Williams Lake A Weather Records (CA001098940)

Record envelope, standing records and threshold days for Williams Lake A (CA001098940), British Columbia, Canada, with 53 years of record.

Key Facts for Williams Lake A

Williams Lake A (CA001098940) is a weather station in British Columbia, Canada at 52.18 latitude and -122.05 longitude, 940 m (3,084 ft) above sea level.
The station reports from 1960 to 2012, 53 years of record.
1,464 records set at Williams Lake A 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, 52.18 latitude, -122.05 longitude.
Elevation: 940 m (3,084 ft).
Period of record: 1960 to 2012, 53 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 Williams Lake A. 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 Williams Lake A, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	12.8 C (55.0 F)	-42.2 C (-44.0 F)	n/a	n/a
Feb	12.8 C (55.0 F)	-32.4 C (-26.3 F)	n/a	n/a
Mar	17.1 C (62.8 F)	-31.7 C (-25.1 F)	n/a	n/a
Apr	28.8 C (83.8 F)	-16.7 C (1.9 F)	n/a	n/a
May	34.5 C (94.1 F)	-5.6 C (21.9 F)	n/a	n/a
Jun	32.2 C (90.0 F)	-2.2 C (28.0 F)	n/a	n/a
Jul	34.4 C (93.9 F)	0.0 C (32.0 F)	n/a	n/a
Aug	33.3 C (91.9 F)	-1.7 C (28.9 F)	n/a	n/a
Sep	32.0 C (89.6 F)	-8.9 C (16.0 F)	n/a	n/a
Oct	23.8 C (74.8 F)	-16.7 C (1.9 F)	n/a	n/a
Nov	16.7 C (62.1 F)	-28.3 C (-18.9 F)	n/a	n/a
Dec	11.2 C (52.2 F)	-42.8 C (-45.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Williams Lake A still stand. 1965 holds the most, with 84.

Standing records at Williams Lake A by the year they were set
Year set	Standing records
1960	1
1961	81
1962	77
1963	68
1964	62
1965	84
1966	60
1967	64
1968	72
1969	82
1970	57
1971	74
1972	81
1973	74
1974	38
1975	67
1976	34
1977	47
1978	50
1979	60
1980	64
1981	59
1982	53
1983	55

Wettest Day of Each Month

Jan: 42.7 mm (1.7 in)

The wettest day on record for each calendar month at Williams Lake A. The most was 42.7 mm (1.7 in) on 7 January 1962.

Record daily precipitation for each month at Williams Lake A
Month	Record daily precipitation (mm)	Date
Jan	42.7 mm (1.7 in)	7 January 1962
Feb	14.2 mm (0.6 in)	2 February 1962
Mar	32.8 mm (1.3 in)	9 March 1980
Apr	24.9 mm (1.0 in)	13 April 1969
May	22.4 mm (0.9 in)	24 May 1967
Jun	26.2 mm (1.0 in)	17 June 1964
Jul	34.3 mm (1.4 in)	31 July 1964
Aug	29.7 mm (1.2 in)	6 August 1962
Sep	27.9 mm (1.1 in)	13 September 1969
Oct	37.3 mm (1.5 in)	20 October 1962
Nov	17.5 mm (0.7 in)	30 November 1972
Dec	17.8 mm (0.7 in)	1 December 1972

Period of Record Coverage

1960 to 1983

24 years of record at Williams Lake A, 1960 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1960.

Days with data per year at Williams Lake A
Year	Days with data	Share of year	Complete
1960	27	7%	No
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	350	96%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes

Latest Records

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

Climate Trend

23 complete years, 1961 to 1983

One stripe for each of 23 complete years at Williams Lake A, 1961 to 1983. Blue stripes are years cooler than the station's own mean of 3.9 C (39.1 F); red stripes are warmer. The coolest year was 1972, at 2.8 C (37.1 F), and the warmest was 1981, at 5.4 C (41.8 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Williams Lake A as warming stripes, 1961 to 1983
Year	Annual mean temperature	Difference from the station mean
1961	4.7 C	+0.80 C
1962	4.1 C	+0.18 C
1963	5.3 C	+1.33 C
1964	3.1 C	-0.86 C
1965	3.7 C	-0.20 C
1966	3.8 C	-0.13 C
1967	4.9 C	+0.95 C
1968	3.6 C	-0.30 C
1969	3.9 C	-0.02 C
1970	3.7 C	-0.26 C
1971	3.3 C	-0.64 C
1972	2.8 C	-1.11 C
1973	3.6 C	-0.30 C
1974	4.2 C	+0.28 C
1975	2.8 C	-1.11 C
1976	4.1 C	+0.19 C
1977	3.8 C	-0.13 C
1978	3.6 C	-0.30 C
1979	4.1 C	+0.20 C
1980	4.0 C	+0.05 C
1981	5.4 C	+1.50 C
1982	3.1 C	-0.82 C
1983	4.7 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

1960 to 1983

Yearly extremes at Williams Lake A: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	34.5 C (94.1 F)	1983	32.0 C (89.5 F)	24
Coldest night (TNn)	-42.8 C (-45.0 F)	1968	-33.7 C (-28.7 F)	24
Wettest day (Rx1day)	42.7 mm (1.7 in)	1962	19.6 mm (0.8 in)	24
Wettest five days (Rx5day)	69.1 mm (2.7 in)	1971	38.2 mm (1.5 in)	24
Longest dry spell (CDD)	41 days	1970	23 days	24

Hottest day (TXx)

The hottest day of the year at Williams Lake A, 1960 to 1983. The record is 34.5 C (94.1 F) in 1983, marked on the chart; the median year is 32.0 C (89.5 F).

Hottest day (TXx) at Williams Lake A by year
Year	Hottest day (TXx)
1960	4.4 C (39.9 F)
1961	33.9 C (93.0 F)
1962	30.0 C (86.0 F)
1963	30.0 C (86.0 F)
1964	28.3 C (82.9 F)
1965	32.8 C (91.0 F)
1966	30.6 C (87.1 F)
1967	32.8 C (91.0 F)
1968	30.6 C (87.1 F)
1969	32.2 C (90.0 F)
1970	31.7 C (89.1 F)
1971	34.4 C (93.9 F)
1972	31.1 C (88.0 F)
1973	31.7 C (89.1 F)
1974	32.2 C (90.0 F)
1975	33.9 C (93.0 F)
1976	27.2 C (81.0 F)
1977	33.1 C (91.6 F)
1978	32.5 C (90.5 F)
1979	33.6 C (92.5 F)
1980	27.0 C (80.6 F)
1981	33.3 C (91.9 F)
1982	31.6 C (88.9 F)
1983	34.5 C (94.1 F)

Coldest night (TNn)

The coldest night of the year at Williams Lake A, 1960 to 1983. The record is -42.8 C (-45.0 F) in 1968, marked on the chart; the median year is -33.7 C (-28.7 F).

Coldest night (TNn) at Williams Lake A by year
Year	Coldest night (TNn)
1960	-19.4 C (-2.9 F)
1961	-28.3 C (-18.9 F)
1962	-33.3 C (-27.9 F)
1963	-35.0 C (-31.0 F)
1964	-38.3 C (-36.9 F)
1965	-33.3 C (-27.9 F)
1966	-31.7 C (-25.1 F)
1967	-30.0 C (-22.0 F)
1968	-42.8 C (-45.0 F)
1969	-42.2 C (-44.0 F)
1970	-32.2 C (-26.0 F)
1971	-38.3 C (-36.9 F)
1972	-39.4 C (-38.9 F)
1973	-31.1 C (-24.0 F)
1974	-33.9 C (-29.0 F)
1975	-36.7 C (-34.1 F)
1976	-31.7 C (-25.1 F)
1977	-33.7 C (-28.7 F)
1978	-38.5 C (-37.3 F)
1979	-34.9 C (-30.8 F)
1980	-33.7 C (-28.7 F)
1981	-29.1 C (-20.4 F)
1982	-36.9 C (-34.4 F)
1983	-33.3 C (-27.9 F)

Wettest day (Rx1day)

The wettest day of the year at Williams Lake A, 1960 to 1983. The record is 42.7 mm (1.7 in) in 1962, marked on the chart; the median year is 19.6 mm (0.8 in).

Wettest day (Rx1day) at Williams Lake A by year
Year	Wettest day (Rx1day)
1960	6.9 mm (0.27 in)
1961	31.0 mm (1.2 in)
1962	42.7 mm (1.7 in)
1963	22.4 mm (0.9 in)
1964	34.3 mm (1.4 in)
1965	22.4 mm (0.9 in)
1966	18.8 mm (0.7 in)
1967	22.4 mm (0.9 in)
1968	13.2 mm (0.5 in)
1969	27.9 mm (1.1 in)
1970	14.0 mm (0.6 in)
1971	29.7 mm (1.2 in)
1972	17.8 mm (0.7 in)
1973	18.8 mm (0.7 in)
1974	12.2 mm (0.5 in)
1975	20.3 mm (0.8 in)
1976	15.7 mm (0.6 in)
1977	18.1 mm (0.7 in)
1978	17.5 mm (0.7 in)
1979	17.5 mm (0.7 in)
1980	32.8 mm (1.3 in)
1981	13.6 mm (0.5 in)
1982	22.2 mm (0.9 in)
1983	26.2 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Williams Lake A, 1960 to 1983. The record is 69.1 mm (2.7 in) in 1971, marked on the chart; the median year is 38.2 mm (1.5 in).

Wettest five days (Rx5day) at Williams Lake A by year
Year	Wettest five days (Rx5day)
1960	14.1 mm (0.6 in)
1961	42.5 mm (1.7 in)
1962	66.0 mm (2.6 in)
1963	45.6 mm (1.8 in)
1964	66.5 mm (2.6 in)
1965	39.8 mm (1.6 in)
1966	36.3 mm (1.4 in)
1967	47.1 mm (1.9 in)
1968	26.5 mm (1.0 in)
1969	44.7 mm (1.8 in)
1970	24.2 mm (1.0 in)
1971	69.1 mm (2.7 in)
1972	43.9 mm (1.7 in)
1973	26.7 mm (1.1 in)
1974	27.0 mm (1.1 in)
1975	35.0 mm (1.4 in)
1976	29.7 mm (1.2 in)
1977	32.2 mm (1.3 in)
1978	42.8 mm (1.7 in)
1979	29.7 mm (1.2 in)
1980	43.9 mm (1.7 in)
1981	34.5 mm (1.4 in)
1982	61.8 mm (2.4 in)
1983	36.6 mm (1.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Williams Lake A, 1960 to 1983. The record is 41 days in 1970, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Williams Lake A by year
Year	Longest dry spell (CDD)
1960	7 days
1961	27 days
1962	29 days
1963	22 days
1964	17 days
1965	21 days
1966	23 days
1967	30 days
1968	22 days
1969	23 days
1970	41 days
1971	34 days
1972	28 days
1973	24 days
1974	25 days
1975	29 days
1976	16 days
1977	23 days
1978	22 days
1979	21 days
1980	27 days
1981	21 days
1982	20 days
1983	21 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

23 years with a frost

Across 23 years with a frost, the median last spring frost at Williams Lake A falls on 28 May and the median first autumn frost on 9 September, which leaves a median of 102 days between them.

Frost dates and growing season at Williams Lake A
Measure	Median, all years	Earliest period	Recent period (1961 to 1983)	Recent against earliest	Fitted trend
Last spring frost	28 May	n/a	28 May	n/a	n/a
First autumn frost	9 September	n/a	9 September	n/a	n/a
Growing days	102 days	n/a	102 days	n/a	n/a

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 Williams Lake A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Williams Lake A 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.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).