Record envelope, standing records and threshold days for Skagit Pwr Plt (USC00457690), Washington, United States, with 50 years of record.
Key Facts for Skagit Pwr Plt
Skagit Pwr Plt (USC00457690) is a weather station in Washington, United States at 48.68 latitude and -121.25 longitude, 162 m (531 ft) above sea level.
The station reports from 1909 to 1958, 50 years of record.
1,464 records set at Skagit Pwr Plt still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Skagit Pwr Plt set a daily record high maximum temperature of 10.0 C (50.0 F) on 31 December 1958.
About the Station
Location: Washington, United States, 48.68 latitude, -121.25 longitude.
Elevation: 162 m (531 ft).
Period of record: 1909 to 1958, 50 years.
Eligible elements: tmax, tmin, prcp.
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 Skagit Pwr Plt. 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 Skagit Pwr Plt, 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)
-17.8 C (0.0 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-15.6 C (3.9 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-10.0 C (14.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-3.3 C (26.1 F)
n/a
n/a
May
36.7 C (98.1 F)
-0.6 C (30.9 F)
n/a
n/a
Jun
42.8 C (109.0 F)
1.7 C (35.1 F)
n/a
n/a
Jul
42.8 C (109.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
4.4 C (39.9 F)
n/a
n/a
Sep
37.2 C (99.0 F)
0.0 C (32.0 F)
n/a
n/a
Oct
28.3 C (82.9 F)
-5.0 C (23.0 F)
n/a
n/a
Nov
20.0 C (68.0 F)
-13.9 C (7.0 F)
n/a
n/a
Dec
16.1 C (61.0 F)
-12.2 C (10.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Skagit Pwr Plt still stand. 1934 holds the most, with 86.
Standing records at Skagit Pwr Plt by the year they were set
Year set
Standing records
1909
18
1910
38
1911
33
1912
52
1913
45
1914
10
1925
39
1926
61
1927
31
1928
25
1929
21
1930
22
1931
44
1932
39
1933
33
1934
86
1935
45
1936
41
1937
35
1938
21
1939
29
1940
45
1941
58
1942
40
1943
29
1944
51
1945
31
1946
19
1947
30
1948
30
1949
38
1950
43
1951
28
1952
33
1953
23
1954
38
1955
51
1956
29
1957
27
1958
53
All-Time Record Progression
2 new records
2 all-time records were set at Skagit Pwr Plt between 10 February 1951 and 28 July 1958. Each dot is a new record.
When Skagit Pwr Plt set new all-time records
Date
Kind
Detail
1951-02-10
Record daily precipitation
Record daily precipitation 146.6 mm (5.8 in)
1958-07-28
Record high minimum temperature
Record high minimum temperature 21.1 C (70.0 F)
Wettest Day of Each Month
Feb: 146.6 mm (5.8 in)
The wettest day on record for each calendar month at Skagit Pwr Plt. The most was 146.6 mm (5.8 in) on 10 February 1951.
Record daily precipitation for each month at Skagit Pwr Plt
Month
Record daily precipitation (mm)
Date
Jan
104.6 mm (4.1 in)
24 January 1935
Feb
146.6 mm (5.8 in)
10 February 1951
Mar
69.9 mm (2.8 in)
4 March 1950
Apr
52.1 mm (2.1 in)
20 April 1937
May
39.1 mm (1.5 in)
28 May 1939
Jun
40.6 mm (1.6 in)
2 June 1936
Jul
46.7 mm (1.8 in)
12 July 1934
Aug
50.8 mm (2.0 in)
15 August 1950
Sep
64.0 mm (2.5 in)
5 September 1931
Oct
114.6 mm (4.5 in)
25 October 1955
Nov
106.9 mm (4.2 in)
26 November 1949
Dec
106.4 mm (4.2 in)
27 December 1949
Period of Record Coverage
1909 to 1958
Complete yearUnder 90 percent of days
40 years of record at Skagit Pwr Plt, 1909 to 1958. 11 years have data for under 90 percent of days and are left out of rankings: 1909, 1910, 1914, 1925, 1936, 1937, 1940, 1945 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 33 complete years at Skagit Pwr Plt, 1911 to 1958. Blue stripes are years cooler than the station's own mean of 10.2 C (50.3 F); red stripes are warmer. The coolest year was 1913, at 8.6 C (47.5 F), and the warmest was 1934, at 12.2 C (54.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Skagit Pwr Plt as warming stripes, 1911 to 1958
Year
Annual mean temperature
Difference from the station mean
1911
9.0 C
-1.22 C
1912
9.6 C
-0.58 C
1913
8.6 C
-1.59 C
1926
11.5 C
+1.36 C
1927
9.8 C
-0.43 C
1928
10.4 C
+0.26 C
1929
9.5 C
-0.70 C
1930
9.9 C
-0.27 C
1931
10.6 C
+0.45 C
1932
10.2 C
-0.01 C
1933
9.8 C
-0.35 C
1934
12.2 C
+2.02 C
1935
10.1 C
-0.06 C
1936
9.9 C
-0.26 C
1938
10.9 C
+0.75 C
1939
10.7 C
+0.48 C
1940
11.5 C
+1.33 C
1941
11.6 C
+1.43 C
1942
11.0 C
+0.84 C
1943
10.0 C
-0.21 C
1944
10.6 C
+0.42 C
1946
10.0 C
-0.23 C
1947
10.7 C
+0.51 C
1948
9.2 C
-1.01 C
1949
9.5 C
-0.73 C
1950
8.9 C
-1.29 C
1951
9.9 C
-0.29 C
1952
10.2 C
+0.01 C
1953
10.2 C
+0.03 C
1954
9.0 C
-1.14 C
1956
9.4 C
-0.75 C
1957
9.9 C
-0.31 C
1958
11.7 C
+1.47 C
The fitted trend in annual mean temperature here over 1911 to 1958 is 0.1 C (-0.2 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.3 to 0.6) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Skagit Pwr Plt
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.3) per decade
0.2 F (-0.3 to 0.6) per decade
1911 to 1958
33
Not clearly different from zero
Mean daily maximum
0.01 C (-0.31 to 0.32) per decade
0.01 F (-0.56 to 0.58) per decade
1911 to 1958
33
Not clearly different from zero
Mean daily minimum
0.2 C (-0.1 to 0.4) per decade
0.3 F (-0.1 to 0.7) per decade
1911 to 1958
33
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
1909 to 1958
Yearly extremes at Skagit Pwr Plt: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
1925
37.8 C (100.0 F)
40
Coldest night (TNn)
-17.8 C (0.0 F)
1950
-11.4 C (11.5 F)
40
Wettest day (Rx1day)
146.6 mm (5.8 in)
1951
74.0 mm (2.9 in)
40
Wettest five days (Rx5day)
349.0 mm (13.7 in)
1951
182.2 mm (7.2 in)
40
Longest dry spell (CDD)
64 days
1926
23 days
40
Hottest day (TXx)
The hottest day of the year at Skagit Pwr Plt, 1909 to 1958. The record is 42.8 C (109.0 F) in 1925, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Skagit Pwr Plt by year
Year
Hottest day (TXx)
1909
33.3 C (91.9 F)
1910
36.7 C (98.1 F)
1911
40.6 C (105.1 F)
1912
36.7 C (98.1 F)
1913
37.8 C (100.0 F)
1914
25.6 C (78.1 F)
1925
42.8 C (109.0 F)
1926
41.7 C (107.1 F)
1927
40.6 C (105.1 F)
1928
37.8 C (100.0 F)
1929
35.0 C (95.0 F)
1930
39.4 C (102.9 F)
1931
37.8 C (100.0 F)
1932
37.2 C (99.0 F)
1933
40.6 C (105.1 F)
1934
38.3 C (100.9 F)
1935
40.0 C (104.0 F)
1936
35.6 C (96.1 F)
1937
40.0 C (104.0 F)
1938
41.7 C (107.1 F)
1939
37.8 C (100.0 F)
1940
38.9 C (102.0 F)
1941
42.8 C (109.0 F)
1942
41.1 C (106.0 F)
1943
32.8 C (91.0 F)
1944
40.6 C (105.1 F)
1945
40.0 C (104.0 F)
1946
40.6 C (105.1 F)
1947
37.2 C (99.0 F)
1948
36.7 C (98.1 F)
1949
35.6 C (96.1 F)
1950
35.0 C (95.0 F)
1951
38.9 C (102.0 F)
1952
36.7 C (98.1 F)
1953
36.7 C (98.1 F)
1954
31.1 C (88.0 F)
1955
37.2 C (99.0 F)
1956
37.8 C (100.0 F)
1957
32.2 C (90.0 F)
1958
40.0 C (104.0 F)
Coldest night (TNn)
The coldest night of the year at Skagit Pwr Plt, 1909 to 1958. The record is -17.8 C (0.0 F) in 1950, marked on the chart; the median year is -11.4 C (11.5 F).
Coldest night (TNn) at Skagit Pwr Plt by year
Year
Coldest night (TNn)
1909
-9.4 C (15.1 F)
1910
-12.2 C (10.0 F)
1911
-16.1 C (3.0 F)
1912
-11.1 C (12.0 F)
1913
-10.6 C (12.9 F)
1914
-12.2 C (10.0 F)
1925
-4.4 C (24.1 F)
1926
-12.2 C (10.0 F)
1927
-14.4 C (6.1 F)
1928
-8.3 C (17.1 F)
1929
-15.6 C (3.9 F)
1930
-13.3 C (8.1 F)
1931
-5.0 C (23.0 F)
1932
-13.9 C (7.0 F)
1933
-15.6 C (3.9 F)
1934
-6.7 C (19.9 F)
1935
-17.2 C (1.0 F)
1936
-15.6 C (3.9 F)
1937
-12.8 C (9.0 F)
1938
-6.1 C (21.0 F)
1939
-10.0 C (14.0 F)
1940
-6.1 C (21.0 F)
1941
-7.8 C (18.0 F)
1942
-9.4 C (15.1 F)
1943
-17.2 C (1.0 F)
1944
-6.1 C (21.0 F)
1945
-7.2 C (19.0 F)
1946
-7.2 C (19.0 F)
1947
-11.1 C (12.0 F)
1948
-8.9 C (16.0 F)
1949
-11.7 C (10.9 F)
1950
-17.8 C (0.0 F)
1951
-12.8 C (9.0 F)
1952
-11.1 C (12.0 F)
1953
-4.4 C (24.1 F)
1954
-12.2 C (10.0 F)
1955
-13.9 C (7.0 F)
1956
-11.7 C (10.9 F)
1957
-13.9 C (7.0 F)
1958
-3.9 C (25.0 F)
Wettest day (Rx1day)
The wettest day of the year at Skagit Pwr Plt, 1909 to 1958. The record is 146.6 mm (5.8 in) in 1951, marked on the chart; the median year is 74.0 mm (2.9 in).
Wettest day (Rx1day) at Skagit Pwr Plt by year
Year
Wettest day (Rx1day)
1909
101.6 mm (4.0 in)
1910
75.7 mm (3.0 in)
1911
84.8 mm (3.3 in)
1912
55.6 mm (2.2 in)
1913
72.4 mm (2.9 in)
1914
66.5 mm (2.6 in)
1925
55.9 mm (2.2 in)
1926
63.8 mm (2.5 in)
1927
57.4 mm (2.3 in)
1928
78.5 mm (3.1 in)
1929
54.4 mm (2.1 in)
1930
52.8 mm (2.1 in)
1931
74.2 mm (2.9 in)
1932
118.4 mm (4.7 in)
1933
75.2 mm (3.0 in)
1934
99.3 mm (3.9 in)
1935
104.6 mm (4.1 in)
1936
73.7 mm (2.9 in)
1937
98.0 mm (3.9 in)
1938
66.0 mm (2.6 in)
1939
76.2 mm (3.0 in)
1940
53.8 mm (2.1 in)
1941
57.4 mm (2.3 in)
1942
58.7 mm (2.3 in)
1943
78.7 mm (3.1 in)
1944
63.0 mm (2.5 in)
1945
112.3 mm (4.4 in)
1946
82.8 mm (3.3 in)
1947
54.6 mm (2.1 in)
1948
61.7 mm (2.4 in)
1949
106.9 mm (4.2 in)
1950
69.9 mm (2.8 in)
1951
146.6 mm (5.8 in)
1952
50.8 mm (2.0 in)
1953
77.7 mm (3.1 in)
1954
57.9 mm (2.3 in)
1955
114.6 mm (4.5 in)
1956
98.8 mm (3.9 in)
1957
59.9 mm (2.4 in)
1958
88.1 mm (3.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Skagit Pwr Plt, 1909 to 1958. The record is 349.0 mm (13.7 in) in 1951, marked on the chart; the median year is 182.2 mm (7.2 in).
Wettest five days (Rx5day) at Skagit Pwr Plt by year
Year
Wettest five days (Rx5day)
1909
228.7 mm (9.0 in)
1910
177.7 mm (7.0 in)
1911
213.6 mm (8.4 in)
1912
143.5 mm (5.6 in)
1913
176.2 mm (6.9 in)
1914
240.4 mm (9.5 in)
1925
203.4 mm (8.0 in)
1926
128.8 mm (5.1 in)
1927
149.2 mm (5.9 in)
1928
152.2 mm (6.0 in)
1929
133.9 mm (5.3 in)
1930
141.7 mm (5.6 in)
1931
152.9 mm (6.0 in)
1932
278.7 mm (11.0 in)
1933
255.0 mm (10.0 in)
1934
211.8 mm (8.3 in)
1935
277.3 mm (10.9 in)
1936
178.2 mm (7.0 in)
1937
221.7 mm (8.7 in)
1938
219.9 mm (8.7 in)
1939
246.8 mm (9.7 in)
1940
144.0 mm (5.7 in)
1941
130.8 mm (5.1 in)
1942
131.2 mm (5.2 in)
1943
153.7 mm (6.1 in)
1944
137.4 mm (5.4 in)
1945
250.9 mm (9.9 in)
1946
209.1 mm (8.2 in)
1947
195.2 mm (7.7 in)
1948
189.3 mm (7.5 in)
1949
233.3 mm (9.2 in)
1950
162.0 mm (6.4 in)
1951
349.0 mm (13.7 in)
1952
118.3 mm (4.7 in)
1953
183.4 mm (7.2 in)
1954
164.9 mm (6.5 in)
1955
219.3 mm (8.6 in)
1956
227.6 mm (9.0 in)
1957
181.0 mm (7.1 in)
1958
167.7 mm (6.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Skagit Pwr Plt, 1909 to 1958. The record is 64 days in 1926, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Skagit Pwr Plt by year
Year
Longest dry spell (CDD)
1909
16 days
1910
22 days
1911
28 days
1912
19 days
1913
15 days
1914
10 days
1925
31 days
1926
64 days
1927
11 days
1928
26 days
1929
18 days
1930
24 days
1931
34 days
1932
31 days
1933
18 days
1934
30 days
1935
25 days
1936
43 days
1937
26 days
1938
29 days
1939
29 days
1940
42 days
1941
16 days
1942
17 days
1943
20 days
1944
25 days
1945
20 days
1946
14 days
1947
14 days
1948
14 days
1949
17 days
1950
30 days
1951
48 days
1952
38 days
1953
19 days
1954
13 days
1955
24 days
1956
26 days
1957
18 days
1958
20 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
33 years with a frost
Across 33 years with a frost, the median last spring frost at Skagit Pwr Plt falls on 11 April and the median first autumn frost on 6 November, which leaves a median of 204 days between them.
Fitted over all years, the growing season changes by +7.8 days per decade at this station.
Frost dates and growing season at Skagit Pwr Plt
Measure
Median, all years
Earliest period
Recent period (1926 to 1958)
Recent against earliest
Fitted trend
Last spring frost
11 April
n/a
10 April
n/a
-2.4 days per decade
First autumn frost
6 November
n/a
8 November
n/a
+5.4 days per decade
Growing days
204 days
n/a
206 days
n/a
+7.8 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
33 years, 1911 to 1958
A day with at least 74.0 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 165.0 mm (6.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Skagit Pwr Plt: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
74.0 mm (2.9 in)
5 years
94.8 mm (3.7 in)
10 years
110.0 mm (4.3 in)
25 years
130.7 mm (5.1 in)
50 years
147.3 mm (5.8 in)
Longer than the 33 years of record
100 years
165.0 mm (6.5 in)
Longer than the 33 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, 33 years of values from 1911 to 1958.
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: 146.6 mm (5.8 in) in 1951; 118.4 mm (4.7 in) in 1932; 114.6 mm (4.5 in) in 1955.
Download the Data
Data for Skagit Pwr Plt standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Skagit Pwr Plt 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.