Record envelope, standing records and threshold days for Glen Alps (USC00503299), Alaska, United States, with 46 years of record.
Key Facts for Glen Alps
Glen Alps (USC00503299) is a weather station in Alaska, United States at 61.10 latitude and -149.69 longitude, 671 m (2,202 ft) above sea level.
The station reports from 1971 to 2016, 46 years of record.
1,464 records set at Glen Alps still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Glen Alps tied a daily record high maximum temperature of 17.2 C (63.0 F) on 6 September 2016.
About the Station
Location: Alaska, United States, 61.10 latitude, -149.69 longitude.
Elevation: 671 m (2,202 ft).
Period of record: 1971 to 2016, 46 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 Glen Alps. 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 Glen Alps, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.2 C (54.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Mar
12.8 C (55.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Apr
17.2 C (63.0 F)
-21.7 C (-7.1 F)
n/a
n/a
May
21.7 C (71.1 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
25.6 C (78.1 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
24.4 C (75.9 F)
-2.2 C (28.0 F)
n/a
n/a
Aug
25.6 C (78.1 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
21.1 C (70.0 F)
-12.8 C (9.0 F)
n/a
n/a
Oct
13.3 C (55.9 F)
-23.3 C (-9.9 F)
n/a
n/a
Nov
10.6 C (51.1 F)
-28.3 C (-18.9 F)
n/a
n/a
Dec
9.4 C (48.9 F)
-30.6 C (-23.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Glen Alps still stand. 1980 holds the most, with 64.
Standing records at Glen Alps by the year they were set
Year set
Standing records
1971
16
1972
9
1975
25
1976
26
1977
10
1978
19
1979
25
1980
64
1981
24
1982
47
1983
32
1984
40
1985
52
1986
59
1987
23
1988
9
1989
51
1990
60
1991
24
1992
55
1993
37
1994
33
1995
52
1996
32
1997
25
1998
23
1999
56
2000
20
2001
21
2002
57
2003
51
2004
46
2005
22
2006
24
2007
23
2008
21
2009
39
2010
25
2011
11
2012
14
2013
56
2014
39
2015
33
2016
34
All-Time Record Progression
1 new records
1 all-time records were set at Glen Alps between 15 March 2014 and 15 March 2014. Each dot is a new record.
When Glen Alps set new all-time records
Date
Kind
Detail
2014-03-15
Record daily snowfall
Record daily snowfall 68.6 cm (27.0 in)
Wettest Day of Each Month
Oct: 88.9 mm (3.5 in)
The wettest day on record for each calendar month at Glen Alps. The most was 88.9 mm (3.5 in) on 11 October 1975.
Record daily precipitation for each month at Glen Alps
Month
Record daily precipitation (mm)
Date
Jan
42.9 mm (1.7 in)
13 January 2013
Feb
36.3 mm (1.4 in)
5 February 2003
Mar
25.9 mm (1.0 in)
15 March 2014
Apr
49.5 mm (1.9 in)
27 April 1976
May
17.5 mm (0.7 in)
31 May 2014
Jun
41.4 mm (1.6 in)
18 June 1980
Jul
74.2 mm (2.9 in)
31 July 2016
Aug
87.6 mm (3.4 in)
26 August 1989
Sep
66.0 mm (2.6 in)
21 September 1976
Oct
88.9 mm (3.5 in)
11 October 1975
Nov
39.4 mm (1.6 in)
11 November 1979
Dec
58.4 mm (2.3 in)
4 December 2011
Period of Record Coverage
1971 to 2016
Complete yearUnder 90 percent of days
44 years of record at Glen Alps, 1971 to 2016. 8 years have data for under 90 percent of days and are left out of rankings: 1971, 1972, 1975, 1976, 1977, 2004, 2012, 2016.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Glen Alps, 1978 to 2015. Blue stripes are years cooler than the station's own mean of 1.0 C (33.8 F); red stripes are warmer. The coolest year was 1999, at -0.9 C (30.4 F), and the warmest was 2014, at 2.9 C (37.2 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Glen Alps as warming stripes, 1978 to 2015
Year
Annual mean temperature
Difference from the station mean
1978
1.9 C
+0.89 C
1979
1.2 C
+0.12 C
1980
0.4 C
-0.63 C
1981
1.6 C
+0.55 C
1982
-0.7 C
-1.74 C
1983
1.3 C
+0.26 C
1984
1.3 C
+0.24 C
1985
0.3 C
-0.71 C
1986
1.7 C
+0.64 C
1987
1.5 C
+0.49 C
1988
1.5 C
+0.44 C
1989
0.8 C
-0.19 C
1990
0.3 C
-0.74 C
1991
1.3 C
+0.31 C
1992
-0.3 C
-1.38 C
1993
2.0 C
+0.95 C
1994
0.2 C
-0.87 C
1995
0.8 C
-0.19 C
1996
-0.5 C
-1.50 C
1997
1.2 C
+0.20 C
1998
1.0 C
-0.05 C
1999
-0.9 C
-1.93 C
2000
1.6 C
+0.53 C
2001
1.4 C
+0.35 C
2002
2.3 C
+1.29 C
2003
2.3 C
+1.31 C
2006
0.3 C
-0.74 C
2007
0.7 C
-0.31 C
2008
-0.4 C
-1.46 C
2009
1.2 C
+0.21 C
2010
1.8 C
+0.72 C
2011
0.3 C
-0.73 C
2013
1.3 C
+0.30 C
2014
2.9 C
+1.85 C
2015
2.5 C
+1.44 C
The fitted trend in annual mean temperature here over 1978 to 2015 is 0.1 C (-0.2 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.3 to 0.8) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Glen Alps
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.4) per decade
0.3 F (-0.3 to 0.8) per decade
1978 to 2015
35
Not clearly different from zero
Mean daily maximum
-0.03 C (-0.30 to 0.24) per decade
-0.1 F (-0.5 to 0.4) per decade
1978 to 2015
35
Not clearly different from zero
Mean daily minimum
0.31 C (-0.02 to 0.65) per decade
0.56 F (-0.04 to 1.16) per decade
1978 to 2015
35
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
1971 to 2016
Yearly extremes at Glen Alps: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
25.6 C (78.1 F)
2004
22.2 C (72.0 F)
44
Coldest night (TNn)
-38.3 C (-36.9 F)
1989
-25.0 C (-13.0 F)
44
Wettest day (Rx1day)
88.9 mm (3.5 in)
1975
35.4 mm (1.4 in)
44
Wettest five days (Rx5day)
153.5 mm (6.0 in)
1989
60.1 mm (2.4 in)
44
Longest dry spell (CDD)
47 days
1996
22 days
44
Hottest day (TXx)
The hottest day of the year at Glen Alps, 1971 to 2016. The record is 25.6 C (78.1 F) in 2004, marked on the chart; the median year is 22.2 C (72.0 F).
Hottest day (TXx) at Glen Alps by year
Year
Hottest day (TXx)
1971
23.9 C (75.0 F)
1972
1.1 C (34.0 F)
1975
23.3 C (73.9 F)
1976
23.3 C (73.9 F)
1977
15.6 C (60.1 F)
1978
23.9 C (75.0 F)
1979
21.1 C (70.0 F)
1980
21.1 C (70.0 F)
1981
20.6 C (69.1 F)
1982
21.7 C (71.1 F)
1983
21.1 C (70.0 F)
1984
21.1 C (70.0 F)
1985
22.2 C (72.0 F)
1986
24.4 C (75.9 F)
1987
23.9 C (75.0 F)
1988
21.1 C (70.0 F)
1989
23.9 C (75.0 F)
1990
23.9 C (75.0 F)
1991
22.2 C (72.0 F)
1992
20.6 C (69.1 F)
1993
23.9 C (75.0 F)
1994
22.2 C (72.0 F)
1995
22.2 C (72.0 F)
1996
20.6 C (69.1 F)
1997
22.8 C (73.0 F)
1998
20.0 C (68.0 F)
1999
23.9 C (75.0 F)
2000
19.4 C (66.9 F)
2001
21.7 C (71.1 F)
2002
22.2 C (72.0 F)
2003
24.4 C (75.9 F)
2004
25.6 C (78.1 F)
2005
23.3 C (73.9 F)
2006
21.7 C (71.1 F)
2007
23.3 C (73.9 F)
2008
18.9 C (66.0 F)
2009
23.9 C (75.0 F)
2010
21.7 C (71.1 F)
2011
21.1 C (70.0 F)
2012
21.1 C (70.0 F)
2013
25.6 C (78.1 F)
2014
22.2 C (72.0 F)
2015
24.4 C (75.9 F)
2016
22.8 C (73.0 F)
Coldest night (TNn)
The coldest night of the year at Glen Alps, 1971 to 2016. The record is -38.3 C (-36.9 F) in 1989, marked on the chart; the median year is -25.0 C (-13.0 F).
Coldest night (TNn) at Glen Alps by year
Year
Coldest night (TNn)
1971
-20.0 C (-4.0 F)
1972
-23.9 C (-11.0 F)
1975
-30.6 C (-23.1 F)
1976
-25.6 C (-14.1 F)
1977
-23.3 C (-9.9 F)
1978
-21.1 C (-6.0 F)
1979
-26.7 C (-16.1 F)
1980
-30.0 C (-22.0 F)
1981
-22.2 C (-8.0 F)
1982
-28.9 C (-20.0 F)
1983
-29.4 C (-20.9 F)
1984
-28.3 C (-18.9 F)
1985
-24.4 C (-11.9 F)
1986
-25.0 C (-13.0 F)
1987
-23.3 C (-9.9 F)
1988
-25.6 C (-14.1 F)
1989
-38.3 C (-36.9 F)
1990
-28.9 C (-20.0 F)
1991
-24.4 C (-11.9 F)
1992
-26.1 C (-15.0 F)
1993
-28.3 C (-18.9 F)
1994
-25.6 C (-14.1 F)
1995
-26.1 C (-15.0 F)
1996
-27.8 C (-18.0 F)
1997
-28.3 C (-18.9 F)
1998
-25.0 C (-13.0 F)
1999
-36.7 C (-34.1 F)
2000
-27.8 C (-18.0 F)
2001
-22.8 C (-9.0 F)
2002
-22.2 C (-8.0 F)
2003
-24.4 C (-11.9 F)
2004
-22.8 C (-9.0 F)
2005
-21.7 C (-7.1 F)
2006
-25.0 C (-13.0 F)
2007
-25.6 C (-14.1 F)
2008
-23.9 C (-11.0 F)
2009
-26.1 C (-15.0 F)
2010
-20.0 C (-4.0 F)
2011
-24.4 C (-11.9 F)
2012
-24.4 C (-11.9 F)
2013
-26.7 C (-16.1 F)
2014
-22.2 C (-8.0 F)
2015
-23.3 C (-9.9 F)
2016
-10.6 C (12.9 F)
Wettest day (Rx1day)
The wettest day of the year at Glen Alps, 1971 to 2016. The record is 88.9 mm (3.5 in) in 1975, marked on the chart; the median year is 35.4 mm (1.4 in).
Wettest day (Rx1day) at Glen Alps by year
Year
Wettest day (Rx1day)
1971
30.5 mm (1.2 in)
1972
5.1 mm (0.20 in)
1975
88.9 mm (3.5 in)
1976
66.0 mm (2.6 in)
1977
49.3 mm (1.9 in)
1978
32.8 mm (1.3 in)
1979
39.4 mm (1.6 in)
1980
41.4 mm (1.6 in)
1981
30.2 mm (1.2 in)
1982
48.5 mm (1.9 in)
1983
41.4 mm (1.6 in)
1984
23.6 mm (0.9 in)
1985
27.7 mm (1.1 in)
1986
24.6 mm (1.0 in)
1987
28.2 mm (1.1 in)
1988
28.2 mm (1.1 in)
1989
87.6 mm (3.4 in)
1990
34.5 mm (1.4 in)
1991
32.3 mm (1.3 in)
1992
38.6 mm (1.5 in)
1993
29.7 mm (1.2 in)
1994
24.1 mm (0.9 in)
1995
52.3 mm (2.1 in)
1996
26.4 mm (1.0 in)
1997
54.4 mm (2.1 in)
1998
34.5 mm (1.4 in)
1999
46.0 mm (1.8 in)
2000
26.7 mm (1.1 in)
2001
27.2 mm (1.1 in)
2002
37.1 mm (1.5 in)
2003
36.3 mm (1.4 in)
2004
56.9 mm (2.2 in)
2005
30.5 mm (1.2 in)
2006
40.6 mm (1.6 in)
2007
49.8 mm (2.0 in)
2008
37.6 mm (1.5 in)
2009
27.2 mm (1.1 in)
2010
26.4 mm (1.0 in)
2011
58.4 mm (2.3 in)
2012
46.0 mm (1.8 in)
2013
42.9 mm (1.7 in)
2014
25.9 mm (1.0 in)
2015
34.3 mm (1.4 in)
2016
74.2 mm (2.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Glen Alps, 1971 to 2016. The record is 153.5 mm (6.0 in) in 1989, marked on the chart; the median year is 60.1 mm (2.4 in).
Wettest five days (Rx5day) at Glen Alps by year
Year
Wettest five days (Rx5day)
1971
53.1 mm (2.1 in)
1972
8.9 mm (0.35 in)
1975
89.4 mm (3.5 in)
1976
136.4 mm (5.4 in)
1977
116.3 mm (4.6 in)
1978
51.6 mm (2.0 in)
1979
77.6 mm (3.1 in)
1980
73.9 mm (2.9 in)
1981
68.4 mm (2.7 in)
1982
115.1 mm (4.5 in)
1983
54.1 mm (2.1 in)
1984
51.0 mm (2.0 in)
1985
48.0 mm (1.9 in)
1986
48.8 mm (1.9 in)
1987
50.2 mm (2.0 in)
1988
59.2 mm (2.3 in)
1989
153.5 mm (6.0 in)
1990
49.3 mm (1.9 in)
1991
49.5 mm (1.9 in)
1992
53.8 mm (2.1 in)
1993
62.0 mm (2.4 in)
1994
54.4 mm (2.1 in)
1995
75.6 mm (3.0 in)
1996
45.7 mm (1.8 in)
1997
77.8 mm (3.1 in)
1998
60.9 mm (2.4 in)
1999
80.2 mm (3.2 in)
2000
51.7 mm (2.0 in)
2001
48.5 mm (1.9 in)
2002
67.8 mm (2.7 in)
2003
57.2 mm (2.3 in)
2004
91.2 mm (3.6 in)
2005
63.3 mm (2.5 in)
2006
85.9 mm (3.4 in)
2007
55.4 mm (2.2 in)
2008
39.9 mm (1.6 in)
2009
58.7 mm (2.3 in)
2010
43.8 mm (1.7 in)
2011
71.8 mm (2.8 in)
2012
146.1 mm (5.8 in)
2013
86.1 mm (3.4 in)
2014
47.5 mm (1.9 in)
2015
63.7 mm (2.5 in)
2016
75.2 mm (3.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Glen Alps, 1971 to 2016. The record is 47 days in 1996, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Glen Alps by year
Year
Longest dry spell (CDD)
1971
9 days
1972
19 days
1975
33 days
1976
25 days
1977
30 days
1978
22 days
1979
30 days
1980
21 days
1981
27 days
1982
19 days
1983
34 days
1984
28 days
1985
22 days
1986
25 days
1987
23 days
1988
16 days
1989
24 days
1990
31 days
1991
14 days
1992
19 days
1993
15 days
1994
24 days
1995
19 days
1996
47 days
1997
19 days
1998
19 days
1999
19 days
2000
15 days
2001
17 days
2002
19 days
2003
18 days
2004
27 days
2005
23 days
2006
22 days
2007
24 days
2008
15 days
2009
32 days
2010
41 days
2011
3 days
2012
20 days
2013
26 days
2014
43 days
2015
16 days
2016
41 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
35 years with a frost
Across 35 years with a frost, the median last spring frost at Glen Alps falls on 22 May and the median first autumn frost on 20 September, which leaves a median of 118 days between them.
Fitted over all years, the growing season changes by +5.3 days per decade at this station.
Frost dates and growing season at Glen Alps
Measure
Median, all years
Earliest period
Recent period (1983 to 2015)
Recent against earliest
Fitted trend
Last spring frost
22 May
n/a
23 May
n/a
-2.0 days per decade
First autumn frost
20 September
n/a
20 September
n/a
+3.2 days per decade
Growing days
118 days
n/a
119 days
n/a
+5.3 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
34 years, 1978 to 2015
A day with at least 33.4 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 84.7 mm (3.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Glen Alps: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
33.4 mm (1.3 in)
5 years
43.1 mm (1.7 in)
10 years
50.8 mm (2.0 in)
25 years
62.6 mm (2.5 in)
50 years
72.9 mm (2.9 in)
Longer than the 34 years of record
100 years
84.7 mm (3.3 in)
Longer than the 34 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, 34 years of values from 1978 to 2015.
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: 87.6 mm (3.4 in) in 1989; 54.4 mm (2.1 in) in 1997; 52.3 mm (2.1 in) in 1995.
Download the Data
Data for Glen Alps standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Glen Alps 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.