Duncan Lake Dam Weather Records (CA001142574)

Record envelope, standing records and threshold days for Duncan Lake Dam (CA001142574), British Columbia, Canada, with 62 years of record.

Key Facts for Duncan Lake Dam

Duncan Lake Dam (CA001142574) is a weather station in British Columbia, Canada at 50.23 latitude and -116.97 longitude, 549 m (1,801 ft) above sea level.
The station reports from 1963 to 2024, 62 years of record.
1,464 records set at Duncan Lake Dam 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, 50.23 latitude, -116.97 longitude.
Elevation: 549 m (1,801 ft).
Period of record: 1963 to 2024, 62 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 Duncan Lake Dam. 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 Duncan Lake Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	8.9 C (48.0 F)	-29.0 C (-20.2 F)	n/a	n/a
Feb	10.0 C (50.0 F)	-25.0 C (-13.0 F)	n/a	n/a
Mar	16.7 C (62.1 F)	-20.0 C (-4.0 F)	n/a	n/a
Apr	29.4 C (84.9 F)	-12.2 C (10.0 F)	n/a	n/a
May	34.0 C (93.2 F)	-4.0 C (24.8 F)	n/a	n/a
Jun	33.3 C (91.9 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	36.5 C (97.7 F)	2.2 C (36.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	1.7 C (35.1 F)	n/a	n/a
Sep	32.2 C (90.0 F)	-5.5 C (22.1 F)	n/a	n/a
Oct	21.7 C (71.1 F)	-9.4 C (15.1 F)	n/a	n/a
Nov	18.3 C (64.9 F)	-18.3 C (-0.9 F)	n/a	n/a
Dec	9.5 C (49.1 F)	-31.7 C (-25.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Duncan Lake Dam still stand. 1979 holds the most, with 90.

Standing records at Duncan Lake Dam by the year they were set
Year set	Standing records
1963	60
1964	54
1965	81
1966	76
1967	84
1968	75
1969	86
1970	57
1971	67
1972	86
1973	74
1974	61
1975	86
1976	51
1977	51
1978	48
1979	90
1980	67
1981	64
1982	58
1983	88

Wettest Day of Each Month

Dec: 56.9 mm (2.2 in)

The wettest day on record for each calendar month at Duncan Lake Dam. The most was 56.9 mm (2.2 in) on 16 December 1971.

Record daily precipitation for each month at Duncan Lake Dam
Month	Record daily precipitation (mm)	Date
Jan	34.0 mm (1.3 in)	11 January 1975
Feb	41.0 mm (1.6 in)	14 February 1982
Mar	19.6 mm (0.8 in)	29 March 1971
Apr	26.7 mm (1.1 in)	26 April 1974
May	26.6 mm (1.0 in)	4 May 1981
Jun	33.6 mm (1.3 in)	30 June 1981
Jul	30.0 mm (1.2 in)	13 July 1981
Aug	34.8 mm (1.4 in)	24 August 1976
Sep	31.2 mm (1.2 in)	25 September 1965
Oct	25.1 mm (1.0 in)	25 October 1971
Nov	38.1 mm (1.5 in)	20 November 1974
Dec	56.9 mm (2.2 in)	16 December 1971

Period of Record Coverage

1963 to 1983

21 years of record at Duncan Lake Dam, 1963 to 1983. 2 years have data for under 90 percent of days and are left out of rankings: 1963, 1964.

Days with data per year at Duncan Lake Dam
Year	Days with data	Share of year	Complete
1963	268	73%	No
1964	327	89%	No
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	365	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	355	97%	Yes

Latest Records

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

Climate Trend

19 complete years, 1965 to 1983

One stripe for each of 19 complete years at Duncan Lake Dam, 1965 to 1983. Blue stripes are years cooler than the station's own mean of 6.6 C (43.9 F); red stripes are warmer. The coolest year was 1982, at 5.8 C (42.4 F), and the warmest was 1967, at 8.0 C (46.3 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Duncan Lake Dam as warming stripes, 1965 to 1983
Year	Annual mean temperature	Difference from the station mean
1965	7.1 C	+0.52 C
1966	7.5 C	+0.89 C
1967	8.0 C	+1.33 C
1968	6.7 C	+0.09 C
1969	6.6 C	-0.06 C
1970	6.4 C	-0.18 C
1971	6.2 C	-0.38 C
1972	5.8 C	-0.79 C
1973	6.9 C	+0.26 C
1974	7.2 C	+0.60 C
1975	5.8 C	-0.78 C
1976	6.6 C	0.00 C
1977	6.5 C	-0.10 C
1978	6.3 C	-0.32 C
1979	6.2 C	-0.38 C
1980	6.7 C	+0.06 C
1981	6.9 C	+0.32 C
1982	5.8 C	-0.85 C
1983	6.4 C	-0.19 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

1963 to 1983

Yearly extremes at Duncan Lake Dam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.5 C (97.7 F)	1979	33.9 C (93.0 F)	21
Coldest night (TNn)	-31.7 C (-25.1 F)	1968	-22.5 C (-8.5 F)	21
Wettest day (Rx1day)	56.9 mm (2.2 in)	1971	28.2 mm (1.1 in)	21
Wettest five days (Rx5day)	101.4 mm (4.0 in)	1982	56.9 mm (2.2 in)	21
Longest dry spell (CDD)	29 days	1967	16 days	21

Hottest day (TXx)

The hottest day of the year at Duncan Lake Dam, 1963 to 1983. The record is 36.5 C (97.7 F) in 1979, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Duncan Lake Dam by year
Year	Hottest day (TXx)
1963	31.7 C (89.1 F)
1964	33.9 C (93.0 F)
1965	35.0 C (95.0 F)
1966	33.3 C (91.9 F)
1967	35.0 C (95.0 F)
1968	35.0 C (95.0 F)
1969	32.2 C (90.0 F)
1970	33.9 C (93.0 F)
1971	33.9 C (93.0 F)
1972	33.9 C (93.0 F)
1973	35.0 C (95.0 F)
1974	33.3 C (91.9 F)
1975	36.1 C (97.0 F)
1976	31.1 C (88.0 F)
1977	32.8 C (91.0 F)
1978	32.5 C (90.5 F)
1979	36.5 C (97.7 F)
1980	31.5 C (88.7 F)
1981	32.5 C (90.5 F)
1982	34.5 C (94.1 F)
1983	34.0 C (93.2 F)

Coldest night (TNn)

The coldest night of the year at Duncan Lake Dam, 1963 to 1983. The record is -31.7 C (-25.1 F) in 1968, marked on the chart; the median year is -22.5 C (-8.5 F).

Coldest night (TNn) at Duncan Lake Dam by year
Year	Coldest night (TNn)
1963	-16.7 C (1.9 F)
1964	-13.9 C (7.0 F)
1965	-18.3 C (-0.9 F)
1966	-18.9 C (-2.0 F)
1967	-16.1 C (3.0 F)
1968	-31.7 C (-25.1 F)
1969	-28.3 C (-18.9 F)
1970	-21.7 C (-7.1 F)
1971	-20.6 C (-5.1 F)
1972	-25.6 C (-14.1 F)
1973	-22.2 C (-8.0 F)
1974	-23.9 C (-11.0 F)
1975	-23.3 C (-9.9 F)
1976	-21.1 C (-6.0 F)
1977	-19.4 C (-2.9 F)
1978	-28.0 C (-18.4 F)
1979	-29.0 C (-20.2 F)
1980	-25.0 C (-13.0 F)
1981	-22.5 C (-8.5 F)
1982	-24.0 C (-11.2 F)
1983	-27.5 C (-17.5 F)

Wettest day (Rx1day)

The wettest day of the year at Duncan Lake Dam, 1963 to 1983. The record is 56.9 mm (2.2 in) in 1971, marked on the chart; the median year is 28.2 mm (1.1 in).

Wettest day (Rx1day) at Duncan Lake Dam by year
Year	Wettest day (Rx1day)
1963	29.7 mm (1.2 in)
1964	28.2 mm (1.1 in)
1965	31.2 mm (1.2 in)
1966	25.4 mm (1.0 in)
1967	27.9 mm (1.1 in)
1968	23.9 mm (0.9 in)
1969	22.9 mm (0.9 in)
1970	23.1 mm (0.9 in)
1971	56.9 mm (2.2 in)
1972	26.7 mm (1.1 in)
1973	21.1 mm (0.8 in)
1974	38.1 mm (1.5 in)
1975	34.0 mm (1.3 in)
1976	34.8 mm (1.4 in)
1977	25.4 mm (1.0 in)
1978	29.5 mm (1.2 in)
1979	27.2 mm (1.1 in)
1980	31.0 mm (1.2 in)
1981	33.6 mm (1.3 in)
1982	41.0 mm (1.6 in)
1983	25.0 mm (1.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Duncan Lake Dam, 1963 to 1983. The record is 101.4 mm (4.0 in) in 1982, marked on the chart; the median year is 56.9 mm (2.2 in).

Wettest five days (Rx5day) at Duncan Lake Dam by year
Year	Wettest five days (Rx5day)
1963	50.2 mm (2.0 in)
1964	45.0 mm (1.8 in)
1965	56.4 mm (2.2 in)
1966	61.3 mm (2.4 in)
1967	52.8 mm (2.1 in)
1968	54.8 mm (2.2 in)
1969	56.5 mm (2.2 in)
1970	48.4 mm (1.9 in)
1971	97.1 mm (3.8 in)
1972	57.4 mm (2.3 in)
1973	52.4 mm (2.1 in)
1974	72.9 mm (2.9 in)
1975	96.3 mm (3.8 in)
1976	56.9 mm (2.2 in)
1977	58.6 mm (2.3 in)
1978	68.6 mm (2.7 in)
1979	60.4 mm (2.4 in)
1980	66.4 mm (2.6 in)
1981	44.8 mm (1.8 in)
1982	101.4 mm (4.0 in)
1983	52.6 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Duncan Lake Dam, 1963 to 1983. The record is 29 days in 1967, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Duncan Lake Dam by year
Year	Longest dry spell (CDD)
1963	19 days
1964	9 days
1965	21 days
1966	19 days
1967	29 days
1968	13 days
1969	28 days
1970	29 days
1971	14 days
1972	23 days
1973	14 days
1974	24 days
1975	21 days
1976	14 days
1977	16 days
1978	10 days
1979	16 days
1980	11 days
1981	15 days
1982	12 days
1983	13 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 Duncan Lake Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Duncan Lake Dam 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).