Alni Threshold Days by Year (ASN00037000)

5 fixed thresholds counted per year at Alni (ASN00037000): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alni Thresholds

Alni: days with 10 mm (0.39 in) or more of precipitation in 97 years, most in 2000 with 29.
Alni: days with 25 mm (0.98 in) or more of precipitation in 93 years, most in 2000 with 14.
Alni: days with 50 mm (1.97 in) or more of precipitation in 67 years, most in 2000 with 7.
Alni: days with 100 mm (3.94 in) or more of precipitation in 17 years, most in 1922 with 2.
5 fixed thresholds have at least one qualifying day at Alni.

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

97 years with a qualifying day

Days per year at Alni with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 29 in 2000.

Days with 10 mm (0.39 in) or more of precipitation per year at Alni
Year	Days	Decade average
1917	16	12.3
1918	13	12.3
1919	8	12.3
1922	9	9.2
1923	6	9.2
1924	17	9.2
1925	9	9.2
1926	5	9.2
1934	7	10.2
1935	7	10.2
1936	16	10.2
1937	9	10.2
1938	10	10.2
1939	12	10.2
1940	15	11.9
1941	22	11.9
1942	6	11.9
1943	9	11.9
1944	13	11.9
1945	11	11.9
1947	11	11.9
1948	6	11.9
1949	14	11.9
1950	28	14.7
1951	10	14.7
1952	9	14.7
1954	17	14.7
1955	14	14.7
1956	23	14.7
1957	12	14.7
1958	11	14.7
1959	8	14.7
1960	9	8.2
1961	9	8.2
1962	11	8.2
1963	10	8.2
1964	13	8.2
1965	4	8.2
1966	4	8.2
1967	6	8.2
1968	11	8.2
1969	5	8.2
1970	7	13.4
1971	11	13.4
1972	11	13.4
1973	19	13.4
1974	20	13.4
1975	14	13.4
1976	14	13.4
1977	15	13.4
1978	10	13.4
1979	13	13.4
1980	10	11.3
1981	17	11.3
1982	7	11.3
1983	7	11.3
1984	14	11.3
1985	8	11.3
1986	11	11.3
1987	14	11.3
1988	11	11.3
1989	14	11.3
1990	9	12
1991	16	12
1993	6	12
1995	13	12
1996	8	12
1997	12	12
1998	18	12
1999	14	12
2000	29	10.1
2001	6	10.1
2002	1	10.1
2003	5	10.1
2004	10	10.1
2005	7	10.1
2006	10	10.1
2007	9	10.1
2008	7	10.1
2009	17	10.1
2010	21	10.9
2011	16	10.9
2012	12	10.9
2013	5	10.9
2014	5	10.9
2015	9	10.9
2016	16	10.9
2017	8	10.9
2018	9	10.9
2019	8	10.9
2020	6	12.9
2021	13	12.9
2022	13	12.9
2023	15	12.9
2024	12	12.9
2025	17	12.9
2026	14	12.9

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

First to last qualifying date each year at Alni
Year	First date	Last date
1917	1917-01-01	1917-12-28
1918	1918-01-02	1918-12-30
1919	1919-01-23	1919-12-04
1922	1922-01-30	1922-12-25
1923	1923-01-06	1923-11-02
1924	1924-01-05	1924-12-15
1925	1925-01-19	1925-11-18
1926	1926-01-29	1926-10-14
1934	1934-01-30	1934-10-17
1935	1935-01-19	1935-11-06
1936	1936-01-06	1936-11-28
1937	1937-01-02	1937-11-13
1938	1938-01-24	1938-11-17
1939	1939-01-19	1939-10-20
1940	1940-01-07	1940-11-12
1941	1941-01-04	1941-11-07
1942	1942-02-13	1942-12-29
1943	1943-01-14	1943-12-19
1944	1944-02-03	1944-12-20
1945	1945-01-06	1945-07-11
1947	1947-02-02	1947-12-15
1948	1948-01-02	1948-12-30
1949	1949-01-27	1949-12-20
1950	1950-01-16	1950-12-21
1951	1951-01-05	1951-10-15
1952	1952-01-21	1952-11-26
1954	1954-01-01	1954-12-12
1955	1955-01-21	1955-10-19
1956	1956-01-19	1956-12-22
1957	1957-01-10	1957-12-29
1958	1958-01-30	1958-11-23
1959	1959-03-13	1959-12-18
1960	1960-01-09	1960-12-26
1961	1961-01-02	1961-12-15
1962	1962-02-04	1962-12-28
1963	1963-01-11	1963-10-27
1964	1964-01-26	1964-12-25
1965	1965-01-07	1965-03-10
1966	1966-01-07	1966-11-08
1967	1967-02-03	1967-06-09
1968	1968-01-16	1968-12-24
1969	1969-01-19	1969-12-24
1970	1970-02-02	1970-12-25
1971	1971-02-05	1971-11-25
1972	1972-01-05	1972-11-29
1973	1973-01-09	1973-12-25
1974	1974-01-08	1974-12-28
1975	1975-01-02	1975-12-28
1976	1976-01-14	1976-12-21
1977	1977-01-17	1977-12-20
1978	1978-01-15	1978-12-26
1979	1979-01-22	1979-12-30
1980	1980-01-02	1980-12-03
1981	1981-01-14	1981-07-21
1982	1982-01-19	1982-12-30
1983	1983-01-02	1983-11-28
1984	1984-01-08	1984-12-19
1985	1985-03-15	1985-12-22
1986	1986-02-03	1986-12-25
1987	1987-01-24	1987-12-29
1988	1988-04-01	1988-12-24
1989	1989-02-03	1989-12-14
1990	1990-01-16	1990-12-25
1991	1991-01-12	1991-12-10
1993	1993-01-11	1993-12-23
1995	1995-01-04	1995-12-31
1996	1996-01-02	1996-12-16
1997	1997-01-29	1997-12-13
1998	1998-01-13	1998-12-31
1999	1999-01-01	1999-12-27
2000	2000-01-21	2000-12-28
2001	2001-02-06	2001-12-16
2002	2002-03-01	2002-03-01
2003	2003-02-09	2003-12-05
2004	2004-01-13	2004-12-28
2005	2005-01-05	2005-11-23
2006	2006-01-27	2006-05-23
2007	2007-01-12	2007-12-26
2008	2008-01-06	2008-11-28
2009	2009-01-01	2009-12-31
2010	2010-01-03	2010-12-27
2011	2011-01-01	2011-12-19
2012	2012-01-24	2012-12-22
2013	2013-02-17	2013-12-01
2014	2014-02-03	2014-12-11
2015	2015-01-03	2015-12-29
2016	2016-01-01	2016-08-24
2017	2017-01-02	2017-07-07
2018	2018-01-01	2018-12-14
2019	2019-01-30	2019-03-28
2020	2020-01-25	2020-12-28
2021	2021-01-04	2021-12-06
2022	2022-01-25	2022-12-25
2023	2023-01-26	2023-12-17
2024	2024-01-03	2024-12-21
2025	2025-01-16	2025-12-30
2026	2026-01-01	2026-04-18

Every Fixed Threshold

Fixed thresholds at Alni
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	97	29	2000	14
25 mm (0.98 in): Days with 25 mm or more rain	93	14	2000	10
50 mm (1.97 in): Days with 50 mm or more rain	67	7	2000	4
100 mm (3.94 in): Days with 100 mm or more rain	17	2	1922	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1950	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

Download the Data

Data for Alni 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Alni Threshold Days by Year (ASN00037000)

Key Facts for Alni Thresholds

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

Every Fixed Threshold

Download the Data

Related