Record envelope, standing records and threshold days for Tahtsa Lake West (CA001087950), British Columbia, Canada, with 50 years of record.
Key Facts for Tahtsa Lake West
Tahtsa Lake West (CA001087950) is a weather station in British Columbia, Canada at 53.62 latitude and -127.70 longitude, 863 m (2,831 ft) above sea level.
The station reports from 1951 to 2000, 50 years of record.
1,464 records set at Tahtsa Lake West still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Tahtsa Lake West set a daily record precipitation of 33.0 mm (1.3 in) on 25 October 1983.
About the Station
Location: British Columbia, Canada, 53.62 latitude, -127.70 longitude.
Elevation: 863 m (2,831 ft).
Period of record: 1951 to 2000, 50 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 Tahtsa Lake West. 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 Tahtsa Lake West, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
10.0 C (50.0 F)
-35.6 C (-32.1 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Mar
13.3 C (55.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Apr
21.1 C (70.0 F)
-19.4 C (-2.9 F)
n/a
n/a
May
30.0 C (86.0 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
28.3 C (82.9 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
31.7 C (89.1 F)
-1.7 C (28.9 F)
n/a
n/a
Aug
33.0 C (91.4 F)
-6.1 C (21.0 F)
n/a
n/a
Sep
27.8 C (82.0 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
20.0 C (68.0 F)
-15.0 C (5.0 F)
n/a
n/a
Nov
12.8 C (55.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Dec
10.6 C (51.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tahtsa Lake West still stand. 1955 holds the most, with 87.
Standing records at Tahtsa Lake West by the year they were set
Year set
Standing records
1952
45
1953
48
1954
77
1955
87
1956
74
1957
55
1958
55
1959
37
1960
23
1961
26
1962
35
1963
38
1964
42
1965
50
1966
41
1967
30
1968
50
1969
67
1970
37
1971
60
1972
54
1973
43
1974
29
1975
42
1976
40
1977
39
1978
38
1979
52
1980
38
1981
37
1982
40
1983
35
Wettest Day of Each Month
Nov: 133.4 mm (5.3 in)
The wettest day on record for each calendar month at Tahtsa Lake West. The most was 133.4 mm (5.3 in) on 1 November 1978.
Record daily precipitation for each month at Tahtsa Lake West
Month
Record daily precipitation (mm)
Date
Jan
106.7 mm (4.2 in)
27 January 1962
Feb
95.0 mm (3.7 in)
3 February 1968
Mar
59.2 mm (2.3 in)
28 March 1966
Apr
54.4 mm (2.1 in)
16 April 1952
May
41.9 mm (1.6 in)
15 May 1970
Jun
45.7 mm (1.8 in)
2 June 1965
Jul
45.2 mm (1.8 in)
8 July 1972
Aug
52.8 mm (2.1 in)
6 August 1978
Sep
111.8 mm (4.4 in)
30 September 1956
Oct
128.3 mm (5.1 in)
28 October 1966
Nov
133.4 mm (5.3 in)
1 November 1978
Dec
94.7 mm (3.7 in)
12 December 1952
Period of Record Coverage
1952 to 1983
Complete yearUnder 90 percent of days
32 years of record at Tahtsa Lake West, 1952 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1952.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Tahtsa Lake West, 1953 to 1983. Blue stripes are years cooler than the station's own mean of 1.8 C (35.3 F); red stripes are warmer. The coolest year was 1955, at -0.7 C (30.8 F), and the warmest was 1981, at 3.3 C (37.9 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Tahtsa Lake West as warming stripes, 1953 to 1983
Year
Annual mean temperature
Difference from the station mean
1953
2.7 C
+0.91 C
1954
2.1 C
+0.22 C
1955
-0.7 C
-2.51 C
1956
0.9 C
-0.93 C
1957
1.2 C
-0.68 C
1958
2.9 C
+1.09 C
1959
1.4 C
-0.44 C
1960
2.2 C
+0.34 C
1961
2.6 C
+0.79 C
1962
2.1 C
+0.24 C
1963
3.0 C
+1.21 C
1964
0.8 C
-1.08 C
1965
2.0 C
+0.20 C
1966
1.4 C
-0.39 C
1967
2.3 C
+0.49 C
1968
1.4 C
-0.43 C
1969
1.9 C
+0.04 C
1970
1.6 C
-0.21 C
1971
1.2 C
-0.59 C
1972
1.1 C
-0.76 C
1973
1.0 C
-0.88 C
1974
2.3 C
+0.43 C
1975
1.3 C
-0.58 C
1976
2.0 C
+0.14 C
1977
2.3 C
+0.42 C
1978
2.1 C
+0.31 C
1979
2.1 C
+0.24 C
1980
2.3 C
+0.45 C
1981
3.3 C
+1.46 C
1982
1.4 C
-0.45 C
1983
2.7 C
+0.90 C
The fitted trend in annual mean temperature here over 1953 to 1983 is 0.2 C (-0.1 to 0.5) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.3 to 0.9) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tahtsa Lake West
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (-0.1 to 0.5) per decade
0.3 F (-0.3 to 0.9) per decade
1953 to 1983
31
Not clearly different from zero
Mean daily maximum
0.2 C (-0.2 to 0.5) per decade
0.3 F (-0.3 to 1.0) per decade
1953 to 1983
31
Not clearly different from zero
Mean daily minimum
0.2 C (-0.2 to 0.6) per decade
0.4 F (-0.3 to 1.0) per decade
1953 to 1983
31
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
1951 to 1983
Yearly extremes at Tahtsa Lake West: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.0 C (91.4 F)
1981
27.9 C (82.2 F)
32
Coldest night (TNn)
-35.6 C (-32.1 F)
1969
-28.3 C (-18.9 F)
32
Wettest day (Rx1day)
133.4 mm (5.3 in)
1978
78.7 mm (3.1 in)
33
Wettest five days (Rx5day)
293.4 mm (11.6 in)
1978
154.7 mm (6.1 in)
33
Longest dry spell (CDD)
33 days
1982
18 days
33
Hottest day (TXx)
The hottest day of the year at Tahtsa Lake West, 1951 to 1983. The record is 33.0 C (91.4 F) in 1981, marked on the chart; the median year is 27.9 C (82.2 F).
Hottest day (TXx) at Tahtsa Lake West by year
Year
Hottest day (TXx)
1951
n/a
1952
29.4 C (84.9 F)
1953
30.0 C (86.0 F)
1954
26.1 C (79.0 F)
1955
27.8 C (82.0 F)
1956
29.4 C (84.9 F)
1957
25.0 C (77.0 F)
1958
30.0 C (86.0 F)
1959
25.6 C (78.1 F)
1960
29.4 C (84.9 F)
1961
29.4 C (84.9 F)
1962
27.8 C (82.0 F)
1963
27.2 C (81.0 F)
1964
23.3 C (73.9 F)
1965
29.4 C (84.9 F)
1966
27.8 C (82.0 F)
1967
27.8 C (82.0 F)
1968
25.6 C (78.1 F)
1969
28.3 C (82.9 F)
1970
23.9 C (75.0 F)
1971
31.7 C (89.1 F)
1972
26.1 C (79.0 F)
1973
23.9 C (75.0 F)
1974
30.0 C (86.0 F)
1975
26.7 C (80.1 F)
1976
23.3 C (73.9 F)
1977
30.6 C (87.1 F)
1978
28.3 C (82.9 F)
1979
28.0 C (82.4 F)
1980
26.0 C (78.8 F)
1981
33.0 C (91.4 F)
1982
31.0 C (87.8 F)
1983
30.0 C (86.0 F)
Coldest night (TNn)
The coldest night of the year at Tahtsa Lake West, 1951 to 1983. The record is -35.6 C (-32.1 F) in 1969, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Tahtsa Lake West by year
Year
Coldest night (TNn)
1951
n/a
1952
-31.1 C (-24.0 F)
1953
-28.3 C (-18.9 F)
1954
-28.3 C (-18.9 F)
1955
-31.1 C (-24.0 F)
1956
-35.0 C (-31.0 F)
1957
-31.7 C (-25.1 F)
1958
-23.3 C (-9.9 F)
1959
-28.3 C (-18.9 F)
1960
-27.2 C (-17.0 F)
1961
-22.2 C (-8.0 F)
1962
-31.7 C (-25.1 F)
1963
-23.3 C (-9.9 F)
1964
-30.0 C (-22.0 F)
1965
-30.0 C (-22.0 F)
1966
-30.6 C (-23.1 F)
1967
-27.8 C (-18.0 F)
1968
-32.2 C (-26.0 F)
1969
-35.6 C (-32.1 F)
1970
-27.8 C (-18.0 F)
1971
-28.9 C (-20.0 F)
1972
-27.8 C (-18.0 F)
1973
-24.4 C (-11.9 F)
1974
-31.7 C (-25.1 F)
1975
-28.9 C (-20.0 F)
1976
-26.7 C (-16.1 F)
1977
-26.7 C (-16.1 F)
1978
-24.0 C (-11.2 F)
1979
-26.0 C (-14.8 F)
1980
-28.0 C (-18.4 F)
1981
-21.0 C (-5.8 F)
1982
-29.0 C (-20.2 F)
1983
-23.0 C (-9.4 F)
Wettest day (Rx1day)
The wettest day of the year at Tahtsa Lake West, 1951 to 1983. The record is 133.4 mm (5.3 in) in 1978, marked on the chart; the median year is 78.7 mm (3.1 in).
Wettest day (Rx1day) at Tahtsa Lake West by year
Year
Wettest day (Rx1day)
1951
26.7 mm (1.1 in)
1952
94.7 mm (3.7 in)
1953
83.8 mm (3.3 in)
1954
73.9 mm (2.9 in)
1955
50.0 mm (2.0 in)
1956
111.8 mm (4.4 in)
1957
65.3 mm (2.6 in)
1958
76.2 mm (3.0 in)
1959
50.8 mm (2.0 in)
1960
96.5 mm (3.8 in)
1961
83.8 mm (3.3 in)
1962
106.7 mm (4.2 in)
1963
78.7 mm (3.1 in)
1964
63.5 mm (2.5 in)
1965
94.5 mm (3.7 in)
1966
128.3 mm (5.1 in)
1967
62.7 mm (2.5 in)
1968
95.0 mm (3.7 in)
1969
53.6 mm (2.1 in)
1970
51.6 mm (2.0 in)
1971
85.9 mm (3.4 in)
1972
91.4 mm (3.6 in)
1973
69.9 mm (2.8 in)
1974
109.2 mm (4.3 in)
1975
104.9 mm (4.1 in)
1976
76.2 mm (3.0 in)
1977
81.3 mm (3.2 in)
1978
133.4 mm (5.3 in)
1979
92.8 mm (3.7 in)
1980
63.6 mm (2.5 in)
1981
72.1 mm (2.8 in)
1982
50.3 mm (2.0 in)
1983
33.0 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tahtsa Lake West, 1951 to 1983. The record is 293.4 mm (11.6 in) in 1978, marked on the chart; the median year is 154.7 mm (6.1 in).
Wettest five days (Rx5day) at Tahtsa Lake West by year
Year
Wettest five days (Rx5day)
1951
65.9 mm (2.6 in)
1952
202.6 mm (8.0 in)
1953
161.6 mm (6.4 in)
1954
154.7 mm (6.1 in)
1955
127.0 mm (5.0 in)
1956
170.8 mm (6.7 in)
1957
144.1 mm (5.7 in)
1958
140.5 mm (5.5 in)
1959
104.9 mm (4.1 in)
1960
147.5 mm (5.8 in)
1961
143.8 mm (5.7 in)
1962
242.3 mm (9.5 in)
1963
184.0 mm (7.2 in)
1964
151.8 mm (6.0 in)
1965
214.6 mm (8.4 in)
1966
185.9 mm (7.3 in)
1967
166.0 mm (6.5 in)
1968
191.0 mm (7.5 in)
1969
139.1 mm (5.5 in)
1970
137.0 mm (5.4 in)
1971
187.5 mm (7.4 in)
1972
170.2 mm (6.7 in)
1973
161.1 mm (6.3 in)
1974
202.6 mm (8.0 in)
1975
234.1 mm (9.2 in)
1976
149.6 mm (5.9 in)
1977
137.2 mm (5.4 in)
1978
293.4 mm (11.6 in)
1979
131.3 mm (5.2 in)
1980
172.5 mm (6.8 in)
1981
100.5 mm (4.0 in)
1982
122.4 mm (4.8 in)
1983
106.0 mm (4.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tahtsa Lake West, 1951 to 1983. The record is 33 days in 1982, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Tahtsa Lake West by year
Year
Longest dry spell (CDD)
1951
3 days
1952
32 days
1953
15 days
1954
20 days
1955
14 days
1956
16 days
1957
21 days
1958
23 days
1959
13 days
1960
20 days
1961
20 days
1962
17 days
1963
14 days
1964
8 days
1965
19 days
1966
11 days
1967
20 days
1968
13 days
1969
19 days
1970
12 days
1971
22 days
1972
10 days
1973
22 days
1974
18 days
1975
14 days
1976
12 days
1977
21 days
1978
25 days
1979
19 days
1980
11 days
1981
19 days
1982
33 days
1983
16 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
31 years with a frost
Across 31 years with a frost, the median last spring frost at Tahtsa Lake West falls on 22 June and the median first autumn frost on 24 July, which leaves a median of 30 days between them.
Fitted over all years, the growing season changes by -4.3 days per decade at this station.
Frost dates and growing season at Tahtsa Lake West
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
22 June
n/a
22 June
n/a
0.0 days per decade
First autumn frost
24 July
n/a
21 July
n/a
-4.3 days per decade
Growing days
30 days
n/a
30 days
n/a
-4.3 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
32 years, 1952 to 1983
A day with at least 79.6 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 139.7 mm (5.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Tahtsa Lake West: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
79.6 mm (3.1 in)
5 years
101.0 mm (4.0 in)
10 years
112.8 mm (4.4 in)
25 years
125.2 mm (4.9 in)
50 years
133.0 mm (5.2 in)
Longer than the 32 years of record
100 years
139.7 mm (5.5 in)
Longer than the 32 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, 32 years of values from 1952 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: 133.4 mm (5.3 in) in 1978; 128.3 mm (5.1 in) in 1966; 111.8 mm (4.4 in) in 1956.
Download the Data
Data for Tahtsa Lake West standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tahtsa Lake West 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.