Record envelope, standing records and threshold days for Lake Cle Elum (USC00454394), Washington, United States, with 70 years of record.
Key Facts for Lake Cle Elum
Lake Cle Elum (USC00454394) is a weather station in Washington, United States at 47.25 latitude and -121.07 longitude, 689 m (2,260 ft) above sea level.
The station reports from 1908 to 1977, 70 years of record.
1,464 records set at Lake Cle Elum still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lake Cle Elum tied a daily record low maximum temperature of 12.8 C (55.0 F) on 30 August 1977.
About the Station
Location: Washington, United States, 47.25 latitude, -121.07 longitude.
Elevation: 689 m (2,260 ft).
Period of record: 1908 to 1977, 70 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 Lake Cle Elum. 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 Lake Cle Elum, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.3 C (55.9 F)
-32.2 C (-26.0 F)
n/a
n/a
Feb
16.1 C (61.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Mar
22.8 C (73.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-12.8 C (9.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
40.6 C (105.1 F)
0.0 C (32.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
36.1 C (97.0 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lake Cle Elum still stand. 1934 holds the most, with 53.
Standing records at Lake Cle Elum by the year they were set
Year set
Standing records
1913
25
1914
18
1915
17
1916
33
1917
36
1918
28
1919
17
1920
25
1921
26
1922
28
1923
14
1924
30
1925
23
1926
32
1927
25
1928
18
1929
32
1930
25
1931
22
1932
16
1933
29
1934
53
1935
34
1936
33
1937
13
1938
19
1939
32
1940
20
1941
26
1942
25
1943
17
1944
28
1945
27
1946
10
1947
20
1948
20
1949
28
1950
36
1951
12
1952
19
1953
13
1954
13
1955
47
1956
25
1957
22
1958
24
1959
9
1960
18
1961
15
1962
19
1963
29
1964
12
1965
14
1966
12
1967
14
1968
27
1969
24
1970
15
1971
21
1972
34
1973
15
1974
18
1975
14
1976
10
1977
9
All-Time Record Progression
7 new records
7 all-time records were set at Lake Cle Elum between 16 January 1950 and 30 December 1968. Each dot is a new record.
When Lake Cle Elum set new all-time records
Date
Kind
Detail
1950-01-16
Record low maximum temperature
Record low maximum temperature -17.8 C (0.0 F)
1950-01-18
Record low maximum temperature
Record low maximum temperature -18.3 C (-0.9 F)
1950-01-25
Record low minimum temperature
Record low minimum temperature -28.9 C (-20.0 F)
1950-01-30
Record low minimum temperature
Record low minimum temperature -30.0 C (-22.0 F)
1950-01-31
Record low minimum temperature
Record low minimum temperature -32.2 C (-26.0 F)
1950-02-03
Record low minimum temperature
Record low minimum temperature -33.3 C (-27.9 F)
1968-12-30
Record low maximum temperature
Record low maximum temperature -20.0 C (-4.0 F)
Wettest Day of Each Month
Dec: 180.3 mm (7.1 in)
The wettest day on record for each calendar month at Lake Cle Elum. The most was 180.3 mm (7.1 in) on 17 December 1917.
Record daily precipitation for each month at Lake Cle Elum
Month
Record daily precipitation (mm)
Date
Jan
98.8 mm (3.9 in)
22 January 1935
Feb
72.6 mm (2.9 in)
8 February 1955
Mar
54.4 mm (2.1 in)
27 March 1936
Apr
55.9 mm (2.2 in)
7 April 1962
May
46.2 mm (1.8 in)
28 May 1948
Jun
27.2 mm (1.1 in)
22 June 1938
Jul
26.4 mm (1.0 in)
19 July 1941
Aug
44.2 mm (1.7 in)
29 August 1920
Sep
47.5 mm (1.9 in)
28 September 1927
Oct
96.8 mm (3.8 in)
25 October 1934
Nov
82.3 mm (3.2 in)
30 November 1921
Dec
180.3 mm (7.1 in)
17 December 1917
Period of Record Coverage
1913 to 1977
Complete yearUnder 90 percent of days
65 years of record at Lake Cle Elum, 1913 to 1977. 5 years have data for under 90 percent of days and are left out of rankings: 1919, 1922, 1924, 1972, 1977.
Cooler than the station meanWarmer than the station mean
One stripe for each of 57 complete years at Lake Cle Elum, 1913 to 1976. Blue stripes are years cooler than the station's own mean of 7.2 C (45.0 F); red stripes are warmer. The coolest year was 1916, at 4.9 C (40.8 F), and the warmest was 1934, at 9.4 C (48.8 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Lake Cle Elum as warming stripes, 1913 to 1976
Year
Annual mean temperature
Difference from the station mean
1913
6.7 C
-0.51 C
1914
7.7 C
+0.40 C
1915
7.9 C
+0.61 C
1916
4.9 C
-2.37 C
1917
7.1 C
-0.11 C
1918
7.2 C
-0.01 C
1920
7.3 C
+0.09 C
1921
7.6 C
+0.36 C
1923
7.7 C
+0.42 C
1925
8.6 C
+1.36 C
1926
8.5 C
+1.26 C
1927
7.1 C
-0.16 C
1928
7.7 C
+0.44 C
1929
7.0 C
-0.24 C
1930
7.1 C
-0.19 C
1931
7.5 C
+0.26 C
1932
7.0 C
-0.26 C
1933
7.1 C
-0.11 C
1934
9.4 C
+2.10 C
1935
7.1 C
-0.17 C
1936
7.4 C
+0.11 C
1937
6.9 C
-0.33 C
1938
8.1 C
+0.84 C
1939
8.4 C
+1.15 C
1940
8.6 C
+1.31 C
1941
8.5 C
+1.28 C
1942
7.7 C
+0.41 C
1943
6.9 C
-0.40 C
1944
7.3 C
+0.01 C
1945
7.5 C
+0.25 C
1946
7.4 C
+0.11 C
1947
8.1 C
+0.83 C
1948
6.3 C
-0.91 C
1949
6.6 C
-0.61 C
1950
6.0 C
-1.28 C
1951
7.2 C
-0.05 C
1952
6.9 C
-0.36 C
1953
7.6 C
+0.34 C
1954
6.4 C
-0.90 C
1955
5.5 C
-1.78 C
1956
6.3 C
-0.97 C
1957
6.6 C
-0.69 C
1958
8.5 C
+1.25 C
1959
6.7 C
-0.59 C
1960
6.6 C
-0.62 C
1961
7.2 C
-0.08 C
1962
6.9 C
-0.37 C
1963
7.3 C
+0.01 C
1964
6.1 C
-1.14 C
1965
7.5 C
+0.23 C
1966
7.5 C
+0.22 C
1967
8.4 C
+1.11 C
1968
7.1 C
-0.18 C
1969
6.6 C
-0.61 C
1970
6.7 C
-0.55 C
1974
7.3 C
+0.08 C
1976
6.7 C
-0.53 C
The fitted trend in annual mean temperature here over 1913 to 1976 is -0.09 C (-0.21 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.4 to 0.1) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lake Cle Elum
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.09 C (-0.21 to 0.03) per decade
-0.2 F (-0.4 to 0.1) per decade
1913 to 1976
57
Not clearly different from zero
Mean daily maximum
-0.18 C (-0.32 to -0.04) per decade
-0.3 F (-0.6 to -0.1) per decade
1913 to 1976
57
Fall
Mean daily minimum
0.00 C (-0.13 to 0.12) per decade
0.00 F (-0.23 to 0.22) per decade
1913 to 1976
57
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
1908 to 1977
Yearly extremes at Lake Cle Elum: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1935
36.1 C (97.0 F)
65
Coldest night (TNn)
-33.3 C (-27.9 F)
1950
-20.6 C (-5.1 F)
65
Wettest day (Rx1day)
180.3 mm (7.1 in)
1917
50.2 mm (2.0 in)
70
Wettest five days (Rx5day)
333.0 mm (13.1 in)
1917
107.8 mm (4.2 in)
70
Longest dry spell (CDD)
104 days
1916
35 days
70
Hottest day (TXx)
The hottest day of the year at Lake Cle Elum, 1908 to 1977. The record is 40.6 C (105.1 F) in 1935, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Lake Cle Elum by year
Year
Hottest day (TXx)
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
37.2 C (99.0 F)
1914
36.1 C (97.0 F)
1915
37.8 C (100.0 F)
1916
29.4 C (84.9 F)
1917
33.3 C (91.9 F)
1918
33.9 C (93.0 F)
1919
33.9 C (93.0 F)
1920
36.1 C (97.0 F)
1921
37.8 C (100.0 F)
1922
37.8 C (100.0 F)
1923
35.0 C (95.0 F)
1924
36.1 C (97.0 F)
1925
36.7 C (98.1 F)
1926
39.4 C (102.9 F)
1927
38.3 C (100.9 F)
1928
39.4 C (102.9 F)
1929
36.7 C (98.1 F)
1930
37.8 C (100.0 F)
1931
37.2 C (99.0 F)
1932
35.0 C (95.0 F)
1933
36.7 C (98.1 F)
1934
36.1 C (97.0 F)
1935
40.6 C (105.1 F)
1936
33.9 C (93.0 F)
1937
35.6 C (96.1 F)
1938
38.9 C (102.0 F)
1939
40.6 C (105.1 F)
1940
35.6 C (96.1 F)
1941
40.0 C (104.0 F)
1942
38.3 C (100.9 F)
1943
33.9 C (93.0 F)
1944
36.1 C (97.0 F)
1945
35.6 C (96.1 F)
1946
36.7 C (98.1 F)
1947
33.9 C (93.0 F)
1948
33.3 C (91.9 F)
1949
33.9 C (93.0 F)
1950
35.6 C (96.1 F)
1951
33.9 C (93.0 F)
1952
36.7 C (98.1 F)
1953
35.0 C (95.0 F)
1954
32.8 C (91.0 F)
1955
35.0 C (95.0 F)
1956
37.2 C (99.0 F)
1957
32.8 C (91.0 F)
1958
36.7 C (98.1 F)
1959
36.1 C (97.0 F)
1960
38.3 C (100.9 F)
1961
36.7 C (98.1 F)
1962
34.4 C (93.9 F)
1963
35.0 C (95.0 F)
1964
34.4 C (93.9 F)
1965
37.2 C (99.0 F)
1966
35.6 C (96.1 F)
1967
36.1 C (97.0 F)
1968
37.2 C (99.0 F)
1969
34.4 C (93.9 F)
1970
37.8 C (100.0 F)
1971
38.9 C (102.0 F)
1972
36.7 C (98.1 F)
1973
34.4 C (93.9 F)
1974
36.1 C (97.0 F)
1975
36.7 C (98.1 F)
1976
30.6 C (87.1 F)
1977
36.1 C (97.0 F)
Coldest night (TNn)
The coldest night of the year at Lake Cle Elum, 1908 to 1977. The record is -33.3 C (-27.9 F) in 1950, marked on the chart; the median year is -20.6 C (-5.1 F).
Coldest night (TNn) at Lake Cle Elum by year
Year
Coldest night (TNn)
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
-19.4 C (-2.9 F)
1914
-16.7 C (1.9 F)
1915
-20.6 C (-5.1 F)
1916
-20.6 C (-5.1 F)
1917
-20.6 C (-5.1 F)
1918
-23.3 C (-9.9 F)
1919
-17.8 C (0.0 F)
1920
-15.0 C (5.0 F)
1921
-15.6 C (3.9 F)
1922
-23.9 C (-11.0 F)
1923
-20.0 C (-4.0 F)
1924
-21.7 C (-7.1 F)
1925
-13.3 C (8.1 F)
1926
-23.3 C (-9.9 F)
1927
-25.6 C (-14.1 F)
1928
-17.8 C (0.0 F)
1929
-25.6 C (-14.1 F)
1930
-25.0 C (-13.0 F)
1931
-15.6 C (3.9 F)
1932
-21.1 C (-6.0 F)
1933
-28.3 C (-18.9 F)
1934
-11.7 C (10.9 F)
1935
-26.7 C (-16.1 F)
1936
-26.1 C (-15.0 F)
1937
-26.1 C (-15.0 F)
1938
-13.3 C (8.1 F)
1939
-18.3 C (-0.9 F)
1940
-15.6 C (3.9 F)
1941
-11.1 C (12.0 F)
1942
-20.0 C (-4.0 F)
1943
-27.8 C (-18.0 F)
1944
-17.8 C (0.0 F)
1945
-15.0 C (5.0 F)
1946
-16.7 C (1.9 F)
1947
-17.8 C (0.0 F)
1948
-20.0 C (-4.0 F)
1949
-26.1 C (-15.0 F)
1950
-33.3 C (-27.9 F)
1951
-23.3 C (-9.9 F)
1952
-22.8 C (-9.0 F)
1953
-10.0 C (14.0 F)
1954
-23.9 C (-11.0 F)
1955
-23.9 C (-11.0 F)
1956
-29.4 C (-20.9 F)
1957
-30.0 C (-22.0 F)
1958
-17.2 C (1.0 F)
1959
-23.3 C (-9.9 F)
1960
-18.3 C (-0.9 F)
1961
-16.7 C (1.9 F)
1962
-24.4 C (-11.9 F)
1963
-23.9 C (-11.0 F)
1964
-30.0 C (-22.0 F)
1965
-15.0 C (5.0 F)
1966
-15.6 C (3.9 F)
1967
-15.6 C (3.9 F)
1968
-33.3 C (-27.9 F)
1969
-27.2 C (-17.0 F)
1970
-17.2 C (1.0 F)
1971
-17.2 C (1.0 F)
1972
-24.4 C (-11.9 F)
1973
-21.1 C (-6.0 F)
1974
-26.7 C (-16.1 F)
1975
-13.3 C (8.1 F)
1976
-16.7 C (1.9 F)
1977
-16.7 C (1.9 F)
Wettest day (Rx1day)
The wettest day of the year at Lake Cle Elum, 1908 to 1977. The record is 180.3 mm (7.1 in) in 1917, marked on the chart; the median year is 50.2 mm (2.0 in).
Wettest day (Rx1day) at Lake Cle Elum by year
Year
Wettest day (Rx1day)
1908
35.6 mm (1.4 in)
1909
51.6 mm (2.0 in)
1910
86.9 mm (3.4 in)
1911
41.7 mm (1.6 in)
1912
36.1 mm (1.4 in)
1913
33.0 mm (1.3 in)
1914
38.1 mm (1.5 in)
1915
40.9 mm (1.6 in)
1916
66.0 mm (2.6 in)
1917
180.3 mm (7.1 in)
1918
62.2 mm (2.4 in)
1919
48.8 mm (1.9 in)
1920
44.2 mm (1.7 in)
1921
82.3 mm (3.2 in)
1922
27.9 mm (1.1 in)
1923
62.0 mm (2.4 in)
1924
28.2 mm (1.1 in)
1925
38.1 mm (1.5 in)
1926
50.8 mm (2.0 in)
1927
61.5 mm (2.4 in)
1928
37.3 mm (1.5 in)
1929
33.8 mm (1.3 in)
1930
40.9 mm (1.6 in)
1931
45.7 mm (1.8 in)
1932
46.2 mm (1.8 in)
1933
101.1 mm (4.0 in)
1934
96.8 mm (3.8 in)
1935
98.8 mm (3.9 in)
1936
54.4 mm (2.1 in)
1937
43.7 mm (1.7 in)
1938
43.9 mm (1.7 in)
1939
46.2 mm (1.8 in)
1940
56.1 mm (2.2 in)
1941
53.6 mm (2.1 in)
1942
64.5 mm (2.5 in)
1943
62.7 mm (2.5 in)
1944
36.8 mm (1.4 in)
1945
65.3 mm (2.6 in)
1946
98.6 mm (3.9 in)
1947
37.8 mm (1.5 in)
1948
54.4 mm (2.1 in)
1949
53.1 mm (2.1 in)
1950
51.6 mm (2.0 in)
1951
52.8 mm (2.1 in)
1952
43.2 mm (1.7 in)
1953
66.5 mm (2.6 in)
1954
39.6 mm (1.6 in)
1955
72.6 mm (2.9 in)
1956
46.0 mm (1.8 in)
1957
43.7 mm (1.7 in)
1958
73.7 mm (2.9 in)
1959
57.7 mm (2.3 in)
1960
44.7 mm (1.8 in)
1961
48.3 mm (1.9 in)
1962
75.4 mm (3.0 in)
1963
69.9 mm (2.8 in)
1964
82.6 mm (3.3 in)
1965
72.1 mm (2.8 in)
1966
34.3 mm (1.4 in)
1967
41.9 mm (1.6 in)
1968
42.9 mm (1.7 in)
1969
50.8 mm (2.0 in)
1970
49.5 mm (1.9 in)
1971
42.2 mm (1.7 in)
1972
70.6 mm (2.8 in)
1973
38.1 mm (1.5 in)
1974
52.8 mm (2.1 in)
1975
71.1 mm (2.8 in)
1976
37.6 mm (1.5 in)
1977
40.4 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lake Cle Elum, 1908 to 1977. The record is 333.0 mm (13.1 in) in 1917, marked on the chart; the median year is 107.8 mm (4.2 in).
Wettest five days (Rx5day) at Lake Cle Elum by year
Year
Wettest five days (Rx5day)
1908
45.8 mm (1.8 in)
1909
103.7 mm (4.1 in)
1910
138.4 mm (5.4 in)
1911
111.5 mm (4.4 in)
1912
91.4 mm (3.6 in)
1913
98.0 mm (3.9 in)
1914
94.8 mm (3.7 in)
1915
104.1 mm (4.1 in)
1916
96.4 mm (3.8 in)
1917
333.0 mm (13.1 in)
1918
119.5 mm (4.7 in)
1919
117.4 mm (4.6 in)
1920
80.5 mm (3.2 in)
1921
134.6 mm (5.3 in)
1922
42.8 mm (1.7 in)
1923
180.4 mm (7.1 in)
1924
77.5 mm (3.1 in)
1925
70.6 mm (2.8 in)
1926
77.6 mm (3.1 in)
1927
119.1 mm (4.7 in)
1928
81.2 mm (3.2 in)
1929
70.3 mm (2.8 in)
1930
117.2 mm (4.6 in)
1931
101.1 mm (4.0 in)
1932
119.2 mm (4.7 in)
1933
253.5 mm (10.0 in)
1934
168.5 mm (6.6 in)
1935
175.0 mm (6.9 in)
1936
128.3 mm (5.1 in)
1937
128.9 mm (5.1 in)
1938
86.9 mm (3.4 in)
1939
98.3 mm (3.9 in)
1940
92.7 mm (3.6 in)
1941
90.4 mm (3.6 in)
1942
151.1 mm (5.9 in)
1943
90.5 mm (3.6 in)
1944
69.0 mm (2.7 in)
1945
105.4 mm (4.1 in)
1946
207.0 mm (8.1 in)
1947
117.8 mm (4.6 in)
1948
110.2 mm (4.3 in)
1949
142.8 mm (5.6 in)
1950
119.6 mm (4.7 in)
1951
102.9 mm (4.1 in)
1952
62.1 mm (2.4 in)
1953
145.1 mm (5.7 in)
1954
103.9 mm (4.1 in)
1955
124.4 mm (4.9 in)
1956
85.7 mm (3.4 in)
1957
66.6 mm (2.6 in)
1958
127.8 mm (5.0 in)
1959
155.5 mm (6.1 in)
1960
94.2 mm (3.7 in)
1961
121.4 mm (4.8 in)
1962
129.0 mm (5.1 in)
1963
101.7 mm (4.0 in)
1964
121.0 mm (4.8 in)
1965
256.9 mm (10.1 in)
1966
80.3 mm (3.2 in)
1967
104.4 mm (4.1 in)
1968
104.4 mm (4.1 in)
1969
141.0 mm (5.6 in)
1970
86.1 mm (3.4 in)
1971
135.9 mm (5.4 in)
1972
132.0 mm (5.2 in)
1973
102.6 mm (4.0 in)
1974
127.0 mm (5.0 in)
1975
213.1 mm (8.4 in)
1976
119.7 mm (4.7 in)
1977
57.7 mm (2.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lake Cle Elum, 1908 to 1977. The record is 104 days in 1916, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Lake Cle Elum by year
Year
Longest dry spell (CDD)
1908
15 days
1909
71 days
1910
73 days
1911
26 days
1912
30 days
1913
25 days
1914
85 days
1915
62 days
1916
104 days
1917
42 days
1918
21 days
1919
55 days
1920
40 days
1921
45 days
1922
66 days
1923
39 days
1924
35 days
1925
68 days
1926
62 days
1927
33 days
1928
26 days
1929
93 days
1930
31 days
1931
68 days
1932
40 days
1933
33 days
1934
39 days
1935
19 days
1936
16 days
1937
22 days
1938
12 days
1939
6 days
1940
13 days
1941
28 days
1942
41 days
1943
65 days
1944
55 days
1945
62 days
1946
27 days
1947
32 days
1948
17 days
1949
53 days
1950
32 days
1951
83 days
1952
47 days
1953
21 days
1954
34 days
1955
58 days
1956
53 days
1957
31 days
1958
31 days
1959
24 days
1960
35 days
1961
28 days
1962
19 days
1963
29 days
1964
21 days
1965
38 days
1966
28 days
1967
71 days
1968
32 days
1969
39 days
1970
29 days
1971
43 days
1972
33 days
1973
60 days
1974
71 days
1975
36 days
1976
25 days
1977
26 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
57 years with a frost
Across 57 years with a frost, the median last spring frost at Lake Cle Elum falls on 21 May and the median first autumn frost on 21 September, which leaves a median of 121 days between them.
Fitted over all years, the growing season changes by -0.6 days per decade at this station.
Frost dates and growing season at Lake Cle Elum
Measure
Median, all years
Earliest period
Recent period (1943 to 1976)
Recent against earliest
Fitted trend
Last spring frost
21 May
n/a
15 May
n/a
-1.3 days per decade
First autumn frost
21 September
n/a
18 September
n/a
-2.0 days per decade
Growing days
121 days
n/a
121 days
n/a
-0.6 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
59 years, 1909 to 1976
A day with at least 51.4 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 148.1 mm (5.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Lake Cle Elum: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.4 mm (2.0 in)
5 years
69.1 mm (2.7 in)
10 years
83.6 mm (3.3 in)
25 years
105.7 mm (4.2 in)
50 years
125.3 mm (4.9 in)
100 years
148.1 mm (5.8 in)
Longer than the 59 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, 59 years of values from 1909 to 1976.
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: 180.3 mm (7.1 in) in 1917; 101.1 mm (4.0 in) in 1933; 98.6 mm (3.9 in) in 1946.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Lake Cle Elum, at 1952. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1952 ran 0.3 C (0.5 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Lake Cle Elum, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1952
-0.3
-0.5
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Lake Cle Elum standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lake Cle Elum 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.