Koppio Threshold Days by Year

3 fixed thresholds counted per year at Koppio (ASN00018043): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Koppio Thresholds

Koppio: days with 10 mm (0.39 in) or more of precipitation in 103 years, most in 1917 with 28.
Koppio: days with 25 mm (0.98 in) or more of precipitation in 77 years, most in 1932 with 6.
Koppio: days with 50 mm (1.97 in) or more of precipitation in 15 years, most in 1916 with 2.
3 fixed thresholds have at least one qualifying day at Koppio.

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

103 years with a qualifying day

Days per year at Koppio with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1917.

Days with 10 mm (0.39 in) or more of precipitation per year at Koppio
Year	Days	Decade average
1916	18	18.3
1917	28	18.3
1919	9	18.3
1920	22	14.7
1922	15	14.7
1923	20	14.7
1924	8	14.7
1925	13	14.7
1926	16	14.7
1927	11	14.7
1928	12	14.7
1929	15	14.7
1930	6	14.6
1931	13	14.6
1932	20	14.6
1933	19	14.6
1934	12	14.6
1935	20	14.6
1936	9	14.6
1937	15	14.6
1938	14	14.6
1939	18	14.6
1940	14	12.4
1941	14	12.4
1942	17	12.4
1943	14	12.4
1944	6	12.4
1945	8	12.4
1946	13	12.4
1947	14	12.4
1948	8	12.4
1949	16	12.4
1950	11	11.2
1951	15	11.2
1952	18	11.2
1953	10	11.2
1954	9	11.2
1955	9	11.2
1956	18	11.2
1957	7	11.2
1958	12	11.2
1959	3	11.2
1960	18	13.7
1961	13	13.7
1962	11	13.7
1963	16	13.7
1964	17	13.7
1965	7	13.7
1966	17	13.7
1967	5	13.7
1968	19	13.7
1969	14	13.7
1970	10	16.1
1971	22	16.1
1972	15	16.1
1973	12	16.1
1974	17	16.1
1975	13	16.1
1976	11	16.1
1977	10	16.1
1978	23	16.1
1979	28	16.1
1980	18	15.5
1981	24	15.5
1982	7	15.5
1983	20	15.5
1984	18	15.5
1985	12	15.5
1986	10	15.5
1987	11	15.5
1988	19	15.5
1989	16	15.5
1990	14	13
1991	8	13
1992	27	13
1993	10	13
1994	5	13
1995	16	13
1996	16	13
1997	13	13
1998	11	13
1999	10	13
2000	17	13.8
2001	15	13.8
2002	7	13.8
2003	14	13.8
2004	13	13.8
2005	17	13.8
2006	13	13.8
2007	18	13.8
2008	10	13.8
2010	23	16.8
2011	14	16.8
2012	10	16.8
2013	19	16.8
2014	18	16.8
2020	12	13.3
2021	15	13.3
2022	21	13.3
2023	11	13.3
2024	12	13.3
2025	8	13.3
2026	14	13.3

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

First to last qualifying date each year at Koppio
Year	First date	Last date
1916	1916-05-17	1916-11-04
1917	1917-01-21	1917-12-11
1919	1919-01-06	1919-10-07
1920	1920-05-15	1920-11-27
1922	1922-01-06	1922-12-09
1923	1923-01-05	1923-12-14
1924	1924-05-23	1924-10-31
1925	1925-04-02	1925-11-18
1926	1926-04-24	1926-12-26
1927	1927-02-03	1927-11-01
1928	1928-02-12	1928-10-05
1929	1929-02-15	1929-12-27
1930	1930-05-11	1930-08-13
1931	1931-04-29	1931-09-11
1932	1932-02-05	1932-10-30
1933	1933-01-20	1933-11-19
1934	1934-02-16	1934-11-08
1935	1935-03-22	1935-12-24
1936	1936-05-11	1936-12-03
1937	1937-02-16	1937-12-11
1938	1938-02-19	1938-12-27
1939	1939-01-16	1939-11-04
1940	1940-01-05	1940-11-21
1941	1941-01-24	1941-11-18
1942	1942-02-07	1942-11-19
1943	1943-01-12	1943-12-17
1944	1944-04-08	1944-09-30
1945	1945-01-31	1945-12-16
1946	1946-01-18	1946-12-24
1947	1947-02-09	1947-11-29
1948	1948-04-11	1948-11-04
1949	1949-02-20	1949-11-21
1950	1950-06-01	1950-10-24
1951	1951-05-13	1951-12-09
1952	1952-05-07	1952-11-27
1953	1953-02-10	1953-09-02
1954	1954-04-06	1954-12-11
1955	1955-02-08	1955-11-17
1956	1956-03-21	1956-12-13
1957	1957-03-13	1957-12-30
1958	1958-03-07	1958-09-12
1959	1959-05-18	1959-11-29
1960	1960-01-17	1960-11-17
1961	1961-04-07	1961-10-31
1962	1962-03-28	1962-12-29
1963	1963-01-13	1963-10-27
1964	1964-02-01	1964-11-18
1965	1965-05-11	1965-08-16
1966	1966-03-15	1966-12-04
1967	1967-02-23	1967-08-10
1968	1968-01-19	1968-12-03
1969	1969-02-09	1969-09-21
1970	1970-05-02	1970-09-22
1971	1971-03-14	1971-12-10
1972	1972-01-11	1972-12-26
1973	1973-03-18	1973-10-18
1974	1974-01-30	1974-10-31
1975	1975-01-25	1975-12-14
1976	1976-01-12	1976-11-02
1977	1977-02-13	1977-11-27
1978	1978-05-09	1978-11-19
1979	1979-02-24	1979-12-13
1980	1980-04-18	1980-11-06
1981	1981-01-27	1981-11-09
1982	1982-02-20	1982-08-11
1983	1983-03-01	1983-12-06
1984	1984-04-07	1984-12-30
1985	1985-03-14	1985-12-09
1986	1986-04-16	1986-12-07
1987	1987-02-28	1987-12-09
1988	1988-01-14	1988-12-21
1989	1989-04-30	1989-12-02
1990	1990-06-16	1990-12-07
1991	1991-05-06	1991-09-18
1992	1992-03-01	1992-12-25
1993	1993-01-24	1993-10-28
1994	1994-05-26	1994-07-30
1995	1995-01-14	1995-09-24
1996	1996-03-16	1996-09-30
1997	1997-05-03	1997-12-09
1998	1998-04-12	1998-12-20
1999	1999-01-08	1999-12-03
2000	2000-02-20	2000-10-18
2001	2001-05-15	2001-12-06
2002	2002-06-08	2002-11-26
2003	2003-01-30	2003-12-20
2004	2004-05-18	2004-11-05
2005	2005-03-05	2005-12-12
2006	2006-01-01	2006-12-15
2007	2007-01-20	2007-11-21
2008	2008-04-27	2008-12-12
2010	2010-01-12	2010-12-08
2011	2011-02-18	2011-12-09
2012	2012-04-21	2012-08-23
2013	2013-02-17	2013-12-21
2014	2014-02-14	2014-11-22
2020	2020-02-01	2020-12-13
2021	2021-02-05	2021-10-29
2022	2022-01-22	2022-11-13
2023	2023-01-18	2023-12-11
2024	2024-01-06	2024-11-17
2025	2025-06-08	2025-10-25
2026	2026-02-28	2026-08-25

Every Fixed Threshold

Fixed thresholds at Koppio
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	103	28	1917	14
25 mm (0.98 in): Days with 25 mm or more rain	77	6	1932	3
50 mm (1.97 in): Days with 50 mm or more rain	15	2	1916	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.

Download the Data

Data for Koppio 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Koppio Threshold Days by Year

Key Facts for Koppio Thresholds

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

Every Fixed Threshold

Download the Data

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