Ratan Threshold Days by Year (SWE00139818)

3 fixed thresholds counted per year at Ratan (SWE00139818): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ratan Thresholds

Ratan: days with 10 mm (0.39 in) or more of precipitation in 76 years, most in 2000 with 29.
Ratan: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1966 with 5.
Ratan: days with 50 mm (1.97 in) or more of precipitation in 2 years, most in 1948 with 1.
3 fixed thresholds have at least one qualifying day at Ratan.

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

76 years with a qualifying day

Days per year at Ratan 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 Ratan
Year	Days	Decade average
1945	28	16.8
1946	8	16.8
1947	9	16.8
1948	20	16.8
1949	19	16.8
1950	18	17.3
1951	13	17.3
1952	12	17.3
1953	27	17.3
1954	16	17.3
1955	20	17.3
1956	12	17.3
1957	22	17.3
1958	15	17.3
1959	18	17.3
1960	24	18.6
1961	18	18.6
1962	16	18.6
1963	18	18.6
1964	15	18.6
1965	23	18.6
1966	26	18.6
1967	16	18.6
1968	12	18.6
1969	18	18.6
1970	15	12.6
1971	11	12.6
1972	11	12.6
1973	12	12.6
1974	14	12.6
1975	10	12.6
1976	9	12.6
1977	16	12.6
1978	15	12.6
1979	13	12.6
1980	15	15.1
1981	22	15.1
1982	11	15.1
1983	14	15.1
1984	19	15.1
1985	19	15.1
1986	13	15.1
1987	22	15.1
1988	4	15.1
1989	12	15.1
1990	9	15.4
1991	15	15.4
1992	16	15.4
1993	23	15.4
1994	11	15.4
1995	14	15.4
1996	18	15.4
1997	12	15.4
1998	21	15.4
1999	15	15.4
2000	29	15.5
2001	21	15.5
2002	9	15.5
2003	10	15.5
2004	12	15.5
2005	13	15.5
2006	13	15.5
2007	14	15.5
2008	9	15.5
2009	25	15.5
2010	18	15
2011	17	15
2012	13	15
2013	15	15
2014	13	15
2015	20	15
2016	15	15
2017	15	15
2018	9	15
2019	15	15
2020	16	16

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

First to last qualifying date each year at Ratan
Year	First date	Last date
1945	1945-01-07	1945-12-17
1946	1946-02-01	1946-10-09
1947	1947-03-31	1947-12-03
1948	1948-01-26	1948-10-22
1949	1949-05-25	1949-12-26
1950	1950-01-02	1950-11-23
1951	1951-01-12	1951-11-09
1952	1952-01-15	1952-11-05
1953	1953-02-03	1953-12-03
1954	1954-05-16	1954-12-12
1955	1955-01-29	1955-11-12
1956	1956-01-12	1956-09-28
1957	1957-04-09	1957-11-30
1958	1958-03-05	1958-12-17
1959	1959-01-02	1959-12-28
1960	1960-05-28	1960-11-27
1961	1961-01-29	1961-12-30
1962	1962-03-31	1962-12-12
1963	1963-04-11	1963-11-18
1964	1964-06-03	1964-10-15
1965	1965-04-18	1965-12-26
1966	1966-01-29	1966-12-17
1967	1967-01-01	1967-12-23
1968	1968-05-05	1968-12-19
1969	1969-03-30	1969-11-10
1970	1970-03-05	1970-11-08
1971	1971-04-22	1971-11-29
1972	1972-04-03	1972-11-21
1973	1973-04-01	1973-12-13
1974	1974-02-11	1974-11-27
1975	1975-01-13	1975-09-12
1976	1976-04-05	1976-12-03
1977	1977-01-01	1977-11-12
1978	1978-01-30	1978-11-15
1979	1979-04-25	1979-11-16
1980	1980-05-19	1980-10-18
1981	1981-03-07	1981-11-28
1982	1982-02-06	1982-12-15
1983	1983-03-21	1983-09-17
1984	1984-01-13	1984-11-27
1985	1985-01-22	1985-12-03
1986	1986-04-26	1986-12-05
1987	1987-02-13	1987-11-12
1988	1988-06-29	1988-09-12
1989	1989-02-25	1989-11-07
1990	1990-01-28	1990-10-29
1991	1991-03-22	1991-10-01
1992	1992-02-13	1992-11-12
1993	1993-02-18	1993-12-19
1994	1994-01-05	1994-12-31
1995	1995-01-01	1995-08-25
1996	1996-04-23	1996-11-21
1997	1997-03-26	1997-12-31
1998	1998-06-15	1998-11-21
1999	1999-02-26	1999-12-17
2000	2000-01-29	2000-12-13
2001	2001-01-24	2001-10-31
2002	2002-01-22	2002-10-23
2003	2003-06-19	2003-11-01
2004	2004-06-20	2004-12-23
2005	2005-01-08	2005-10-25
2006	2006-08-01	2006-11-16
2007	2007-01-14	2007-12-01
2008	2008-01-16	2008-12-02
2009	2009-01-02	2009-12-26
2010	2010-04-30	2010-09-24
2011	2011-01-22	2011-12-09
2012	2012-01-03	2012-12-06
2013	2013-06-02	2013-10-22
2014	2014-02-07	2014-11-04
2015	2015-01-10	2015-09-17
2016	2016-01-10	2016-11-09
2017	2017-01-03	2017-12-28
2018	2018-01-31	2018-12-08
2019	2019-01-16	2019-11-16
2020	2020-01-29	2020-11-18

Every Fixed Threshold

Fixed thresholds at Ratan
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	76	29	2000	16
25 mm (0.98 in): Days with 25 mm or more rain	53	5	1966	2
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1948	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

Download the Data

Data for Ratan 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).

Ratan Threshold Days by Year (SWE00139818)

Key Facts for Ratan Thresholds

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

Every Fixed Threshold

Download the Data

Related