Record envelope, standing records and threshold days for Cooper Landing 5 W (USC00502149), Alaska, United States, with 40 years of record.
Key Facts for Cooper Landing 5 W
Cooper Landing 5 W (USC00502149) is a weather station in Alaska, United States at 60.49 latitude and -149.97 longitude, 114 m (375 ft) above sea level.
The station reports from 1975 to 2014, 40 years of record.
1,464 records set at Cooper Landing 5 W still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Cooper Landing 5 W set a monthly record high maximum temperature of 11.1 C (52.0 F) on 27 February 2014.
About the Station
Location: Alaska, United States, 60.49 latitude, -149.97 longitude.
Elevation: 114 m (375 ft).
Period of record: 1975 to 2014, 40 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 Cooper Landing 5 W. 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 Cooper Landing 5 W, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-40.0 C (-40.0 F)
n/a
n/a
Feb
11.1 C (52.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Mar
11.1 C (52.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Apr
23.3 C (73.9 F)
-23.9 C (-11.0 F)
n/a
n/a
May
28.9 C (84.0 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
32.2 C (90.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
32.2 C (90.0 F)
-1.7 C (28.9 F)
n/a
n/a
Aug
31.7 C (89.1 F)
-5.0 C (23.0 F)
n/a
n/a
Sep
23.3 C (73.9 F)
-14.4 C (6.1 F)
n/a
n/a
Oct
16.7 C (62.1 F)
-23.3 C (-9.9 F)
n/a
n/a
Nov
12.8 C (55.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Dec
10.6 C (51.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Cooper Landing 5 W still stand. 1985 holds the most, with 66.
Standing records at Cooper Landing 5 W by the year they were set
Year set
Standing records
1975
39
1976
10
1977
30
1978
24
1979
35
1980
63
1981
32
1982
35
1983
22
1984
16
1985
66
1986
51
1987
28
1988
12
1989
41
1990
53
1991
24
1992
62
1993
52
1994
41
1995
51
1996
50
1997
41
1998
34
1999
56
2000
34
2001
24
2002
65
2003
51
2004
51
2005
42
2006
25
2007
42
2008
31
2009
25
2010
19
2011
10
2012
11
2013
42
2014
24
Wettest Day of Each Month
Sep: 143.5 mm (5.6 in)
The wettest day on record for each calendar month at Cooper Landing 5 W. The most was 143.5 mm (5.6 in) on 25 September 1995.
Record daily precipitation for each month at Cooper Landing 5 W
Month
Record daily precipitation (mm)
Date
Jan
100.3 mm (3.9 in)
18 January 1981
Feb
94.5 mm (3.7 in)
7 February 2003
Mar
39.1 mm (1.5 in)
12 March 1981
Apr
43.4 mm (1.7 in)
27 April 2000
May
22.9 mm (0.9 in)
25 May 2008
Jun
22.4 mm (0.9 in)
27 June 2012
Jul
47.2 mm (1.9 in)
28 July 2008
Aug
60.2 mm (2.4 in)
31 August 2006
Sep
143.5 mm (5.6 in)
25 September 1995
Oct
93.5 mm (3.7 in)
25 October 2002
Nov
97.8 mm (3.9 in)
24 November 2002
Dec
91.4 mm (3.6 in)
11 December 2006
Period of Record Coverage
1975 to 2014
Complete yearUnder 90 percent of days
40 years of record at Cooper Landing 5 W, 1975 to 2014. 14 years have data for under 90 percent of days and are left out of rankings: 1975, 1976, 1981, 1982, 1983, 1984, 1998, 2004 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 25 complete years at Cooper Landing 5 W, 1977 to 2011. Blue stripes are years cooler than the station's own mean of 2.2 C (35.9 F); red stripes are warmer. The coolest year was 1996, at 0.2 C (32.4 F), and the warmest was 2002, at 3.8 C (38.8 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Cooper Landing 5 W as warming stripes, 1977 to 2011
Year
Annual mean temperature
Difference from the station mean
1977
2.8 C
+0.64 C
1978
3.7 C
+1.56 C
1980
1.5 C
-0.70 C
1985
1.3 C
-0.84 C
1986
2.5 C
+0.36 C
1987
2.8 C
+0.59 C
1988
2.6 C
+0.41 C
1989
1.3 C
-0.89 C
1990
0.8 C
-1.33 C
1991
2.0 C
-0.12 C
1992
0.9 C
-1.31 C
1993
3.7 C
+1.57 C
1994
2.2 C
+0.05 C
1995
2.2 C
-0.01 C
1996
0.2 C
-1.92 C
1997
2.7 C
+0.57 C
1999
0.7 C
-1.48 C
2000
3.5 C
+1.30 C
2001
2.7 C
+0.58 C
2002
3.8 C
+1.64 C
2003
3.5 C
+1.34 C
2006
1.5 C
-0.68 C
2007
2.2 C
+0.07 C
2008
1.2 C
-1.01 C
2011
1.9 C
-0.31 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
1975 to 2014
Yearly extremes at Cooper Landing 5 W: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
32.2 C (90.0 F)
1993
28.3 C (82.9 F)
40
Coldest night (TNn)
-40.0 C (-40.0 F)
1989
-29.4 C (-20.9 F)
40
Wettest day (Rx1day)
143.5 mm (5.6 in)
1995
45.7 mm (1.8 in)
39
Wettest five days (Rx5day)
174.8 mm (6.9 in)
1980
54.1 mm (2.1 in)
39
Longest dry spell (CDD)
72 days
1989
28 days
39
Hottest day (TXx)
The hottest day of the year at Cooper Landing 5 W, 1975 to 2014. The record is 32.2 C (90.0 F) in 1993, marked on the chart; the median year is 28.3 C (82.9 F).
Hottest day (TXx) at Cooper Landing 5 W by year
Year
Hottest day (TXx)
1975
30.0 C (86.0 F)
1976
15.6 C (60.1 F)
1977
30.6 C (87.1 F)
1978
28.9 C (84.0 F)
1979
28.3 C (82.9 F)
1980
26.1 C (79.0 F)
1981
26.1 C (79.0 F)
1982
27.8 C (82.0 F)
1983
26.7 C (80.1 F)
1984
27.2 C (81.0 F)
1985
26.7 C (80.1 F)
1986
30.0 C (86.0 F)
1987
29.4 C (84.9 F)
1988
25.6 C (78.1 F)
1989
30.0 C (86.0 F)
1990
29.4 C (84.9 F)
1991
27.8 C (82.0 F)
1992
27.8 C (82.0 F)
1993
32.2 C (90.0 F)
1994
30.6 C (87.1 F)
1995
28.9 C (84.0 F)
1996
28.3 C (82.9 F)
1997
30.6 C (87.1 F)
1998
26.7 C (80.1 F)
1999
30.0 C (86.0 F)
2000
25.6 C (78.1 F)
2001
28.3 C (82.9 F)
2002
28.9 C (84.0 F)
2003
31.1 C (88.0 F)
2004
32.2 C (90.0 F)
2005
30.0 C (86.0 F)
2006
28.3 C (82.9 F)
2007
30.0 C (86.0 F)
2008
25.0 C (77.0 F)
2009
30.6 C (87.1 F)
2010
25.6 C (78.1 F)
2011
26.1 C (79.0 F)
2012
28.3 C (82.9 F)
2013
32.2 C (90.0 F)
2014
13.9 C (57.0 F)
Coldest night (TNn)
The coldest night of the year at Cooper Landing 5 W, 1975 to 2014. The record is -40.0 C (-40.0 F) in 1989, marked on the chart; the median year is -29.4 C (-20.9 F).
Coldest night (TNn) at Cooper Landing 5 W by year
Year
Coldest night (TNn)
1975
-31.7 C (-25.1 F)
1976
-27.8 C (-18.0 F)
1977
-29.4 C (-20.9 F)
1978
-26.1 C (-15.0 F)
1979
-32.2 C (-26.0 F)
1980
-35.0 C (-31.0 F)
1981
-26.7 C (-16.1 F)
1982
-31.7 C (-25.1 F)
1983
-27.8 C (-18.0 F)
1984
-20.6 C (-5.1 F)
1985
-28.9 C (-20.0 F)
1986
-27.8 C (-18.0 F)
1987
-26.1 C (-15.0 F)
1988
-26.7 C (-16.1 F)
1989
-40.0 C (-40.0 F)
1990
-32.2 C (-26.0 F)
1991
-30.6 C (-23.1 F)
1992
-32.8 C (-27.0 F)
1993
-31.1 C (-24.0 F)
1994
-29.4 C (-20.9 F)
1995
-31.7 C (-25.1 F)
1996
-30.6 C (-23.1 F)
1997
-33.9 C (-29.0 F)
1998
-29.4 C (-20.9 F)
1999
-36.7 C (-34.1 F)
2000
-28.9 C (-20.0 F)
2001
-31.7 C (-25.1 F)
2002
-24.4 C (-11.9 F)
2003
-27.2 C (-17.0 F)
2004
-33.3 C (-27.9 F)
2005
-26.7 C (-16.1 F)
2006
-31.1 C (-24.0 F)
2007
-31.1 C (-24.0 F)
2008
-31.1 C (-24.0 F)
2009
-27.8 C (-18.0 F)
2010
-27.8 C (-18.0 F)
2011
-28.9 C (-20.0 F)
2012
-32.2 C (-26.0 F)
2013
-28.3 C (-18.9 F)
2014
-22.8 C (-9.0 F)
Wettest day (Rx1day)
The wettest day of the year at Cooper Landing 5 W, 1975 to 2014. The record is 143.5 mm (5.6 in) in 1995, marked on the chart; the median year is 45.7 mm (1.8 in).
Wettest day (Rx1day) at Cooper Landing 5 W by year
Year
Wettest day (Rx1day)
1975
20.8 mm (0.8 in)
1976
19.3 mm (0.8 in)
1977
45.7 mm (1.8 in)
1978
33.8 mm (1.3 in)
1979
34.3 mm (1.4 in)
1980
73.4 mm (2.9 in)
1981
100.3 mm (3.9 in)
1982
33.8 mm (1.3 in)
1983
31.0 mm (1.2 in)
1984
37.6 mm (1.5 in)
1985
51.8 mm (2.0 in)
1986
83.8 mm (3.3 in)
1987
43.2 mm (1.7 in)
1988
20.6 mm (0.8 in)
1989
58.9 mm (2.3 in)
1990
57.2 mm (2.3 in)
1991
30.5 mm (1.2 in)
1992
53.3 mm (2.1 in)
1993
11.9 mm (0.5 in)
1994
25.4 mm (1.0 in)
1995
143.5 mm (5.6 in)
1996
57.2 mm (2.3 in)
1997
23.6 mm (0.9 in)
1998
36.1 mm (1.4 in)
1999
46.0 mm (1.8 in)
2000
91.4 mm (3.6 in)
2001
44.7 mm (1.8 in)
2002
100.1 mm (3.9 in)
2003
94.5 mm (3.7 in)
2004
57.2 mm (2.3 in)
2005
63.5 mm (2.5 in)
2006
91.4 mm (3.6 in)
2007
45.7 mm (1.8 in)
2008
49.5 mm (1.9 in)
2009
39.1 mm (1.5 in)
2010
49.8 mm (2.0 in)
2011
40.1 mm (1.6 in)
2012
22.9 mm (0.9 in)
2013
49.5 mm (1.9 in)
2014
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Cooper Landing 5 W, 1975 to 2014. The record is 174.8 mm (6.9 in) in 1980, marked on the chart; the median year is 54.1 mm (2.1 in).
Wettest five days (Rx5day) at Cooper Landing 5 W by year
Year
Wettest five days (Rx5day)
1975
32.4 mm (1.3 in)
1976
30.1 mm (1.2 in)
1977
63.4 mm (2.5 in)
1978
83.9 mm (3.3 in)
1979
74.0 mm (2.9 in)
1980
174.8 mm (6.9 in)
1981
119.1 mm (4.7 in)
1982
56.7 mm (2.2 in)
1983
36.3 mm (1.4 in)
1984
48.9 mm (1.9 in)
1985
54.1 mm (2.1 in)
1986
83.8 mm (3.3 in)
1987
55.9 mm (2.2 in)
1988
49.7 mm (2.0 in)
1989
76.5 mm (3.0 in)
1990
36.6 mm (1.4 in)
1991
24.9 mm (1.0 in)
1992
40.6 mm (1.6 in)
1993
16.3 mm (0.6 in)
1994
35.5 mm (1.4 in)
1995
143.5 mm (5.6 in)
1996
57.2 mm (2.3 in)
1997
37.9 mm (1.5 in)
1998
47.3 mm (1.9 in)
1999
71.4 mm (2.8 in)
2000
50.3 mm (2.0 in)
2001
44.7 mm (1.8 in)
2002
97.8 mm (3.9 in)
2003
94.5 mm (3.7 in)
2004
59.7 mm (2.4 in)
2005
63.5 mm (2.5 in)
2006
64.5 mm (2.5 in)
2007
33.8 mm (1.3 in)
2008
55.6 mm (2.2 in)
2009
39.1 mm (1.5 in)
2010
49.8 mm (2.0 in)
2011
0.0 mm (0.00 in)
2012
33.1 mm (1.3 in)
2013
73.6 mm (2.9 in)
2014
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Cooper Landing 5 W, 1975 to 2014. The record is 72 days in 1989, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Cooper Landing 5 W by year
Year
Longest dry spell (CDD)
1975
49 days
1976
19 days
1977
40 days
1978
27 days
1979
43 days
1980
33 days
1981
28 days
1982
30 days
1983
23 days
1984
28 days
1985
29 days
1986
40 days
1987
27 days
1988
29 days
1989
72 days
1990
23 days
1991
37 days
1992
31 days
1993
43 days
1994
27 days
1995
45 days
1996
65 days
1997
49 days
1998
20 days
1999
25 days
2000
22 days
2001
21 days
2002
33 days
2003
23 days
2004
18 days
2005
27 days
2006
28 days
2007
29 days
2008
27 days
2009
18 days
2010
41 days
2011
5 days
2012
4 days
2013
19 days
2014
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
25 years with a frost
Across 25 years with a frost, the median last spring frost at Cooper Landing 5 W falls on 17 June and the median first autumn frost on 24 August, which leaves a median of 69 days between them.
Fitted over all years, the growing season changes by -6.5 days per decade at this station.
Frost dates and growing season at Cooper Landing 5 W
Measure
Median, all years
Earliest period
Recent period (1977 to 2011)
Recent against earliest
Fitted trend
Last spring frost
17 June
n/a
17 June
n/a
+3.6 days per decade
First autumn frost
24 August
n/a
24 August
n/a
-2.9 days per decade
Growing days
69 days
n/a
69 days
n/a
-6.5 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.
Download the Data
Data for Cooper Landing 5 W standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cooper Landing 5 W 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.