Record envelope, standing records and threshold days for Coquitlam Lake (CA001101890), British Columbia, Canada, with 59 years of record.
Key Facts for Coquitlam Lake
Coquitlam Lake (CA001101890) is a weather station in British Columbia, Canada at 49.37 latitude and -122.80 longitude, 161 m (528 ft) above sea level.
The station reports from 1924 to 1982, 59 years of record.
1,464 records set at Coquitlam Lake still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Coquitlam Lake set a daily record high minimum temperature of 12.5 C (54.5 F) on 25 September 1982.
About the Station
Location: British Columbia, Canada, 49.37 latitude, -122.80 longitude.
Elevation: 161 m (528 ft).
Period of record: 1924 to 1982, 59 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 Coquitlam 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 Coquitlam Lake, 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)
-18.9 C (-2.0 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-16.7 C (1.9 F)
n/a
n/a
Mar
21.1 C (70.0 F)
-12.2 C (10.0 F)
n/a
n/a
Apr
26.1 C (79.0 F)
-5.6 C (21.9 F)
n/a
n/a
May
32.8 C (91.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
34.0 C (93.2 F)
1.7 C (35.1 F)
n/a
n/a
Jul
36.7 C (98.1 F)
3.3 C (37.9 F)
n/a
n/a
Aug
35.5 C (95.9 F)
4.4 C (39.9 F)
n/a
n/a
Sep
31.7 C (89.1 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
25.0 C (77.0 F)
-5.0 C (23.0 F)
n/a
n/a
Nov
18.9 C (66.0 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
13.3 C (55.9 F)
-18.9 C (-2.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Coquitlam Lake still stand. 1936 holds the most, with 62.
Standing records at Coquitlam Lake by the year they were set
Year set
Standing records
1935
20
1936
62
1937
41
1938
30
1939
38
1940
38
1941
52
1942
37
1943
20
1944
21
1945
25
1946
22
1947
20
1948
24
1949
47
1950
49
1951
24
1952
36
1953
21
1954
33
1955
46
1956
35
1957
19
1958
42
1959
32
1960
18
1961
29
1962
55
1963
35
1964
18
1965
21
1966
16
1967
13
1968
32
1969
25
1970
21
1971
25
1972
36
1973
28
1974
29
1975
21
1976
23
1977
36
1978
29
1979
24
1980
28
1981
49
1982
19
All-Time Record Progression
1 new records
1 all-time records were set at Coquitlam Lake between 2 November 1955 and 2 November 1955. Each dot is a new record.
When Coquitlam Lake set new all-time records
Date
Kind
Detail
1955-11-02
Record daily precipitation
Record daily precipitation 203.2 mm (8.0 in)
Wettest Day of Each Month
Nov: 203.2 mm (8.0 in)
The wettest day on record for each calendar month at Coquitlam Lake. The most was 203.2 mm (8.0 in) on 2 November 1955.
Record daily precipitation for each month at Coquitlam Lake
Month
Record daily precipitation (mm)
Date
Jan
190.5 mm (7.5 in)
18 January 1968
Feb
152.4 mm (6.0 in)
15 February 1954
Mar
127.8 mm (5.0 in)
25 March 1946
Apr
145.5 mm (5.7 in)
28 April 1959
May
113.8 mm (4.5 in)
1 May 1927
Jun
98.0 mm (3.9 in)
16 June 1937
Jul
128.8 mm (5.1 in)
11 July 1972
Aug
98.6 mm (3.9 in)
31 August 1936
Sep
136.4 mm (5.4 in)
29 September 1964
Oct
176.5 mm (6.9 in)
12 October 1973
Nov
203.2 mm (8.0 in)
2 November 1955
Dec
194.3 mm (7.6 in)
29 December 1962
Period of Record Coverage
1935 to 1982
Complete yearUnder 90 percent of days
48 years of record at Coquitlam Lake, 1935 to 1982. 2 years have data for under 90 percent of days and are left out of rankings: 1935, 1982.
Cooler than the station meanWarmer than the station mean
One stripe for each of 43 complete years at Coquitlam Lake, 1936 to 1980. Blue stripes are years cooler than the station's own mean of 8.4 C (47.2 F); red stripes are warmer. The coolest year was 1955, at 6.8 C (44.3 F), and the warmest was 1958, at 10.1 C (50.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Coquitlam Lake as warming stripes, 1936 to 1980
Year
Annual mean temperature
Difference from the station mean
1936
8.7 C
+0.23 C
1937
8.1 C
-0.37 C
1938
9.1 C
+0.70 C
1939
9.1 C
+0.70 C
1940
9.9 C
+1.49 C
1941
9.9 C
+1.46 C
1942
9.2 C
+0.72 C
1943
8.6 C
+0.15 C
1944
9.0 C
+0.56 C
1945
8.4 C
-0.06 C
1946
8.4 C
-0.07 C
1947
8.5 C
+0.04 C
1948
7.8 C
-0.69 C
1949
7.4 C
-1.05 C
1950
7.4 C
-1.06 C
1951
8.3 C
-0.19 C
1952
8.5 C
+0.08 C
1953
8.8 C
+0.36 C
1954
7.7 C
-0.79 C
1955
6.8 C
-1.61 C
1956
7.9 C
-0.59 C
1957
8.0 C
-0.48 C
1958
10.1 C
+1.69 C
1959
8.2 C
-0.28 C
1960
8.3 C
-0.16 C
1961
8.8 C
+0.37 C
1962
8.3 C
-0.14 C
1963
8.3 C
-0.10 C
1964
7.5 C
-0.91 C
1965
8.3 C
-0.13 C
1966
8.2 C
-0.26 C
1967
9.1 C
+0.69 C
1968
8.7 C
+0.21 C
1969
8.2 C
-0.28 C
1970
8.6 C
+0.12 C
1971
7.7 C
-0.78 C
1972
7.9 C
-0.58 C
1973
8.5 C
+0.06 C
1974
8.8 C
+0.34 C
1975
8.1 C
-0.34 C
1976
8.7 C
+0.24 C
1977
9.2 C
+0.78 C
1980
8.5 C
+0.03 C
The fitted trend in annual mean temperature here over 1936 to 1980 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.5 to 0.1) per decade. The slope is a straight line fitted to 43 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Coquitlam Lake
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.1) per decade
1936 to 1980
43
Not clearly different from zero
Mean daily maximum
-0.2 C (-0.4 to 0.1) per decade
-0.3 F (-0.7 to 0.1) per decade
1936 to 1980
43
Not clearly different from zero
Mean daily minimum
-0.04 C (-0.19 to 0.11) per decade
-0.1 F (-0.3 to 0.2) per decade
1936 to 1980
43
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
1924 to 1982
Yearly extremes at Coquitlam Lake: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.7 C (98.1 F)
1941
31.7 C (89.1 F)
48
Coldest night (TNn)
-18.9 C (-2.0 F)
1950
-10.0 C (14.0 F)
48
Wettest day (Rx1day)
203.2 mm (8.0 in)
1955
128.8 mm (5.1 in)
59
Wettest five days (Rx5day)
598.4 mm (23.6 in)
1935
300.0 mm (11.8 in)
59
Longest dry spell (CDD)
50 days
1960
21 days
59
Hottest day (TXx)
The hottest day of the year at Coquitlam Lake, 1924 to 1982. The record is 36.7 C (98.1 F) in 1941, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Coquitlam Lake by year
Year
Hottest day (TXx)
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
24.4 C (75.9 F)
1936
33.3 C (91.9 F)
1937
31.7 C (89.1 F)
1938
33.3 C (91.9 F)
1939
32.2 C (90.0 F)
1940
32.2 C (90.0 F)
1941
36.7 C (98.1 F)
1942
34.4 C (93.9 F)
1943
30.0 C (86.0 F)
1944
31.1 C (88.0 F)
1945
31.1 C (88.0 F)
1946
31.7 C (89.1 F)
1947
30.0 C (86.0 F)
1948
30.0 C (86.0 F)
1949
30.0 C (86.0 F)
1950
31.1 C (88.0 F)
1951
32.2 C (90.0 F)
1952
32.2 C (90.0 F)
1953
30.0 C (86.0 F)
1954
24.4 C (75.9 F)
1955
30.0 C (86.0 F)
1956
32.2 C (90.0 F)
1957
26.7 C (80.1 F)
1958
31.7 C (89.1 F)
1959
30.0 C (86.0 F)
1960
33.3 C (91.9 F)
1961
35.6 C (96.1 F)
1962
31.1 C (88.0 F)
1963
31.1 C (88.0 F)
1964
27.8 C (82.0 F)
1965
36.7 C (98.1 F)
1966
28.3 C (82.9 F)
1967
33.3 C (91.9 F)
1968
30.6 C (87.1 F)
1969
31.1 C (88.0 F)
1970
31.7 C (89.1 F)
1971
32.8 C (91.0 F)
1972
31.1 C (88.0 F)
1973
32.8 C (91.0 F)
1974
34.4 C (93.9 F)
1975
30.6 C (87.1 F)
1976
28.9 C (84.0 F)
1977
33.9 C (93.0 F)
1978
35.0 C (95.0 F)
1979
33.0 C (91.4 F)
1980
30.0 C (86.0 F)
1981
35.5 C (95.9 F)
1982
34.0 C (93.2 F)
Coldest night (TNn)
The coldest night of the year at Coquitlam Lake, 1924 to 1982. The record is -18.9 C (-2.0 F) in 1950, marked on the chart; the median year is -10.0 C (14.0 F).
Coldest night (TNn) at Coquitlam Lake by year
Year
Coldest night (TNn)
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
-5.6 C (21.9 F)
1936
-16.1 C (3.0 F)
1937
-15.0 C (5.0 F)
1938
-5.6 C (21.9 F)
1939
-7.8 C (18.0 F)
1940
-5.6 C (21.9 F)
1941
-10.0 C (14.0 F)
1942
-8.3 C (17.1 F)
1943
-15.0 C (5.0 F)
1944
-6.7 C (19.9 F)
1945
-6.7 C (19.9 F)
1946
-7.8 C (18.0 F)
1947
-15.6 C (3.9 F)
1948
-8.9 C (16.0 F)
1949
-15.6 C (3.9 F)
1950
-18.9 C (-2.0 F)
1951
-12.2 C (10.0 F)
1952
-11.1 C (12.0 F)
1953
-3.3 C (26.1 F)
1954
-10.0 C (14.0 F)
1955
-17.8 C (0.0 F)
1956
-12.2 C (10.0 F)
1957
-15.6 C (3.9 F)
1958
-4.4 C (24.1 F)
1959
-13.3 C (8.1 F)
1960
-6.1 C (21.0 F)
1961
-8.9 C (16.0 F)
1962
-16.7 C (1.9 F)
1963
-12.8 C (9.0 F)
1964
-16.7 C (1.9 F)
1965
-5.6 C (21.9 F)
1966
-5.6 C (21.9 F)
1967
-8.9 C (16.0 F)
1968
-18.9 C (-2.0 F)
1969
-17.8 C (0.0 F)
1970
-7.2 C (19.0 F)
1971
-9.4 C (15.1 F)
1972
-12.2 C (10.0 F)
1973
-10.0 C (14.0 F)
1974
-10.6 C (12.9 F)
1975
-7.8 C (18.0 F)
1976
-7.2 C (19.0 F)
1977
-7.8 C (18.0 F)
1978
-14.0 C (6.8 F)
1979
-14.0 C (6.8 F)
1980
-14.0 C (6.8 F)
1981
-8.0 C (17.6 F)
1982
-14.0 C (6.8 F)
Wettest day (Rx1day)
The wettest day of the year at Coquitlam Lake, 1924 to 1982. The record is 203.2 mm (8.0 in) in 1955, marked on the chart; the median year is 128.8 mm (5.1 in).
Wettest day (Rx1day) at Coquitlam Lake by year
Year
Wettest day (Rx1day)
1924
146.1 mm (5.8 in)
1925
156.0 mm (6.1 in)
1926
76.7 mm (3.0 in)
1927
113.8 mm (4.5 in)
1928
92.7 mm (3.6 in)
1929
118.6 mm (4.7 in)
1930
140.2 mm (5.5 in)
1931
199.6 mm (7.9 in)
1932
128.0 mm (5.0 in)
1933
168.1 mm (6.6 in)
1934
113.8 mm (4.5 in)
1935
148.1 mm (5.8 in)
1936
101.1 mm (4.0 in)
1937
118.6 mm (4.7 in)
1938
112.3 mm (4.4 in)
1939
119.9 mm (4.7 in)
1940
172.2 mm (6.8 in)
1941
144.3 mm (5.7 in)
1942
83.8 mm (3.3 in)
1943
105.2 mm (4.1 in)
1944
111.8 mm (4.4 in)
1945
148.6 mm (5.9 in)
1946
127.8 mm (5.0 in)
1947
143.5 mm (5.6 in)
1948
117.3 mm (4.6 in)
1949
120.9 mm (4.8 in)
1950
128.3 mm (5.1 in)
1951
144.8 mm (5.7 in)
1952
85.6 mm (3.4 in)
1953
114.3 mm (4.5 in)
1954
152.4 mm (6.0 in)
1955
203.2 mm (8.0 in)
1956
114.3 mm (4.5 in)
1957
95.3 mm (3.8 in)
1958
90.4 mm (3.6 in)
1959
145.5 mm (5.7 in)
1960
90.2 mm (3.6 in)
1961
180.3 mm (7.1 in)
1962
194.3 mm (7.6 in)
1963
152.4 mm (6.0 in)
1964
151.1 mm (5.9 in)
1965
134.6 mm (5.3 in)
1966
194.3 mm (7.6 in)
1967
175.5 mm (6.9 in)
1968
190.5 mm (7.5 in)
1969
73.7 mm (2.9 in)
1970
142.7 mm (5.6 in)
1971
115.8 mm (4.6 in)
1972
128.8 mm (5.1 in)
1973
176.5 mm (6.9 in)
1974
151.1 mm (5.9 in)
1975
139.7 mm (5.5 in)
1976
111.8 mm (4.4 in)
1977
119.4 mm (4.7 in)
1978
73.0 mm (2.9 in)
1979
148.0 mm (5.8 in)
1980
134.8 mm (5.3 in)
1981
154.4 mm (6.1 in)
1982
70.2 mm (2.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Coquitlam Lake, 1924 to 1982. The record is 598.4 mm (23.6 in) in 1935, marked on the chart; the median year is 300.0 mm (11.8 in).
Wettest five days (Rx5day) at Coquitlam Lake by year
Year
Wettest five days (Rx5day)
1924
368.9 mm (14.5 in)
1925
269.1 mm (10.6 in)
1926
189.0 mm (7.4 in)
1927
217.9 mm (8.6 in)
1928
315.7 mm (12.4 in)
1929
324.7 mm (12.8 in)
1930
291.4 mm (11.5 in)
1931
386.8 mm (15.2 in)
1932
400.7 mm (15.8 in)
1933
317.7 mm (12.5 in)
1934
335.8 mm (13.2 in)
1935
598.4 mm (23.6 in)
1936
249.0 mm (9.8 in)
1937
264.0 mm (10.4 in)
1938
380.8 mm (15.0 in)
1939
387.3 mm (15.2 in)
1940
313.4 mm (12.3 in)
1941
315.4 mm (12.4 in)
1942
159.2 mm (6.3 in)
1943
246.4 mm (9.7 in)
1944
256.1 mm (10.1 in)
1945
253.7 mm (10.0 in)
1946
314.6 mm (12.4 in)
1947
435.4 mm (17.1 in)
1948
285.6 mm (11.2 in)
1949
307.1 mm (12.1 in)
1950
300.0 mm (11.8 in)
1951
367.3 mm (14.5 in)
1952
191.8 mm (7.6 in)
1953
270.5 mm (10.6 in)
1954
362.0 mm (14.3 in)
1955
386.6 mm (15.2 in)
1956
232.9 mm (9.2 in)
1957
203.3 mm (8.0 in)
1958
227.1 mm (8.9 in)
1959
385.5 mm (15.2 in)
1960
214.7 mm (8.5 in)
1961
415.3 mm (16.4 in)
1962
429.3 mm (16.9 in)
1963
455.2 mm (17.9 in)
1964
288.2 mm (11.3 in)
1965
285.0 mm (11.2 in)
1966
442.2 mm (17.4 in)
1967
384.1 mm (15.1 in)
1968
479.9 mm (18.9 in)
1969
225.8 mm (8.9 in)
1970
363.1 mm (14.3 in)
1971
251.5 mm (9.9 in)
1972
367.1 mm (14.5 in)
1973
260.4 mm (10.3 in)
1974
318.2 mm (12.5 in)
1975
299.7 mm (11.8 in)
1976
266.0 mm (10.5 in)
1977
246.9 mm (9.7 in)
1978
193.8 mm (7.6 in)
1979
200.0 mm (7.9 in)
1980
287.5 mm (11.3 in)
1981
349.6 mm (13.8 in)
1982
135.2 mm (5.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Coquitlam Lake, 1924 to 1982. The record is 50 days in 1960, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Coquitlam Lake by year
Year
Longest dry spell (CDD)
1924
19 days
1925
21 days
1926
14 days
1927
18 days
1928
38 days
1929
23 days
1930
23 days
1931
22 days
1932
16 days
1933
13 days
1934
30 days
1935
24 days
1936
39 days
1937
36 days
1938
21 days
1939
38 days
1940
32 days
1941
22 days
1942
37 days
1943
20 days
1944
19 days
1945
16 days
1946
22 days
1947
21 days
1948
12 days
1949
15 days
1950
19 days
1951
38 days
1952
20 days
1953
20 days
1954
11 days
1955
21 days
1956
26 days
1957
18 days
1958
34 days
1959
16 days
1960
50 days
1961
26 days
1962
15 days
1963
28 days
1964
10 days
1965
26 days
1966
15 days
1967
20 days
1968
23 days
1969
22 days
1970
24 days
1971
20 days
1972
33 days
1973
22 days
1974
20 days
1975
16 days
1976
16 days
1977
24 days
1978
14 days
1979
32 days
1980
12 days
1981
20 days
1982
19 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
43 years with a frost
Across 43 years with a frost, the median last spring frost at Coquitlam Lake falls on 26 April and the median first autumn frost on 2 November, which leaves a median of 190 days between them.
Fitted over all years, the growing season changes by -7.6 days per decade at this station.
Frost dates and growing season at Coquitlam Lake
Measure
Median, all years
Earliest period
Recent period (1949 to 1980)
Recent against earliest
Fitted trend
Last spring frost
26 April
n/a
29 April
n/a
+6.2 days per decade
First autumn frost
2 November
n/a
29 October
n/a
-1.4 days per decade
Growing days
190 days
n/a
184 days
n/a
-7.6 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
57 years, 1924 to 1980
A day with at least 131.1 mm (5.2 in) of rain is expected about once in 2 years. A day with at least 215.8 mm (8.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Coquitlam 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
131.1 mm (5.2 in)
5 years
160.8 mm (6.3 in)
10 years
177.2 mm (7.0 in)
25 years
194.9 mm (7.7 in)
50 years
206.0 mm (8.1 in)
100 years
215.8 mm (8.5 in)
Longer than the 57 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, 57 years of values from 1924 to 1980.
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: 203.2 mm (8.0 in) in 1955; 199.6 mm (7.9 in) in 1931; 194.3 mm (7.6 in) in 1962.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Coquitlam Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Coquitlam 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.