Cortes Island Weather Records (CA001021950)
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| 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 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)| 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| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1947 | 305 | 84% | No |
| 1948 | 31 | 8% | No |
| 1952 | 341 | 93% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 224 | 61% | No |
| 1955 | 169 | 46% | No |
| 1956 | 299 | 82% | No |
| 1957 | 245 | 67% | No |
| 1958 | 349 | 96% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 336 | 92% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 24 December 1983 | Cortes Island, CA | daily low min | -8.5 C (16.7 F) | 3.5 C (6.3 F) | 18 years | 19 of 100 (Routine) |
| 23 December 1983 | Cortes Island, CA | daily low max | -4.5 C (23.9 F) | 2.8 C (5.0 F) | 12 years | 14 of 100 (Routine) |
| 23 December 1983 | Cortes Island, CA | daily low min | -7.0 C (19.4 F) | 0.9 C (1.6 F) | 18 years | 10 of 100 (Routine) |
| 22 December 1983 | Cortes Island, CA | daily low min | -6.5 C (20.3 F) | 2.1 C (3.8 F) | 18 years | 14 of 100 (Routine) |
| 22 December 1983 | Cortes Island, CA | daily low max | -2.5 C (27.5 F) | 0.8 C (1.4 F) | 18 years | 10 of 100 (Routine) |
| 21 December 1983 | Cortes Island, CA | daily low min | -6.5 C (20.3 F) | 3.7 C (6.7 F) | 12 years | 17 of 100 (Routine) |
| 20 December 1983 | Cortes Island, CA | daily low min | -7.5 C (18.5 F) | 2.5 C (4.5 F) | 16 years | 14 of 100 (Routine) |
| 1 December 1983 | Cortes Island, CA | daily low min | -2.5 C (27.5 F) | 1.9 C (3.4 F) | 28 years | 17 of 100 (Routine) |
| 17 November 1983 | Cortes Island, CA | daily high min | 8.0 C (46.4 F) | 1.9 C (3.4 F) | 28 years | 17 of 100 (Routine) |
| 16 November 1983 | Cortes Island, CA | daily high min | 8.5 C (47.3 F) | 1.3 C (2.3 F) | 28 years | 15 of 100 (Routine) |
| 15 November 1983 | Cortes Island, CA | daily high max | 12.0 C (53.6 F) | 0.9 C (1.6 F) | 29 years | 14 of 100 (Routine) |
| 14 November 1983 | Cortes Island, CA | daily rain | 48.6 mm (1.9 in) | 14.8 mm (0.6 in) | 8 years | 22 of 100 (Routine) |
| 10 November 1983 | Cortes Island, CA | daily rain | 29.6 mm (1.2 in) | 9.3 mm (0.37 in) | 29 years | 21 of 100 (Routine) |
| 3 November 1983 | Cortes Island, CA | daily rain | 25.0 mm (1.0 in) | 1.1 mm (0.04 in) | 18 years | 9 of 100 (Routine) |
| 2 November 1983 | Cortes Island, CA | daily high min (Tie) | 10.0 C (50.0 F) | tie | 1 year | 0 of 100 (Routine) |
| 26 October 1983 | Cortes Island, CA | daily rain | 20.4 mm (0.8 in) | 0.6 mm (0.02 in) | 21 years | 9 of 100 (Routine) |
| 3 October 1983 | Cortes Island, CA | daily low max | 11.5 C (52.7 F) | 0.2 C (0.4 F) | 29 years | 11 of 100 (Routine) |
| 2 October 1983 | Cortes Island, CA | daily low max | 11.0 C (51.8 F) | 1.0 C (1.8 F) | 1 year | 6 of 100 (Routine) |
| 30 September 1983 | Cortes Island, CA | daily low min | 5.0 C (41.0 F) | 0.6 C (1.1 F) | 12 years | 8 of 100 (Routine) |
| 17 September 1983 | Cortes Island, CA | daily low max | 13.5 C (56.3 F) | 0.5 C (0.9 F) | 5 years | 5 of 100 (Routine) |
Climate Trend
26 complete years, 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| 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)
| 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)
| 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)
| 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)
| 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)
| 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 frostAcross 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.
| 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
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).