Record envelope, standing records and threshold days for Cushman Dam (USC00451934), Washington, United States, with 60 years of record.
Key Facts for Cushman Dam
Cushman Dam (USC00451934) is a weather station in Washington, United States at 47.42 latitude and -123.22 longitude, 232 m (760 ft) above sea level.
The station reports from 1914 to 1973, 60 years of record.
1,464 records set at Cushman Dam still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Cushman Dam tied a daily record low minimum temperature of 3.3 C (37.9 F) on 29 May 1973.
About the Station
Location: Washington, United States, 47.42 latitude, -123.22 longitude.
Elevation: 232 m (760 ft).
Period of record: 1914 to 1973, 60 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 Cushman Dam. 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 Cushman Dam, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-18.9 C (-2.0 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)
-9.4 C (15.1 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-4.4 C (24.1 F)
n/a
n/a
May
33.9 C (93.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
1.1 C (34.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
3.3 C (37.9 F)
n/a
n/a
Aug
37.8 C (100.0 F)
3.3 C (37.9 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-13.3 C (8.1 F)
n/a
n/a
Dec
18.9 C (66.0 F)
-13.9 C (7.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Cushman Dam still stand. 1914 holds the most, with 70.
Standing records at Cushman Dam by the year they were set
Year set
Standing records
1914
70
1915
27
1916
3
1924
9
1925
53
1926
14
1927
12
1928
45
1929
23
1930
28
1931
30
1932
28
1933
27
1934
53
1935
45
1936
36
1937
22
1938
22
1939
37
1940
22
1941
39
1942
30
1943
29
1944
31
1945
26
1946
14
1947
23
1948
24
1949
39
1950
42
1951
27
1952
26
1953
17
1954
20
1955
51
1956
33
1957
19
1958
40
1959
15
1960
17
1961
25
1962
36
1963
26
1964
17
1965
15
1966
17
1967
19
1968
31
1969
21
1970
26
1971
26
1972
32
1973
5
Wettest Day of Each Month
Jan: 182.9 mm (7.2 in)
The wettest day on record for each calendar month at Cushman Dam. The most was 182.9 mm (7.2 in) on 21 January 1935.
Record daily precipitation for each month at Cushman Dam
Month
Record daily precipitation (mm)
Date
Jan
182.9 mm (7.2 in)
21 January 1935
Feb
177.3 mm (7.0 in)
7 February 1945
Mar
156.7 mm (6.2 in)
19 March 1945
Apr
118.1 mm (4.6 in)
1 April 1915
May
66.0 mm (2.6 in)
16 May 1941
Jun
81.0 mm (3.2 in)
25 June 1931
Jul
83.3 mm (3.3 in)
16 July 1934
Aug
51.8 mm (2.0 in)
31 August 1941
Sep
104.1 mm (4.1 in)
19 September 1914
Oct
119.9 mm (4.7 in)
18 October 1914
Nov
174.8 mm (6.9 in)
3 November 1955
Dec
144.5 mm (5.7 in)
2 December 1941
Period of Record Coverage
1914 to 1973
Complete yearUnder 90 percent of days
54 years of record at Cushman Dam, 1914 to 1973. 12 years have data for under 90 percent of days and are left out of rankings: 1914, 1916, 1917, 1924, 1925, 1926, 1927, 1930 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 38 complete years at Cushman Dam, 1915 to 1971. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 1955, at 9.0 C (48.1 F), and the warmest was 1958, at 12.4 C (54.3 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Cushman Dam as warming stripes, 1915 to 1971
Year
Annual mean temperature
Difference from the station mean
1915
10.0 C
-0.44 C
1928
10.5 C
+0.14 C
1930
10.3 C
-0.14 C
1931
10.6 C
+0.16 C
1932
9.9 C
-0.51 C
1934
11.4 C
+0.97 C
1935
9.9 C
-0.54 C
1936
10.6 C
+0.24 C
1937
10.2 C
-0.24 C
1938
11.0 C
+0.63 C
1939
11.1 C
+0.71 C
1941
11.5 C
+1.08 C
1942
10.7 C
+0.32 C
1943
10.3 C
-0.10 C
1944
11.0 C
+0.56 C
1945
10.2 C
-0.23 C
1946
10.1 C
-0.32 C
1947
10.9 C
+0.46 C
1949
9.8 C
-0.59 C
1950
9.0 C
-1.35 C
1952
10.5 C
+0.15 C
1953
10.9 C
+0.54 C
1954
9.9 C
-0.48 C
1955
9.0 C
-1.43 C
1957
10.5 C
+0.09 C
1958
12.4 C
+1.99 C
1959
10.6 C
+0.23 C
1960
10.5 C
+0.06 C
1961
11.0 C
+0.59 C
1962
10.3 C
-0.14 C
1963
10.3 C
-0.05 C
1964
9.7 C
-0.67 C
1966
10.1 C
-0.29 C
1967
10.6 C
+0.16 C
1968
10.1 C
-0.34 C
1969
10.0 C
-0.38 C
1970
10.3 C
-0.09 C
1971
9.6 C
-0.75 C
The fitted trend in annual mean temperature here over 1915 to 1971 is -0.1 C (-0.2 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.4 to 0.2) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Cushman Dam
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.4 to 0.2) per decade
1915 to 1971
38
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.1 F (-0.5 to 0.2) per decade
1915 to 1971
38
Not clearly different from zero
Mean daily minimum
-0.05 C (-0.19 to 0.10) per decade
-0.1 F (-0.3 to 0.2) per decade
1915 to 1971
38
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
1914 to 1973
Yearly extremes at Cushman Dam: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1941
35.0 C (95.0 F)
54
Coldest night (TNn)
-18.9 C (-2.0 F)
1950
-8.6 C (16.5 F)
54
Wettest day (Rx1day)
182.9 mm (7.2 in)
1935
104.1 mm (4.1 in)
54
Wettest five days (Rx5day)
514.7 mm (20.3 in)
1935
237.3 mm (9.3 in)
53
Longest dry spell (CDD)
67 days
1928
32 days
53
Hottest day (TXx)
The hottest day of the year at Cushman Dam, 1914 to 1973. The record is 40.0 C (104.0 F) in 1941, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Cushman Dam by year
Year
Hottest day (TXx)
1914
33.3 C (91.9 F)
1915
35.0 C (95.0 F)
1916
34.4 C (93.9 F)
1917
8.9 C (48.0 F)
1924
18.3 C (64.9 F)
1925
36.1 C (97.0 F)
1926
25.6 C (78.1 F)
1927
22.2 C (72.0 F)
1928
36.1 C (97.0 F)
1929
35.6 C (96.1 F)
1930
33.9 C (93.0 F)
1931
34.4 C (93.9 F)
1932
32.8 C (91.0 F)
1933
36.1 C (97.0 F)
1934
35.0 C (95.0 F)
1935
38.3 C (100.9 F)
1936
34.4 C (93.9 F)
1937
35.0 C (95.0 F)
1938
36.7 C (98.1 F)
1939
35.6 C (96.1 F)
1940
33.3 C (91.9 F)
1941
40.0 C (104.0 F)
1942
38.3 C (100.9 F)
1943
32.8 C (91.0 F)
1944
37.8 C (100.0 F)
1945
34.4 C (93.9 F)
1946
36.7 C (98.1 F)
1947
33.3 C (91.9 F)
1948
35.0 C (95.0 F)
1949
32.8 C (91.0 F)
1950
33.3 C (91.9 F)
1951
35.6 C (96.1 F)
1952
36.1 C (97.0 F)
1953
35.0 C (95.0 F)
1954
29.4 C (84.9 F)
1955
35.6 C (96.1 F)
1956
38.3 C (100.9 F)
1957
31.7 C (89.1 F)
1958
38.3 C (100.9 F)
1959
37.2 C (99.0 F)
1960
36.7 C (98.1 F)
1961
37.8 C (100.0 F)
1962
33.9 C (93.0 F)
1963
32.8 C (91.0 F)
1964
32.2 C (90.0 F)
1965
37.8 C (100.0 F)
1966
31.7 C (89.1 F)
1967
36.7 C (98.1 F)
1968
35.0 C (95.0 F)
1969
33.9 C (93.0 F)
1970
35.6 C (96.1 F)
1971
36.7 C (98.1 F)
1972
33.9 C (93.0 F)
1973
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at Cushman Dam, 1914 to 1973. The record is -18.9 C (-2.0 F) in 1950, marked on the chart; the median year is -8.6 C (16.5 F).
Coldest night (TNn) at Cushman Dam by year
Year
Coldest night (TNn)
1914
-6.1 C (21.0 F)
1915
-4.4 C (24.1 F)
1916
-4.4 C (24.1 F)
1917
-7.8 C (18.0 F)
1924
-13.3 C (8.1 F)
1925
-6.7 C (19.9 F)
1926
-8.3 C (17.1 F)
1927
-10.6 C (12.9 F)
1928
-7.2 C (19.0 F)
1929
-8.9 C (16.0 F)
1930
-10.0 C (14.0 F)
1931
-4.4 C (24.1 F)
1932
-11.1 C (12.0 F)
1933
-13.9 C (7.0 F)
1934
-2.8 C (27.0 F)
1935
-14.4 C (6.1 F)
1936
-11.7 C (10.9 F)
1937
-12.2 C (10.0 F)
1938
-4.4 C (24.1 F)
1939
-5.0 C (23.0 F)
1940
-3.3 C (26.1 F)
1941
-6.1 C (21.0 F)
1942
-8.3 C (17.1 F)
1943
-16.1 C (3.0 F)
1944
-6.7 C (19.9 F)
1945
-6.1 C (21.0 F)
1946
-5.6 C (21.9 F)
1947
-12.2 C (10.0 F)
1948
-7.8 C (18.0 F)
1949
-11.7 C (10.9 F)
1950
-18.9 C (-2.0 F)
1951
-10.6 C (12.9 F)
1952
-11.1 C (12.0 F)
1953
-4.4 C (24.1 F)
1954
-8.9 C (16.0 F)
1955
-13.3 C (8.1 F)
1956
-10.6 C (12.9 F)
1957
-12.8 C (9.0 F)
1958
-6.1 C (21.0 F)
1959
-12.2 C (10.0 F)
1960
-5.0 C (23.0 F)
1961
-5.6 C (21.9 F)
1962
-11.1 C (12.0 F)
1963
-10.6 C (12.9 F)
1964
-12.8 C (9.0 F)
1965
-4.4 C (24.1 F)
1966
-5.6 C (21.9 F)
1967
-6.1 C (21.0 F)
1968
-13.9 C (7.0 F)
1969
-13.3 C (8.1 F)
1970
-5.0 C (23.0 F)
1971
-7.8 C (18.0 F)
1972
-13.3 C (8.1 F)
1973
-8.9 C (16.0 F)
Wettest day (Rx1day)
The wettest day of the year at Cushman Dam, 1914 to 1973. The record is 182.9 mm (7.2 in) in 1935, marked on the chart; the median year is 104.1 mm (4.1 in).
Wettest day (Rx1day) at Cushman Dam by year
Year
Wettest day (Rx1day)
1914
119.9 mm (4.7 in)
1915
118.1 mm (4.6 in)
1916
63.5 mm (2.5 in)
1917
6.4 mm (0.25 in)
1924
152.4 mm (6.0 in)
1925
83.1 mm (3.3 in)
1926
101.6 mm (4.0 in)
1927
78.2 mm (3.1 in)
1928
70.6 mm (2.8 in)
1929
104.1 mm (4.1 in)
1930
57.2 mm (2.3 in)
1931
165.4 mm (6.5 in)
1932
81.8 mm (3.2 in)
1933
136.7 mm (5.4 in)
1934
127.3 mm (5.0 in)
1935
182.9 mm (7.2 in)
1936
124.5 mm (4.9 in)
1937
143.5 mm (5.6 in)
1938
68.6 mm (2.7 in)
1939
144.3 mm (5.7 in)
1940
73.9 mm (2.9 in)
1941
144.5 mm (5.7 in)
1942
84.1 mm (3.3 in)
1943
100.8 mm (4.0 in)
1944
94.0 mm (3.7 in)
1945
177.3 mm (7.0 in)
1946
107.7 mm (4.2 in)
1947
97.8 mm (3.9 in)
1948
86.9 mm (3.4 in)
1949
152.9 mm (6.0 in)
1950
78.0 mm (3.1 in)
1951
101.6 mm (4.0 in)
1952
80.3 mm (3.2 in)
1953
83.8 mm (3.3 in)
1954
141.0 mm (5.6 in)
1955
174.8 mm (6.9 in)
1956
135.1 mm (5.3 in)
1957
112.8 mm (4.4 in)
1958
74.9 mm (2.9 in)
1959
163.6 mm (6.4 in)
1960
96.3 mm (3.8 in)
1961
151.9 mm (6.0 in)
1962
117.1 mm (4.6 in)
1963
104.1 mm (4.1 in)
1964
96.8 mm (3.8 in)
1965
68.3 mm (2.7 in)
1966
116.3 mm (4.6 in)
1967
102.6 mm (4.0 in)
1968
123.7 mm (4.9 in)
1969
108.0 mm (4.3 in)
1970
77.5 mm (3.1 in)
1971
108.0 mm (4.3 in)
1972
116.3 mm (4.6 in)
1973
63.0 mm (2.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Cushman Dam, 1914 to 1973. The record is 514.7 mm (20.3 in) in 1935, marked on the chart; the median year is 237.3 mm (9.3 in).
Wettest five days (Rx5day) at Cushman Dam by year
Year
Wettest five days (Rx5day)
1914
395.1 mm (15.6 in)
1915
262.2 mm (10.3 in)
1916
218.9 mm (8.6 in)
1917
n/a
1924
345.5 mm (13.6 in)
1925
222.3 mm (8.8 in)
1926
214.2 mm (8.4 in)
1927
221.3 mm (8.7 in)
1928
225.0 mm (8.9 in)
1929
180.2 mm (7.1 in)
1930
151.4 mm (6.0 in)
1931
310.1 mm (12.2 in)
1932
262.1 mm (10.3 in)
1933
422.6 mm (16.6 in)
1934
302.0 mm (11.9 in)
1935
514.7 mm (20.3 in)
1936
223.0 mm (8.8 in)
1937
336.3 mm (13.2 in)
1938
237.3 mm (9.3 in)
1939
344.0 mm (13.5 in)
1940
243.1 mm (9.6 in)
1941
254.8 mm (10.0 in)
1942
176.8 mm (7.0 in)
1943
195.5 mm (7.7 in)
1944
227.8 mm (9.0 in)
1945
308.7 mm (12.2 in)
1946
237.0 mm (9.3 in)
1947
310.7 mm (12.2 in)
1948
234.5 mm (9.2 in)
1949
290.8 mm (11.4 in)
1950
203.7 mm (8.0 in)
1951
295.0 mm (11.6 in)
1952
236.4 mm (9.3 in)
1953
240.0 mm (9.4 in)
1954
357.7 mm (14.1 in)
1955
322.4 mm (12.7 in)
1956
222.8 mm (8.8 in)
1957
332.9 mm (13.1 in)
1958
218.4 mm (8.6 in)
1959
348.8 mm (13.7 in)
1960
232.1 mm (9.1 in)
1961
265.6 mm (10.5 in)
1962
195.4 mm (7.7 in)
1963
279.3 mm (11.0 in)
1964
203.5 mm (8.0 in)
1965
197.0 mm (7.8 in)
1966
269.4 mm (10.6 in)
1967
220.4 mm (8.7 in)
1968
257.4 mm (10.1 in)
1969
242.1 mm (9.5 in)
1970
217.4 mm (8.6 in)
1971
209.3 mm (8.2 in)
1972
181.4 mm (7.1 in)
1973
90.1 mm (3.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Cushman Dam, 1914 to 1973. The record is 67 days in 1928, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Cushman Dam by year
Year
Longest dry spell (CDD)
1914
37 days
1915
32 days
1916
16 days
1917
n/a
1924
30 days
1925
33 days
1926
16 days
1927
37 days
1928
67 days
1929
25 days
1930
30 days
1931
42 days
1932
21 days
1933
27 days
1934
31 days
1935
40 days
1936
43 days
1937
37 days
1938
21 days
1939
36 days
1940
36 days
1941
24 days
1942
41 days
1943
37 days
1944
45 days
1945
41 days
1946
45 days
1947
21 days
1948
17 days
1949
20 days
1950
29 days
1951
52 days
1952
41 days
1953
24 days
1954
36 days
1955
42 days
1956
26 days
1957
14 days
1958
34 days
1959
41 days
1960
56 days
1961
40 days
1962
28 days
1963
26 days
1964
20 days
1965
21 days
1966
54 days
1967
43 days
1968
29 days
1969
23 days
1970
20 days
1971
32 days
1972
32 days
1973
13 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
38 years with a frost
Across 38 years with a frost, the median last spring frost at Cushman Dam falls on 26 April and the median first autumn frost on 5 November, which leaves a median of 198 days between them.
Fitted over all years, the growing season changes by -3.3 days per decade at this station.
Frost dates and growing season at Cushman Dam
Measure
Median, all years
Earliest period
Recent period (1937 to 1971)
Recent against earliest
Fitted trend
Last spring frost
26 April
n/a
27 April
n/a
+2.4 days per decade
First autumn frost
5 November
n/a
4 November
n/a
-1.0 days per decade
Growing days
198 days
n/a
194 days
n/a
-3.3 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
49 years, 1915 to 1971
A day with at least 107.4 mm (4.2 in) of rain is expected about once in 2 years. A day with at least 209.9 mm (8.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Cushman Dam: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
107.4 mm (4.2 in)
5 years
137.7 mm (5.4 in)
10 years
156.6 mm (6.2 in)
25 years
179.1 mm (7.1 in)
50 years
194.9 mm (7.7 in)
Longer than the 49 years of record
100 years
209.9 mm (8.3 in)
Longer than the 49 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, 49 years of values from 1915 to 1971.
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: 182.9 mm (7.2 in) in 1935; 177.3 mm (7.0 in) in 1945; 174.8 mm (6.9 in) in 1955.
Download the Data
Data for Cushman Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cushman Dam 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.