Record envelope, standing records and threshold days for Tatlayoko Lake (CA001088010), British Columbia, Canada, with 78 years of record.
Key Facts for Tatlayoko Lake
Tatlayoko Lake (CA001088010) is a weather station in British Columbia, Canada at 51.67 latitude and -124.40 longitude, 870 m (2,854 ft) above sea level.
The station reports from 1928 to 2005, 78 years of record.
1,464 records set at Tatlayoko Lake still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Tatlayoko Lake set a daily record low minimum temperature of -31.5 C (-24.7 F) on 23 December 1983.
About the Station
Location: British Columbia, Canada, 51.67 latitude, -124.40 longitude.
Elevation: 870 m (2,854 ft).
Period of record: 1928 to 2005, 78 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Tatlayoko Lake. 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 Tatlayoko Lake, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.6 C (60.1 F)
-43.3 C (-45.9 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Mar
19.4 C (66.9 F)
-32.8 C (-27.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-21.1 C (-6.0 F)
n/a
n/a
May
33.5 C (92.3 F)
-8.0 C (17.6 F)
n/a
n/a
Jun
32.8 C (91.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Aug
33.9 C (93.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
32.2 C (90.0 F)
-9.5 C (14.9 F)
n/a
n/a
Oct
27.8 C (82.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
18.3 C (64.9 F)
-31.1 C (-24.0 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-40.6 C (-41.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tatlayoko Lake still stand. 1936 holds the most, with 63.
Standing records at Tatlayoko Lake by the year they were set
Year set
Standing records
1930
34
1931
23
1932
30
1933
46
1934
49
1935
41
1936
63
1937
39
1938
25
1939
46
1940
24
1941
33
1942
13
1943
34
1944
23
1945
25
1946
17
1947
42
1948
13
1949
42
1950
37
1951
38
1952
31
1953
12
1954
38
1955
48
1956
26
1957
27
1958
13
1959
29
1960
13
1961
21
1962
21
1963
22
1964
20
1965
31
1966
21
1967
17
1968
17
1969
25
1970
20
1971
28
1972
30
1973
15
1974
8
1975
13
1976
20
1977
23
1978
24
1979
23
1980
30
1981
18
1982
21
1983
22
All-Time Record Progression
3 new records
3 all-time records were set at Tatlayoko Lake between 16 July 1962 and 24 February 1979. Each dot is a new record.
When Tatlayoko Lake set new all-time records
Date
Kind
Detail
1962-07-16
Record daily precipitation
Record daily precipitation 53.3 mm (2.1 in)
1975-11-03
Record daily precipitation
Record daily precipitation 68.1 mm (2.7 in)
1979-02-24
Record daily snowfall
Record daily snowfall 48.0 cm (18.9 in)
Wettest Day of Each Month
Nov: 68.1 mm (2.7 in)
The wettest day on record for each calendar month at Tatlayoko Lake. The most was 68.1 mm (2.7 in) on 3 November 1975.
Record daily precipitation for each month at Tatlayoko Lake
Month
Record daily precipitation (mm)
Date
Jan
44.5 mm (1.8 in)
8 January 1953
Feb
48.0 mm (1.9 in)
24 February 1979
Mar
40.6 mm (1.6 in)
20 March 1963
Apr
37.0 mm (1.5 in)
24 April 1983
May
30.5 mm (1.2 in)
15 May 1972
Jun
30.2 mm (1.2 in)
28 June 1980
Jul
53.3 mm (2.1 in)
16 July 1962
Aug
36.6 mm (1.4 in)
13 August 1937
Sep
51.3 mm (2.0 in)
5 September 1957
Oct
49.0 mm (1.9 in)
30 October 1981
Nov
68.1 mm (2.7 in)
3 November 1975
Dec
57.7 mm (2.3 in)
15 December 1976
Period of Record Coverage
1930 to 1983
Complete yearUnder 90 percent of days
54 years of record at Tatlayoko Lake, 1930 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1977.
Cooler than the station meanWarmer than the station mean
One stripe for each of 50 complete years at Tatlayoko Lake, 1930 to 1983. Blue stripes are years cooler than the station's own mean of 4.2 C (39.5 F); red stripes are warmer. The coolest year was 1957, at 2.2 C (36.0 F), and the warmest was 1941, at 5.9 C (42.5 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Tatlayoko Lake as warming stripes, 1930 to 1983
Year
Annual mean temperature
Difference from the station mean
1930
4.4 C
+0.26 C
1931
5.1 C
+0.92 C
1932
4.3 C
+0.14 C
1933
3.8 C
-0.41 C
1934
5.3 C
+1.11 C
1935
4.3 C
+0.09 C
1936
3.9 C
-0.28 C
1937
3.0 C
-1.19 C
1939
5.4 C
+1.26 C
1940
5.5 C
+1.28 C
1941
5.9 C
+1.68 C
1942
5.1 C
+0.93 C
1943
4.3 C
+0.15 C
1944
5.0 C
+0.82 C
1945
4.7 C
+0.51 C
1946
4.8 C
+0.61 C
1947
5.3 C
+1.08 C
1948
3.9 C
-0.23 C
1949
4.1 C
-0.09 C
1950
2.5 C
-1.69 C
1951
3.7 C
-0.52 C
1952
4.7 C
+0.50 C
1953
5.1 C
+0.92 C
1954
3.6 C
-0.58 C
1956
2.6 C
-1.60 C
1957
2.2 C
-1.96 C
1958
4.0 C
-0.14 C
1959
3.1 C
-1.10 C
1960
4.3 C
+0.09 C
1961
4.8 C
+0.62 C
1963
5.3 C
+1.10 C
1964
3.6 C
-0.53 C
1965
4.2 C
+0.01 C
1966
4.0 C
-0.13 C
1967
5.1 C
+0.94 C
1968
3.9 C
-0.28 C
1969
3.9 C
-0.25 C
1970
3.8 C
-0.37 C
1971
3.9 C
-0.26 C
1972
3.2 C
-0.96 C
1973
3.7 C
-0.49 C
1974
4.4 C
+0.26 C
1975
3.4 C
-0.82 C
1976
4.4 C
+0.25 C
1978
3.7 C
-0.49 C
1979
3.9 C
-0.31 C
1980
4.0 C
-0.19 C
1981
4.7 C
+0.52 C
1982
3.2 C
-0.93 C
1983
3.8 C
-0.38 C
The annual mean temperature here has fallen by 0.16 C (0.02 to 0.31) per decade over 1930 to 1983. In Fahrenheit: 0.30 F (0.04 to 0.55) per decade. The slope is a straight line fitted to 50 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tatlayoko Lake
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.16 C (-0.30 to -0.02) per decade
-0.30 F (-0.55 to -0.04) per decade
1930 to 1983
50
Fall
Mean daily maximum
-0.21 C (-0.37 to -0.04) per decade
-0.4 F (-0.7 to -0.1) per decade
1930 to 1983
50
Fall
Mean daily minimum
-0.12 C (-0.27 to 0.03) per decade
-0.22 F (-0.49 to 0.05) per decade
1930 to 1983
50
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
1928 to 1983
Yearly extremes at Tatlayoko Lake: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1941
32.2 C (90.0 F)
54
Coldest night (TNn)
-43.3 C (-45.9 F)
1950
-31.8 C (-25.3 F)
54
Wettest day (Rx1day)
68.1 mm (2.7 in)
1975
32.9 mm (1.3 in)
56
Wettest five days (Rx5day)
190.0 mm (7.5 in)
1975
54.5 mm (2.1 in)
56
Longest dry spell (CDD)
50 days
1981
28 days
56
Hottest day (TXx)
The hottest day of the year at Tatlayoko Lake, 1928 to 1983. The record is 37.8 C (100.0 F) in 1941, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Tatlayoko Lake by year
Year
Hottest day (TXx)
1928
n/a
1929
n/a
1930
31.7 C (89.1 F)
1931
32.2 C (90.0 F)
1932
32.2 C (90.0 F)
1933
32.8 C (91.0 F)
1934
32.8 C (91.0 F)
1935
32.8 C (91.0 F)
1936
33.3 C (91.9 F)
1937
30.6 C (87.1 F)
1938
33.3 C (91.9 F)
1939
33.9 C (93.0 F)
1940
32.2 C (90.0 F)
1941
37.8 C (100.0 F)
1942
32.2 C (90.0 F)
1943
29.4 C (84.9 F)
1944
33.3 C (91.9 F)
1945
32.8 C (91.0 F)
1946
31.1 C (88.0 F)
1947
30.6 C (87.1 F)
1948
31.1 C (88.0 F)
1949
30.6 C (87.1 F)
1950
31.1 C (88.0 F)
1951
32.2 C (90.0 F)
1952
32.8 C (91.0 F)
1953
30.6 C (87.1 F)
1954
26.1 C (79.0 F)
1955
29.4 C (84.9 F)
1956
31.1 C (88.0 F)
1957
27.2 C (81.0 F)
1958
29.4 C (84.9 F)
1959
31.7 C (89.1 F)
1960
33.3 C (91.9 F)
1961
33.9 C (93.0 F)
1962
30.0 C (86.0 F)
1963
29.4 C (84.9 F)
1964
27.8 C (82.0 F)
1965
33.9 C (93.0 F)
1966
31.7 C (89.1 F)
1967
32.2 C (90.0 F)
1968
30.6 C (87.1 F)
1969
32.8 C (91.0 F)
1970
32.2 C (90.0 F)
1971
35.0 C (95.0 F)
1972
32.2 C (90.0 F)
1973
31.7 C (89.1 F)
1974
32.2 C (90.0 F)
1975
32.2 C (90.0 F)
1976
25.6 C (78.1 F)
1977
32.8 C (91.0 F)
1978
33.0 C (91.4 F)
1979
31.5 C (88.7 F)
1980
28.0 C (82.4 F)
1981
32.0 C (89.6 F)
1982
30.5 C (86.9 F)
1983
33.5 C (92.3 F)
Coldest night (TNn)
The coldest night of the year at Tatlayoko Lake, 1928 to 1983. The record is -43.3 C (-45.9 F) in 1950, marked on the chart; the median year is -31.8 C (-25.3 F).
Coldest night (TNn) at Tatlayoko Lake by year
Year
Coldest night (TNn)
1928
n/a
1929
n/a
1930
-35.6 C (-32.1 F)
1931
-21.1 C (-6.0 F)
1932
-33.3 C (-27.9 F)
1933
-31.1 C (-24.0 F)
1934
-28.9 C (-20.0 F)
1935
-39.4 C (-38.9 F)
1936
-37.2 C (-35.0 F)
1937
-36.7 C (-34.1 F)
1938
-30.0 C (-22.0 F)
1939
-31.1 C (-24.0 F)
1940
-25.0 C (-13.0 F)
1941
-27.8 C (-18.0 F)
1942
-25.0 C (-13.0 F)
1943
-37.2 C (-35.0 F)
1944
-22.2 C (-8.0 F)
1945
-22.2 C (-8.0 F)
1946
-27.8 C (-18.0 F)
1947
-36.7 C (-34.1 F)
1948
-27.8 C (-18.0 F)
1949
-32.2 C (-26.0 F)
1950
-43.3 C (-45.9 F)
1951
-34.4 C (-29.9 F)
1952
-34.4 C (-29.9 F)
1953
-32.8 C (-27.0 F)
1954
-36.1 C (-33.0 F)
1955
-32.8 C (-27.0 F)
1956
-36.7 C (-34.1 F)
1957
-36.1 C (-33.0 F)
1958
-23.9 C (-11.0 F)
1959
-31.1 C (-24.0 F)
1960
-23.9 C (-11.0 F)
1961
-24.4 C (-11.9 F)
1962
-30.6 C (-23.1 F)
1963
-32.2 C (-26.0 F)
1964
-35.6 C (-32.1 F)
1965
-31.1 C (-24.0 F)
1966
-31.1 C (-24.0 F)
1967
-26.7 C (-16.1 F)
1968
-40.6 C (-41.1 F)
1969
-39.4 C (-38.9 F)
1970
-30.6 C (-23.1 F)
1971
-34.4 C (-29.9 F)
1972
-37.2 C (-35.0 F)
1973
-29.4 C (-20.9 F)
1974
-26.1 C (-15.0 F)
1975
-29.4 C (-20.9 F)
1976
-30.0 C (-22.0 F)
1977
-35.5 C (-31.9 F)
1978
-36.0 C (-32.8 F)
1979
-35.0 C (-31.0 F)
1980
-35.0 C (-31.0 F)
1981
-27.0 C (-16.6 F)
1982
-37.0 C (-34.6 F)
1983
-31.5 C (-24.7 F)
Wettest day (Rx1day)
The wettest day of the year at Tatlayoko Lake, 1928 to 1983. The record is 68.1 mm (2.7 in) in 1975, marked on the chart; the median year is 32.9 mm (1.3 in).
Wettest day (Rx1day) at Tatlayoko Lake by year
Year
Wettest day (Rx1day)
1928
24.9 mm (1.0 in)
1929
30.5 mm (1.2 in)
1930
33.0 mm (1.3 in)
1931
32.5 mm (1.3 in)
1932
25.4 mm (1.0 in)
1933
24.6 mm (1.0 in)
1934
45.7 mm (1.8 in)
1935
34.8 mm (1.4 in)
1936
41.7 mm (1.6 in)
1937
36.6 mm (1.4 in)
1938
32.8 mm (1.3 in)
1939
32.5 mm (1.3 in)
1940
18.3 mm (0.7 in)
1941
47.0 mm (1.9 in)
1942
24.6 mm (1.0 in)
1943
24.4 mm (1.0 in)
1944
18.5 mm (0.7 in)
1945
22.4 mm (0.9 in)
1946
25.9 mm (1.0 in)
1947
43.9 mm (1.7 in)
1948
35.1 mm (1.4 in)
1949
47.0 mm (1.9 in)
1950
34.3 mm (1.4 in)
1951
38.1 mm (1.5 in)
1952
20.3 mm (0.8 in)
1953
44.5 mm (1.8 in)
1954
24.1 mm (0.9 in)
1955
28.7 mm (1.1 in)
1956
19.1 mm (0.8 in)
1957
51.3 mm (2.0 in)
1958
26.2 mm (1.0 in)
1959
39.4 mm (1.6 in)
1960
35.1 mm (1.4 in)
1961
39.9 mm (1.6 in)
1962
53.3 mm (2.1 in)
1963
47.2 mm (1.9 in)
1964
30.2 mm (1.2 in)
1965
32.0 mm (1.3 in)
1966
24.9 mm (1.0 in)
1967
46.2 mm (1.8 in)
1968
29.0 mm (1.1 in)
1969
36.3 mm (1.4 in)
1970
38.1 mm (1.5 in)
1971
16.3 mm (0.6 in)
1972
30.5 mm (1.2 in)
1973
29.7 mm (1.2 in)
1974
36.3 mm (1.4 in)
1975
68.1 mm (2.7 in)
1976
57.7 mm (2.3 in)
1977
22.9 mm (0.9 in)
1978
25.4 mm (1.0 in)
1979
48.0 mm (1.9 in)
1980
30.2 mm (1.2 in)
1981
49.0 mm (1.9 in)
1982
42.2 mm (1.7 in)
1983
37.0 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tatlayoko Lake, 1928 to 1983. The record is 190.0 mm (7.5 in) in 1975, marked on the chart; the median year is 54.5 mm (2.1 in).
Wettest five days (Rx5day) at Tatlayoko Lake by year
Year
Wettest five days (Rx5day)
1928
38.6 mm (1.5 in)
1929
65.3 mm (2.6 in)
1930
47.6 mm (1.9 in)
1931
51.6 mm (2.0 in)
1932
57.1 mm (2.2 in)
1933
48.1 mm (1.9 in)
1934
63.5 mm (2.5 in)
1935
69.1 mm (2.7 in)
1936
63.8 mm (2.5 in)
1937
79.2 mm (3.1 in)
1938
55.5 mm (2.2 in)
1939
78.7 mm (3.1 in)
1940
28.5 mm (1.1 in)
1941
74.4 mm (2.9 in)
1942
51.6 mm (2.0 in)
1943
39.9 mm (1.6 in)
1944
29.8 mm (1.2 in)
1945
32.1 mm (1.3 in)
1946
47.4 mm (1.9 in)
1947
44.2 mm (1.7 in)
1948
71.4 mm (2.8 in)
1949
66.3 mm (2.6 in)
1950
68.1 mm (2.7 in)
1951
48.8 mm (1.9 in)
1952
28.7 mm (1.1 in)
1953
103.1 mm (4.1 in)
1954
50.5 mm (2.0 in)
1955
52.3 mm (2.1 in)
1956
34.6 mm (1.4 in)
1957
58.4 mm (2.3 in)
1958
56.2 mm (2.2 in)
1959
60.8 mm (2.4 in)
1960
44.5 mm (1.8 in)
1961
55.6 mm (2.2 in)
1962
70.0 mm (2.8 in)
1963
88.1 mm (3.5 in)
1964
39.1 mm (1.5 in)
1965
55.9 mm (2.2 in)
1966
41.2 mm (1.6 in)
1967
63.3 mm (2.5 in)
1968
65.0 mm (2.6 in)
1969
66.6 mm (2.6 in)
1970
47.8 mm (1.9 in)
1971
22.8 mm (0.9 in)
1972
35.3 mm (1.4 in)
1973
53.4 mm (2.1 in)
1974
90.6 mm (3.6 in)
1975
190.0 mm (7.5 in)
1976
71.9 mm (2.8 in)
1977
35.7 mm (1.4 in)
1978
39.2 mm (1.5 in)
1979
51.2 mm (2.0 in)
1980
49.0 mm (1.9 in)
1981
108.4 mm (4.3 in)
1982
58.0 mm (2.3 in)
1983
49.2 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tatlayoko Lake, 1928 to 1983. The record is 50 days in 1981, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Tatlayoko Lake by year
Year
Longest dry spell (CDD)
1928
25 days
1929
25 days
1930
31 days
1931
33 days
1932
24 days
1933
34 days
1934
25 days
1935
43 days
1936
26 days
1937
29 days
1938
40 days
1939
32 days
1940
23 days
1941
23 days
1942
37 days
1943
24 days
1944
28 days
1945
22 days
1946
35 days
1947
17 days
1948
15 days
1949
28 days
1950
22 days
1951
33 days
1952
35 days
1953
25 days
1954
20 days
1955
38 days
1956
34 days
1957
21 days
1958
40 days
1959
26 days
1960
37 days
1961
35 days
1962
25 days
1963
40 days
1964
23 days
1965
39 days
1966
26 days
1967
23 days
1968
39 days
1969
24 days
1970
31 days
1971
26 days
1972
33 days
1973
23 days
1974
40 days
1975
32 days
1976
31 days
1977
27 days
1978
35 days
1979
19 days
1980
22 days
1981
50 days
1982
26 days
1983
45 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
50 years with a frost
Across 50 years with a frost, the median last spring frost at Tatlayoko Lake falls on 20 June and the median first autumn frost on 26 July, which leaves a median of 42 days between them.
Fitted over all years, the growing season changes by +2.5 days per decade at this station.
Frost dates and growing season at Tatlayoko Lake
Measure
Median, all years
Earliest period
Recent period (1951 to 1983)
Recent against earliest
Fitted trend
Last spring frost
20 June
n/a
22 June
n/a
+0.3 days per decade
First autumn frost
26 July
n/a
5 August
n/a
+2.7 days per decade
Growing days
42 days
n/a
49 days
n/a
+2.5 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
54 years, 1929 to 1983
A day with at least 33.7 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 65.6 mm (2.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Tatlayoko Lake: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
33.7 mm (1.3 in)
5 years
43.6 mm (1.7 in)
10 years
49.6 mm (2.0 in)
25 years
56.5 mm (2.2 in)
50 years
61.2 mm (2.4 in)
100 years
65.6 mm (2.6 in)
Longer than the 54 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, 54 years of values from 1929 to 1983.
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: 68.1 mm (2.7 in) in 1975; 57.7 mm (2.3 in) in 1976; 53.3 mm (2.1 in) in 1962.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Tatlayoko Lake, at 1956 and 1963. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1956 ran 1.2 C (2.1 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1963 ran 0.9 C (1.6 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Tatlayoko Lake, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1956
-1.2
-2.1
possible
5
1963
+0.9
+1.6
possible
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 Tatlayoko Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tatlayoko Lake 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.