Record envelope, standing records and threshold days for Lake Keechelus (USC00454414), Washington, United States, with 71 years of record.
Key Facts for Lake Keechelus
Lake Keechelus (USC00454414) is a weather station in Washington, United States at 47.32 latitude and -121.33 longitude, 756 m (2,480 ft) above sea level.
The station reports from 1907 to 1977, 71 years of record.
1,464 records set at Lake Keechelus still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lake Keechelus tied a monthly record low minimum temperature of -1.1 C (30.0 F) on 31 August 1977.
About the Station
Location: Washington, United States, 47.32 latitude, -121.33 longitude.
Elevation: 756 m (2,480 ft).
Period of record: 1907 to 1977, 71 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 Keechelus. 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 Keechelus, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Feb
17.2 C (63.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-15.6 C (3.9 F)
n/a
n/a
May
32.2 C (90.0 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
36.1 C (97.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
33.3 C (91.9 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
17.2 C (63.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lake Keechelus still stand. 1926 holds the most, with 45.
Standing records at Lake Keechelus by the year they were set
Year set
Standing records
1913
9
1914
14
1915
19
1916
23
1917
36
1918
23
1919
31
1920
20
1921
16
1922
26
1923
10
1924
35
1925
21
1926
45
1927
32
1928
21
1929
28
1930
26
1931
34
1932
20
1933
37
1934
45
1935
39
1936
31
1937
20
1938
16
1939
25
1940
22
1941
27
1942
21
1943
7
1944
21
1945
20
1946
6
1947
12
1948
15
1949
30
1950
36
1951
12
1952
25
1953
19
1954
21
1955
44
1956
23
1957
18
1958
33
1959
11
1960
15
1961
13
1962
24
1963
25
1964
19
1965
16
1966
9
1967
13
1968
22
1969
26
1970
10
1971
26
1972
21
1973
18
1974
20
1975
22
1976
25
1977
15
All-Time Record Progression
7 new records
7 all-time records were set at Lake Keechelus between 14 January 1950 and 31 December 1968. Each dot is a new record.
When Lake Keechelus set new all-time records
Date
Kind
Detail
1950-01-14
Record low maximum temperature
Record low maximum temperature -17.2 C (1.0 F)
1950-01-16
Record low maximum temperature
Record low maximum temperature -17.8 C (0.0 F)
1950-01-25
Record low minimum temperature
Record low minimum temperature -31.1 C (-24.0 F)
1950-01-26
Record low minimum temperature
Record low minimum temperature -31.7 C (-25.1 F)
1950-01-31
Record low minimum temperature
Record low minimum temperature -33.3 C (-27.9 F)
1964-12-17
Record low maximum temperature
Record low maximum temperature -18.9 C (-2.0 F)
1968-12-31
Record low maximum temperature
Record low maximum temperature -20.6 C (-5.1 F)
Wettest Day of Each Month
Jul: 152.4 mm (6.0 in)
The wettest day on record for each calendar month at Lake Keechelus. The most was 152.4 mm (6.0 in) on 4 July 1907.
Record daily precipitation for each month at Lake Keechelus
Month
Record daily precipitation (mm)
Date
Jan
130.6 mm (5.1 in)
22 January 1935
Feb
113.8 mm (4.5 in)
26 February 1932
Mar
78.7 mm (3.1 in)
27 March 1936
Apr
56.9 mm (2.2 in)
18 April 1938
May
44.2 mm (1.7 in)
28 May 1948
Jun
43.2 mm (1.7 in)
5 June 1974
Jul
152.4 mm (6.0 in)
4 July 1907
Aug
54.6 mm (2.1 in)
7 August 1907
Sep
51.6 mm (2.0 in)
5 September 1959
Oct
135.9 mm (5.4 in)
25 October 1934
Nov
114.0 mm (4.5 in)
23 November 1959
Dec
134.6 mm (5.3 in)
10 December 1956
Period of Record Coverage
1913 to 1977
Complete yearUnder 90 percent of days
65 years of record at Lake Keechelus, 1913 to 1977. 5 years have data for under 90 percent of days and are left out of rankings: 1913, 1919, 1969, 1972, 1977.
Cooler than the station meanWarmer than the station mean
One stripe for each of 58 complete years at Lake Keechelus, 1914 to 1976. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1955, at 4.2 C (39.6 F), and the warmest was 1934, at 8.3 C (46.9 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Lake Keechelus as warming stripes, 1914 to 1976
Year
Annual mean temperature
Difference from the station mean
1914
6.8 C
+0.84 C
1915
7.1 C
+1.12 C
1916
5.0 C
-0.98 C
1917
6.4 C
+0.47 C
1918
7.0 C
+0.99 C
1920
5.7 C
-0.28 C
1921
5.8 C
-0.22 C
1922
4.9 C
-1.08 C
1923
6.1 C
+0.08 C
1924
5.9 C
-0.07 C
1925
7.0 C
+1.01 C
1926
7.2 C
+1.20 C
1927
5.4 C
-0.62 C
1928
6.3 C
+0.30 C
1929
5.3 C
-0.66 C
1930
5.5 C
-0.43 C
1931
6.8 C
+0.86 C
1932
6.0 C
+0.05 C
1933
5.9 C
-0.05 C
1934
8.3 C
+2.33 C
1935
6.1 C
+0.11 C
1936
6.1 C
+0.08 C
1937
5.8 C
-0.20 C
1938
6.9 C
+0.88 C
1939
6.8 C
+0.87 C
1940
7.1 C
+1.15 C
1941
7.3 C
+1.33 C
1942
6.0 C
-0.01 C
1943
5.2 C
-0.81 C
1944
5.6 C
-0.37 C
1945
5.6 C
-0.35 C
1946
5.4 C
-0.61 C
1947
6.4 C
+0.44 C
1948
4.8 C
-1.21 C
1949
5.3 C
-0.72 C
1950
4.9 C
-1.12 C
1951
5.7 C
-0.31 C
1952
5.9 C
-0.09 C
1953
6.6 C
+0.62 C
1954
5.0 C
-0.99 C
1955
4.2 C
-1.76 C
1956
5.1 C
-0.85 C
1957
5.7 C
-0.32 C
1958
7.6 C
+1.67 C
1959
5.7 C
-0.31 C
1960
5.5 C
-0.44 C
1961
6.3 C
+0.29 C
1962
5.9 C
-0.06 C
1963
6.3 C
+0.34 C
1964
4.9 C
-1.11 C
1965
6.2 C
+0.25 C
1966
6.2 C
+0.18 C
1967
6.7 C
+0.76 C
1968
5.8 C
-0.16 C
1970
5.6 C
-0.41 C
1973
5.9 C
-0.10 C
1974
5.4 C
-0.55 C
1976
5.2 C
-0.77 C
The fitted trend in annual mean temperature here over 1914 to 1976 is -0.11 C (-0.23 to 0.01) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.20 F (-0.42 to 0.01) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lake Keechelus
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.11 C (-0.23 to 0.01) per decade
-0.20 F (-0.42 to 0.01) per decade
1914 to 1976
58
Not clearly different from zero
Mean daily maximum
-0.18 C (-0.33 to -0.04) per decade
-0.3 F (-0.6 to -0.1) per decade
1914 to 1976
58
Fall
Mean daily minimum
-0.04 C (-0.16 to 0.08) per decade
-0.1 F (-0.3 to 0.1) per decade
1914 to 1976
58
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
1907 to 1977
Yearly extremes at Lake Keechelus: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
1935
33.3 C (91.9 F)
65
Coldest night (TNn)
-33.3 C (-27.9 F)
1950
-20.6 C (-5.1 F)
65
Wettest day (Rx1day)
152.4 mm (6.0 in)
1907
73.7 mm (2.9 in)
71
Wettest five days (Rx5day)
338.7 mm (13.3 in)
1933
167.4 mm (6.6 in)
71
Longest dry spell (CDD)
75 days
1922
30 days
71
Hottest day (TXx)
The hottest day of the year at Lake Keechelus, 1907 to 1977. The record is 38.9 C (102.0 F) in 1935, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Lake Keechelus by year
Year
Hottest day (TXx)
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
35.0 C (95.0 F)
1914
33.3 C (91.9 F)
1915
35.0 C (95.0 F)
1916
35.0 C (95.0 F)
1917
33.3 C (91.9 F)
1918
32.8 C (91.0 F)
1919
33.3 C (91.9 F)
1920
33.3 C (91.9 F)
1921
32.8 C (91.0 F)
1922
33.3 C (91.9 F)
1923
33.3 C (91.9 F)
1924
35.0 C (95.0 F)
1925
35.0 C (95.0 F)
1926
35.6 C (96.1 F)
1927
31.1 C (88.0 F)
1928
36.1 C (97.0 F)
1929
31.7 C (89.1 F)
1930
33.3 C (91.9 F)
1931
37.2 C (99.0 F)
1932
32.8 C (91.0 F)
1933
36.1 C (97.0 F)
1934
35.6 C (96.1 F)
1935
38.9 C (102.0 F)
1936
32.2 C (90.0 F)
1937
33.3 C (91.9 F)
1938
38.9 C (102.0 F)
1939
37.8 C (100.0 F)
1940
34.4 C (93.9 F)
1941
38.9 C (102.0 F)
1942
35.6 C (96.1 F)
1943
29.4 C (84.9 F)
1944
33.9 C (93.0 F)
1945
33.9 C (93.0 F)
1946
33.9 C (93.0 F)
1947
31.1 C (88.0 F)
1948
31.1 C (88.0 F)
1949
30.6 C (87.1 F)
1950
33.3 C (91.9 F)
1951
31.7 C (89.1 F)
1952
32.8 C (91.0 F)
1953
32.8 C (91.0 F)
1954
28.3 C (82.9 F)
1955
32.8 C (91.0 F)
1956
35.0 C (95.0 F)
1957
31.1 C (88.0 F)
1958
35.6 C (96.1 F)
1959
32.2 C (90.0 F)
1960
33.9 C (93.0 F)
1961
35.0 C (95.0 F)
1962
29.4 C (84.9 F)
1963
33.9 C (93.0 F)
1964
31.7 C (89.1 F)
1965
35.0 C (95.0 F)
1966
31.7 C (89.1 F)
1967
34.4 C (93.9 F)
1968
33.9 C (93.0 F)
1969
32.2 C (90.0 F)
1970
33.9 C (93.0 F)
1971
35.6 C (96.1 F)
1972
33.3 C (91.9 F)
1973
33.9 C (93.0 F)
1974
33.3 C (91.9 F)
1975
35.6 C (96.1 F)
1976
31.1 C (88.0 F)
1977
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Lake Keechelus, 1907 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 Keechelus by year
Year
Coldest night (TNn)
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
-6.7 C (19.9 F)
1914
-17.2 C (1.0 F)
1915
-20.6 C (-5.1 F)
1916
-23.3 C (-9.9 F)
1917
-21.7 C (-7.1 F)
1918
-19.4 C (-2.9 F)
1919
-27.8 C (-18.0 F)
1920
-17.2 C (1.0 F)
1921
-17.8 C (0.0 F)
1922
-28.9 C (-20.0 F)
1923
-25.0 C (-13.0 F)
1924
-25.0 C (-13.0 F)
1925
-13.9 C (7.0 F)
1926
-20.6 C (-5.1 F)
1927
-26.1 C (-15.0 F)
1928
-16.1 C (3.0 F)
1929
-27.2 C (-17.0 F)
1930
-24.4 C (-11.9 F)
1931
-16.1 C (3.0 F)
1932
-21.7 C (-7.1 F)
1933
-28.3 C (-18.9 F)
1934
-9.4 C (15.1 F)
1935
-24.4 C (-11.9 F)
1936
-24.4 C (-11.9 F)
1937
-26.7 C (-16.1 F)
1938
-13.3 C (8.1 F)
1939
-18.3 C (-0.9 F)
1940
-13.9 C (7.0 F)
1941
-13.9 C (7.0 F)
1942
-20.6 C (-5.1 F)
1943
-28.9 C (-20.0 F)
1944
-20.6 C (-5.1 F)
1945
-15.0 C (5.0 F)
1946
-15.6 C (3.9 F)
1947
-17.2 C (1.0 F)
1948
-20.6 C (-5.1 F)
1949
-27.8 C (-18.0 F)
1950
-33.3 C (-27.9 F)
1951
-25.6 C (-14.1 F)
1952
-21.7 C (-7.1 F)
1953
-11.1 C (12.0 F)
1954
-18.9 C (-2.0 F)
1955
-23.9 C (-11.0 F)
1956
-27.2 C (-17.0 F)
1957
-30.6 C (-23.1 F)
1958
-16.1 C (3.0 F)
1959
-24.4 C (-11.9 F)
1960
-20.6 C (-5.1 F)
1961
-18.3 C (-0.9 F)
1962
-26.7 C (-16.1 F)
1963
-20.6 C (-5.1 F)
1964
-23.9 C (-11.0 F)
1965
-19.4 C (-2.9 F)
1966
-15.0 C (5.0 F)
1967
-17.8 C (0.0 F)
1968
-26.7 C (-16.1 F)
1969
-28.3 C (-18.9 F)
1970
-17.2 C (1.0 F)
1971
-20.6 C (-5.1 F)
1972
-27.8 C (-18.0 F)
1973
-21.1 C (-6.0 F)
1974
-22.2 C (-8.0 F)
1975
-17.8 C (0.0 F)
1976
-20.0 C (-4.0 F)
1977
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Lake Keechelus, 1907 to 1977. The record is 152.4 mm (6.0 in) in 1907, marked on the chart; the median year is 73.7 mm (2.9 in).
Wettest day (Rx1day) at Lake Keechelus by year
Year
Wettest day (Rx1day)
1907
152.4 mm (6.0 in)
1908
71.1 mm (2.8 in)
1909
73.7 mm (2.9 in)
1910
76.2 mm (3.0 in)
1911
85.9 mm (3.4 in)
1912
58.4 mm (2.3 in)
1913
66.0 mm (2.6 in)
1914
66.5 mm (2.6 in)
1915
95.0 mm (3.7 in)
1916
102.1 mm (4.0 in)
1917
110.0 mm (4.3 in)
1918
88.4 mm (3.5 in)
1919
92.2 mm (3.6 in)
1920
66.5 mm (2.6 in)
1921
80.5 mm (3.2 in)
1922
43.7 mm (1.7 in)
1923
89.4 mm (3.5 in)
1924
67.6 mm (2.7 in)
1925
52.3 mm (2.1 in)
1926
54.4 mm (2.1 in)
1927
45.5 mm (1.8 in)
1928
53.3 mm (2.1 in)
1929
49.5 mm (1.9 in)
1930
55.9 mm (2.2 in)
1931
53.3 mm (2.1 in)
1932
113.8 mm (4.5 in)
1933
120.1 mm (4.7 in)
1934
135.9 mm (5.4 in)
1935
130.6 mm (5.1 in)
1936
78.7 mm (3.1 in)
1937
78.7 mm (3.1 in)
1938
56.9 mm (2.2 in)
1939
55.1 mm (2.2 in)
1940
73.7 mm (2.9 in)
1941
121.9 mm (4.8 in)
1942
81.8 mm (3.2 in)
1943
105.7 mm (4.2 in)
1944
52.1 mm (2.1 in)
1945
97.8 mm (3.9 in)
1946
90.9 mm (3.6 in)
1947
63.2 mm (2.5 in)
1948
66.5 mm (2.6 in)
1949
89.4 mm (3.5 in)
1950
63.8 mm (2.5 in)
1951
99.3 mm (3.9 in)
1952
57.7 mm (2.3 in)
1953
80.3 mm (3.2 in)
1954
57.7 mm (2.3 in)
1955
94.5 mm (3.7 in)
1956
134.6 mm (5.3 in)
1957
47.8 mm (1.9 in)
1958
79.2 mm (3.1 in)
1959
114.0 mm (4.5 in)
1960
63.5 mm (2.5 in)
1961
81.8 mm (3.2 in)
1962
94.0 mm (3.7 in)
1963
105.4 mm (4.1 in)
1964
79.8 mm (3.1 in)
1965
79.5 mm (3.1 in)
1966
72.1 mm (2.8 in)
1967
65.0 mm (2.6 in)
1968
69.3 mm (2.7 in)
1969
32.5 mm (1.3 in)
1970
69.1 mm (2.7 in)
1971
55.4 mm (2.2 in)
1972
88.9 mm (3.5 in)
1973
59.4 mm (2.3 in)
1974
67.3 mm (2.6 in)
1975
73.7 mm (2.9 in)
1976
110.0 mm (4.3 in)
1977
47.0 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lake Keechelus, 1907 to 1977. The record is 338.7 mm (13.3 in) in 1933, marked on the chart; the median year is 167.4 mm (6.6 in).
Wettest five days (Rx5day) at Lake Keechelus by year
Year
Wettest five days (Rx5day)
1907
147.3 mm (5.8 in)
1908
167.4 mm (6.6 in)
1909
114.3 mm (4.5 in)
1910
203.2 mm (8.0 in)
1911
107.6 mm (4.2 in)
1912
117.6 mm (4.6 in)
1913
85.4 mm (3.4 in)
1914
180.3 mm (7.1 in)
1915
152.9 mm (6.0 in)
1916
183.1 mm (7.2 in)
1917
287.1 mm (11.3 in)
1918
181.9 mm (7.2 in)
1919
195.0 mm (7.7 in)
1920
145.0 mm (5.7 in)
1921
228.0 mm (9.0 in)
1922
125.7 mm (4.9 in)
1923
254.8 mm (10.0 in)
1924
110.3 mm (4.3 in)
1925
111.7 mm (4.4 in)
1926
99.6 mm (3.9 in)
1927
115.3 mm (4.5 in)
1928
106.5 mm (4.2 in)
1929
111.2 mm (4.4 in)
1930
144.7 mm (5.7 in)
1931
118.4 mm (4.7 in)
1932
230.1 mm (9.1 in)
1933
338.7 mm (13.3 in)
1934
251.5 mm (9.9 in)
1935
272.0 mm (10.7 in)
1936
177.5 mm (7.0 in)
1937
219.2 mm (8.6 in)
1938
149.9 mm (5.9 in)
1939
169.9 mm (6.7 in)
1940
130.3 mm (5.1 in)
1941
184.3 mm (7.3 in)
1942
204.9 mm (8.1 in)
1943
181.7 mm (7.2 in)
1944
114.0 mm (4.5 in)
1945
153.1 mm (6.0 in)
1946
245.6 mm (9.7 in)
1947
180.6 mm (7.1 in)
1948
176.8 mm (7.0 in)
1949
215.0 mm (8.5 in)
1950
167.8 mm (6.6 in)
1951
226.3 mm (8.9 in)
1952
101.6 mm (4.0 in)
1953
193.5 mm (7.6 in)
1954
137.4 mm (5.4 in)
1955
184.5 mm (7.3 in)
1956
242.1 mm (9.5 in)
1957
135.8 mm (5.3 in)
1958
187.4 mm (7.4 in)
1959
259.1 mm (10.2 in)
1960
146.1 mm (5.8 in)
1961
129.1 mm (5.1 in)
1962
133.7 mm (5.3 in)
1963
139.6 mm (5.5 in)
1964
156.2 mm (6.1 in)
1965
299.2 mm (11.8 in)
1966
130.8 mm (5.1 in)
1967
177.0 mm (7.0 in)
1968
165.5 mm (6.5 in)
1969
69.1 mm (2.7 in)
1970
133.6 mm (5.3 in)
1971
132.1 mm (5.2 in)
1972
215.7 mm (8.5 in)
1973
134.1 mm (5.3 in)
1974
204.5 mm (8.1 in)
1975
265.3 mm (10.4 in)
1976
194.3 mm (7.6 in)
1977
75.8 mm (3.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lake Keechelus, 1907 to 1977. The record is 75 days in 1922, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Lake Keechelus by year
Year
Longest dry spell (CDD)
1907
1 day
1908
39 days
1909
38 days
1910
30 days
1911
43 days
1912
21 days
1913
16 days
1914
30 days
1915
21 days
1916
30 days
1917
30 days
1918
38 days
1919
30 days
1920
32 days
1921
45 days
1922
75 days
1923
43 days
1924
21 days
1925
61 days
1926
58 days
1927
19 days
1928
26 days
1929
31 days
1930
51 days
1931
53 days
1932
21 days
1933
26 days
1934
35 days
1935
18 days
1936
43 days
1937
23 days
1938
45 days
1939
35 days
1940
42 days
1941
28 days
1942
38 days
1943
24 days
1944
20 days
1945
32 days
1946
24 days
1947
20 days
1948
14 days
1949
15 days
1950
31 days
1951
51 days
1952
38 days
1953
24 days
1954
23 days
1955
44 days
1956
22 days
1957
30 days
1958
30 days
1959
21 days
1960
35 days
1961
39 days
1962
20 days
1963
24 days
1964
15 days
1965
29 days
1966
16 days
1967
71 days
1968
24 days
1969
24 days
1970
31 days
1971
40 days
1972
33 days
1973
40 days
1974
30 days
1975
30 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
58 years with a frost
Across 58 years with a frost, the median last spring frost at Lake Keechelus falls on 1 June and the median first autumn frost on 19 September, which leaves a median of 109 days between them.
Fitted over all years, the growing season changes by -3.1 days per decade at this station.
Frost dates and growing season at Lake Keechelus
Measure
Median, all years
Earliest period
Recent period (1943 to 1976)
Recent against earliest
Fitted trend
Last spring frost
1 June
n/a
2 June
n/a
-0.4 days per decade
First autumn frost
19 September
n/a
11 September
n/a
-3.5 days per decade
Growing days
109 days
n/a
105 days
n/a
-3.1 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
63 years, 1908 to 1976
A day with at least 76.0 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 153.3 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Lake Keechelus: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
76.0 mm (3.0 in)
5 years
97.6 mm (3.8 in)
10 years
111.6 mm (4.4 in)
25 years
128.7 mm (5.1 in)
50 years
141.2 mm (5.6 in)
100 years
153.3 mm (6.0 in)
Longer than the 63 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, 63 years of values from 1908 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: 135.9 mm (5.4 in) in 1934; 134.6 mm (5.3 in) in 1956; 130.6 mm (5.1 in) in 1935.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Lake Keechelus standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lake Keechelus 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.