Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Sondrestrom. 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 Sondrestrom, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.3 C (54.1 F)
-47.2 C (-53.0 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-46.8 C (-52.2 F)
n/a
n/a
Mar
14.4 C (57.9 F)
-45.4 C (-49.7 F)
n/a
n/a
Apr
17.8 C (64.0 F)
-34.4 C (-29.9 F)
n/a
n/a
May
22.2 C (72.0 F)
-21.8 C (-7.2 F)
n/a
n/a
Jun
25.2 C (77.4 F)
-4.7 C (23.5 F)
n/a
n/a
Jul
25.5 C (77.9 F)
-0.7 C (30.7 F)
n/a
n/a
Aug
22.9 C (73.2 F)
-4.6 C (23.7 F)
n/a
n/a
Sep
21.1 C (70.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Oct
17.1 C (62.8 F)
-29.7 C (-21.5 F)
n/a
n/a
Nov
15.8 C (60.4 F)
-36.3 C (-33.3 F)
n/a
n/a
Dec
11.9 C (53.4 F)
-42.8 C (-45.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Sondrestrom still stand. 1983 holds the most, with 56.
Standing records at Sondrestrom by the year they were set
Year set
Standing records
1949
52
1950
16
1951
10
1952
15
1953
23
1954
15
1955
29
1956
17
1957
11
1958
10
1959
17
1960
33
1961
16
1962
19
1963
14
1964
43
1965
19
1966
14
1967
22
1968
28
1969
24
1970
28
1975
4
1976
31
1977
19
1978
32
1979
23
1980
14
1981
9
1982
14
1983
56
1984
33
1985
17
1986
22
1987
13
1988
17
1989
24
1990
15
1991
14
1992
43
1993
41
1994
11
1995
37
1996
35
1997
17
1998
10
1999
31
2000
12
2001
12
2002
10
2003
21
2004
10
2005
27
2006
18
2007
9
2008
20
2009
28
2010
49
2011
19
2012
35
2014
15
2015
10
2016
36
2017
17
2018
11
2019
25
2020
23
All-Time Record Progression
2 new records
2 all-time records were set at Sondrestrom between 6 September 1986 and 26 July 1990. Each dot is a new record.
When Sondrestrom set new all-time records
Date
Kind
Detail
1986-09-06
Record daily precipitation
Record daily precipitation 46.0 mm (1.8 in)
1990-07-26
Record high maximum temperature
Record high maximum temperature 25.5 C (77.9 F)
Wettest Day of Each Month
Sep: 46.0 mm (1.8 in)
The wettest day on record for each calendar month at Sondrestrom. The most was 46.0 mm (1.8 in) on 6 September 1986.
Record daily precipitation for each month at Sondrestrom
Month
Record daily precipitation (mm)
Date
Jan
17.8 mm (0.7 in)
7 January 1953
Feb
16.5 mm (0.6 in)
23 February 1968
Mar
14.0 mm (0.6 in)
1 March 1968
Apr
33.3 mm (1.3 in)
29 April 1957
May
28.0 mm (1.1 in)
13 May 2006
Jun
24.0 mm (0.9 in)
27 June 1985
Jul
34.0 mm (1.3 in)
26 July 2007
Aug
36.0 mm (1.4 in)
14 August 2008
Sep
46.0 mm (1.8 in)
6 September 1986
Oct
31.2 mm (1.2 in)
1 October 2003
Nov
22.0 mm (0.9 in)
5 November 1985
Dec
20.3 mm (0.8 in)
21 December 1966
Period of Record Coverage
1947 to 2021
Complete yearUnder 90 percent of days
70 years of record at Sondrestrom, 1947 to 2021. 7 years have data for under 90 percent of days and are left out of rankings: 1947, 1950, 1951, 1975, 1982, 2013, 2021.
Cooler than the station meanWarmer than the station mean
One stripe for each of 63 complete years at Sondrestrom, 1949 to 2020. Blue stripes are years cooler than the station's own mean of -4.6 C (23.7 F); red stripes are warmer. The coolest year was 1984, at -8.8 C (16.2 F), and the warmest was 2010, at 0.3 C (32.5 F). The strongest colour marks a difference of 5.0 C (9.0 F).
Annual mean temperature at Sondrestrom as warming stripes, 1949 to 2020
Year
Annual mean temperature
Difference from the station mean
1949
-7.6 C
-3.03 C
1952
-4.0 C
+0.65 C
1953
-5.6 C
-0.96 C
1954
-4.8 C
-0.19 C
1955
-4.5 C
+0.10 C
1956
-5.8 C
-1.19 C
1957
-5.2 C
-0.60 C
1958
-4.8 C
-0.16 C
1959
-5.9 C
-1.30 C
1960
-5.0 C
-0.35 C
1961
-6.7 C
-2.05 C
1962
-3.3 C
+1.34 C
1963
-3.0 C
+1.60 C
1964
-4.5 C
+0.12 C
1965
-4.0 C
+0.64 C
1966
-5.6 C
-1.00 C
1967
-6.4 C
-1.76 C
1968
-4.1 C
+0.50 C
1969
-4.0 C
+0.58 C
1970
-5.0 C
-0.42 C
1976
-4.6 C
+0.01 C
1977
-2.4 C
+2.21 C
1978
-5.8 C
-1.19 C
1979
-4.0 C
+0.60 C
1980
-3.1 C
+1.52 C
1981
-5.5 C
-0.86 C
1983
-8.3 C
-3.73 C
1984
-8.8 C
-4.15 C
1985
-2.6 C
+1.99 C
1986
-4.3 C
+0.30 C
1987
-5.0 C
-0.42 C
1988
-3.7 C
+0.90 C
1989
-7.2 C
-2.56 C
1990
-5.6 C
-0.94 C
1991
-4.8 C
-0.15 C
1992
-7.2 C
-2.61 C
1993
-7.4 C
-2.80 C
1994
-6.1 C
-1.50 C
1995
-5.4 C
-0.82 C
1996
-2.7 C
+1.96 C
1997
-3.5 C
+1.07 C
1998
-3.0 C
+1.63 C
1999
-4.7 C
-0.07 C
2000
-3.0 C
+1.65 C
2001
-3.9 C
+0.75 C
2002
-5.0 C
-0.42 C
2003
-2.3 C
+2.31 C
2004
-4.5 C
+0.12 C
2005
-2.1 C
+2.48 C
2006
-4.0 C
+0.60 C
2007
-3.8 C
+0.85 C
2008
-4.2 C
+0.40 C
2009
-4.3 C
+0.32 C
2010
0.3 C
+4.90 C
2011
-5.3 C
-0.65 C
2012
-3.7 C
+0.96 C
2014
-4.0 C
+0.59 C
2015
-7.3 C
-2.64 C
2016
-2.3 C
+2.36 C
2017
-4.0 C
+0.61 C
2018
-5.4 C
-0.76 C
2019
-2.8 C
+1.78 C
2020
-4.0 C
+0.61 C
The annual mean temperature here has risen by 0.22 C (0.03 to 0.41) per decade over 1949 to 2020. In Fahrenheit: 0.39 F (0.05 to 0.74) per decade. The slope is a straight line fitted to 63 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Sondrestrom
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.22 C (0.03 to 0.41) per decade
0.39 F (0.05 to 0.74) per decade
1949 to 2020
63
Rise
Mean daily maximum
0.3 C (0.1 to 0.5) per decade
0.6 F (0.2 to 0.9) per decade
1949 to 2020
63
Rise
Mean daily minimum
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.1 to 0.6) per decade
1949 to 2020
63
Not clearly different from zero
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
1947 to 2021
Yearly extremes at Sondrestrom: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
25.5 C (77.9 F)
1990
21.7 C (71.1 F)
70
Coldest night (TNn)
-47.2 C (-53.0 F)
1983
-39.8 C (-39.7 F)
70
Wettest day (Rx1day)
46.0 mm (1.8 in)
1986
17.0 mm (0.7 in)
64
Wettest five days (Rx5day)
58.9 mm (2.3 in)
1986
30.6 mm (1.2 in)
62
Longest dry spell (CDD)
113 days
1989
39 days
64
Hottest day (TXx)
The hottest day of the year at Sondrestrom, 1947 to 2021. The record is 25.5 C (77.9 F) in 1990, marked on the chart; the median year is 21.7 C (71.1 F).
Hottest day (TXx) at Sondrestrom by year
Year
Hottest day (TXx)
1947
3.3 C (37.9 F)
1949
21.7 C (71.1 F)
1950
22.8 C (73.0 F)
1951
20.0 C (68.0 F)
1952
21.1 C (70.0 F)
1953
21.7 C (71.1 F)
1954
21.7 C (71.1 F)
1955
20.6 C (69.1 F)
1956
22.2 C (72.0 F)
1957
21.7 C (71.1 F)
1958
21.1 C (70.0 F)
1959
23.9 C (75.0 F)
1960
22.8 C (73.0 F)
1961
21.1 C (70.0 F)
1962
23.9 C (75.0 F)
1963
21.7 C (71.1 F)
1964
22.8 C (73.0 F)
1965
21.7 C (71.1 F)
1966
20.6 C (69.1 F)
1967
18.9 C (66.0 F)
1968
22.2 C (72.0 F)
1969
22.2 C (72.0 F)
1970
20.0 C (68.0 F)
1975
4.6 C (40.3 F)
1976
24.2 C (75.6 F)
1977
20.4 C (68.7 F)
1978
21.7 C (71.1 F)
1979
21.4 C (70.5 F)
1980
21.3 C (70.3 F)
1981
20.1 C (68.2 F)
1982
19.6 C (67.3 F)
1983
19.8 C (67.6 F)
1984
21.7 C (71.1 F)
1985
21.8 C (71.2 F)
1986
21.8 C (71.2 F)
1987
21.8 C (71.2 F)
1988
23.1 C (73.6 F)
1989
20.7 C (69.3 F)
1990
25.5 C (77.9 F)
1991
22.4 C (72.3 F)
1992
20.6 C (69.1 F)
1993
22.5 C (72.5 F)
1994
22.1 C (71.8 F)
1995
22.9 C (73.2 F)
1996
20.2 C (68.4 F)
1997
22.4 C (72.3 F)
1998
22.4 C (72.3 F)
1999
21.4 C (70.5 F)
2000
21.2 C (70.2 F)
2001
20.5 C (68.9 F)
2002
23.1 C (73.6 F)
2003
22.9 C (73.2 F)
2004
20.9 C (69.6 F)
2005
21.4 C (70.5 F)
2006
21.6 C (70.9 F)
2007
21.9 C (71.4 F)
2008
25.2 C (77.4 F)
2009
23.1 C (73.6 F)
2010
22.2 C (72.0 F)
2011
22.3 C (72.1 F)
2012
24.2 C (75.6 F)
2013
-5.3 C (22.5 F)
2014
23.3 C (73.9 F)
2015
22.6 C (72.7 F)
2016
23.0 C (73.4 F)
2017
22.7 C (72.9 F)
2018
21.8 C (71.2 F)
2019
22.7 C (72.9 F)
2020
21.6 C (70.9 F)
2021
3.0 C (37.4 F)
Coldest night (TNn)
The coldest night of the year at Sondrestrom, 1947 to 2021. The record is -47.2 C (-53.0 F) in 1983, marked on the chart; the median year is -39.8 C (-39.7 F).
Coldest night (TNn) at Sondrestrom by year
Year
Coldest night (TNn)
1947
-22.2 C (-8.0 F)
1949
-45.0 C (-49.0 F)
1950
-41.7 C (-43.1 F)
1951
-34.4 C (-29.9 F)
1952
-41.7 C (-43.1 F)
1953
-41.1 C (-42.0 F)
1954
-40.0 C (-40.0 F)
1955
-40.0 C (-40.0 F)
1956
-37.2 C (-35.0 F)
1957
-40.0 C (-40.0 F)
1958
-37.2 C (-35.0 F)
1959
-40.0 C (-40.0 F)
1960
-41.7 C (-43.1 F)
1961
-42.2 C (-44.0 F)
1962
-34.4 C (-29.9 F)
1963
-30.6 C (-23.1 F)
1964
-37.2 C (-35.0 F)
1965
-42.8 C (-45.0 F)
1966
-41.7 C (-43.1 F)
1967
-36.7 C (-34.1 F)
1968
-40.6 C (-41.1 F)
1969
-33.9 C (-29.0 F)
1970
-37.2 C (-35.0 F)
1975
-42.4 C (-44.3 F)
1976
-42.2 C (-44.0 F)
1977
-37.2 C (-35.0 F)
1978
-42.5 C (-44.5 F)
1979
-38.8 C (-37.8 F)
1980
-35.9 C (-32.6 F)
1981
-40.4 C (-40.7 F)
1982
-42.8 C (-45.0 F)
1983
-47.2 C (-53.0 F)
1984
-46.4 C (-51.5 F)
1985
-33.7 C (-28.7 F)
1986
-34.7 C (-30.5 F)
1987
-40.4 C (-40.7 F)
1988
-37.1 C (-34.8 F)
1989
-43.3 C (-45.9 F)
1990
-38.9 C (-38.0 F)
1991
-39.8 C (-39.6 F)
1992
-43.9 C (-47.0 F)
1993
-45.4 C (-49.7 F)
1994
-39.6 C (-39.3 F)
1995
-44.9 C (-48.8 F)
1996
-34.7 C (-30.5 F)
1997
-42.9 C (-45.2 F)
1998
-37.6 C (-35.7 F)
1999
-41.3 C (-42.3 F)
2000
-37.8 C (-36.0 F)
2001
-39.6 C (-39.3 F)
2002
-42.5 C (-44.5 F)
2003
-34.6 C (-30.3 F)
2004
-39.2 C (-38.6 F)
2005
-35.9 C (-32.6 F)
2006
-40.4 C (-40.7 F)
2007
-40.8 C (-41.4 F)
2008
-46.8 C (-52.2 F)
2009
-36.2 C (-33.2 F)
2010
-30.9 C (-23.6 F)
2011
-34.2 C (-29.6 F)
2012
-44.1 C (-47.4 F)
2013
-22.9 C (-9.2 F)
2014
-35.9 C (-32.6 F)
2015
-39.9 C (-39.8 F)
2016
-39.3 C (-38.7 F)
2017
-41.1 C (-42.0 F)
2018
-39.6 C (-39.3 F)
2019
-36.6 C (-33.9 F)
2020
-41.5 C (-42.7 F)
2021
-14.6 C (5.7 F)
Wettest day (Rx1day)
The wettest day of the year at Sondrestrom, 1947 to 2021. The record is 46.0 mm (1.8 in) in 1986, marked on the chart; the median year is 17.0 mm (0.7 in).
Wettest day (Rx1day) at Sondrestrom by year
Year
Wettest day (Rx1day)
1947
0.0 mm (0.00 in)
1949
14.0 mm (0.6 in)
1950
15.5 mm (0.6 in)
1951
7.9 mm (0.31 in)
1952
16.0 mm (0.6 in)
1953
17.8 mm (0.7 in)
1954
16.0 mm (0.6 in)
1955
11.7 mm (0.5 in)
1956
12.7 mm (0.5 in)
1957
33.3 mm (1.3 in)
1958
13.0 mm (0.5 in)
1959
16.0 mm (0.6 in)
1960
14.0 mm (0.6 in)
1961
18.8 mm (0.7 in)
1962
11.2 mm (0.4 in)
1963
16.3 mm (0.6 in)
1964
19.6 mm (0.8 in)
1965
13.0 mm (0.5 in)
1966
20.3 mm (0.8 in)
1967
16.3 mm (0.6 in)
1968
16.5 mm (0.6 in)
1969
16.0 mm (0.6 in)
1970
10.9 mm (0.4 in)
1975
n/a
1976
4.6 mm (0.18 in)
1977
14.0 mm (0.6 in)
1978
20.0 mm (0.8 in)
1979
19.4 mm (0.8 in)
1980
10.4 mm (0.4 in)
1981
33.2 mm (1.3 in)
1982
15.8 mm (0.6 in)
1983
24.4 mm (1.0 in)
1984
17.0 mm (0.7 in)
1985
24.0 mm (0.9 in)
1986
46.0 mm (1.8 in)
1987
19.0 mm (0.7 in)
1988
20.5 mm (0.8 in)
1989
24.0 mm (0.9 in)
1990
22.0 mm (0.9 in)
1991
27.0 mm (1.1 in)
1992
14.0 mm (0.6 in)
1993
22.0 mm (0.9 in)
1994
27.0 mm (1.1 in)
1995
16.0 mm (0.6 in)
1996
22.6 mm (0.9 in)
1997
33.0 mm (1.3 in)
1998
18.1 mm (0.7 in)
1999
13.2 mm (0.5 in)
2000
39.0 mm (1.5 in)
2001
22.0 mm (0.9 in)
2002
16.8 mm (0.7 in)
2003
31.2 mm (1.2 in)
2004
15.0 mm (0.6 in)
2005
24.2 mm (1.0 in)
2006
28.0 mm (1.1 in)
2007
34.0 mm (1.3 in)
2008
36.0 mm (1.4 in)
2009
18.0 mm (0.7 in)
2010
33.0 mm (1.3 in)
2011
13.0 mm (0.5 in)
2012
17.0 mm (0.7 in)
2013
0.0 mm (0.00 in)
2014
21.3 mm (0.8 in)
2015
13.0 mm (0.5 in)
2016
1.1 mm (0.04 in)
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Sondrestrom, 1947 to 2021. The record is 58.9 mm (2.3 in) in 1986, marked on the chart; the median year is 30.6 mm (1.2 in).
Wettest five days (Rx5day) at Sondrestrom by year
Year
Wettest five days (Rx5day)
1947
n/a
1949
26.4 mm (1.0 in)
1950
15.5 mm (0.6 in)
1951
17.8 mm (0.7 in)
1952
18.3 mm (0.7 in)
1953
19.9 mm (0.8 in)
1954
24.2 mm (1.0 in)
1955
16.8 mm (0.7 in)
1956
20.8 mm (0.8 in)
1957
38.5 mm (1.5 in)
1958
20.4 mm (0.8 in)
1959
23.1 mm (0.9 in)
1960
25.4 mm (1.0 in)
1961
36.4 mm (1.4 in)
1962
12.9 mm (0.5 in)
1963
23.7 mm (0.9 in)
1964
38.9 mm (1.5 in)
1965
22.9 mm (0.9 in)
1966
30.7 mm (1.2 in)
1967
21.9 mm (0.9 in)
1968
23.9 mm (0.9 in)
1969
22.2 mm (0.9 in)
1970
21.0 mm (0.8 in)
1975
n/a
1976
4.6 mm (0.18 in)
1977
33.0 mm (1.3 in)
1978
42.7 mm (1.7 in)
1979
37.2 mm (1.5 in)
1980
22.5 mm (0.9 in)
1981
43.2 mm (1.7 in)
1982
41.9 mm (1.6 in)
1983
51.3 mm (2.0 in)
1984
32.4 mm (1.3 in)
1985
31.9 mm (1.3 in)
1986
58.9 mm (2.3 in)
1987
20.6 mm (0.8 in)
1988
31.1 mm (1.2 in)
1989
33.6 mm (1.3 in)
1990
34.4 mm (1.4 in)
1991
49.4 mm (1.9 in)
1992
29.4 mm (1.2 in)
1993
35.5 mm (1.4 in)
1994
34.5 mm (1.4 in)
1995
44.7 mm (1.8 in)
1996
48.6 mm (1.9 in)
1997
51.5 mm (2.0 in)
1998
53.0 mm (2.1 in)
1999
19.6 mm (0.8 in)
2000
46.9 mm (1.8 in)
2001
26.5 mm (1.0 in)
2002
29.8 mm (1.2 in)
2003
53.3 mm (2.1 in)
2004
26.1 mm (1.0 in)
2005
38.5 mm (1.5 in)
2006
34.5 mm (1.4 in)
2007
47.5 mm (1.9 in)
2008
48.8 mm (1.9 in)
2009
24.7 mm (1.0 in)
2010
44.5 mm (1.8 in)
2011
30.5 mm (1.2 in)
2012
28.0 mm (1.1 in)
2013
n/a
2014
29.6 mm (1.2 in)
2015
39.9 mm (1.6 in)
2016
1.4 mm (0.06 in)
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Sondrestrom, 1947 to 2021. The record is 113 days in 1989, marked on the chart; the median year is 39 days.
Longest dry spell (CDD) at Sondrestrom by year
Year
Longest dry spell (CDD)
1947
3 days
1949
75 days
1950
26 days
1951
34 days
1952
57 days
1953
37 days
1954
30 days
1955
75 days
1956
68 days
1957
63 days
1958
48 days
1959
36 days
1960
30 days
1961
38 days
1962
32 days
1963
43 days
1964
35 days
1965
40 days
1966
47 days
1967
30 days
1968
58 days
1969
34 days
1970
34 days
1975
n/a
1976
27 days
1977
40 days
1978
24 days
1979
43 days
1980
57 days
1981
47 days
1982
40 days
1983
35 days
1984
57 days
1985
58 days
1986
30 days
1987
62 days
1988
41 days
1989
113 days
1990
61 days
1991
36 days
1992
32 days
1993
39 days
1994
78 days
1995
99 days
1996
27 days
1997
64 days
1998
30 days
1999
29 days
2000
64 days
2001
25 days
2002
45 days
2003
52 days
2004
30 days
2005
34 days
2006
69 days
2007
40 days
2008
27 days
2009
76 days
2010
34 days
2011
48 days
2012
28 days
2013
1 day
2014
12 days
2015
18 days
2016
9 days
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
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
63 years with a frost
Across 63 years with a frost, the median last spring frost at Sondrestrom falls on 31 May and the median first autumn frost on 25 August, which leaves a median of 84 days between them.
In 1990 to 2020 the median growing season was 88 days. That is 4 days more than in 1949 to 1986.
Fitted over all years, the growing season changes by -0.4 days per decade at this station.
Frost dates and growing season at Sondrestrom
Measure
Median, all years
Earliest period (1949 to 1986)
Recent period (1990 to 2020)
Recent against earliest
Fitted trend
Last spring frost
31 May
4 June
30 May
5 days earlier
-0.4 days per decade
First autumn frost
25 August
25 August
26 August
1 day later
-0.7 days per decade
Growing days
84 days
84 days
88 days
4 days more
-0.4 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
56 years, 1949 to 2012
A day with at least 18.6 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 51.3 mm (2.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Sondrestrom: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
18.6 mm (0.7 in)
5 years
25.5 mm (1.0 in)
10 years
30.8 mm (1.2 in)
25 years
38.2 mm (1.5 in)
50 years
44.5 mm (1.8 in)
100 years
51.3 mm (2.0 in)
Longer than the 56 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, 56 years of values from 1949 to 2012.
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: 46.0 mm (1.8 in) in 1986; 39.0 mm (1.5 in) in 2000; 36.0 mm (1.4 in) in 2008.
Download the Data
Data for Sondrestrom standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sondrestrom 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.