Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Stykkisholmur. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Stykkisholmur, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
10.9 C (51.6 F)
-16.0 C (3.2 F)
8.2 C (46.8 F)
-8.7 C (16.3 F)
Feb
11.7 C (53.1 F)
-17.7 C (0.1 F)
5.8 C (42.4 F)
-10.6 C (12.9 F)
Mar
12.2 C (54.0 F)
-19.0 C (-2.2 F)
7.1 C (44.8 F)
-7.5 C (18.5 F)
Apr
16.4 C (61.5 F)
-16.0 C (3.2 F)
13.0 C (55.4 F)
-5.7 C (21.7 F)
May
20.5 C (68.9 F)
-6.7 C (19.9 F)
14.4 C (57.9 F)
-2.8 C (27.0 F)
Jun
22.0 C (71.6 F)
-0.8 C (30.6 F)
17.8 C (64.0 F)
4.3 C (39.7 F)
Jul
21.0 C (69.8 F)
2.0 C (35.6 F)
18.6 C (65.5 F)
4.3 C (39.7 F)
Aug
20.8 C (69.4 F)
0.5 C (32.9 F)
16.4 C (61.5 F)
5.0 C (41.0 F)
Sep
18.5 C (65.3 F)
-4.9 C (23.2 F)
n/a
n/a
Oct
15.7 C (60.3 F)
-8.0 C (17.6 F)
n/a
n/a
Nov
13.3 C (55.9 F)
-11.8 C (10.8 F)
n/a
n/a
Dec
13.4 C (56.1 F)
-14.8 C (5.4 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Stykkisholmur still stand. 1969 holds the most, with 49.
Standing records at Stykkisholmur by the year they were set
Year set
Standing records
1949
46
1950
20
1951
24
1952
12
1953
10
1954
16
1955
17
1956
28
1957
15
1958
18
1959
26
1960
18
1961
9
1962
9
1963
26
1964
26
1965
36
1966
15
1967
29
1968
45
1969
49
1970
23
1971
34
1972
11
1973
36
1974
11
1975
22
1976
15
1977
13
1978
6
1979
20
1980
20
1981
28
1982
14
1983
10
1984
8
1985
13
1986
5
1987
14
1988
14
1989
11
1990
9
1991
8
1992
24
1993
13
1994
8
1995
15
1996
16
1997
20
1998
17
1999
14
2000
10
2001
24
2002
22
2003
18
2004
37
2005
19
2006
25
2007
29
2008
14
2009
18
2010
38
2011
13
2012
15
2013
18
2014
17
2015
7
2016
9
2017
17
2018
11
2019
28
2020
5
2021
13
2022
12
2023
17
2024
25
2025
33
2026
4
All-Time Record Progression
3 new records
3 all-time records were set at Stykkisholmur between 31 July 1980 and 15 August 2010. Each dot is a new record.
When Stykkisholmur set new all-time records
Date
Kind
Detail
1980-07-31
Record high minimum temperature
Record high minimum temperature 14.5 C (58.1 F)
2008-09-17
Record daily precipitation
Record daily precipitation 68.0 mm (2.7 in)
2010-08-15
Record high minimum temperature
Record high minimum temperature 15.3 C (59.5 F)
Wettest Day of Each Month
Sep: 68.0 mm (2.7 in)
The wettest day on record for each calendar month at Stykkisholmur. The most was 68.0 mm (2.7 in) on 17 September 2008.
Record daily precipitation for each month at Stykkisholmur
Month
Record daily precipitation (mm)
Date
Jan
43.4 mm (1.7 in)
24 January 1992
Feb
49.0 mm (1.9 in)
13 February 2023
Mar
56.6 mm (2.2 in)
5 March 1974
Apr
31.0 mm (1.2 in)
7 April 1969
May
39.0 mm (1.5 in)
25 May 2024
Jun
46.5 mm (1.8 in)
12 June 2006
Jul
32.6 mm (1.3 in)
18 July 2025
Aug
55.2 mm (2.2 in)
30 August 2013
Sep
68.0 mm (2.7 in)
17 September 2008
Oct
48.5 mm (1.9 in)
20 October 1965
Nov
61.2 mm (2.4 in)
18 November 1958
Dec
55.6 mm (2.2 in)
18 December 2007
Period of Record Coverage
1949 to 2026
Complete yearUnder 90 percent of days
78 years of record at Stykkisholmur, 1949 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 77 complete years at Stykkisholmur, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 4.2 C (39.6 F); red stripes are warmer. The coolest year was 1979, at 2.7 C (36.8 F), and the warmest was 2025, at 5.9 C (42.7 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Stykkisholmur as warming stripes, 1949 to 2025
Year
Annual mean temperature
Difference from the station mean
1949
3.6 C
-0.68 C
1950
4.3 C
+0.02 C
1951
3.7 C
-0.56 C
1952
3.7 C
-0.55 C
1953
4.5 C
+0.29 C
1954
4.1 C
-0.20 C
1955
3.8 C
-0.47 C
1956
4.5 C
+0.29 C
1957
4.3 C
+0.03 C
1958
4.0 C
-0.21 C
1959
4.3 C
+0.07 C
1960
5.0 C
+0.72 C
1961
4.3 C
+0.06 C
1962
4.0 C
-0.30 C
1963
3.8 C
-0.42 C
1964
4.9 C
+0.65 C
1965
3.9 C
-0.31 C
1966
3.2 C
-1.09 C
1967
3.2 C
-1.08 C
1968
3.4 C
-0.82 C
1969
2.8 C
-1.46 C
1970
3.3 C
-0.97 C
1971
3.4 C
-0.86 C
1972
4.6 C
+0.31 C
1973
3.3 C
-0.94 C
1974
4.5 C
+0.28 C
1975
3.6 C
-0.68 C
1976
4.3 C
+0.07 C
1977
3.9 C
-0.39 C
1978
4.2 C
-0.08 C
1979
2.7 C
-1.57 C
1980
4.3 C
+0.03 C
1981
2.9 C
-1.40 C
1982
3.5 C
-0.80 C
1983
2.9 C
-1.37 C
1984
3.8 C
-0.47 C
1985
4.0 C
-0.28 C
1986
3.6 C
-0.64 C
1987
4.8 C
+0.59 C
1988
3.6 C
-0.70 C
1989
3.6 C
-0.67 C
1990
4.1 C
-0.11 C
1991
4.8 C
+0.54 C
1992
4.1 C
-0.13 C
1993
4.0 C
-0.26 C
1994
3.6 C
-0.66 C
1995
3.2 C
-1.08 C
1996
4.5 C
+0.28 C
1997
4.3 C
+0.05 C
1998
3.9 C
-0.34 C
1999
3.9 C
-0.36 C
2000
4.3 C
+0.04 C
2001
4.8 C
+0.53 C
2002
4.7 C
+0.48 C
2003
5.8 C
+1.56 C
2004
5.4 C
+1.11 C
2005
4.8 C
+0.50 C
2006
5.1 C
+0.86 C
2007
5.3 C
+1.01 C
2008
5.1 C
+0.85 C
2009
5.0 C
+0.78 C
2010
5.7 C
+1.40 C
2011
4.7 C
+0.47 C
2012
5.0 C
+0.75 C
2013
4.6 C
+0.31 C
2014
5.5 C
+1.23 C
2015
4.2 C
-0.01 C
2016
5.7 C
+1.44 C
2017
5.2 C
+0.90 C
2018
4.7 C
+0.45 C
2019
5.1 C
+0.86 C
2020
4.6 C
+0.39 C
2021
4.9 C
+0.60 C
2022
4.7 C
+0.43 C
2023
4.5 C
+0.25 C
2024
3.8 C
-0.41 C
2025
5.9 C
+1.68 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1949 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 77 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Stykkisholmur
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1949 to 2025
77
Rise
Mean daily maximum
0.2 C (0.2 to 0.3) per decade
0.4 F (0.3 to 0.5) per decade
1949 to 2025
77
Rise
Mean daily minimum
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.4) per decade
1949 to 2025
77
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
1949 to 2026
Yearly extremes at Stykkisholmur: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
22.0 C (71.6 F)
1949
17.5 C (63.5 F)
78
Coldest night (TNn)
-19.0 C (-2.2 F)
1969
-11.4 C (11.5 F)
78
Wettest day (Rx1day)
68.0 mm (2.7 in)
2008
31.0 mm (1.2 in)
78
Wettest five days (Rx5day)
125.1 mm (4.9 in)
1958
59.2 mm (2.3 in)
78
Longest dry spell (CDD)
38 days
1977
17 days
78
Hottest day (TXx)
The hottest day of the year at Stykkisholmur, 1949 to 2026. The record is 22.0 C (71.6 F) in 1949, marked on the chart; the median year is 17.5 C (63.5 F).
Hottest day (TXx) at Stykkisholmur by year
Year
Hottest day (TXx)
1949
22.0 C (71.6 F)
1950
20.0 C (68.0 F)
1951
19.3 C (66.7 F)
1952
17.0 C (62.6 F)
1953
16.4 C (61.5 F)
1954
16.0 C (60.8 F)
1955
17.0 C (62.6 F)
1956
15.5 C (59.9 F)
1957
15.7 C (60.3 F)
1958
17.0 C (62.6 F)
1959
17.0 C (62.6 F)
1960
16.8 C (62.2 F)
1961
15.6 C (60.1 F)
1962
15.0 C (59.0 F)
1963
15.0 C (59.0 F)
1964
15.4 C (59.7 F)
1965
17.0 C (62.6 F)
1966
16.2 C (61.2 F)
1967
18.0 C (64.4 F)
1968
16.8 C (62.2 F)
1969
16.5 C (61.7 F)
1970
15.2 C (59.4 F)
1971
16.1 C (61.0 F)
1972
14.8 C (58.6 F)
1973
16.0 C (60.8 F)
1974
16.6 C (61.9 F)
1975
17.5 C (63.5 F)
1976
20.0 C (68.0 F)
1977
19.0 C (66.2 F)
1978
18.8 C (65.8 F)
1979
15.8 C (60.4 F)
1980
21.0 C (69.8 F)
1981
16.1 C (61.0 F)
1982
16.8 C (62.2 F)
1983
16.5 C (61.7 F)
1984
17.9 C (64.2 F)
1985
17.0 C (62.6 F)
1986
16.0 C (60.8 F)
1987
16.0 C (60.8 F)
1988
15.5 C (59.9 F)
1989
17.4 C (63.3 F)
1990
18.5 C (65.3 F)
1991
19.6 C (67.3 F)
1992
16.0 C (60.8 F)
1993
16.4 C (61.5 F)
1994
16.8 C (62.2 F)
1995
16.0 C (60.8 F)
1996
17.5 C (63.5 F)
1997
18.5 C (65.3 F)
1998
18.2 C (64.8 F)
1999
17.5 C (63.5 F)
2000
18.0 C (64.4 F)
2001
16.5 C (61.7 F)
2002
21.0 C (69.8 F)
2003
17.6 C (63.7 F)
2004
20.4 C (68.7 F)
2005
18.7 C (65.7 F)
2006
17.4 C (63.3 F)
2007
20.5 C (68.9 F)
2008
19.6 C (67.3 F)
2009
18.7 C (65.7 F)
2010
18.6 C (65.5 F)
2011
18.5 C (65.3 F)
2012
19.0 C (66.2 F)
2013
17.0 C (62.6 F)
2014
17.7 C (63.9 F)
2015
17.5 C (63.5 F)
2016
17.5 C (63.5 F)
2017
20.9 C (69.6 F)
2018
20.4 C (68.7 F)
2019
20.0 C (68.0 F)
2020
19.0 C (66.2 F)
2021
20.1 C (68.2 F)
2022
18.0 C (64.4 F)
2023
18.6 C (65.5 F)
2024
17.8 C (64.0 F)
2025
20.8 C (69.4 F)
2026
18.6 C (65.5 F)
Coldest night (TNn)
The coldest night of the year at Stykkisholmur, 1949 to 2026. The record is -19.0 C (-2.2 F) in 1969, marked on the chart; the median year is -11.4 C (11.5 F).
Coldest night (TNn) at Stykkisholmur by year
Year
Coldest night (TNn)
1949
-14.2 C (6.4 F)
1950
-12.0 C (10.4 F)
1951
-11.4 C (11.5 F)
1952
-9.0 C (15.8 F)
1953
-10.4 C (13.3 F)
1954
-9.7 C (14.5 F)
1955
-13.0 C (8.6 F)
1956
-14.4 C (6.1 F)
1957
-10.2 C (13.6 F)
1958
-9.5 C (14.9 F)
1959
-11.0 C (12.2 F)
1960
-11.0 C (12.2 F)
1961
-13.0 C (8.6 F)
1962
-9.7 C (14.5 F)
1963
-11.0 C (12.2 F)
1964
-12.4 C (9.7 F)
1965
-12.2 C (10.0 F)
1966
-13.0 C (8.6 F)
1967
-11.0 C (12.2 F)
1968
-16.2 C (2.8 F)
1969
-19.0 C (-2.2 F)
1970
-14.0 C (6.8 F)
1971
-16.0 C (3.2 F)
1972
-9.5 C (14.9 F)
1973
-14.8 C (5.4 F)
1974
-12.9 C (8.8 F)
1975
-12.4 C (9.7 F)
1976
-13.4 C (7.9 F)
1977
-12.8 C (9.0 F)
1978
-11.4 C (11.5 F)
1979
-15.1 C (4.8 F)
1980
-11.1 C (12.0 F)
1981
-15.1 C (4.8 F)
1982
-11.6 C (11.1 F)
1983
-13.3 C (8.1 F)
1984
-14.8 C (5.4 F)
1985
-10.6 C (12.9 F)
1986
-10.6 C (12.9 F)
1987
-9.9 C (14.2 F)
1988
-12.2 C (10.0 F)
1989
-11.5 C (11.3 F)
1990
-12.0 C (10.4 F)
1991
-8.8 C (16.2 F)
1992
-12.5 C (9.5 F)
1993
-13.0 C (8.6 F)
1994
-12.3 C (9.9 F)
1995
-12.5 C (9.5 F)
1996
-9.5 C (14.9 F)
1997
-11.8 C (10.8 F)
1998
-14.9 C (5.2 F)
1999
-9.9 C (14.2 F)
2000
-10.7 C (12.7 F)
2001
-11.0 C (12.2 F)
2002
-11.7 C (10.9 F)
2003
-9.6 C (14.7 F)
2004
-13.9 C (7.0 F)
2005
-11.3 C (11.7 F)
2006
-11.8 C (10.8 F)
2007
-10.0 C (14.0 F)
2008
-14.7 C (5.5 F)
2009
-9.5 C (14.9 F)
2010
-8.9 C (16.0 F)
2011
-11.4 C (11.5 F)
2012
-8.5 C (16.7 F)
2013
-12.3 C (9.9 F)
2014
-10.1 C (13.8 F)
2015
-10.3 C (13.5 F)
2016
-9.9 C (14.2 F)
2017
-10.2 C (13.6 F)
2018
-10.6 C (12.9 F)
2019
-11.2 C (11.8 F)
2020
-9.6 C (14.7 F)
2021
-10.2 C (13.6 F)
2022
-12.8 C (9.0 F)
2023
-10.5 C (13.1 F)
2024
-11.5 C (11.3 F)
2025
-10.9 C (12.4 F)
2026
-10.6 C (12.9 F)
Wettest day (Rx1day)
The wettest day of the year at Stykkisholmur, 1949 to 2026. The record is 68.0 mm (2.7 in) in 2008, marked on the chart; the median year is 31.0 mm (1.2 in).
Wettest day (Rx1day) at Stykkisholmur by year
Year
Wettest day (Rx1day)
1949
22.1 mm (0.9 in)
1950
28.8 mm (1.1 in)
1951
17.7 mm (0.7 in)
1952
26.7 mm (1.1 in)
1953
37.3 mm (1.5 in)
1954
24.7 mm (1.0 in)
1955
22.5 mm (0.9 in)
1956
44.5 mm (1.8 in)
1957
22.6 mm (0.9 in)
1958
61.2 mm (2.4 in)
1959
30.1 mm (1.2 in)
1960
47.3 mm (1.9 in)
1961
22.1 mm (0.9 in)
1962
42.8 mm (1.7 in)
1963
30.8 mm (1.2 in)
1964
21.5 mm (0.8 in)
1965
48.5 mm (1.9 in)
1966
44.7 mm (1.8 in)
1967
31.8 mm (1.3 in)
1968
40.8 mm (1.6 in)
1969
31.0 mm (1.2 in)
1970
33.5 mm (1.3 in)
1971
31.3 mm (1.2 in)
1972
38.0 mm (1.5 in)
1973
22.3 mm (0.9 in)
1974
56.6 mm (2.2 in)
1975
29.8 mm (1.2 in)
1976
24.5 mm (1.0 in)
1977
28.2 mm (1.1 in)
1978
30.4 mm (1.2 in)
1979
28.9 mm (1.1 in)
1980
26.1 mm (1.0 in)
1981
21.4 mm (0.8 in)
1982
23.7 mm (0.9 in)
1983
31.9 mm (1.3 in)
1984
49.3 mm (1.9 in)
1985
36.5 mm (1.4 in)
1986
29.8 mm (1.2 in)
1987
39.4 mm (1.6 in)
1988
24.1 mm (0.9 in)
1989
42.7 mm (1.7 in)
1990
30.3 mm (1.2 in)
1991
40.6 mm (1.6 in)
1992
43.4 mm (1.7 in)
1993
38.8 mm (1.5 in)
1994
32.6 mm (1.3 in)
1995
31.5 mm (1.2 in)
1996
30.2 mm (1.2 in)
1997
30.0 mm (1.2 in)
1998
27.1 mm (1.1 in)
1999
43.8 mm (1.7 in)
2000
42.2 mm (1.7 in)
2001
25.3 mm (1.0 in)
2002
25.1 mm (1.0 in)
2003
17.7 mm (0.7 in)
2004
32.5 mm (1.3 in)
2005
22.8 mm (0.9 in)
2006
46.5 mm (1.8 in)
2007
55.6 mm (2.2 in)
2008
68.0 mm (2.7 in)
2009
24.6 mm (1.0 in)
2010
22.4 mm (0.9 in)
2011
31.0 mm (1.2 in)
2012
21.3 mm (0.8 in)
2013
55.2 mm (2.2 in)
2014
20.0 mm (0.8 in)
2015
30.0 mm (1.2 in)
2016
35.6 mm (1.4 in)
2017
37.8 mm (1.5 in)
2018
39.6 mm (1.6 in)
2019
44.0 mm (1.7 in)
2020
30.2 mm (1.2 in)
2021
29.9 mm (1.2 in)
2022
29.8 mm (1.2 in)
2023
49.0 mm (1.9 in)
2024
39.0 mm (1.5 in)
2025
37.1 mm (1.5 in)
2026
35.4 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Stykkisholmur, 1949 to 2026. The record is 125.1 mm (4.9 in) in 1958, marked on the chart; the median year is 59.2 mm (2.3 in).
Wettest five days (Rx5day) at Stykkisholmur by year
Year
Wettest five days (Rx5day)
1949
36.6 mm (1.4 in)
1950
65.6 mm (2.6 in)
1951
34.8 mm (1.4 in)
1952
38.8 mm (1.5 in)
1953
90.0 mm (3.5 in)
1954
75.7 mm (3.0 in)
1955
39.3 mm (1.5 in)
1956
81.0 mm (3.2 in)
1957
44.7 mm (1.8 in)
1958
125.1 mm (4.9 in)
1959
65.6 mm (2.6 in)
1960
62.9 mm (2.5 in)
1961
55.8 mm (2.2 in)
1962
76.9 mm (3.0 in)
1963
67.0 mm (2.6 in)
1964
44.7 mm (1.8 in)
1965
97.5 mm (3.8 in)
1966
61.7 mm (2.4 in)
1967
55.1 mm (2.2 in)
1968
81.9 mm (3.2 in)
1969
86.5 mm (3.4 in)
1970
70.0 mm (2.8 in)
1971
48.4 mm (1.9 in)
1972
77.8 mm (3.1 in)
1973
45.4 mm (1.8 in)
1974
90.0 mm (3.5 in)
1975
51.3 mm (2.0 in)
1976
51.8 mm (2.0 in)
1977
38.8 mm (1.5 in)
1978
41.6 mm (1.6 in)
1979
41.9 mm (1.6 in)
1980
55.6 mm (2.2 in)
1981
39.2 mm (1.5 in)
1982
50.7 mm (2.0 in)
1983
51.2 mm (2.0 in)
1984
74.7 mm (2.9 in)
1985
74.8 mm (2.9 in)
1986
43.2 mm (1.7 in)
1987
59.0 mm (2.3 in)
1988
49.9 mm (2.0 in)
1989
61.8 mm (2.4 in)
1990
51.7 mm (2.0 in)
1991
105.5 mm (4.2 in)
1992
74.4 mm (2.9 in)
1993
97.4 mm (3.8 in)
1994
75.0 mm (3.0 in)
1995
79.4 mm (3.1 in)
1996
46.9 mm (1.8 in)
1997
43.1 mm (1.7 in)
1998
55.3 mm (2.2 in)
1999
59.4 mm (2.3 in)
2000
61.7 mm (2.4 in)
2001
49.8 mm (2.0 in)
2002
53.7 mm (2.1 in)
2003
62.1 mm (2.4 in)
2004
73.1 mm (2.9 in)
2005
57.6 mm (2.3 in)
2006
63.9 mm (2.5 in)
2007
84.1 mm (3.3 in)
2008
113.8 mm (4.5 in)
2009
41.4 mm (1.6 in)
2010
35.8 mm (1.4 in)
2011
60.3 mm (2.4 in)
2012
41.3 mm (1.6 in)
2013
48.8 mm (1.9 in)
2014
41.6 mm (1.6 in)
2015
73.8 mm (2.9 in)
2016
64.4 mm (2.5 in)
2017
49.4 mm (1.9 in)
2018
49.1 mm (1.9 in)
2019
95.0 mm (3.7 in)
2020
56.4 mm (2.2 in)
2021
65.2 mm (2.6 in)
2022
58.1 mm (2.3 in)
2023
84.6 mm (3.3 in)
2024
60.2 mm (2.4 in)
2025
78.2 mm (3.1 in)
2026
47.5 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Stykkisholmur, 1949 to 2026. The record is 38 days in 1977, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Stykkisholmur by year
Year
Longest dry spell (CDD)
1949
14 days
1950
3 days
1951
24 days
1952
25 days
1953
16 days
1954
22 days
1955
19 days
1956
30 days
1957
26 days
1958
26 days
1959
24 days
1960
32 days
1961
19 days
1962
26 days
1963
29 days
1964
28 days
1965
27 days
1966
29 days
1967
29 days
1968
17 days
1969
28 days
1970
14 days
1971
31 days
1972
14 days
1973
14 days
1974
25 days
1975
13 days
1976
14 days
1977
38 days
1978
13 days
1979
22 days
1980
17 days
1981
27 days
1982
22 days
1983
24 days
1984
17 days
1985
33 days
1986
20 days
1987
30 days
1988
17 days
1989
19 days
1990
16 days
1991
27 days
1992
14 days
1993
20 days
1994
19 days
1995
30 days
1996
17 days
1997
23 days
1998
26 days
1999
17 days
2000
5 days
2001
6 days
2002
9 days
2003
5 days
2004
6 days
2005
6 days
2006
7 days
2007
5 days
2008
8 days
2009
6 days
2010
5 days
2011
8 days
2012
5 days
2013
5 days
2014
4 days
2015
4 days
2016
4 days
2017
5 days
2018
3 days
2019
3 days
2020
5 days
2021
4 days
2022
4 days
2023
4 days
2024
4 days
2025
4 days
2026
3 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
77 years with a frost
Across 77 years with a frost, the median last spring frost at Stykkisholmur falls on 16 May and the median first autumn frost on 6 October, which leaves a median of 144 days between them.
In 1996 to 2025 the median growing season was 144 days. That is 1 day more than in 1949 to 1978.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
Frost dates and growing season at Stykkisholmur
Measure
Median, all years
Earliest period (1949 to 1978)
Recent period (1996 to 2025)
Recent against earliest
Fitted trend
Last spring frost
16 May
19 May
15 May
4 days earlier
-1.4 days per decade
First autumn frost
6 October
10 October
5 October
5 days earlier
-0.3 days per decade
Growing days
144 days
143 days
144 days
1 day more
+1.1 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
49 years, 1949 to 1998
A day with at least 31.4 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 65.3 mm (2.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Stykkisholmur: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
31.4 mm (1.2 in)
5 years
40.2 mm (1.6 in)
10 years
46.1 mm (1.8 in)
25 years
53.7 mm (2.1 in)
50 years
59.5 mm (2.3 in)
Longer than the 49 years of record
100 years
65.3 mm (2.6 in)
Longer than the 49 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, 49 years of values from 1949 to 1998.
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: 61.2 mm (2.4 in) in 1958; 56.6 mm (2.2 in) in 1974; 49.3 mm (1.9 in) in 1984.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Stykkisholmur, at 1963 and 1974. Each is measured against neighbouring stations.
Relative to 4 neighbouring stations, the station's annual mean temperature from 1963 ran 0.2 C (0.4 F) lower than in the years before (likely change).
Relative to 4 neighbouring stations, the station's annual mean temperature from 1974 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Stykkisholmur, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1963
-0.2
-0.4
likely
4
1974
+0.3
+0.5
possible
4
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 Stykkisholmur standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Stykkisholmur 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.