Record envelope, standing records and threshold days for Wasilla 3 S (USC00509759), Alaska, United States, with 56 years of record.
Key Facts for Wasilla 3 S
Wasilla 3 S (USC00509759) is a weather station in Alaska, United States at 61.53 latitude and -149.43 longitude, 15 m (50 ft) above sea level.
The station reports from 1944 to 1999, 56 years of record.
1,464 records set at Wasilla 3 S still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Wasilla 3 S set a daily record precipitation of 19.6 mm (0.8 in) on 20 June 1999.
About the Station
Location: Alaska, United States, 61.53 latitude, -149.43 longitude.
Elevation: 15 m (50 ft).
Period of record: 1944 to 1999, 56 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 Wasilla 3 S. 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 Wasilla 3 S, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.1 C (52.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-42.8 C (-45.0 F)
n/a
n/a
Mar
12.8 C (55.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Apr
20.0 C (68.0 F)
-22.2 C (-8.0 F)
n/a
n/a
May
28.9 C (84.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Jun
32.2 C (90.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
30.6 C (87.1 F)
0.0 C (32.0 F)
n/a
n/a
Aug
28.3 C (82.9 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
24.4 C (75.9 F)
-10.6 C (12.9 F)
n/a
n/a
Oct
19.4 C (66.9 F)
-23.9 C (-11.0 F)
n/a
n/a
Nov
13.3 C (55.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Dec
10.6 C (51.1 F)
-38.9 C (-38.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wasilla 3 S still stand. 1947 holds the most, with 73.
Standing records at Wasilla 3 S by the year they were set
Year set
Standing records
1944
4
1945
54
1946
46
1947
73
1948
50
1949
60
1950
22
1951
13
1954
4
1955
33
1956
31
1957
39
1958
25
1959
19
1960
20
1961
18
1962
26
1963
25
1964
30
1965
24
1966
15
1967
34
1968
21
1969
45
1970
24
1971
31
1972
34
1973
10
1974
23
1975
31
1976
16
1977
36
1978
17
1979
31
1980
34
1981
40
1982
31
1983
12
1984
16
1985
39
1986
27
1987
21
1988
10
1989
30
1990
29
1991
10
1992
31
1993
28
1994
11
1995
29
1996
32
1997
27
1998
9
1999
14
All-Time Record Progression
1 new records
1 all-time records were set at Wasilla 3 S between 20 July 1986 and 20 July 1986. Each dot is a new record.
When Wasilla 3 S set new all-time records
Date
Kind
Detail
1986-07-20
Record daily precipitation
Record daily precipitation 46.0 mm (1.8 in)
Wettest Day of Each Month
Jul: 46.0 mm (1.8 in)
The wettest day on record for each calendar month at Wasilla 3 S. The most was 46.0 mm (1.8 in) on 20 July 1986.
Record daily precipitation for each month at Wasilla 3 S
Month
Record daily precipitation (mm)
Date
Jan
30.0 mm (1.2 in)
12 January 1963
Feb
26.2 mm (1.0 in)
6 February 1981
Mar
21.6 mm (0.9 in)
16 March 1995
Apr
21.8 mm (0.9 in)
17 April 1975
May
18.8 mm (0.7 in)
27 May 1969
Jun
37.8 mm (1.5 in)
21 June 1949
Jul
46.0 mm (1.8 in)
20 July 1986
Aug
43.9 mm (1.7 in)
8 August 1971
Sep
41.4 mm (1.6 in)
16 September 1948
Oct
37.6 mm (1.5 in)
11 October 1986
Nov
45.5 mm (1.8 in)
25 November 1966
Dec
26.4 mm (1.0 in)
29 December 1955
Period of Record Coverage
1944 to 1999
Complete yearUnder 90 percent of days
54 years of record at Wasilla 3 S, 1944 to 1999. 14 years have data for under 90 percent of days and are left out of rankings: 1944, 1945, 1951, 1954, 1957, 1958, 1959, 1961 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 36 complete years at Wasilla 3 S, 1946 to 1996. Blue stripes are years cooler than the station's own mean of 2.3 C (36.1 F); red stripes are warmer. The coolest year was 1948, at 0.0 C (32.0 F), and the warmest was 1981, at 4.5 C (40.1 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Wasilla 3 S as warming stripes, 1946 to 1996
Year
Annual mean temperature
Difference from the station mean
1946
0.2 C
-2.15 C
1947
2.2 C
-0.12 C
1948
0.0 C
-2.30 C
1949
0.6 C
-1.67 C
1950
0.9 C
-1.45 C
1960
3.4 C
+1.14 C
1963
2.6 C
+0.30 C
1965
1.5 C
-0.79 C
1967
2.4 C
+0.13 C
1968
2.0 C
-0.34 C
1969
3.1 C
+0.77 C
1970
2.2 C
-0.12 C
1971
0.6 C
-1.73 C
1972
0.6 C
-1.74 C
1973
1.0 C
-1.30 C
1974
2.4 C
+0.08 C
1975
1.1 C
-1.23 C
1976
3.2 C
+0.93 C
1977
3.6 C
+1.25 C
1978
4.0 C
+1.66 C
1979
3.4 C
+1.12 C
1980
2.8 C
+0.52 C
1981
4.5 C
+2.20 C
1982
1.7 C
-0.62 C
1983
3.0 C
+0.71 C
1985
2.2 C
-0.09 C
1986
3.8 C
+1.49 C
1987
4.1 C
+1.75 C
1988
3.5 C
+1.23 C
1989
2.0 C
-0.31 C
1990
1.6 C
-0.75 C
1991
2.7 C
+0.37 C
1993
4.0 C
+1.70 C
1994
2.5 C
+0.22 C
1995
2.7 C
+0.44 C
1996
0.8 C
-1.46 C
The annual mean temperature here has risen by 0.4 C (0.1 to 0.7) per decade over 1946 to 1996. In Fahrenheit: 0.7 F (0.3 to 1.2) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Wasilla 3 S
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.4 C (0.1 to 0.7) per decade
0.7 F (0.3 to 1.2) per decade
1946 to 1996
36
Rise
Mean daily maximum
0.21 C (-0.02 to 0.44) per decade
0.37 F (-0.03 to 0.78) per decade
1946 to 1996
36
Not clearly different from zero
Mean daily minimum
0.6 C (0.3 to 0.9) per decade
1.1 F (0.5 to 1.6) per decade
1946 to 1996
36
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
1944 to 1999
Yearly extremes at Wasilla 3 S: 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)
1969
27.0 C (80.5 F)
54
Coldest night (TNn)
-45.6 C (-50.1 F)
1947
-32.7 C (-26.9 F)
54
Wettest day (Rx1day)
46.0 mm (1.8 in)
1986
26.9 mm (1.1 in)
54
Wettest five days (Rx5day)
99.0 mm (3.9 in)
1959
49.2 mm (1.9 in)
54
Longest dry spell (CDD)
85 days
1978
31 days
54
Hottest day (TXx)
The hottest day of the year at Wasilla 3 S, 1944 to 1999. The record is 32.2 C (90.0 F) in 1969, marked on the chart; the median year is 27.0 C (80.5 F).
Hottest day (TXx) at Wasilla 3 S by year
Year
Hottest day (TXx)
1944
10.0 C (50.0 F)
1945
24.4 C (75.9 F)
1946
27.8 C (82.0 F)
1947
30.0 C (86.0 F)
1948
29.4 C (84.9 F)
1949
26.7 C (80.1 F)
1950
27.8 C (82.0 F)
1951
24.4 C (75.9 F)
1954
10.0 C (50.0 F)
1955
28.9 C (84.0 F)
1956
27.8 C (82.0 F)
1957
27.2 C (81.0 F)
1958
27.2 C (81.0 F)
1959
23.9 C (75.0 F)
1960
28.9 C (84.0 F)
1961
25.6 C (78.1 F)
1962
27.2 C (81.0 F)
1963
25.0 C (77.0 F)
1964
24.4 C (75.9 F)
1965
24.4 C (75.9 F)
1966
27.2 C (81.0 F)
1967
29.4 C (84.9 F)
1968
28.3 C (82.9 F)
1969
32.2 C (90.0 F)
1970
26.7 C (80.1 F)
1971
26.7 C (80.1 F)
1972
30.6 C (87.1 F)
1973
23.3 C (73.9 F)
1974
27.2 C (81.0 F)
1975
27.8 C (82.0 F)
1976
26.7 C (80.1 F)
1977
28.3 C (82.9 F)
1978
28.3 C (82.9 F)
1979
26.7 C (80.1 F)
1980
25.6 C (78.1 F)
1981
25.0 C (77.0 F)
1982
25.6 C (78.1 F)
1983
26.1 C (79.0 F)
1984
25.6 C (78.1 F)
1985
26.7 C (80.1 F)
1986
27.2 C (81.0 F)
1987
28.3 C (82.9 F)
1988
24.4 C (75.9 F)
1989
28.9 C (84.0 F)
1990
27.2 C (81.0 F)
1991
26.1 C (79.0 F)
1992
26.1 C (79.0 F)
1993
28.3 C (82.9 F)
1994
27.2 C (81.0 F)
1995
27.8 C (82.0 F)
1996
26.1 C (79.0 F)
1997
27.8 C (82.0 F)
1998
26.7 C (80.1 F)
1999
25.6 C (78.1 F)
Coldest night (TNn)
The coldest night of the year at Wasilla 3 S, 1944 to 1999. The record is -45.6 C (-50.1 F) in 1947, marked on the chart; the median year is -32.7 C (-26.9 F).
Coldest night (TNn) at Wasilla 3 S by year
Year
Coldest night (TNn)
1944
-34.4 C (-29.9 F)
1945
-34.4 C (-29.9 F)
1946
-37.2 C (-35.0 F)
1947
-45.6 C (-50.1 F)
1948
-35.6 C (-32.1 F)
1949
-41.7 C (-43.1 F)
1950
-36.7 C (-34.1 F)
1951
-39.4 C (-38.9 F)
1954
-34.4 C (-29.9 F)
1955
-33.9 C (-29.0 F)
1956
-34.4 C (-29.9 F)
1957
-31.1 C (-24.0 F)
1958
-28.9 C (-20.0 F)
1959
-29.4 C (-20.9 F)
1960
-31.7 C (-25.1 F)
1961
-29.4 C (-20.9 F)
1962
-32.2 C (-26.0 F)
1963
-33.3 C (-27.9 F)
1964
-36.1 C (-33.0 F)
1965
-30.6 C (-23.1 F)
1966
-30.0 C (-22.0 F)
1967
-29.4 C (-20.9 F)
1968
-33.3 C (-27.9 F)
1969
-30.0 C (-22.0 F)
1970
-33.3 C (-27.9 F)
1971
-36.7 C (-34.1 F)
1972
-38.9 C (-38.0 F)
1973
-36.1 C (-33.0 F)
1974
-32.2 C (-26.0 F)
1975
-40.0 C (-40.0 F)
1976
-28.9 C (-20.0 F)
1977
-28.9 C (-20.0 F)
1978
-27.8 C (-18.0 F)
1979
-33.3 C (-27.9 F)
1980
-34.4 C (-29.9 F)
1981
-28.3 C (-18.9 F)
1982
-27.2 C (-17.0 F)
1983
-31.7 C (-25.1 F)
1984
-33.3 C (-27.9 F)
1985
-27.2 C (-17.0 F)
1986
-29.4 C (-20.9 F)
1987
-30.0 C (-22.0 F)
1988
-29.4 C (-20.9 F)
1989
-40.0 C (-40.0 F)
1990
-33.3 C (-27.9 F)
1991
-30.0 C (-22.0 F)
1992
-31.7 C (-25.1 F)
1993
-38.3 C (-36.9 F)
1994
-28.9 C (-20.0 F)
1995
-32.2 C (-26.0 F)
1996
-32.2 C (-26.0 F)
1997
-34.4 C (-29.9 F)
1998
-10.0 C (14.0 F)
1999
-41.1 C (-42.0 F)
Wettest day (Rx1day)
The wettest day of the year at Wasilla 3 S, 1944 to 1999. The record is 46.0 mm (1.8 in) in 1986, marked on the chart; the median year is 26.9 mm (1.1 in).
Wettest day (Rx1day) at Wasilla 3 S by year
Year
Wettest day (Rx1day)
1944
12.7 mm (0.5 in)
1945
26.4 mm (1.0 in)
1946
21.3 mm (0.8 in)
1947
30.7 mm (1.2 in)
1948
41.4 mm (1.6 in)
1949
37.8 mm (1.5 in)
1950
23.9 mm (0.9 in)
1951
16.8 mm (0.7 in)
1954
6.6 mm (0.26 in)
1955
26.4 mm (1.0 in)
1956
36.6 mm (1.4 in)
1957
32.3 mm (1.3 in)
1958
19.3 mm (0.8 in)
1959
42.4 mm (1.7 in)
1960
27.9 mm (1.1 in)
1961
31.5 mm (1.2 in)
1962
21.8 mm (0.9 in)
1963
30.0 mm (1.2 in)
1964
19.8 mm (0.8 in)
1965
23.4 mm (0.9 in)
1966
45.5 mm (1.8 in)
1967
28.4 mm (1.1 in)
1968
14.7 mm (0.6 in)
1969
28.4 mm (1.1 in)
1970
19.3 mm (0.8 in)
1971
43.9 mm (1.7 in)
1972
27.4 mm (1.1 in)
1973
24.4 mm (1.0 in)
1974
17.0 mm (0.7 in)
1975
22.4 mm (0.9 in)
1976
15.7 mm (0.6 in)
1977
34.5 mm (1.4 in)
1978
14.7 mm (0.6 in)
1979
31.0 mm (1.2 in)
1980
28.4 mm (1.1 in)
1981
32.8 mm (1.3 in)
1982
38.6 mm (1.5 in)
1983
32.0 mm (1.3 in)
1984
32.8 mm (1.3 in)
1985
29.2 mm (1.1 in)
1986
46.0 mm (1.8 in)
1987
24.4 mm (1.0 in)
1988
23.6 mm (0.9 in)
1989
33.8 mm (1.3 in)
1990
22.9 mm (0.9 in)
1991
25.4 mm (1.0 in)
1992
19.6 mm (0.8 in)
1993
23.1 mm (0.9 in)
1994
24.1 mm (0.9 in)
1995
21.6 mm (0.9 in)
1996
36.1 mm (1.4 in)
1997
42.9 mm (1.7 in)
1998
31.0 mm (1.2 in)
1999
19.6 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wasilla 3 S, 1944 to 1999. The record is 99.0 mm (3.9 in) in 1959, marked on the chart; the median year is 49.2 mm (1.9 in).
Wettest five days (Rx5day) at Wasilla 3 S by year
Year
Wettest five days (Rx5day)
1944
15.5 mm (0.6 in)
1945
54.2 mm (2.1 in)
1946
34.5 mm (1.4 in)
1947
55.8 mm (2.2 in)
1948
64.2 mm (2.5 in)
1949
78.2 mm (3.1 in)
1950
43.9 mm (1.7 in)
1951
34.8 mm (1.4 in)
1954
11.9 mm (0.5 in)
1955
43.4 mm (1.7 in)
1956
56.2 mm (2.2 in)
1957
52.8 mm (2.1 in)
1958
47.4 mm (1.9 in)
1959
99.0 mm (3.9 in)
1960
60.6 mm (2.4 in)
1961
63.8 mm (2.5 in)
1962
36.3 mm (1.4 in)
1963
67.0 mm (2.6 in)
1964
48.6 mm (1.9 in)
1965
53.6 mm (2.1 in)
1966
46.0 mm (1.8 in)
1967
76.7 mm (3.0 in)
1968
44.7 mm (1.8 in)
1969
51.5 mm (2.0 in)
1970
34.5 mm (1.4 in)
1971
79.3 mm (3.1 in)
1972
58.9 mm (2.3 in)
1973
41.1 mm (1.6 in)
1974
33.3 mm (1.3 in)
1975
56.6 mm (2.2 in)
1976
23.2 mm (0.9 in)
1977
49.7 mm (2.0 in)
1978
32.5 mm (1.3 in)
1979
85.9 mm (3.4 in)
1980
65.3 mm (2.6 in)
1981
77.0 mm (3.0 in)
1982
48.2 mm (1.9 in)
1983
59.5 mm (2.3 in)
1984
44.2 mm (1.7 in)
1985
37.1 mm (1.5 in)
1986
65.1 mm (2.6 in)
1987
55.7 mm (2.2 in)
1988
43.1 mm (1.7 in)
1989
76.0 mm (3.0 in)
1990
61.1 mm (2.4 in)
1991
40.6 mm (1.6 in)
1992
37.2 mm (1.5 in)
1993
40.1 mm (1.6 in)
1994
32.2 mm (1.3 in)
1995
36.1 mm (1.4 in)
1996
43.2 mm (1.7 in)
1997
57.5 mm (2.3 in)
1998
58.4 mm (2.3 in)
1999
28.5 mm (1.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wasilla 3 S, 1944 to 1999. The record is 85 days in 1978, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Wasilla 3 S by year
Year
Longest dry spell (CDD)
1944
20 days
1945
31 days
1946
34 days
1947
36 days
1948
32 days
1949
17 days
1950
80 days
1951
32 days
1954
12 days
1955
33 days
1956
39 days
1957
42 days
1958
26 days
1959
31 days
1960
23 days
1961
35 days
1962
25 days
1963
26 days
1964
21 days
1965
29 days
1966
19 days
1967
40 days
1968
36 days
1969
29 days
1970
24 days
1971
26 days
1972
41 days
1973
29 days
1974
37 days
1975
50 days
1976
30 days
1977
28 days
1978
85 days
1979
39 days
1980
29 days
1981
31 days
1982
25 days
1983
44 days
1984
34 days
1985
31 days
1986
73 days
1987
19 days
1988
38 days
1989
58 days
1990
50 days
1991
25 days
1992
25 days
1993
38 days
1994
42 days
1995
59 days
1996
41 days
1997
31 days
1998
31 days
1999
31 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
36 years with a frost
Across 36 years with a frost, the median last spring frost at Wasilla 3 S falls on 23 May and the median first autumn frost on 6 September, which leaves a median of 104 days between them.
Fitted over all years, the growing season changes by +12.6 days per decade at this station.
Frost dates and growing season at Wasilla 3 S
Measure
Median, all years
Earliest period
Recent period (1963 to 1996)
Recent against earliest
Fitted trend
Last spring frost
23 May
n/a
23 May
n/a
-6.3 days per decade
First autumn frost
6 September
n/a
8 September
n/a
+6.3 days per decade
Growing days
104 days
n/a
109 days
n/a
+12.6 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
35 years, 1947 to 1996
A day with at least 27.2 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 49.7 mm (2.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Wasilla 3 S: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
27.2 mm (1.1 in)
5 years
34.5 mm (1.4 in)
10 years
38.8 mm (1.5 in)
25 years
43.6 mm (1.7 in)
50 years
46.8 mm (1.8 in)
Longer than the 35 years of record
100 years
49.7 mm (2.0 in)
Longer than the 35 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, 35 years of values from 1947 to 1996.
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; 43.9 mm (1.7 in) in 1971; 41.4 mm (1.6 in) in 1948.
Download the Data
Data for Wasilla 3 S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wasilla 3 S 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.