Dewar Lakes Weather Records (CA002401030)

Record envelope, standing records and threshold days for Dewar Lakes (CA002401030), Nunavut, Canada, with 66 years of record.

Key Facts for Dewar Lakes

Dewar Lakes (CA002401030) is a weather station in Nunavut, Canada at 68.65 latitude and -71.17 longitude, 527 m (1,729 ft) above sea level.
The station reports from 1958 to 2023, 66 years of record.
1,464 records set at Dewar Lakes still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Nunavut, Canada, 68.65 latitude, -71.17 longitude.
Elevation: 527 m (1,729 ft).
Period of record: 1958 to 2023, 66 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 Dewar Lakes. 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 Dewar Lakes, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	-0.6 C (30.9 F)	-49.4 C (-56.9 F)	n/a	n/a
Feb	0.0 C (32.0 F)	-50.7 C (-59.3 F)	n/a	n/a
Mar	-2.3 C (27.9 F)	-48.3 C (-54.9 F)	n/a	n/a
Apr	-1.1 C (30.0 F)	-39.8 C (-39.6 F)	n/a	n/a
May	9.5 C (49.1 F)	-29.4 C (-20.9 F)	n/a	n/a
Jun	17.2 C (63.0 F)	-17.2 C (1.0 F)	n/a	n/a
Jul	20.0 C (68.0 F)	-6.3 C (20.7 F)	n/a	n/a
Aug	20.6 C (69.1 F)	-7.5 C (18.5 F)	n/a	n/a
Sep	11.1 C (52.0 F)	-17.2 C (1.0 F)	n/a	n/a
Oct	3.3 C (37.9 F)	-33.0 C (-27.4 F)	n/a	n/a
Nov	-0.6 C (30.9 F)	-40.6 C (-41.1 F)	n/a	n/a
Dec	0.0 C (32.0 F)	-45.0 C (-49.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Dewar Lakes still stand. 1978 holds the most, with 84.

Standing records at Dewar Lakes by the year they were set
Year set	Standing records
1958	41
1959	55
1960	62
1961	67
1962	79
1963	57
1964	68
1965	44
1966	67
1967	71
1968	67
1969	57
1970	69
1971	26
1972	66
1973	47
1974	18
1975	60
1976	40
1977	50
1978	84
1979	65
1980	74
1981	46
1982	33
1983	51

Wettest Day of Each Month

Aug: 46.0 mm (1.8 in)

The wettest day on record for each calendar month at Dewar Lakes. The most was 46.0 mm (1.8 in) on 20 August 1970.

Record daily precipitation for each month at Dewar Lakes
Month	Record daily precipitation (mm)	Date
Jan	13.2 mm (0.5 in)	1 January 1980
Feb	10.9 mm (0.4 in)	26 February 1970
Mar	11.8 mm (0.5 in)	30 March 1977
Apr	16.0 mm (0.6 in)	21 April 1974
May	20.3 mm (0.8 in)	10 May 1959
Jun	19.8 mm (0.8 in)	27 June 1974
Jul	36.3 mm (1.4 in)	21 July 1966
Aug	46.0 mm (1.8 in)	20 August 1970
Sep	21.8 mm (0.9 in)	6 September 1968
Oct	26.7 mm (1.1 in)	5 October 1975
Nov	11.0 mm (0.4 in)	1 November 1979
Dec	11.4 mm (0.4 in)	22 December 1970

Period of Record Coverage

1958 to 1983

26 years of record at Dewar Lakes, 1958 to 1983. 2 years have data for under 90 percent of days and are left out of rankings: 1958, 1983.

Days with data per year at Dewar Lakes
Year	Days with data	Share of year	Complete
1958	177	48%	No
1959	348	95%	Yes
1960	361	99%	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	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	361	99%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	356	98%	Yes
1983	326	89%	No

Latest Records

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

Climate Trend

23 complete years, 1960 to 1982

One stripe for each of 23 complete years at Dewar Lakes, 1960 to 1982. Blue stripes are years cooler than the station's own mean of -13.1 C (8.4 F); red stripes are warmer. The coolest year was 1972, at -16.1 C (3.0 F), and the warmest was 1981, at -11.0 C (12.3 F). The strongest colour marks a difference of 3.0 C (5.4 F).

Annual mean temperature at Dewar Lakes as warming stripes, 1960 to 1982
Year	Annual mean temperature	Difference from the station mean
1960	-11.2 C	+1.91 C
1961	-14.4 C	-1.29 C
1962	-12.2 C	+0.86 C
1963	-12.2 C	+0.93 C
1964	-14.8 C	-1.65 C
1965	-13.0 C	+0.10 C
1966	-11.8 C	+1.30 C
1967	-13.9 C	-0.78 C
1968	-12.4 C	+0.68 C
1969	-11.8 C	+1.26 C
1970	-14.2 C	-1.06 C
1971	-13.4 C	-0.30 C
1972	-16.1 C	-2.99 C
1973	-13.0 C	+0.10 C
1974	-13.6 C	-0.45 C
1975	-13.1 C	-0.01 C
1976	-14.1 C	-1.04 C
1977	-11.9 C	+1.22 C
1978	-15.0 C	-1.91 C
1979	-13.8 C	-0.71 C
1980	-11.3 C	+1.83 C
1981	-11.0 C	+2.14 C
1982	-13.3 C	-0.22 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

1958 to 1983

Yearly extremes at Dewar Lakes: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	20.6 C (69.1 F)	1966	16.7 C (62.1 F)	26
Coldest night (TNn)	-50.7 C (-59.3 F)	1979	-43.6 C (-46.5 F)	26
Wettest day (Rx1day)	46.0 mm (1.8 in)	1970	20.3 mm (0.8 in)	26
Wettest five days (Rx5day)	105.5 mm (4.2 in)	1964	37.0 mm (1.5 in)	26
Longest dry spell (CDD)	113 days	1964	53 days	26

Hottest day (TXx)

The hottest day of the year at Dewar Lakes, 1958 to 1983. The record is 20.6 C (69.1 F) in 1966, marked on the chart; the median year is 16.7 C (62.1 F).

Hottest day (TXx) at Dewar Lakes by year
Year	Hottest day (TXx)
1958	16.7 C (62.1 F)
1959	14.4 C (57.9 F)
1960	16.7 C (62.1 F)
1961	17.8 C (64.0 F)
1962	18.9 C (66.0 F)
1963	16.7 C (62.1 F)
1964	13.9 C (57.0 F)
1965	17.8 C (64.0 F)
1966	20.6 C (69.1 F)
1967	19.4 C (66.9 F)
1968	11.7 C (53.1 F)
1969	20.0 C (68.0 F)
1970	13.3 C (55.9 F)
1971	14.4 C (57.9 F)
1972	13.9 C (57.0 F)
1973	17.8 C (64.0 F)
1974	16.7 C (62.1 F)
1975	17.2 C (63.0 F)
1976	12.2 C (54.0 F)
1977	15.1 C (59.2 F)
1978	13.1 C (55.6 F)
1979	12.3 C (54.1 F)
1980	14.0 C (57.2 F)
1981	18.6 C (65.5 F)
1982	16.2 C (61.2 F)
1983	17.0 C (62.6 F)

Coldest night (TNn)

The coldest night of the year at Dewar Lakes, 1958 to 1983. The record is -50.7 C (-59.3 F) in 1979, marked on the chart; the median year is -43.6 C (-46.5 F).

Coldest night (TNn) at Dewar Lakes by year
Year	Coldest night (TNn)
1958	-38.3 C (-36.9 F)
1959	-45.6 C (-50.1 F)
1960	-41.7 C (-43.1 F)
1961	-46.7 C (-52.1 F)
1962	-43.9 C (-47.0 F)
1963	-43.3 C (-45.9 F)
1964	-48.3 C (-54.9 F)
1965	-45.6 C (-50.1 F)
1966	-43.3 C (-45.9 F)
1967	-45.6 C (-50.1 F)
1968	-45.0 C (-49.0 F)
1969	-43.3 C (-45.9 F)
1970	-45.6 C (-50.1 F)
1971	-43.3 C (-45.9 F)
1972	-44.4 C (-47.9 F)
1973	-42.8 C (-45.0 F)
1974	-43.3 C (-45.9 F)
1975	-49.4 C (-56.9 F)
1976	-41.7 C (-43.1 F)
1977	-40.3 C (-40.5 F)
1978	-41.4 C (-42.5 F)
1979	-50.7 C (-59.3 F)
1980	-41.5 C (-42.7 F)
1981	-39.8 C (-39.6 F)
1982	-45.3 C (-49.5 F)
1983	-48.2 C (-54.8 F)

Wettest day (Rx1day)

The wettest day of the year at Dewar Lakes, 1958 to 1983. The record is 46.0 mm (1.8 in) in 1970, marked on the chart; the median year is 20.3 mm (0.8 in).

Wettest day (Rx1day) at Dewar Lakes by year
Year	Wettest day (Rx1day)
1958	7.6 mm (0.30 in)
1959	20.3 mm (0.8 in)
1960	11.2 mm (0.4 in)
1961	20.3 mm (0.8 in)
1962	20.6 mm (0.8 in)
1963	15.2 mm (0.6 in)
1964	43.4 mm (1.7 in)
1965	15.2 mm (0.6 in)
1966	36.3 mm (1.4 in)
1967	31.5 mm (1.2 in)
1968	21.8 mm (0.9 in)
1969	12.7 mm (0.5 in)
1970	46.0 mm (1.8 in)
1971	14.2 mm (0.6 in)
1972	13.2 mm (0.5 in)
1973	21.3 mm (0.8 in)
1974	24.1 mm (0.9 in)
1975	40.9 mm (1.6 in)
1976	19.3 mm (0.8 in)
1977	24.2 mm (1.0 in)
1978	8.0 mm (0.31 in)
1979	17.3 mm (0.7 in)
1980	37.2 mm (1.5 in)
1981	25.1 mm (1.0 in)
1982	12.0 mm (0.5 in)
1983	19.2 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Dewar Lakes, 1958 to 1983. The record is 105.5 mm (4.2 in) in 1964, marked on the chart; the median year is 37.0 mm (1.5 in).

Wettest five days (Rx5day) at Dewar Lakes by year
Year	Wettest five days (Rx5day)
1958	12.9 mm (0.5 in)
1959	39.4 mm (1.6 in)
1960	32.4 mm (1.3 in)
1961	34.6 mm (1.4 in)
1962	24.7 mm (1.0 in)
1963	25.4 mm (1.0 in)
1964	105.5 mm (4.2 in)
1965	19.0 mm (0.7 in)
1966	37.9 mm (1.5 in)
1967	41.2 mm (1.6 in)
1968	36.1 mm (1.4 in)
1969	31.0 mm (1.2 in)
1970	77.2 mm (3.0 in)
1971	55.9 mm (2.2 in)
1972	22.3 mm (0.9 in)
1973	50.2 mm (2.0 in)
1974	57.1 mm (2.2 in)
1975	90.4 mm (3.6 in)
1976	34.6 mm (1.4 in)
1977	41.7 mm (1.6 in)
1978	14.5 mm (0.6 in)
1979	38.6 mm (1.5 in)
1980	59.0 mm (2.3 in)
1981	46.3 mm (1.8 in)
1982	29.6 mm (1.2 in)
1983	25.8 mm (1.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Dewar Lakes, 1958 to 1983. The record is 113 days in 1964, marked on the chart; the median year is 53 days.

Longest dry spell (CDD) at Dewar Lakes by year
Year	Longest dry spell (CDD)
1958	64 days
1959	52 days
1960	49 days
1961	96 days
1962	84 days
1963	48 days
1964	113 days
1965	69 days
1966	80 days
1967	68 days
1968	92 days
1969	43 days
1970	54 days
1971	69 days
1972	56 days
1973	35 days
1974	84 days
1975	61 days
1976	40 days
1977	22 days
1978	29 days
1979	51 days
1980	35 days
1981	42 days
1982	37 days
1983	31 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 Dewar Lakes falls on 30 June and the median first autumn frost on 2 July, which leaves a median of 5 days between them.

Frost dates and growing season at Dewar Lakes
Measure	Median, all years	Earliest period	Recent period (1960 to 1982)	Recent against earliest	Fitted trend
Last spring frost	30 June	n/a	30 June	n/a	n/a
First autumn frost	2 July	n/a	2 July	n/a	n/a
Growing days	5 days	n/a	5 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 Dewar Lakes standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dewar Lakes 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).