12-29
1995	1995-01-06	1995-12-31
1996	1996-01-02	1996-12-29
1997	1997-01-05	1997-12-23
1998	1998-01-06	1998-12-24
1999	1999-01-02	1999-12-18
2000	2000-01-08	2000-12-28
2001	2001-01-11	2001-12-17
2002	2002-01-06	2002-12-31
2003	2003-02-06	2003-12-29
2004	2004-01-05	2004-12-23
2006	2006-01-17	2006-12-30
2007	2007-01-04	2007-12-27
2008	2008-01-26	2008-12-28
2009	2009-01-06	2009-12-24
2012	2012-01-09	2012-12-25
2013	2013-01-01	2013-12-22
2014	2014-01-10	2014-12-27
2015	2015-01-01	2015-12-28
2016	2016-01-07	2016-12-05
2017	2017-01-02	2017-12-21

Every Fixed Threshold

Fixed thresholds at Koran
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	63	55	2004	37
25 mm (0.98 in): Days with 25 mm or more rain	63	27	2004	12
50 mm (1.97 in): Days with 50 mm or more rain	63	13	2009	6
100 mm (3.94 in): Days with 100 mm or more rain	28	3	1958	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1950	1
10 cm (3.9 in): Days with 10 cm or more snowfall	1	1	1977	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

Data for Koran 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).

Koran Threshold Days by Year (USC00164931)

Key Facts for Koran Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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