Record envelope, standing records and threshold days for Cortes Island (CA001021950), British Columbia, Canada, with 49 years of record.
Key Facts for Cortes Island
Cortes Island (CA001021950) is a weather station in British Columbia, Canada at 50.08 latitude and -125.03 longitude, 6 m (20 ft) above sea level.
The station reports from 1947 to 1995, 49 years of record.
1,464 records set at Cortes Island still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Cortes Island set a daily record low minimum temperature of -8.5 C (16.7 F) on 24 December 1983.
About the Station
Location: British Columbia, Canada, 50.08 latitude, -125.03 longitude.
Elevation: 6 m (20 ft).
Period of record: 1947 to 1995, 49 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 Cortes Island. 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 Cortes Island, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.0 C (59.0 F)
-10.6 C (12.9 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-8.3 C (17.1 F)
n/a
n/a
Mar
19.4 C (66.9 F)
-6.1 C (21.0 F)
n/a
n/a
Apr
23.3 C (73.9 F)
-1.1 C (30.0 F)
n/a
n/a
May
31.5 C (88.7 F)
1.7 C (35.1 F)
n/a
n/a
Jun
31.1 C (88.0 F)
2.8 C (37.0 F)
n/a
n/a
Jul
31.7 C (89.1 F)
5.0 C (41.0 F)
n/a
n/a
Aug
32.5 C (90.5 F)
7.8 C (46.0 F)
n/a
n/a
Sep
27.2 C (81.0 F)
2.2 C (36.0 F)
n/a
n/a
Oct
21.1 C (70.0 F)
-1.1 C (30.0 F)
n/a
n/a
Nov
16.0 C (60.8 F)
-5.0 C (23.0 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-13.9 C (7.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Cortes Island still stand. 1947 holds the most, with 84.
Standing records at Cortes Island by the year they were set
Year set
Standing records
1947
84
1948
1
1952
61
1953
27
1954
49
1955
37
1956
56
1957
36
1958
75
1959
39
1960
45
1961
38
1962
42
1963
44
1964
42
1965
56
1966
31
1967
60
1968
58
1969
50
1970
29
1971
44
1972
48
1973
41
1974
42
1975
30
1976
40
1977
41
1978
27
1979
29
1980
46
1981
36
1982
32
1983
48
Wettest Day of Each Month
Dec: 77.7 mm (3.1 in)
The wettest day on record for each calendar month at Cortes Island. The most was 77.7 mm (3.1 in) on 22 December 1957.
Record daily precipitation for each month at Cortes Island
Month
Record daily precipitation (mm)
Date
Jan
54.4 mm (2.1 in)
29 January 1971
Feb
71.9 mm (2.8 in)
25 February 1957
Mar
39.4 mm (1.6 in)
17 March 1972
Apr
40.9 mm (1.6 in)
14 April 1963
May
40.6 mm (1.6 in)
11 May 1955
Jun
58.4 mm (2.3 in)
25 June 1963
Jul
46.2 mm (1.8 in)
22 July 1952
Aug
40.6 mm (1.6 in)
24 August 1977
Sep
50.3 mm (2.0 in)
26 September 1962
Oct
50.5 mm (2.0 in)
27 October 1973
Nov
48.8 mm (1.9 in)
30 November 1966
Dec
77.7 mm (3.1 in)
22 December 1957
Period of Record Coverage
1947 to 1983
Complete yearUnder 90 percent of days
34 years of record at Cortes Island, 1947 to 1983. 6 years have data for under 90 percent of days and are left out of rankings: 1947, 1948, 1954, 1955, 1956, 1957.
Cooler than the station meanWarmer than the station mean
One stripe for each of 26 complete years at Cortes Island, 1953 to 1983. Blue stripes are years cooler than the station's own mean of 9.8 C (49.7 F); red stripes are warmer. The coolest year was 1964, at 9.0 C (48.3 F), and the warmest was 1958, at 11.3 C (52.3 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Cortes Island as warming stripes, 1953 to 1983
Year
Annual mean temperature
Difference from the station mean
1953
10.3 C
+0.46 C
1958
11.3 C
+1.44 C
1959
9.4 C
-0.46 C
1960
9.5 C
-0.36 C
1961
10.0 C
+0.11 C
1962
9.8 C
-0.07 C
1963
10.2 C
+0.34 C
1964
9.0 C
-0.81 C
1965
9.7 C
-0.11 C
1966
9.9 C
+0.10 C
1967
10.6 C
+0.73 C
1968
9.9 C
+0.03 C
1969
9.3 C
-0.57 C
1970
9.8 C
0.00 C
1971
9.3 C
-0.54 C
1972
9.2 C
-0.66 C
1973
9.5 C
-0.34 C
1974
9.8 C
-0.01 C
1975
9.2 C
-0.64 C
1976
9.4 C
-0.40 C
1977
9.8 C
-0.05 C
1978
10.0 C
+0.13 C
1979
10.3 C
+0.44 C
1981
10.5 C
+0.66 C
1982
9.7 C
-0.10 C
1983
10.6 C
+0.72 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1947 to 1983
Yearly extremes at Cortes Island: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
32.5 C (90.5 F)
1978
29.0 C (84.1 F)
34
Coldest night (TNn)
-13.9 C (7.0 F)
1968
-6.1 C (21.0 F)
34
Wettest day (Rx1day)
77.7 mm (3.1 in)
1957
43.0 mm (1.7 in)
35
Wettest five days (Rx5day)
142.8 mm (5.6 in)
1982
95.7 mm (3.8 in)
35
Longest dry spell (CDD)
35 days
1977
22 days
35
Hottest day (TXx)
The hottest day of the year at Cortes Island, 1947 to 1983. The record is 32.5 C (90.5 F) in 1978, marked on the chart; the median year is 29.0 C (84.1 F).
Hottest day (TXx) at Cortes Island by year
Year
Hottest day (TXx)
1947
28.9 C (84.0 F)
1948
8.3 C (46.9 F)
1949
n/a
1952
30.6 C (87.1 F)
1953
27.8 C (82.0 F)
1954
25.0 C (77.0 F)
1955
27.2 C (81.0 F)
1956
31.1 C (88.0 F)
1957
28.3 C (82.9 F)
1958
31.1 C (88.0 F)
1959
30.0 C (86.0 F)
1960
31.1 C (88.0 F)
1961
31.7 C (89.1 F)
1962
27.2 C (81.0 F)
1963
26.7 C (80.1 F)
1964
24.4 C (75.9 F)
1965
31.1 C (88.0 F)
1966
28.9 C (84.0 F)
1967
28.9 C (84.0 F)
1968
28.3 C (82.9 F)
1969
30.0 C (86.0 F)
1970
30.6 C (87.1 F)
1971
31.1 C (88.0 F)
1972
30.0 C (86.0 F)
1973
27.8 C (82.0 F)
1974
27.2 C (81.0 F)
1975
28.9 C (84.0 F)
1976
23.9 C (75.0 F)
1977
32.0 C (89.6 F)
1978
32.5 C (90.5 F)
1979
28.5 C (83.3 F)
1980
29.0 C (84.2 F)
1981
31.0 C (87.8 F)
1982
30.0 C (86.0 F)
1983
31.5 C (88.7 F)
Coldest night (TNn)
The coldest night of the year at Cortes Island, 1947 to 1983. The record is -13.9 C (7.0 F) in 1968, marked on the chart; the median year is -6.1 C (21.0 F).
Coldest night (TNn) at Cortes Island by year
Year
Coldest night (TNn)
1947
-1.7 C (28.9 F)
1948
-3.3 C (26.1 F)
1949
n/a
1952
-7.8 C (18.0 F)
1953
-3.3 C (26.1 F)
1954
-8.9 C (16.0 F)
1955
-5.6 C (21.9 F)
1956
-8.3 C (17.1 F)
1957
-9.4 C (15.1 F)
1958
-5.0 C (23.0 F)
1959
-8.3 C (17.1 F)
1960
-6.1 C (21.0 F)
1961
-3.3 C (26.1 F)
1962
-6.1 C (21.0 F)
1963
-5.6 C (21.9 F)
1964
-10.0 C (14.0 F)
1965
-4.4 C (24.1 F)
1966
-6.7 C (19.9 F)
1967
-5.0 C (23.0 F)
1968
-13.9 C (7.0 F)
1969
-10.6 C (12.9 F)
1970
-5.0 C (23.0 F)
1971
-8.3 C (17.1 F)
1972
-8.3 C (17.1 F)
1973
-6.1 C (21.0 F)
1974
-4.4 C (24.1 F)
1975
-5.0 C (23.0 F)
1976
-4.4 C (24.1 F)
1977
-5.0 C (23.0 F)
1978
-8.0 C (17.6 F)
1979
-4.5 C (23.9 F)
1980
-9.0 C (15.8 F)
1981
-3.5 C (25.7 F)
1982
-10.0 C (14.0 F)
1983
-8.5 C (16.7 F)
Wettest day (Rx1day)
The wettest day of the year at Cortes Island, 1947 to 1983. The record is 77.7 mm (3.1 in) in 1957, marked on the chart; the median year is 43.0 mm (1.7 in).
Wettest day (Rx1day) at Cortes Island by year
Year
Wettest day (Rx1day)
1947
47.2 mm (1.9 in)
1948
33.5 mm (1.3 in)
1949
33.5 mm (1.3 in)
1952
57.7 mm (2.3 in)
1953
31.2 mm (1.2 in)
1954
41.7 mm (1.6 in)
1955
40.6 mm (1.6 in)
1956
47.2 mm (1.9 in)
1957
77.7 mm (3.1 in)
1958
41.1 mm (1.6 in)
1959
46.7 mm (1.8 in)
1960
37.6 mm (1.5 in)
1961
37.6 mm (1.5 in)
1962
50.3 mm (2.0 in)
1963
58.4 mm (2.3 in)
1964
46.0 mm (1.8 in)
1965
50.0 mm (2.0 in)
1966
48.8 mm (1.9 in)
1967
37.8 mm (1.5 in)
1968
60.7 mm (2.4 in)
1969
39.4 mm (1.6 in)
1970
31.0 mm (1.2 in)
1971
54.4 mm (2.1 in)
1972
39.4 mm (1.6 in)
1973
50.5 mm (2.0 in)
1974
45.7 mm (1.8 in)
1975
41.4 mm (1.6 in)
1976
31.8 mm (1.3 in)
1977
40.6 mm (1.6 in)
1978
48.4 mm (1.9 in)
1979
43.0 mm (1.7 in)
1980
36.0 mm (1.4 in)
1981
72.8 mm (2.9 in)
1982
43.0 mm (1.7 in)
1983
48.6 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Cortes Island, 1947 to 1983. The record is 142.8 mm (5.6 in) in 1982, marked on the chart; the median year is 95.7 mm (3.8 in).
Wettest five days (Rx5day) at Cortes Island by year
Year
Wettest five days (Rx5day)
1947
93.0 mm (3.7 in)
1948
69.6 mm (2.7 in)
1949
48.0 mm (1.9 in)
1952
92.5 mm (3.6 in)
1953
102.3 mm (4.0 in)
1954
110.3 mm (4.3 in)
1955
70.8 mm (2.8 in)
1956
82.6 mm (3.3 in)
1957
124.9 mm (4.9 in)
1958
99.6 mm (3.9 in)
1959
122.9 mm (4.8 in)
1960
78.7 mm (3.1 in)
1961
85.7 mm (3.4 in)
1962
90.7 mm (3.6 in)
1963
114.2 mm (4.5 in)
1964
99.6 mm (3.9 in)
1965
84.6 mm (3.3 in)
1966
110.8 mm (4.4 in)
1967
100.2 mm (3.9 in)
1968
98.1 mm (3.9 in)
1969
95.7 mm (3.8 in)
1970
69.1 mm (2.7 in)
1971
113.8 mm (4.5 in)
1972
101.6 mm (4.0 in)
1973
94.5 mm (3.7 in)
1974
82.8 mm (3.3 in)
1975
100.0 mm (3.9 in)
1976
51.6 mm (2.0 in)
1977
113.0 mm (4.4 in)
1978
89.6 mm (3.5 in)
1979
93.4 mm (3.7 in)
1980
85.2 mm (3.4 in)
1981
106.4 mm (4.2 in)
1982
142.8 mm (5.6 in)
1983
127.8 mm (5.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Cortes Island, 1947 to 1983. The record is 35 days in 1977, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Cortes Island by year
Year
Longest dry spell (CDD)
1947
16 days
1948
14 days
1949
15 days
1952
28 days
1953
11 days
1954
16 days
1955
24 days
1956
28 days
1957
21 days
1958
34 days
1959
27 days
1960
33 days
1961
32 days
1962
21 days
1963
27 days
1964
8 days
1965
21 days
1966
13 days
1967
21 days
1968
16 days
1969
23 days
1970
21 days
1971
20 days
1972
34 days
1973
20 days
1974
32 days
1975
18 days
1976
12 days
1977
35 days
1978
31 days
1979
27 days
1980
26 days
1981
25 days
1982
22 days
1983
25 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
26 years with a frost
Across 26 years with a frost, the median last spring frost at Cortes Island falls on 18 March and the median first autumn frost on 17 November, which leaves a median of 247 days between them.
Fitted over all years, the growing season changes by +7.8 days per decade at this station.
Frost dates and growing season at Cortes Island
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
18 March
n/a
18 March
n/a
-8.5 days per decade
First autumn frost
17 November
n/a
17 November
n/a
-0.7 days per decade
Growing days
247 days
n/a
247 days
n/a
+7.8 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.
Download the Data
Data for Cortes Island standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cortes Island 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.