Lake Cowichan Weather Records (CA001012055)

Record envelope, standing records and threshold days for Lake Cowichan (CA001012055), British Columbia, Canada, with 65 years of record.

Key Facts for Lake Cowichan

Lake Cowichan (CA001012055) is a weather station in British Columbia, Canada at 48.83 latitude and -124.05 longitude, 171 m (561 ft) above sea level.
The station reports from 1960 to 2024, 65 years of record.
1,464 records set at Lake Cowichan still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: British Columbia, Canada, 48.83 latitude, -124.05 longitude.
Elevation: 171 m (561 ft).
Period of record: 1960 to 2024, 65 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Lake Cowichan. 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 Lake Cowichan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.9 C (57.0 F)	-13.9 C (7.0 F)	n/a	n/a
Feb	17.8 C (64.0 F)	-11.7 C (10.9 F)	n/a	n/a
Mar	20.0 C (68.0 F)	-9.4 C (15.1 F)	n/a	n/a
Apr	24.4 C (75.9 F)	-7.0 C (19.4 F)	n/a	n/a
May	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jun	35.6 C (96.1 F)	1.1 C (34.0 F)	n/a	n/a
Jul	36.1 C (97.0 F)	3.9 C (39.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	2.8 C (37.0 F)	n/a	n/a
Sep	32.8 C (91.0 F)	-1.7 C (28.9 F)	n/a	n/a
Oct	25.6 C (78.1 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	19.4 C (66.9 F)	-8.9 C (16.0 F)	n/a	n/a
Dec	13.9 C (57.0 F)	-15.0 C (5.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lake Cowichan still stand. 1962 holds the most, with 109.

Standing records at Lake Cowichan by the year they were set
Year set	Standing records
1960	29
1961	83
1962	109
1963	75
1964	60
1965	71
1966	64
1967	55
1968	69
1969	98
1970	60
1971	65
1972	89
1973	70
1974	62
1975	61
1976	55
1977	38
1978	39
1979	44
1980	18
1981	30
1982	40
1983	80

Wettest Day of Each Month

Dec: 181.9 mm (7.2 in)

The wettest day on record for each calendar month at Lake Cowichan. The most was 181.9 mm (7.2 in) on 21 December 1967.

Record daily precipitation for each month at Lake Cowichan
Month	Record daily precipitation (mm)	Date
Jan	145.5 mm (5.7 in)	14 January 1961
Feb	87.6 mm (3.4 in)	27 February 1967
Mar	82.8 mm (3.3 in)	9 March 1974
Apr	102.4 mm (4.0 in)	8 April 1970
May	91.7 mm (3.6 in)	23 May 1973
Jun	51.3 mm (2.0 in)	24 June 1971
Jul	43.4 mm (1.7 in)	16 July 1974
Aug	38.1 mm (1.5 in)	30 August 1961
Sep	101.6 mm (4.0 in)	20 September 1972
Oct	100.1 mm (3.9 in)	21 October 1963
Nov	105.6 mm (4.2 in)	14 November 1983
Dec	181.9 mm (7.2 in)	21 December 1967

Period of Record Coverage

1960 to 1983

24 years of record at Lake Cowichan, 1960 to 1983. 6 years have data for under 90 percent of days and are left out of rankings: 1960, 1977, 1979, 1980, 1981, 1982.

Days with data per year at Lake Cowichan
Year	Days with data	Share of year	Complete
1960	153	42%	No
1961	361	99%	Yes
1962	365	100%	Yes
1963	364	100%	Yes
1964	366	100%	Yes
1965	361	99%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	361	99%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	363	99%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	304	83%	No
1978	365	100%	Yes
1979	249	68%	No
1980	191	52%	No
1981	209	57%	No
1982	237	65%	No
1983	365	100%	Yes

Latest Records

No records were set at this station in the latest data.

Climate Trend

17 complete years, 1961 to 1983

One stripe for each of 17 complete years at Lake Cowichan, 1961 to 1983. Blue stripes are years cooler than the station's own mean of 9.2 C (48.5 F); red stripes are warmer. The coolest year was 1964, at 8.5 C (47.2 F), and the warmest was 1967, at 10.0 C (49.9 F). The strongest colour marks a difference of 0.8 C (1.4 F).

Annual mean temperature at Lake Cowichan as warming stripes, 1961 to 1983
Year	Annual mean temperature	Difference from the station mean
1961	9.7 C	+0.53 C
1962	9.5 C	+0.30 C
1963	9.7 C	+0.56 C
1964	8.5 C	-0.71 C
1965	9.4 C	+0.23 C
1966	9.1 C	-0.04 C
1967	10.0 C	+0.77 C
1968	9.3 C	+0.10 C
1969	9.0 C	-0.23 C
1970	9.1 C	-0.08 C
1971	8.6 C	-0.63 C
1972	8.5 C	-0.69 C
1973	9.0 C	-0.20 C
1975	8.6 C	-0.55 C
1976	9.0 C	-0.14 C
1978	9.6 C	+0.41 C
1983	9.5 C	+0.35 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

1960 to 1983

Yearly extremes at Lake Cowichan: 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)	1965	33.7 C (92.7 F)	24
Coldest night (TNn)	-15.0 C (5.0 F)	1968	-9.5 C (14.9 F)	24
Wettest day (Rx1day)	181.9 mm (7.2 in)	1967	77.8 mm (3.1 in)	24
Wettest five days (Rx5day)	296.4 mm (11.7 in)	1974	201.3 mm (7.9 in)	24
Longest dry spell (CDD)	47 days	1974	26 days	24

Hottest day (TXx)

The hottest day of the year at Lake Cowichan, 1960 to 1983. The record is 36.7 C (98.1 F) in 1965, marked on the chart; the median year is 33.7 C (92.7 F).

Hottest day (TXx) at Lake Cowichan by year
Year	Hottest day (TXx)
1960	35.0 C (95.0 F)
1961	33.9 C (93.0 F)
1962	31.1 C (88.0 F)
1963	31.1 C (88.0 F)
1964	29.4 C (84.9 F)
1965	36.7 C (98.1 F)
1966	32.2 C (90.0 F)
1967	35.0 C (95.0 F)
1968	32.2 C (90.0 F)
1969	35.6 C (96.1 F)
1970	32.2 C (90.0 F)
1971	33.9 C (93.0 F)
1972	33.9 C (93.0 F)
1973	32.8 C (91.0 F)
1974	33.9 C (93.0 F)
1975	31.7 C (89.1 F)
1976	27.8 C (82.0 F)
1977	35.0 C (95.0 F)
1978	35.6 C (96.1 F)
1979	33.0 C (91.4 F)
1980	30.5 C (86.9 F)
1981	35.5 C (95.9 F)
1982	33.5 C (92.3 F)
1983	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Lake Cowichan, 1960 to 1983. The record is -15.0 C (5.0 F) in 1968, marked on the chart; the median year is -9.5 C (14.9 F).

Coldest night (TNn) at Lake Cowichan by year
Year	Coldest night (TNn)
1960	-5.0 C (23.0 F)
1961	-6.7 C (19.9 F)
1962	-11.1 C (12.0 F)
1963	-10.0 C (14.0 F)
1964	-14.4 C (6.1 F)
1965	-6.1 C (21.0 F)
1966	-6.1 C (21.0 F)
1967	-5.6 C (21.9 F)
1968	-15.0 C (5.0 F)
1969	-13.9 C (7.0 F)
1970	-7.2 C (19.0 F)
1971	-11.1 C (12.0 F)
1972	-13.9 C (7.0 F)
1973	-12.2 C (10.0 F)
1974	-12.2 C (10.0 F)
1975	-7.2 C (19.0 F)
1976	-8.3 C (17.1 F)
1977	-8.9 C (16.0 F)
1978	-13.3 C (8.1 F)
1979	-11.7 C (10.9 F)
1980	0.0 C (32.0 F)
1981	-7.0 C (19.4 F)
1982	-9.0 C (15.8 F)
1983	-14.5 C (5.9 F)

Wettest day (Rx1day)

The wettest day of the year at Lake Cowichan, 1960 to 1983. The record is 181.9 mm (7.2 in) in 1967, marked on the chart; the median year is 77.8 mm (3.1 in).

Wettest day (Rx1day) at Lake Cowichan by year
Year	Wettest day (Rx1day)
1960	67.1 mm (2.6 in)
1961	145.5 mm (5.7 in)
1962	83.6 mm (3.3 in)
1963	100.8 mm (4.0 in)
1964	71.9 mm (2.8 in)
1965	69.9 mm (2.8 in)
1966	90.4 mm (3.6 in)
1967	181.9 mm (7.2 in)
1968	102.9 mm (4.1 in)
1969	69.1 mm (2.7 in)
1970	102.4 mm (4.0 in)
1971	68.1 mm (2.7 in)
1972	101.6 mm (4.0 in)
1973	91.7 mm (3.6 in)
1974	97.3 mm (3.8 in)
1975	98.8 mm (3.9 in)
1976	58.4 mm (2.3 in)
1977	69.1 mm (2.7 in)
1978	52.1 mm (2.1 in)
1979	59.0 mm (2.3 in)
1980	49.0 mm (1.9 in)
1981	44.0 mm (1.7 in)
1982	71.8 mm (2.8 in)
1983	105.6 mm (4.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lake Cowichan, 1960 to 1983. The record is 296.4 mm (11.7 in) in 1974, marked on the chart; the median year is 201.3 mm (7.9 in).

Wettest five days (Rx5day) at Lake Cowichan by year
Year	Wettest five days (Rx5day)
1960	151.0 mm (5.9 in)
1961	268.7 mm (10.6 in)
1962	226.3 mm (8.9 in)
1963	270.5 mm (10.6 in)
1964	182.6 mm (7.2 in)
1965	155.4 mm (6.1 in)
1966	197.4 mm (7.8 in)
1967	247.2 mm (9.7 in)
1968	276.1 mm (10.9 in)
1969	183.7 mm (7.2 in)
1970	205.2 mm (8.1 in)
1971	144.9 mm (5.7 in)
1972	235.7 mm (9.3 in)
1973	205.4 mm (8.1 in)
1974	296.4 mm (11.7 in)
1975	222.5 mm (8.8 in)
1976	133.9 mm (5.3 in)
1977	166.0 mm (6.5 in)
1978	126.2 mm (5.0 in)
1979	182.2 mm (7.2 in)
1980	134.3 mm (5.3 in)
1981	83.5 mm (3.3 in)
1982	219.6 mm (8.6 in)
1983	247.4 mm (9.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lake Cowichan, 1960 to 1983. The record is 47 days in 1974, marked on the chart; the median year is 26 days.

Longest dry spell (CDD) at Lake Cowichan by year
Year	Longest dry spell (CDD)
1960	30 days
1961	29 days
1962	22 days
1963	28 days
1964	11 days
1965	21 days
1966	14 days
1967	32 days
1968	23 days
1969	31 days
1970	24 days
1971	21 days
1972	32 days
1973	22 days
1974	47 days
1975	32 days
1976	14 days
1977	34 days
1978	42 days
1979	36 days
1980	13 days
1981	41 days
1982	19 days
1983	24 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.

Download the Data

Data for Lake Cowichan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lake Cowichan 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).