Riddarhyttan Weather Records (SWE00139126)

Record envelope, standing records and threshold days for Riddarhyttan (SWE00139126), Sweden, with 96 years of record.

Key Facts for Riddarhyttan

Riddarhyttan (SWE00139126) is a weather station in Sweden at 59.81 latitude and 15.56 longitude, 155 m (509 ft) above sea level.
The station reports from 1931 to 2026, 96 years of record.
1,464 records set at Riddarhyttan still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Riddarhyttan set a daily record precipitation of 14.5 mm (0.6 in) on 14 June 2026.

About the Station

Location: Sweden, 59.81 latitude, 15.56 longitude.
Elevation: 155 m (509 ft).
Period of record: 1931 to 2026, 96 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Riddarhyttan. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Riddarhyttan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	8.5 C (47.3 F)	-28.1 C (-18.6 F)	n/a	n/a
Feb	9.4 C (48.9 F)	-30.2 C (-22.4 F)	n/a	n/a
Mar	18.1 C (64.6 F)	-20.2 C (-4.4 F)	n/a	n/a
Apr	23.1 C (73.6 F)	-16.0 C (3.2 F)	n/a	n/a
May	29.8 C (85.6 F)	-6.6 C (20.1 F)	n/a	n/a
Jun	34.8 C (94.6 F)	-0.5 C (31.1 F)	n/a	n/a
Jul	35.0 C (95.0 F)	-0.8 C (30.6 F)	n/a	n/a
Aug	34.0 C (93.2 F)	0.0 C (32.0 F)	n/a	n/a
Sep	26.0 C (78.8 F)	-4.0 C (24.8 F)	n/a	n/a
Oct	19.0 C (66.2 F)	-11.8 C (10.8 F)	n/a	n/a
Nov	12.0 C (53.6 F)	-20.6 C (-5.1 F)	n/a	n/a
Dec	11.5 C (52.7 F)	-23.6 C (-10.5 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Riddarhyttan still stand. 1947 holds the most, with 94.

Standing records at Riddarhyttan by the year they were set
Year set	Standing records
1945	46
1946	57
1947	94
1948	56
1949	72
1950	24
1951	38
1952	54
1953	56
1954	8
1968	66
1969	52
1970	59
1971	72
1972	49
1973	65
1974	39
1975	81
1976	60
1977	76
1978	65
1979	51
1980	50
1981	57
1982	55
1983	51
1984	11

Wettest Day of Each Month

Aug: 80.9 mm (3.2 in)

The wettest day on record for each calendar month at Riddarhyttan. The most was 80.9 mm (3.2 in) on 10 August 1951.

Record daily precipitation for each month at Riddarhyttan
Month	Record daily precipitation (mm)	Date
Jan	31.8 mm (1.3 in)	17 January 1936
Feb	24.8 mm (1.0 in)	7 February 1984
Mar	23.2 mm (0.9 in)	11 March 2021
Apr	33.4 mm (1.3 in)	7 April 2022
May	38.5 mm (1.5 in)	9 May 1997
Jun	48.6 mm (1.9 in)	23 June 1980
Jul	73.8 mm (2.9 in)	16 July 1982
Aug	80.9 mm (3.2 in)	10 August 1951
Sep	44.0 mm (1.7 in)	22 September 1999
Oct	51.7 mm (2.0 in)	30 October 2023
Nov	35.3 mm (1.4 in)	19 November 1970
Dec	40.8 mm (1.6 in)	1 December 1997

Period of Record Coverage

1945 to 1984

27 years of record at Riddarhyttan, 1945 to 1984. 4 years have data for under 90 percent of days and are left out of rankings: 1954, 1968, 1983, 1984.

Days with data per year at Riddarhyttan
Year	Days with data	Share of year	Complete
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	355	97%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	365	100%	Yes
1953	335	92%	Yes
1954	90	25%	No
1968	306	84%	No
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	334	92%	Yes
1980	335	92%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	327	90%	No
1984	151	41%	No

Latest Records

Latest records at Riddarhyttan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 June 2026	Riddarhyttan, SE	daily rain	14.5 mm (0.6 in)	2.0 mm (0.08 in)	16 years	17 of 100 (Routine)
11 May 2026	Riddarhyttan, SE	daily rain	9.9 mm (0.39 in)	0.8 mm (0.03 in)	13 years	14 of 100 (Routine)
25 March 2026	Riddarhyttan, SE	daily rain	12.0 mm (0.5 in)	0.5 mm (0.02 in)	43 years	20 of 100 (Routine)
28 February 2026	Riddarhyttan, SE	daily rain	10.5 mm (0.4 in)	1.1 mm (0.04 in)	88 years	20 of 100 (Routine)
24 October 2025	Riddarhyttan, SE	daily rain	25.2 mm (1.0 in)	2.7 mm (0.11 in)	44 years	26 of 100 (Routine)
4 October 2025	Riddarhyttan, SE	daily rain	25.7 mm (1.0 in)	0.2 mm (0.01 in)	4 years	10 of 100 (Routine)
29 July 2025	Riddarhyttan, SE	daily rain	21.3 mm (0.8 in)	5.8 mm (0.23 in)	15 years	20 of 100 (Routine)
23 May 2025	Riddarhyttan, SE	daily rain	14.7 mm (0.6 in)	3.6 mm (0.14 in)	2 years	15 of 100 (Routine)
23 January 2025	Riddarhyttan, SE	daily rain	23.0 mm (0.9 in)	9.2 mm (0.36 in)	81 years	20 of 100 (Routine)
6 January 2025	Riddarhyttan, SE	daily rain	14.8 mm (0.6 in)	3.3 mm (0.13 in)	26 years	20 of 100 (Routine)
10 October 2024	Riddarhyttan, SE	daily rain	28.2 mm (1.1 in)	0.2 mm (0.01 in)	89 years	35 of 100 (Notable)
28 March 2024	Riddarhyttan, SE	daily rain	15.3 mm (0.6 in)	4.8 mm (0.19 in)	3 years	20 of 100 (Routine)
16 March 2024	Riddarhyttan, SE	daily rain	19.8 mm (0.8 in)	4.8 mm (0.19 in)	19 years	20 of 100 (Routine)
16 February 2024	Riddarhyttan, SE	daily rain	22.5 mm (0.9 in)	11.5 mm (0.5 in)	88 years	20 of 100 (Routine)
21 December 2023	Riddarhyttan, SE	daily rain	12.5 mm (0.5 in)	3.2 mm (0.13 in)	20 years	20 of 100 (Routine)
30 October 2023	Riddarhyttan, SE	monthly rain	51.7 mm (2.0 in)	5.7 mm (0.22 in)	74 years	50 of 100 (Notable)
15 August 2023	Riddarhyttan, SE	daily rain	33.1 mm (1.3 in)	4.1 mm (0.16 in)	16 years	19 of 100 (Routine)
12 August 2023	Riddarhyttan, SE	daily rain	31.7 mm (1.2 in)	6.7 mm (0.26 in)	18 years	22 of 100 (Routine)
12 July 2023	Riddarhyttan, SE	daily rain	16.5 mm (0.6 in)	6.2 mm (0.24 in)	22 years	20 of 100 (Routine)
2 July 2023	Riddarhyttan, SE	daily rain	31.0 mm (1.2 in)	1.6 mm (0.06 in)	84 years	36 of 100 (Notable)

Climate Trend

19 complete years, 1945 to 1982

One stripe for each of 19 complete years at Riddarhyttan, 1945 to 1982. Blue stripes are years cooler than the station's own mean of 5.1 C (41.2 F); red stripes are warmer. The coolest year was 1970, at 3.5 C (38.3 F), and the warmest was 1949, at 6.9 C (44.5 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Riddarhyttan as warming stripes, 1945 to 1982
Year	Annual mean temperature	Difference from the station mean
1945	6.0 C	+0.93 C
1946	5.9 C	+0.76 C
1947	5.2 C	+0.14 C
1949	6.9 C	+1.82 C
1950	5.7 C	+0.63 C
1951	5.4 C	+0.32 C
1952	4.2 C	-0.88 C
1969	4.1 C	-1.05 C
1970	3.5 C	-1.61 C
1971	5.0 C	-0.15 C
1972	5.4 C	+0.33 C
1973	5.2 C	+0.07 C
1974	5.9 C	+0.80 C
1975	6.4 C	+1.32 C
1976	4.4 C	-0.66 C
1977	4.6 C	-0.55 C
1978	4.1 C	-1.05 C
1981	4.1 C	-0.99 C
1982	5.0 C	-0.09 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1931 to 2026

Yearly extremes at Riddarhyttan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.0 C (95.0 F)	1945	30.5 C (86.9 F)	27
Coldest night (TNn)	-30.2 C (-22.4 F)	1970	-21.6 C (-6.9 F)	27
Wettest day (Rx1day)	80.9 mm (3.2 in)	1951	32.0 mm (1.3 in)	81
Wettest five days (Rx5day)	140.3 mm (5.5 in)	1951	56.9 mm (2.2 in)	81
Longest dry spell (CDD)	64 days	1974	20 days	81

Hottest day (TXx)

The hottest day of the year at Riddarhyttan, 1931 to 2026. The record is 35.0 C (95.0 F) in 1945, marked on the chart; the median year is 30.5 C (86.9 F).

Hottest day (TXx) at Riddarhyttan by year
Year	Hottest day (TXx)
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	35.0 C (95.0 F)
1946	31.4 C (88.5 F)
1947	34.8 C (94.6 F)
1948	33.2 C (91.8 F)
1949	32.2 C (90.0 F)
1950	29.0 C (84.2 F)
1951	29.0 C (84.2 F)
1952	29.0 C (84.2 F)
1953	32.0 C (89.6 F)
1954	12.3 C (54.1 F)
1968	30.5 C (86.9 F)
1969	30.5 C (86.9 F)
1970	33.5 C (92.3 F)
1971	29.4 C (84.9 F)
1972	30.6 C (87.1 F)
1973	31.0 C (87.8 F)
1974	27.0 C (80.6 F)
1975	34.0 C (93.2 F)
1976	29.4 C (84.9 F)
1977	30.0 C (86.0 F)
1978	28.2 C (82.8 F)
1979	29.0 C (84.2 F)
1980	27.6 C (81.7 F)
1981	27.2 C (81.0 F)
1982	31.5 C (88.7 F)
1983	31.2 C (88.2 F)
1984	24.0 C (75.2 F)
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Riddarhyttan, 1931 to 2026. The record is -30.2 C (-22.4 F) in 1970, marked on the chart; the median year is -21.6 C (-6.9 F).

Coldest night (TNn) at Riddarhyttan by year
Year	Coldest night (TNn)
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	-18.0 C (-0.4 F)
1946	-20.2 C (-4.4 F)
1947	-22.2 C (-8.0 F)
1948	-21.4 C (-6.5 F)
1949	-13.3 C (8.1 F)
1950	-20.9 C (-5.6 F)
1951	-18.7 C (-1.7 F)
1952	-18.9 C (-2.0 F)
1953	-22.6 C (-8.7 F)
1954	-25.1 C (-13.2 F)
1968	-17.6 C (0.3 F)
1969	-23.6 C (-10.5 F)
1970	-30.2 C (-22.4 F)
1971	-21.6 C (-6.9 F)
1972	-19.1 C (-2.4 F)
1973	-22.1 C (-7.8 F)
1974	-18.1 C (-0.6 F)
1975	-17.5 C (0.5 F)
1976	-22.0 C (-7.6 F)
1977	-23.0 C (-9.4 F)
1978	-26.0 C (-14.8 F)
1979	-27.0 C (-16.6 F)
1980	-25.0 C (-13.0 F)
1981	-23.0 C (-9.4 F)
1982	-22.0 C (-7.6 F)
1983	-19.0 C (-2.2 F)
1984	-20.0 C (-4.0 F)
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Riddarhyttan, 1931 to 2026. The record is 80.9 mm (3.2 in) in 1951, marked on the chart; the median year is 32.0 mm (1.3 in).

Wettest day (Rx1day) at Riddarhyttan by year
Year	Wettest day (Rx1day)
1931	28.1 mm (1.1 in)
1932	33.4 mm (1.3 in)
1933	38.8 mm (1.5 in)
1934	36.4 mm (1.4 in)
1935	38.4 mm (1.5 in)
1936	43.4 mm (1.7 in)
1937	34.2 mm (1.3 in)
1938	30.7 mm (1.2 in)
1939	23.9 mm (0.9 in)
1940	22.2 mm (0.9 in)
1941	28.8 mm (1.1 in)
1942	37.5 mm (1.5 in)
1943	46.7 mm (1.8 in)
1944	30.1 mm (1.2 in)
1945	27.5 mm (1.1 in)
1946	25.2 mm (1.0 in)
1947	42.3 mm (1.7 in)
1948	32.0 mm (1.3 in)
1949	46.0 mm (1.8 in)
1950	29.4 mm (1.2 in)
1951	80.9 mm (3.2 in)
1952	39.6 mm (1.6 in)
1953	32.1 mm (1.3 in)
1954	13.5 mm (0.5 in)
1968	44.0 mm (1.7 in)
1969	40.6 mm (1.6 in)
1970	40.7 mm (1.6 in)
1971	32.5 mm (1.3 in)
1972	27.0 mm (1.1 in)
1973	50.5 mm (2.0 in)
1974	25.1 mm (1.0 in)
1975	31.0 mm (1.2 in)
1976	28.6 mm (1.1 in)
1977	26.0 mm (1.0 in)
1978	46.5 mm (1.8 in)
1979	62.0 mm (2.4 in)
1980	48.6 mm (1.9 in)
1981	34.1 mm (1.3 in)
1982	73.8 mm (2.9 in)
1983	42.0 mm (1.7 in)
1984	31.6 mm (1.2 in)
1987	30.5 mm (1.2 in)
1988	37.0 mm (1.5 in)
1989	32.2 mm (1.3 in)
1990	32.0 mm (1.3 in)
1991	23.9 mm (0.9 in)
1992	27.5 mm (1.1 in)
1993	37.8 mm (1.5 in)
1994	29.2 mm (1.1 in)
1995	21.9 mm (0.9 in)
1996	31.8 mm (1.3 in)
1997	40.8 mm (1.6 in)
1998	23.5 mm (0.9 in)
1999	44.0 mm (1.7 in)
2000	29.6 mm (1.2 in)
2001	23.0 mm (0.9 in)
2002	22.0 mm (0.9 in)
2003	32.8 mm (1.3 in)
2004	44.5 mm (1.8 in)
2005	25.7 mm (1.0 in)
2006	34.4 mm (1.4 in)
2007	21.1 mm (0.8 in)
2008	31.5 mm (1.2 in)
2009	26.4 mm (1.0 in)
2010	30.3 mm (1.2 in)
2011	44.0 mm (1.7 in)
2012	23.8 mm (0.9 in)
2013	27.5 mm (1.1 in)
2014	33.0 mm (1.3 in)
2015	35.8 mm (1.4 in)
2016	24.0 mm (0.9 in)
2017	23.5 mm (0.9 in)
2018	19.1 mm (0.8 in)
2019	41.0 mm (1.6 in)
2020	26.0 mm (1.0 in)
2021	38.0 mm (1.5 in)
2022	33.4 mm (1.3 in)
2023	51.7 mm (2.0 in)
2024	28.2 mm (1.1 in)
2025	35.5 mm (1.4 in)
2026	18.6 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Riddarhyttan, 1931 to 2026. The record is 140.3 mm (5.5 in) in 1951, marked on the chart; the median year is 56.9 mm (2.2 in).

Wettest five days (Rx5day) at Riddarhyttan by year
Year	Wettest five days (Rx5day)
1931	36.3 mm (1.4 in)
1932	56.8 mm (2.2 in)
1933	59.2 mm (2.3 in)
1934	81.8 mm (3.2 in)
1935	85.8 mm (3.4 in)
1936	57.4 mm (2.3 in)
1937	48.6 mm (1.9 in)
1938	53.4 mm (2.1 in)
1939	47.1 mm (1.9 in)
1940	45.0 mm (1.8 in)
1941	48.0 mm (1.9 in)
1942	54.8 mm (2.2 in)
1943	91.7 mm (3.6 in)
1944	78.8 mm (3.1 in)
1945	49.2 mm (1.9 in)
1946	54.7 mm (2.2 in)
1947	76.1 mm (3.0 in)
1948	54.8 mm (2.2 in)
1949	99.1 mm (3.9 in)
1950	52.7 mm (2.1 in)
1951	140.3 mm (5.5 in)
1952	55.4 mm (2.2 in)
1953	70.2 mm (2.8 in)
1954	27.5 mm (1.1 in)
1968	87.9 mm (3.5 in)
1969	70.3 mm (2.8 in)
1970	61.0 mm (2.4 in)
1971	41.1 mm (1.6 in)
1972	51.9 mm (2.0 in)
1973	56.3 mm (2.2 in)
1974	50.7 mm (2.0 in)
1975	51.6 mm (2.0 in)
1976	60.3 mm (2.4 in)
1977	61.1 mm (2.4 in)
1978	66.9 mm (2.6 in)
1979	73.9 mm (2.9 in)
1980	78.6 mm (3.1 in)
1981	44.2 mm (1.7 in)
1982	73.8 mm (2.9 in)
1983	70.1 mm (2.8 in)
1984	61.5 mm (2.4 in)
1987	49.4 mm (1.9 in)
1988	62.8 mm (2.5 in)
1989	43.5 mm (1.7 in)
1990	51.6 mm (2.0 in)
1991	47.5 mm (1.9 in)
1992	62.4 mm (2.5 in)
1993	59.4 mm (2.3 in)
1994	53.7 mm (2.1 in)
1995	51.4 mm (2.0 in)
1996	49.2 mm (1.9 in)
1997	83.4 mm (3.3 in)
1998	47.2 mm (1.9 in)
1999	72.2 mm (2.8 in)
2000	66.5 mm (2.6 in)
2001	48.1 mm (1.9 in)
2002	55.5 mm (2.2 in)
2003	56.9 mm (2.2 in)
2004	65.5 mm (2.6 in)
2005	53.2 mm (2.1 in)
2006	66.1 mm (2.6 in)
2007	42.9 mm (1.7 in)
2008	64.5 mm (2.5 in)
2009	56.3 mm (2.2 in)
2010	65.5 mm (2.6 in)
2011	63.9 mm (2.5 in)
2012	65.0 mm (2.6 in)
2013	44.0 mm (1.7 in)
2014	50.7 mm (2.0 in)
2015	59.8 mm (2.4 in)
2016	43.4 mm (1.7 in)
2017	47.0 mm (1.9 in)
2018	57.3 mm (2.3 in)
2019	50.5 mm (2.0 in)
2020	71.1 mm (2.8 in)
2021	73.5 mm (2.9 in)
2022	55.1 mm (2.2 in)
2023	93.6 mm (3.7 in)
2024	73.5 mm (2.9 in)
2025	57.0 mm (2.2 in)
2026	46.0 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Riddarhyttan, 1931 to 2026. The record is 64 days in 1974, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Riddarhyttan by year
Year	Longest dry spell (CDD)
1931	30 days
1932	21 days
1933	31 days
1934	19 days
1935	21 days
1936	19 days
1937	18 days
1938	16 days
1939	27 days
1940	24 days
1941	30 days
1942	25 days
1943	21 days
1944	23 days
1945	18 days
1946	17 days
1947	45 days
1948	28 days
1949	15 days
1950	17 days
1951	42 days
1952	21 days
1953	25 days
1954	10 days
1968	20 days
1969	28 days
1970	14 days
1971	18 days
1972	18 days
1973	22 days
1974	64 days
1975	16 days
1976	22 days
1977	13 days
1978	17 days
1979	14 days
1980	17 days
1981	32 days
1982	18 days
1983	35 days
1984	18 days
1987	19 days
1988	16 days
1989	24 days
1990	16 days
1991	14 days
1992	24 days
1993	17 days
1994	19 days
1995	14 days
1996	31 days
1997	17 days
1998	17 days
1999	20 days
2000	34 days
2001	17 days
2002	25 days
2003	28 days
2004	16 days
2005	24 days
2006	21 days
2007	20 days
2008	21 days
2009	25 days
2010	19 days
2011	19 days
2012	19 days
2013	22 days
2014	12 days
2015	26 days
2016	24 days
2017	17 days
2018	22 days
2019	31 days
2020	14 days
2021	20 days
2022	22 days
2023	25 days
2024	19 days
2025	36 days
2026	27 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

76 years, 1931 to 2025

A day with at least 32.1 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 73.3 mm (2.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Riddarhyttan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	32.1 mm (1.3 in)
5 years	41.3 mm (1.6 in)
10 years	48.1 mm (1.9 in)
25 years	57.4 mm (2.3 in)
50 years	65.1 mm (2.6 in)
100 years	73.3 mm (2.9 in)	Longer than the 76 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 76 years of values from 1931 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 80.9 mm (3.2 in) in 1951; 73.8 mm (2.9 in) in 1982; 62.0 mm (2.4 in) in 1979.

Download the Data

Data for Riddarhyttan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Riddarhyttan 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). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).