Roros Weather Records (NOE00109613)

Record envelope, standing records and threshold days for Roros (NOE00109613), Norway, with 109 years of record.

Key Facts for Roros

Roros (NOE00109613) is a weather station in Norway at 62.57 latitude and 11.38 longitude, 628 m (2,060 ft) above sea level.
The station reports from 1895 to 2003, 109 years of record.
1,464 records set at Roros still stand.
Records are tracked for tmax, tmin, prcp, snwd: an element needs 30 years of data to be eligible.
Roros set a daily record precipitation of 17.5 mm (0.7 in) on 14 August 2003.

About the Station

Location: Norway, 62.57 latitude, 11.38 longitude.
Elevation: 628 m (2,060 ft).
Period of record: 1895 to 2003, 109 years.
Eligible elements: tmax, tmin, prcp, snwd.

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 Roros. 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 Roros, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.4 C (50.7 F)	-50.6 C (-59.1 F)	n/a	n/a
Feb	9.0 C (48.2 F)	-42.6 C (-44.7 F)	n/a	n/a
Mar	11.1 C (52.0 F)	-41.2 C (-42.2 F)	n/a	n/a
Apr	19.0 C (66.2 F)	-32.4 C (-26.3 F)	n/a	n/a
May	23.5 C (74.3 F)	-18.3 C (-0.9 F)	n/a	n/a
Jun	29.2 C (84.6 F)	-5.6 C (21.9 F)	n/a	n/a
Jul	29.9 C (85.8 F)	-2.0 C (28.4 F)	n/a	n/a
Aug	29.8 C (85.6 F)	-5.0 C (23.0 F)	n/a	n/a
Sep	25.7 C (78.3 F)	-11.3 C (11.7 F)	n/a	n/a
Oct	19.0 C (66.2 F)	-28.6 C (-19.5 F)	n/a	n/a
Nov	9.8 C (49.6 F)	-36.4 C (-33.5 F)	n/a	n/a
Dec	7.5 C (45.5 F)	-44.0 C (-47.2 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Roros still stand. 1993 holds the most, with 41.

Standing records at Roros by the year they were set
Year set	Standing records
1911	5
1912	10
1913	10
1914	10
1915	17
1916	3
1917	9
1918	2
1919	11
1920	5
1921	5
1922	8
1923	7
1924	5
1925	14
1926	9
1927	6
1928	7
1929	7
1930	8
1931	10
1932	14
1933	7
1934	13
1935	9
1936	4
1937	8
1938	10
1939	7
1940	10
1941	20
1942	14
1943	5
1944	13
1945	7
1946	3
1947	10
1948	4
1949	7
1950	5
1951	10
1952	8
1953	11
1954	1
1955	30
1956	14
1957	24
1958	38
1959	18
1960	18
1961	36
1962	18
1963	7
1964	20
1965	23
1966	33
1967	13
1968	28
1969	18
1970	19
1971	21
1972	16
1973	31
1974	17
1975	22
1976	14
1977	32
1978	26
1979	24
1980	15
1981	24
1982	17
1983	16
1984	24
1985	12
1986	18
1987	21
1988	11
1989	24
1990	37
1991	22
1992	31
1993	41
1994	14
1995	25
1996	21
1997	16
1998	24
1999	25
2000	30
2001	14
2002	32
2003	22

All-Time Record Progression

5 new records

5 all-time records were set at Roros between 23 August 1940 and 8 July 1991. Each dot is a new record.

When Roros set new all-time records
Date	Kind	Detail
1940-08-23	Record daily precipitation	Record daily precipitation 57.4 mm (2.3 in)
1956-09-12	Record daily precipitation	Record daily precipitation 64.0 mm (2.5 in)
1968-07-03	Record high minimum temperature	Record high minimum temperature 18.5 C (65.3 F)
1987-01-11	Record low maximum temperature	Record low maximum temperature -42.0 C (-43.6 F)
1991-07-08	Record high maximum temperature	Record high maximum temperature 29.9 C (85.8 F)

Wettest Day of Each Month

Sep: 64.0 mm (2.5 in)

The wettest day on record for each calendar month at Roros. The most was 64.0 mm (2.5 in) on 12 September 1956.

Record daily precipitation for each month at Roros
Month	Record daily precipitation (mm)	Date
Jan	24.7 mm (1.0 in)	27 January 1987
Feb	21.5 mm (0.8 in)	13 February 1992
Mar	24.0 mm (0.9 in)	24 March 1963
Apr	17.2 mm (0.7 in)	16 April 1944
May	30.0 mm (1.2 in)	7 May 1997
Jun	48.2 mm (1.9 in)	24 June 1918
Jul	60.0 mm (2.4 in)	31 July 1989
Aug	57.4 mm (2.3 in)	23 August 1940
Sep	64.0 mm (2.5 in)	12 September 1956
Oct	44.0 mm (1.7 in)	4 October 1895
Nov	21.5 mm (0.8 in)	5 November 1960
Dec	26.0 mm (1.0 in)	21 December 1975

Period of Record Coverage

1955 to 2003

49 years of record at Roros, 1955 to 2003. 1 years have data for under 90 percent of days and are left out of rankings: 2003.

Days with data per year at Roros
Year	Days with data	Share of year	Complete
1955	364	100%	Yes
1956	364	99%	Yes
1957	365	100%	Yes
1958	364	100%	Yes
1959	365	100%	Yes
1960	364	99%	Yes
1961	364	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	364	99%	Yes
1965	364	100%	Yes
1966	365	100%	Yes
1967	364	100%	Yes
1968	365	100%	Yes
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	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	364	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	364	100%	Yes
1996	365	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	364	100%	Yes
2000	366	100%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	243	67%	No

Latest Records

Latest records at Roros
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 August 2003	Roros, NO	daily rain	17.5 mm (0.7 in)	2.5 mm (0.10 in)	10 years	17 of 100 (Routine)
13 August 2003	Roros, NO	daily rain	26.6 mm (1.0 in)	10.1 mm (0.4 in)	52 years	43 of 100 (Notable)
11 August 2003	Roros, NO	daily rain	20.9 mm (0.8 in)	0.9 mm (0.04 in)	76 years	20 of 100 (Routine)
21 July 2003	Roros, NO	daily high max	26.0 C (78.8 F)	0.7 C (1.3 F)	8 years	7 of 100 (Routine)
18 July 2003	Roros, NO	daily high max	27.5 C (81.5 F)	3.3 C (5.9 F)	37 years	22 of 100 (Routine)
17 July 2003	Roros, NO	daily high max	28.5 C (83.3 F)	4.6 C (8.3 F)	46 years	28 of 100 (Routine)
16 July 2003	Roros, NO	daily high max	28.4 C (83.1 F)	3.7 C (6.7 F)	30 years	21 of 100 (Routine)
15 July 2003	Roros, NO	daily high max	28.5 C (83.3 F)	3.3 C (5.9 F)	20 years	17 of 100 (Routine)
15 June 2003	Roros, NO	daily low min	-3.5 C (25.7 F)	1.6 C (2.9 F)	9 years	15 of 100 (Routine)
6 June 2003	Roros, NO	daily rain	20.0 mm (0.8 in)	9.2 mm (0.36 in)	21 years	20 of 100 (Routine)
4 June 2003	Roros, NO	daily high min	12.0 C (53.6 F)	1.5 C (2.7 F)	10 years	16 of 100 (Routine)
3 June 2003	Roros, NO	daily high max	25.5 C (77.9 F)	0.2 C (0.4 F)	20 years	10 of 100 (Routine)
2 June 2003	Roros, NO	daily high max	25.5 C (77.9 F)	1.2 C (2.2 F)	10 years	9 of 100 (Routine)
23 April 2003	Roros, NO	daily high max	11.4 C (52.5 F)	0.9 C (1.6 F)	0 years	6 of 100 (Routine)
22 April 2003	Roros, NO	daily high max	12.3 C (54.1 F)	0.4 C (0.7 F)	0 years	5 of 100 (Routine)
21 April 2003	Roros, NO	daily high max	13.5 C (56.3 F)	1.2 C (2.2 F)	0 years	7 of 100 (Routine)
19 April 2003	Roros, NO	daily high max	14.5 C (58.1 F)	1.2 C (2.2 F)	38 years	18 of 100 (Routine)
18 April 2003	Roros, NO	daily high max	13.0 C (55.4 F)	0.3 C (0.5 F)	6 years	6 of 100 (Routine)
16 April 2003	Roros, NO	daily high max	11.7 C (53.1 F)	1.2 C (2.2 F)	40 years	19 of 100 (Routine)
26 March 2003	Roros, NO	daily high max	10.0 C (50.0 F)	1.6 C (2.9 F)	28 years	15 of 100 (Routine)

Climate Trend

48 complete years, 1955 to 2002

One stripe for each of 48 complete years at Roros, 1955 to 2002. Blue stripes are years cooler than the station's own mean of 0.5 C (33.0 F); red stripes are warmer. The coolest year was 1966, at -1.5 C (29.4 F), and the warmest was 2000, at 2.6 C (36.6 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Roros as warming stripes, 1955 to 2002
Year	Annual mean temperature	Difference from the station mean
1955	-0.3 C	-0.81 C
1956	-0.5 C	-1.05 C
1957	0.4 C	-0.16 C
1958	-0.8 C	-1.31 C
1959	1.9 C	+1.37 C
1960	0.1 C	-0.48 C
1961	1.2 C	+0.71 C
1962	-0.5 C	-1.06 C
1963	0.3 C	-0.28 C
1964	0.9 C	+0.33 C
1965	-0.5 C	-1.02 C
1966	-1.5 C	-1.99 C
1967	0.7 C	+0.13 C
1968	-0.6 C	-1.14 C
1969	-0.6 C	-1.15 C
1970	-0.8 C	-1.29 C
1971	1.0 C	+0.51 C
1972	0.8 C	+0.29 C
1973	1.3 C	+0.77 C
1974	1.4 C	+0.83 C
1975	2.0 C	+1.51 C
1976	0.0 C	-0.54 C
1977	0.0 C	-0.57 C
1978	-0.4 C	-0.97 C
1979	-0.7 C	-1.26 C
1980	-0.3 C	-0.84 C
1981	-0.7 C	-1.28 C
1982	0.8 C	+0.24 C
1983	1.8 C	+1.24 C
1984	1.1 C	+0.56 C
1985	-1.0 C	-1.50 C
1986	0.0 C	-0.50 C
1987	-0.4 C	-0.92 C
1988	1.7 C	+1.12 C
1989	2.3 C	+1.72 C
1990	2.5 C	+1.94 C
1991	1.4 C	+0.83 C
1992	1.6 C	+1.05 C
1993	0.3 C	-0.27 C
1994	0.6 C	+0.04 C
1995	0.8 C	+0.22 C
1996	-0.5 C	-1.06 C
1997	1.4 C	+0.83 C
1998	1.1 C	+0.52 C
1999	1.8 C	+1.29 C
2000	2.6 C	+2.04 C
2001	0.7 C	+0.18 C
2002	1.8 C	+1.24 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1955 to 2002. In Fahrenheit: 0.6 F (0.2 to 0.9) per decade. The slope is a straight line fitted to 48 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Roros
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.1 to 0.5) per decade	0.6 F (0.2 to 0.9) per decade	1955 to 2002	48	Rise
Mean daily maximum	0.23 C (0.04 to 0.42) per decade	0.4 F (0.1 to 0.8) per decade	1955 to 2002	48	Rise
Mean daily minimum	0.4 C (0.2 to 0.6) per decade	0.7 F (0.3 to 1.1) per decade	1955 to 2002	48	Rise

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

1895 to 2003

Yearly extremes at Roros: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	29.9 C (85.8 F)	1991	26.2 C (79.2 F)	49
Coldest night (TNn)	-50.6 C (-59.1 F)	1914	-37.6 C (-35.7 F)	93
Wettest day (Rx1day)	64.0 mm (2.5 in)	1956	21.9 mm (0.9 in)	109
Wettest five days (Rx5day)	108.8 mm (4.3 in)	1989	42.8 mm (1.7 in)	109
Longest dry spell (CDD)	59 days	1941	22 days	109

Hottest day (TXx)

The hottest day of the year at Roros, 1895 to 2003. The record is 29.9 C (85.8 F) in 1991, marked on the chart; the median year is 26.2 C (79.2 F).

Hottest day (TXx) at Roros by year
Year	Hottest day (TXx)
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
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	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	29.2 C (84.6 F)
1956	25.0 C (77.0 F)
1957	25.5 C (77.9 F)
1958	27.5 C (81.5 F)
1959	26.0 C (78.8 F)
1960	26.9 C (80.4 F)
1961	25.8 C (78.4 F)
1962	22.8 C (73.0 F)
1963	25.5 C (77.9 F)
1964	23.7 C (74.7 F)
1965	25.3 C (77.5 F)
1966	27.3 C (81.1 F)
1967	24.5 C (76.1 F)
1968	28.2 C (82.8 F)
1969	28.0 C (82.4 F)
1970	27.6 C (81.7 F)
1971	26.6 C (79.9 F)
1972	27.2 C (81.0 F)
1973	27.1 C (80.8 F)
1974	25.4 C (77.7 F)
1975	29.8 C (85.6 F)
1976	25.2 C (77.4 F)
1977	25.8 C (78.4 F)
1978	26.1 C (79.0 F)
1979	26.1 C (79.0 F)
1980	26.0 C (78.8 F)
1981	26.4 C (79.5 F)
1982	28.9 C (84.0 F)
1983	28.3 C (82.9 F)
1984	26.8 C (80.2 F)
1985	24.5 C (76.1 F)
1986	28.1 C (82.6 F)
1987	25.2 C (77.4 F)
1988	29.2 C (84.6 F)
1989	26.2 C (79.2 F)
1990	25.2 C (77.4 F)
1991	29.9 C (85.8 F)
1992	24.9 C (76.8 F)
1993	22.6 C (72.7 F)
1994	27.6 C (81.7 F)
1995	26.0 C (78.8 F)
1996	24.2 C (75.6 F)
1997	26.3 C (79.3 F)
1998	21.9 C (71.4 F)
1999	27.0 C (80.6 F)
2000	24.5 C (76.1 F)
2001	28.0 C (82.4 F)
2002	26.5 C (79.7 F)
2003	28.5 C (83.3 F)

Coldest night (TNn)

The coldest night of the year at Roros, 1895 to 2003. The record is -50.6 C (-59.1 F) in 1914, marked on the chart; the median year is -37.6 C (-35.7 F).

Coldest night (TNn) at Roros by year
Year	Coldest night (TNn)
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	-34.0 C (-29.2 F)
1912	-41.3 C (-42.3 F)
1913	-43.2 C (-45.8 F)
1914	-50.6 C (-59.1 F)
1915	-38.2 C (-36.8 F)
1916	-35.6 C (-32.1 F)
1917	-37.6 C (-35.7 F)
1918	-35.9 C (-32.6 F)
1919	-38.1 C (-36.6 F)
1920	-26.9 C (-16.4 F)
1921	-30.0 C (-22.0 F)
1922	-40.0 C (-40.0 F)
1923	-41.0 C (-41.8 F)
1924	-34.6 C (-30.3 F)
1925	-38.0 C (-36.4 F)
1926	-38.2 C (-36.8 F)
1927	-35.4 C (-31.7 F)
1928	-37.3 C (-35.1 F)
1929	-37.6 C (-35.7 F)
1930	-28.8 C (-19.8 F)
1931	-37.8 C (-36.0 F)
1932	-38.8 C (-37.8 F)
1933	-39.8 C (-39.6 F)
1934	-30.9 C (-23.6 F)
1935	-35.8 C (-32.4 F)
1936	-31.8 C (-25.2 F)
1937	-34.4 C (-29.9 F)
1938	-29.8 C (-21.6 F)
1939	-39.1 C (-38.4 F)
1940	-43.5 C (-46.3 F)
1941	-47.5 C (-53.5 F)
1942	-42.8 C (-45.0 F)
1943	-31.0 C (-23.8 F)
1944	-42.3 C (-44.1 F)
1945	-36.9 C (-34.4 F)
1946	-36.9 C (-34.4 F)
1947	-40.0 C (-40.0 F)
1948	-39.8 C (-39.6 F)
1949	-37.8 C (-36.0 F)
1950	-34.8 C (-30.6 F)
1951	-40.3 C (-40.5 F)
1952	-34.4 C (-29.9 F)
1953	-42.6 C (-44.7 F)
1954	-40.1 C (-40.2 F)
1955	-39.4 C (-38.9 F)
1956	-38.7 C (-37.7 F)
1957	-37.0 C (-34.6 F)
1958	-41.5 C (-42.7 F)
1959	-33.0 C (-27.4 F)
1960	-37.1 C (-34.8 F)
1961	-36.7 C (-34.1 F)
1962	-37.5 C (-35.5 F)
1963	-38.5 C (-37.3 F)
1964	-34.5 C (-30.1 F)
1965	-37.8 C (-36.0 F)
1966	-41.6 C (-42.9 F)
1967	-36.8 C (-34.2 F)
1968	-33.8 C (-28.8 F)
1969	-40.3 C (-40.5 F)
1970	-38.4 C (-37.1 F)
1971	-33.1 C (-27.6 F)
1972	-32.8 C (-27.0 F)
1973	-28.3 C (-18.9 F)
1974	-32.0 C (-25.6 F)
1975	-32.0 C (-25.6 F)
1976	-33.2 C (-27.8 F)
1977	-34.0 C (-29.2 F)
1978	-44.0 C (-47.2 F)
1979	-45.8 C (-50.4 F)
1980	-39.0 C (-38.2 F)
1981	-40.7 C (-41.3 F)
1982	-42.9 C (-45.2 F)
1983	-31.0 C (-23.8 F)
1984	-40.2 C (-40.4 F)
1985	-42.5 C (-44.5 F)
1986	-39.8 C (-39.6 F)
1987	-45.2 C (-49.4 F)
1988	-30.7 C (-23.3 F)
1989	-40.0 C (-40.0 F)
1990	-33.2 C (-27.8 F)
1991	-32.2 C (-26.0 F)
1992	-30.0 C (-22.0 F)
1993	-34.5 C (-30.1 F)
1994	-32.8 C (-27.0 F)
1995	-32.8 C (-27.0 F)
1996	-39.4 C (-38.9 F)
1997	-40.0 C (-40.0 F)
1998	-35.4 C (-31.7 F)
1999	-36.6 C (-33.9 F)
2000	-33.2 C (-27.8 F)
2001	-38.8 C (-37.8 F)
2002	-34.5 C (-30.1 F)
2003	-37.8 C (-36.0 F)

Wettest day (Rx1day)

The wettest day of the year at Roros, 1895 to 2003. The record is 64.0 mm (2.5 in) in 1956, marked on the chart; the median year is 21.9 mm (0.9 in).

Wettest day (Rx1day) at Roros by year
Year	Wettest day (Rx1day)
1895	44.0 mm (1.7 in)
1896	50.0 mm (2.0 in)
1897	25.8 mm (1.0 in)
1898	22.5 mm (0.9 in)
1899	22.0 mm (0.9 in)
1900	12.0 mm (0.5 in)
1901	16.5 mm (0.6 in)
1902	20.0 mm (0.8 in)
1903	35.4 mm (1.4 in)
1904	18.1 mm (0.7 in)
1905	23.4 mm (0.9 in)
1906	27.5 mm (1.1 in)
1907	16.0 mm (0.6 in)
1908	18.0 mm (0.7 in)
1909	20.0 mm (0.8 in)
1910	14.5 mm (0.6 in)
1911	20.0 mm (0.8 in)
1912	51.5 mm (2.0 in)
1913	19.4 mm (0.8 in)
1914	21.5 mm (0.8 in)
1915	34.0 mm (1.3 in)
1916	29.0 mm (1.1 in)
1917	39.5 mm (1.6 in)
1918	48.2 mm (1.9 in)
1919	21.9 mm (0.9 in)
1920	14.3 mm (0.6 in)
1921	45.6 mm (1.8 in)
1922	24.1 mm (0.9 in)
1923	12.0 mm (0.5 in)
1924	26.0 mm (1.0 in)
1925	15.4 mm (0.6 in)
1926	20.2 mm (0.8 in)
1927	20.0 mm (0.8 in)
1928	26.7 mm (1.1 in)
1929	29.3 mm (1.2 in)
1930	18.7 mm (0.7 in)
1931	21.9 mm (0.9 in)
1932	19.1 mm (0.8 in)
1933	27.6 mm (1.1 in)
1934	42.6 mm (1.7 in)
1935	40.0 mm (1.6 in)
1936	29.6 mm (1.2 in)
1937	19.5 mm (0.8 in)
1938	26.8 mm (1.1 in)
1939	33.7 mm (1.3 in)
1940	57.4 mm (2.3 in)
1941	31.6 mm (1.2 in)
1942	16.3 mm (0.6 in)
1943	27.8 mm (1.1 in)
1944	27.4 mm (1.1 in)
1945	18.5 mm (0.7 in)
1946	18.4 mm (0.7 in)
1947	24.0 mm (0.9 in)
1948	20.9 mm (0.8 in)
1949	27.0 mm (1.1 in)
1950	21.0 mm (0.8 in)
1951	33.8 mm (1.3 in)
1952	32.1 mm (1.3 in)
1953	36.9 mm (1.5 in)
1954	38.5 mm (1.5 in)
1955	16.8 mm (0.7 in)
1956	64.0 mm (2.5 in)
1957	25.9 mm (1.0 in)
1958	21.6 mm (0.9 in)
1959	20.1 mm (0.8 in)
1960	22.0 mm (0.9 in)
1961	21.4 mm (0.8 in)
1962	26.7 mm (1.1 in)
1963	36.8 mm (1.4 in)
1964	35.0 mm (1.4 in)
1965	15.4 mm (0.6 in)
1966	15.1 mm (0.6 in)
1967	21.5 mm (0.8 in)
1968	16.6 mm (0.7 in)
1969	15.3 mm (0.6 in)
1970	26.6 mm (1.0 in)
1971	34.0 mm (1.3 in)
1972	20.4 mm (0.8 in)
1973	31.0 mm (1.2 in)
1974	17.8 mm (0.7 in)
1975	26.0 mm (1.0 in)
1976	17.4 mm (0.7 in)
1977	19.2 mm (0.8 in)
1978	18.0 mm (0.7 in)
1979	11.8 mm (0.5 in)
1980	20.9 mm (0.8 in)
1981	20.7 mm (0.8 in)
1982	18.7 mm (0.7 in)
1983	18.5 mm (0.7 in)
1984	47.7 mm (1.9 in)
1985	22.8 mm (0.9 in)
1986	20.0 mm (0.8 in)
1987	24.7 mm (1.0 in)
1988	39.6 mm (1.6 in)
1989	60.0 mm (2.4 in)
1990	21.5 mm (0.8 in)
1991	15.7 mm (0.6 in)
1992	21.5 mm (0.8 in)
1993	41.6 mm (1.6 in)
1994	14.3 mm (0.6 in)
1995	24.2 mm (1.0 in)
1996	21.3 mm (0.8 in)
1997	47.6 mm (1.9 in)
1998	18.3 mm (0.7 in)
1999	18.1 mm (0.7 in)
2000	16.5 mm (0.6 in)
2001	26.0 mm (1.0 in)
2002	18.6 mm (0.7 in)
2003	26.6 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Roros, 1895 to 2003. The record is 108.8 mm (4.3 in) in 1989, marked on the chart; the median year is 42.8 mm (1.7 in).

Wettest five days (Rx5day) at Roros by year
Year	Wettest five days (Rx5day)
1895	88.8 mm (3.5 in)
1896	94.1 mm (3.7 in)
1897	37.6 mm (1.5 in)
1898	26.8 mm (1.1 in)
1899	44.5 mm (1.8 in)
1900	40.1 mm (1.6 in)
1901	34.9 mm (1.4 in)
1902	43.7 mm (1.7 in)
1903	58.6 mm (2.3 in)
1904	30.0 mm (1.2 in)
1905	37.1 mm (1.5 in)
1906	52.7 mm (2.1 in)
1907	31.6 mm (1.2 in)
1908	34.7 mm (1.4 in)
1909	33.5 mm (1.3 in)
1910	20.2 mm (0.8 in)
1911	27.0 mm (1.1 in)
1912	91.9 mm (3.6 in)
1913	31.6 mm (1.2 in)
1914	29.5 mm (1.2 in)
1915	49.1 mm (1.9 in)
1916	41.2 mm (1.6 in)
1917	47.9 mm (1.9 in)
1918	94.2 mm (3.7 in)
1919	42.4 mm (1.7 in)
1920	42.8 mm (1.7 in)
1921	61.2 mm (2.4 in)
1922	30.8 mm (1.2 in)
1923	25.7 mm (1.0 in)
1924	50.4 mm (2.0 in)
1925	35.0 mm (1.4 in)
1926	30.7 mm (1.2 in)
1927	35.1 mm (1.4 in)
1928	36.5 mm (1.4 in)
1929	52.0 mm (2.0 in)
1930	34.0 mm (1.3 in)
1931	29.9 mm (1.2 in)
1932	56.7 mm (2.2 in)
1933	55.2 mm (2.2 in)
1934	65.7 mm (2.6 in)
1935	49.0 mm (1.9 in)
1936	46.1 mm (1.8 in)
1937	52.3 mm (2.1 in)
1938	53.7 mm (2.1 in)
1939	39.6 mm (1.6 in)
1940	74.1 mm (2.9 in)
1941	39.1 mm (1.5 in)
1942	31.0 mm (1.2 in)
1943	36.9 mm (1.5 in)
1944	47.4 mm (1.9 in)
1945	47.3 mm (1.9 in)
1946	34.3 mm (1.4 in)
1947	36.2 mm (1.4 in)
1948	42.4 mm (1.7 in)
1949	58.4 mm (2.3 in)
1950	52.0 mm (2.0 in)
1951	38.4 mm (1.5 in)
1952	48.3 mm (1.9 in)
1953	52.1 mm (2.1 in)
1954	67.7 mm (2.7 in)
1955	28.3 mm (1.1 in)
1956	98.7 mm (3.9 in)
1957	50.6 mm (2.0 in)
1958	35.1 mm (1.4 in)
1959	29.3 mm (1.2 in)
1960	51.8 mm (2.0 in)
1961	54.2 mm (2.1 in)
1962	53.5 mm (2.1 in)
1963	47.7 mm (1.9 in)
1964	59.3 mm (2.3 in)
1965	32.3 mm (1.3 in)
1966	43.6 mm (1.7 in)
1967	49.8 mm (2.0 in)
1968	31.6 mm (1.2 in)
1969	38.3 mm (1.5 in)
1970	40.6 mm (1.6 in)
1971	62.5 mm (2.5 in)
1972	33.5 mm (1.3 in)
1973	53.3 mm (2.1 in)
1974	46.9 mm (1.8 in)
1975	40.0 mm (1.6 in)
1976	30.0 mm (1.2 in)
1977	29.8 mm (1.2 in)
1978	38.7 mm (1.5 in)
1979	25.5 mm (1.0 in)
1980	33.9 mm (1.3 in)
1981	42.5 mm (1.7 in)
1982	32.7 mm (1.3 in)
1983	39.1 mm (1.5 in)
1984	61.4 mm (2.4 in)
1985	40.5 mm (1.6 in)
1986	53.8 mm (2.1 in)
1987	54.2 mm (2.1 in)
1988	55.9 mm (2.2 in)
1989	108.8 mm (4.3 in)
1990	46.6 mm (1.8 in)
1991	35.6 mm (1.4 in)
1992	43.3 mm (1.7 in)
1993	49.1 mm (1.9 in)
1994	34.2 mm (1.3 in)
1995	46.7 mm (1.8 in)
1996	40.5 mm (1.6 in)
1997	72.5 mm (2.9 in)
1998	46.1 mm (1.8 in)
1999	31.2 mm (1.2 in)
2000	51.9 mm (2.0 in)
2001	55.7 mm (2.2 in)
2002	29.7 mm (1.2 in)
2003	68.6 mm (2.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Roros, 1895 to 2003. The record is 59 days in 1941, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Roros by year
Year	Longest dry spell (CDD)
1895	26 days
1896	23 days
1897	23 days
1898	16 days
1899	23 days
1900	21 days
1901	36 days
1902	36 days
1903	20 days
1904	45 days
1905	19 days
1906	18 days
1907	24 days
1908	25 days
1909	15 days
1910	17 days
1911	22 days
1912	19 days
1913	26 days
1914	31 days
1915	23 days
1916	15 days
1917	15 days
1918	22 days
1919	22 days
1920	42 days
1921	21 days
1922	37 days
1923	40 days
1924	19 days
1925	16 days
1926	11 days
1927	16 days
1928	37 days
1929	22 days
1930	18 days
1931	19 days
1932	13 days
1933	25 days
1934	27 days
1935	23 days
1936	22 days
1937	34 days
1938	15 days
1939	25 days
1940	22 days
1941	59 days
1942	27 days
1943	14 days
1944	12 days
1945	18 days
1946	27 days
1947	27 days
1948	34 days
1949	15 days
1950	27 days
1951	30 days
1952	19 days
1953	25 days
1954	33 days
1955	19 days
1956	28 days
1957	23 days
1958	18 days
1959	21 days
1960	23 days
1961	20 days
1962	17 days
1963	23 days
1964	44 days
1965	15 days
1966	24 days
1967	19 days
1968	25 days
1969	22 days
1970	22 days
1971	15 days
1972	42 days
1973	15 days
1974	36 days
1975	15 days
1976	22 days
1977	17 days
1978	19 days
1979	16 days
1980	23 days
1981	28 days
1982	19 days
1983	19 days
1984	21 days
1985	19 days
1986	25 days
1987	20 days
1988	28 days
1989	25 days
1990	31 days
1991	31 days
1992	25 days
1993	23 days
1994	19 days
1995	17 days
1996	31 days
1997	19 days
1998	21 days
1999	28 days
2000	22 days
2001	20 days
2002	29 days
2003	49 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.

Frost Dates and Growing Season

48 years with a frost

Across 48 years with a frost, the median last spring frost at Roros falls on 13 June and the median first autumn frost on 12 August, which leaves a median of 58 days between them.

Fitted over all years, the growing season changes by +7.4 days per decade at this station.

Frost dates and growing season at Roros
Measure	Median, all years	Earliest period	Recent period (1973 to 2002)	Recent against earliest	Fitted trend
Last spring frost	13 June	n/a	12 June	n/a	-1.2 days per decade
First autumn frost	12 August	n/a	22 August	n/a	+6.2 days per decade
Growing days	58 days	n/a	69 days	n/a	+7.4 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

107 years, 1896 to 2002

A day with at least 22.9 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 70.1 mm (2.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Roros: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	22.9 mm (0.9 in)
5 years	31.8 mm (1.3 in)
10 years	39.0 mm (1.5 in)
25 years	49.7 mm (2.0 in)
50 years	59.2 mm (2.3 in)
100 years	70.1 mm (2.8 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 107 years of values from 1896 to 2002.

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: 64.0 mm (2.5 in) in 1956; 60.0 mm (2.4 in) in 1989; 57.4 mm (2.3 in) in 1940.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Roros, at 1967 and 1991. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1967 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1991 ran 0.2 C (0.4 F) lower than in the years before (possible change).

Suspected changes in the annual mean temperature at Roros, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1967	+0.3	+0.5	possible	5
1991	-0.2	-0.4	possible	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

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

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).