Record envelope, standing records and threshold days for Alyeska (USC00500243), Alaska, United States, with 64 years of record.
Key Facts for Alyeska
Alyeska (USC00500243) is a weather station in Alaska, United States at 60.96 latitude and -149.11 longitude, 83 m (272 ft) above sea level.
The station reports from 1963 to 2026, 64 years of record.
1,464 records set at Alyeska still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Alyeska set a daily record precipitation of 26.4 mm (1.0 in) on 23 July 2026.
About the Station
Location: Alaska, United States, 60.96 latitude, -149.11 longitude.
Elevation: 83 m (272 ft).
Period of record: 1963 to 2026, 64 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Alyeska. 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 Alyeska, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.9 C (57.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-31.1 C (-24.0 F)
n/a
n/a
Mar
13.9 C (57.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Apr
19.4 C (66.9 F)
-18.9 C (-2.0 F)
n/a
n/a
May
25.6 C (78.1 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
29.4 C (84.9 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
31.7 C (89.1 F)
0.0 C (32.0 F)
n/a
n/a
Aug
31.1 C (88.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
22.8 C (73.0 F)
-8.3 C (17.1 F)
n/a
n/a
Oct
17.2 C (63.0 F)
-16.7 C (1.9 F)
n/a
n/a
Nov
10.6 C (51.1 F)
-26.1 C (-15.0 F)
n/a
n/a
Dec
10.0 C (50.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Alyeska still stand. 1971 holds the most, with 65.
Standing records at Alyeska by the year they were set
Year set
Standing records
1963
12
1965
17
1966
18
1967
50
1968
52
1969
9
1970
48
1971
65
1972
58
1973
13
1974
1
1976
5
1977
16
1978
6
1979
27
1980
36
1981
21
1982
37
1983
26
1984
20
1985
50
1986
23
1987
13
1988
7
1989
25
1990
36
1991
12
1992
36
1993
15
1994
29
1995
42
1996
22
1997
21
1998
12
1999
22
2000
7
2001
9
2002
47
2003
38
2004
31
2005
26
2006
13
2007
17
2008
7
2009
31
2010
12
2011
7
2012
4
2013
35
2014
41
2015
45
2016
49
2017
14
2018
20
2019
46
2020
2
2021
12
2022
14
2023
7
2024
15
2025
13
All-Time Record Progression
3 new records
3 all-time records were set at Alyeska between 24 December 2006 and 31 October 2021. Each dot is a new record.
When Alyeska set new all-time records
Date
Kind
Detail
2006-12-24
Record daily snowfall
Record daily snowfall 84.1 cm (33.1 in)
2019-07-09
Record high maximum temperature
Record high maximum temperature 31.7 C (89.1 F)
2021-10-31
Record daily precipitation
Record daily precipitation 242.1 mm (9.5 in)
Wettest Day of Each Month
Oct: 242.1 mm (9.5 in)
The wettest day on record for each calendar month at Alyeska. The most was 242.1 mm (9.5 in) on 31 October 2021.
Record daily precipitation for each month at Alyeska
Month
Record daily precipitation (mm)
Date
Jan
153.7 mm (6.1 in)
3 January 1973
Feb
134.4 mm (5.3 in)
5 February 2003
Mar
124.5 mm (4.9 in)
17 March 1995
Apr
82.6 mm (3.3 in)
27 April 1976
May
83.3 mm (3.3 in)
11 May 2018
Jun
64.0 mm (2.5 in)
17 June 2014
Jul
51.6 mm (2.0 in)
11 July 2014
Aug
77.2 mm (3.0 in)
29 August 2001
Sep
127.0 mm (5.0 in)
17 September 1967
Oct
242.1 mm (9.5 in)
31 October 2021
Nov
135.6 mm (5.3 in)
21 November 2007
Dec
134.6 mm (5.3 in)
26 December 2001
Period of Record Coverage
1963 to 2025
Complete yearUnder 90 percent of days
63 years of record at Alyeska, 1963 to 2025. 19 years have data for under 90 percent of days and are left out of rankings: 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1971 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Alyeska, 1970 to 2024. Blue stripes are years cooler than the station's own mean of 3.5 C (38.3 F); red stripes are warmer. The coolest year was 1982, at 1.5 C (34.6 F), and the warmest was 2016, at 6.0 C (42.8 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Alyeska as warming stripes, 1970 to 2024
Year
Annual mean temperature
Difference from the station mean
1970
2.8 C
-0.73 C
1982
1.5 C
-2.04 C
1983
3.0 C
-0.48 C
1984
3.2 C
-0.30 C
1985
2.3 C
-1.21 C
1986
3.7 C
+0.17 C
1987
3.7 C
+0.18 C
1988
3.5 C
-0.04 C
1990
2.0 C
-1.55 C
1991
3.0 C
-0.54 C
1992
2.2 C
-1.33 C
1993
4.3 C
+0.83 C
1994
2.7 C
-0.79 C
1995
3.2 C
-0.34 C
1996
2.0 C
-1.54 C
1997
4.3 C
+0.79 C
1998
3.5 C
+0.03 C
1999
2.1 C
-1.43 C
2000
4.1 C
+0.63 C
2001
3.7 C
+0.24 C
2002
4.7 C
+1.18 C
2005
4.7 C
+1.16 C
2006
2.7 C
-0.78 C
2007
3.4 C
-0.09 C
2008
2.3 C
-1.24 C
2010
3.6 C
+0.13 C
2011
3.0 C
-0.54 C
2013
3.8 C
+0.26 C
2014
5.3 C
+1.75 C
2015
5.0 C
+1.48 C
2016
6.0 C
+2.52 C
2017
3.4 C
-0.15 C
2018
4.7 C
+1.21 C
2019
5.9 C
+2.40 C
2020
3.2 C
-0.34 C
2021
2.7 C
-0.82 C
2022
4.3 C
+0.82 C
2023
3.7 C
+0.24 C
2024
3.8 C
+0.32 C
The annual mean temperature here has risen by 0.4 C (0.1 to 0.6) per decade over 1970 to 2024. In Fahrenheit: 0.7 F (0.3 to 1.1) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Alyeska
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.4 C (0.1 to 0.6) per decade
0.7 F (0.3 to 1.1) per decade
1970 to 2024
39
Rise
Mean daily maximum
0.4 C (0.1 to 0.6) per decade
0.6 F (0.2 to 1.1) per decade
1970 to 2024
39
Rise
Mean daily minimum
0.4 C (0.2 to 0.6) per decade
0.7 F (0.3 to 1.1) per decade
1970 to 2024
39
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
1963 to 2026
Yearly extremes at Alyeska: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
31.7 C (89.1 F)
2019
25.6 C (78.1 F)
63
Coldest night (TNn)
-34.4 C (-29.9 F)
1989
-22.8 C (-9.0 F)
63
Wettest day (Rx1day)
242.1 mm (9.5 in)
2021
76.5 mm (3.0 in)
64
Wettest five days (Rx5day)
449.8 mm (17.7 in)
2021
162.3 mm (6.4 in)
64
Longest dry spell (CDD)
32 days
1972
17 days
64
Hottest day (TXx)
The hottest day of the year at Alyeska, 1963 to 2026. The record is 31.7 C (89.1 F) in 2019, marked on the chart; the median year is 25.6 C (78.1 F).
Hottest day (TXx) at Alyeska by year
Year
Hottest day (TXx)
1963
7.8 C (46.0 F)
1964
4.4 C (39.9 F)
1965
20.0 C (68.0 F)
1966
12.8 C (55.0 F)
1967
28.9 C (84.0 F)
1968
28.9 C (84.0 F)
1969
10.6 C (51.1 F)
1970
25.0 C (77.0 F)
1971
25.6 C (78.1 F)
1972
31.1 C (88.0 F)
1973
23.9 C (75.0 F)
1974
11.1 C (52.0 F)
1975
20.6 C (69.1 F)
1976
12.2 C (54.0 F)
1977
22.2 C (72.0 F)
1978
26.1 C (79.0 F)
1979
26.7 C (80.1 F)
1980
25.0 C (77.0 F)
1981
21.7 C (71.1 F)
1982
25.6 C (78.1 F)
1983
22.2 C (72.0 F)
1984
23.3 C (73.9 F)
1985
25.0 C (77.0 F)
1986
25.6 C (78.1 F)
1987
26.7 C (80.1 F)
1988
22.8 C (73.0 F)
1989
27.8 C (82.0 F)
1990
26.7 C (80.1 F)
1991
25.6 C (78.1 F)
1992
25.0 C (77.0 F)
1993
26.7 C (80.1 F)
1994
25.6 C (78.1 F)
1995
23.3 C (73.9 F)
1996
26.1 C (79.0 F)
1997
27.8 C (82.0 F)
1998
23.9 C (75.0 F)
1999
27.2 C (81.0 F)
2000
23.9 C (75.0 F)
2001
26.1 C (79.0 F)
2002
27.2 C (81.0 F)
2003
27.8 C (82.0 F)
2004
31.1 C (88.0 F)
2005
28.3 C (82.9 F)
2006
25.6 C (78.1 F)
2007
27.2 C (81.0 F)
2008
23.3 C (73.9 F)
2009
26.7 C (80.1 F)
2010
23.9 C (75.0 F)
2011
23.9 C (75.0 F)
2012
24.4 C (75.9 F)
2013
28.3 C (82.9 F)
2014
23.9 C (75.0 F)
2015
29.4 C (84.9 F)
2016
28.9 C (84.0 F)
2017
26.7 C (80.1 F)
2018
27.8 C (82.0 F)
2019
31.7 C (89.1 F)
2020
27.8 C (82.0 F)
2021
26.7 C (80.1 F)
2022
27.2 C (81.0 F)
2023
25.0 C (77.0 F)
2024
26.1 C (79.0 F)
2025
24.4 C (75.9 F)
2026
n/a
Coldest night (TNn)
The coldest night of the year at Alyeska, 1963 to 2026. The record is -34.4 C (-29.9 F) in 1989, marked on the chart; the median year is -22.8 C (-9.0 F).
Coldest night (TNn) at Alyeska by year
Year
Coldest night (TNn)
1963
-23.3 C (-9.9 F)
1964
-20.6 C (-5.1 F)
1965
-26.7 C (-16.1 F)
1966
-26.7 C (-16.1 F)
1967
-27.8 C (-18.0 F)
1968
-28.9 C (-20.0 F)
1969
-20.0 C (-4.0 F)
1970
-24.4 C (-11.9 F)
1971
-31.1 C (-24.0 F)
1972
-28.9 C (-20.0 F)
1973
-27.8 C (-18.0 F)
1974
-26.1 C (-15.0 F)
1975
-10.6 C (12.9 F)
1976
-20.6 C (-5.1 F)
1977
-15.6 C (3.9 F)
1978
-18.3 C (-0.9 F)
1979
-23.3 C (-9.9 F)
1980
-27.8 C (-18.0 F)
1981
-20.6 C (-5.1 F)
1982
-26.1 C (-15.0 F)
1983
-25.6 C (-14.1 F)
1984
-23.3 C (-9.9 F)
1985
-20.6 C (-5.1 F)
1986
-20.6 C (-5.1 F)
1987
-20.6 C (-5.1 F)
1988
-21.1 C (-6.0 F)
1989
-34.4 C (-29.9 F)
1990
-27.2 C (-17.0 F)
1991
-23.9 C (-11.0 F)
1992
-24.4 C (-11.9 F)
1993
-27.2 C (-17.0 F)
1994
-22.8 C (-9.0 F)
1995
-22.2 C (-8.0 F)
1996
-22.2 C (-8.0 F)
1997
-25.6 C (-14.1 F)
1998
-22.2 C (-8.0 F)
1999
-31.1 C (-24.0 F)
2000
-23.3 C (-9.9 F)
2001
-22.8 C (-9.0 F)
2002
-20.0 C (-4.0 F)
2003
-20.0 C (-4.0 F)
2004
-24.4 C (-11.9 F)
2005
-20.0 C (-4.0 F)
2006
-22.2 C (-8.0 F)
2007
-23.9 C (-11.0 F)
2008
-22.2 C (-8.0 F)
2009
-25.6 C (-14.1 F)
2010
-19.4 C (-2.9 F)
2011
-22.2 C (-8.0 F)
2012
-23.3 C (-9.9 F)
2013
-22.8 C (-9.0 F)
2014
-15.0 C (5.0 F)
2015
-17.8 C (0.0 F)
2016
-18.3 C (-0.9 F)
2017
-21.7 C (-7.1 F)
2018
-17.8 C (0.0 F)
2019
-18.9 C (-2.0 F)
2020
-23.3 C (-9.9 F)
2021
-21.7 C (-7.1 F)
2022
-21.7 C (-7.1 F)
2023
-20.6 C (-5.1 F)
2024
-25.6 C (-14.1 F)
2025
-19.4 C (-2.9 F)
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Alyeska, 1963 to 2026. The record is 242.1 mm (9.5 in) in 2021, marked on the chart; the median year is 76.5 mm (3.0 in).
Wettest day (Rx1day) at Alyeska by year
Year
Wettest day (Rx1day)
1963
64.0 mm (2.5 in)
1964
16.5 mm (0.6 in)
1965
49.3 mm (1.9 in)
1966
33.8 mm (1.3 in)
1967
127.0 mm (5.0 in)
1968
50.8 mm (2.0 in)
1969
66.5 mm (2.6 in)
1970
176.5 mm (6.9 in)
1971
76.2 mm (3.0 in)
1972
101.6 mm (4.0 in)
1973
153.7 mm (6.1 in)
1974
20.1 mm (0.8 in)
1975
14.0 mm (0.6 in)
1976
82.6 mm (3.3 in)
1977
40.1 mm (1.6 in)
1978
58.7 mm (2.3 in)
1979
93.5 mm (3.7 in)
1980
76.7 mm (3.0 in)
1981
91.9 mm (3.6 in)
1982
66.3 mm (2.6 in)
1983
55.6 mm (2.2 in)
1984
70.1 mm (2.8 in)
1985
66.0 mm (2.6 in)
1986
91.9 mm (3.6 in)
1987
97.0 mm (3.8 in)
1988
80.8 mm (3.2 in)
1989
87.6 mm (3.4 in)
1990
46.5 mm (1.8 in)
1991
46.5 mm (1.8 in)
1992
67.1 mm (2.6 in)
1993
122.4 mm (4.8 in)
1994
57.2 mm (2.3 in)
1995
124.5 mm (4.9 in)
1996
83.1 mm (3.3 in)
1997
75.2 mm (3.0 in)
1998
96.5 mm (3.8 in)
1999
69.1 mm (2.7 in)
2000
68.6 mm (2.7 in)
2001
134.6 mm (5.3 in)
2002
76.2 mm (3.0 in)
2003
134.4 mm (5.3 in)
2004
59.7 mm (2.4 in)
2005
87.4 mm (3.4 in)
2006
97.8 mm (3.9 in)
2007
135.6 mm (5.3 in)
2008
114.8 mm (4.5 in)
2009
87.6 mm (3.4 in)
2010
81.8 mm (3.2 in)
2011
115.8 mm (4.6 in)
2012
99.1 mm (3.9 in)
2013
48.8 mm (1.9 in)
2014
100.1 mm (3.9 in)
2015
80.5 mm (3.2 in)
2016
71.1 mm (2.8 in)
2017
74.4 mm (2.9 in)
2018
84.3 mm (3.3 in)
2019
99.8 mm (3.9 in)
2020
71.1 mm (2.8 in)
2021
242.1 mm (9.5 in)
2022
52.6 mm (2.1 in)
2023
66.0 mm (2.6 in)
2024
58.2 mm (2.3 in)
2025
92.7 mm (3.6 in)
2026
69.3 mm (2.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Alyeska, 1963 to 2026. The record is 449.8 mm (17.7 in) in 2021, marked on the chart; the median year is 162.3 mm (6.4 in).
Wettest five days (Rx5day) at Alyeska by year
Year
Wettest five days (Rx5day)
1963
94.0 mm (3.7 in)
1964
26.1 mm (1.0 in)
1965
77.8 mm (3.1 in)
1966
72.9 mm (2.9 in)
1967
238.7 mm (9.4 in)
1968
94.0 mm (3.7 in)
1969
173.6 mm (6.8 in)
1970
282.4 mm (11.1 in)
1971
165.4 mm (6.5 in)
1972
102.9 mm (4.1 in)
1973
256.6 mm (10.1 in)
1974
20.1 mm (0.8 in)
1975
32.3 mm (1.3 in)
1976
135.7 mm (5.3 in)
1977
115.3 mm (4.5 in)
1978
179.3 mm (7.1 in)
1979
163.7 mm (6.4 in)
1980
255.0 mm (10.0 in)
1981
262.8 mm (10.3 in)
1982
103.8 mm (4.1 in)
1983
142.7 mm (5.6 in)
1984
172.5 mm (6.8 in)
1985
221.0 mm (8.7 in)
1986
175.3 mm (6.9 in)
1987
170.8 mm (6.7 in)
1988
195.4 mm (7.7 in)
1989
190.2 mm (7.5 in)
1990
81.6 mm (3.2 in)
1991
112.0 mm (4.4 in)
1992
146.1 mm (5.8 in)
1993
135.9 mm (5.4 in)
1994
153.9 mm (6.1 in)
1995
247.9 mm (9.8 in)
1996
144.8 mm (5.7 in)
1997
159.7 mm (6.3 in)
1998
149.7 mm (5.9 in)
1999
148.6 mm (5.9 in)
2000
157.5 mm (6.2 in)
2001
267.5 mm (10.5 in)
2002
210.7 mm (8.3 in)
2003
227.3 mm (8.9 in)
2004
119.2 mm (4.7 in)
2005
160.8 mm (6.3 in)
2006
193.7 mm (7.6 in)
2007
288.8 mm (11.4 in)
2008
200.4 mm (7.9 in)
2009
206.3 mm (8.1 in)
2010
208.1 mm (8.2 in)
2011
226.2 mm (8.9 in)
2012
205.7 mm (8.1 in)
2013
146.1 mm (5.8 in)
2014
150.1 mm (5.9 in)
2015
190.7 mm (7.5 in)
2016
213.6 mm (8.4 in)
2017
152.2 mm (6.0 in)
2018
140.9 mm (5.5 in)
2019
182.6 mm (7.2 in)
2020
187.8 mm (7.4 in)
2021
449.8 mm (17.7 in)
2022
113.0 mm (4.4 in)
2023
118.6 mm (4.7 in)
2024
116.4 mm (4.6 in)
2025
196.1 mm (7.7 in)
2026
96.7 mm (3.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Alyeska, 1963 to 2026. The record is 32 days in 1972, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Alyeska by year
Year
Longest dry spell (CDD)
1963
15 days
1964
8 days
1965
11 days
1966
13 days
1967
17 days
1968
11 days
1969
16 days
1970
14 days
1971
25 days
1972
32 days
1973
13 days
1974
17 days
1975
10 days
1976
15 days
1977
14 days
1978
24 days
1979
28 days
1980
15 days
1981
15 days
1982
20 days
1983
17 days
1984
18 days
1985
13 days
1986
20 days
1987
20 days
1988
16 days
1989
19 days
1990
13 days
1991
10 days
1992
22 days
1993
27 days
1994
19 days
1995
22 days
1996
22 days
1997
15 days
1998
12 days
1999
18 days
2000
14 days
2001
14 days
2002
22 days
2003
18 days
2004
21 days
2005
13 days
2006
16 days
2007
17 days
2008
15 days
2009
19 days
2010
18 days
2011
25 days
2012
20 days
2013
25 days
2014
23 days
2015
16 days
2016
21 days
2017
21 days
2018
15 days
2019
32 days
2020
11 days
2021
23 days
2022
29 days
2023
16 days
2024
25 days
2025
21 days
2026
17 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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Alyeska falls on 13 May and the median first autumn frost on 26 September, which leaves a median of 140 days between them.
Fitted over all years, the growing season changes by +7.9 days per decade at this station.
Frost dates and growing season at Alyeska
Measure
Median, all years
Earliest period
Recent period (1991 to 2024)
Recent against earliest
Fitted trend
Last spring frost
13 May
n/a
9 May
n/a
-3.4 days per decade
First autumn frost
26 September
n/a
30 September
n/a
+4.6 days per decade
Growing days
140 days
n/a
144 days
n/a
+7.9 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
47 years, 1970 to 2025
A day with at least 80.9 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 219.3 mm (8.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Alyeska: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
80.9 mm (3.2 in)
5 years
109.1 mm (4.3 in)
10 years
130.9 mm (5.2 in)
25 years
162.5 mm (6.4 in)
50 years
189.4 mm (7.5 in)
Longer than the 47 years of record
100 years
219.3 mm (8.6 in)
Longer than the 47 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, 47 years of values from 1970 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: 242.1 mm (9.5 in) in 2021; 176.5 mm (6.9 in) in 1970; 135.6 mm (5.3 in) in 2007.
Download the Data
Data for Alyeska standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alyeska 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.