Mamit Lake Weather Records (CA001124860)

Record envelope, standing records and threshold days for Mamit Lake (CA001124860), British Columbia, Canada, with 42 years of record.

Key Facts for Mamit Lake

Mamit Lake (CA001124860) is a weather station in British Columbia, Canada at 50.38 latitude and -120.80 longitude, 1,006 m (3,301 ft) above sea level.
The station reports from 1924 to 1965, 42 years of record.
1,464 records set at Mamit Lake still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Mamit Lake tied a daily record precipitation of 2.5 mm (0.10 in) on 26 February 1965.

About the Station

Location: British Columbia, Canada, 50.38 latitude, -120.80 longitude.
Elevation: 1,006 m (3,301 ft).
Period of record: 1924 to 1965, 42 years.
Eligible elements: prcp, snow.

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 Mamit Lake. 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 Mamit Lake, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	11.1 C (52.0 F)	-42.8 C (-45.0 F)	n/a	n/a
Feb	14.4 C (57.9 F)	-36.7 C (-34.1 F)	n/a	n/a
Mar	17.8 C (64.0 F)	-37.8 C (-36.0 F)	n/a	n/a
Apr	24.4 C (75.9 F)	-14.4 C (6.1 F)	n/a	n/a
May	30.0 C (86.0 F)	-11.1 C (12.0 F)	n/a	n/a
Jun	34.4 C (93.9 F)	-2.2 C (28.0 F)	n/a	n/a
Jul	34.4 C (93.9 F)	-1.1 C (30.0 F)	n/a	n/a
Aug	33.9 C (93.0 F)	-1.7 C (28.9 F)	n/a	n/a
Sep	30.6 C (87.1 F)	-6.7 C (19.9 F)	n/a	n/a
Oct	23.9 C (75.0 F)	-16.7 C (1.9 F)	n/a	n/a
Nov	16.1 C (61.0 F)	-31.1 C (-24.0 F)	n/a	n/a
Dec	10.6 C (51.1 F)	-37.2 C (-35.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mamit Lake still stand. 1950 holds the most, with 134.

Wettest Day of Each Month

Nov: 69.9 mm (2.8 in)

The wettest day on record for each calendar month at Mamit Lake. The most was 69.9 mm (2.8 in) on 1 November 1945.

Record daily precipitation for each month at Mamit Lake
Month	Record daily precipitation (mm)	Date
Jan	31.0 mm (1.2 in)	7 January 1962
Feb	37.3 mm (1.5 in)	10 February 1951
Mar	33.0 mm (1.3 in)	5 March 1958
Apr	33.0 mm (1.3 in)	14 April 1930
May	23.4 mm (0.9 in)	23 May 1944
Jun	31.2 mm (1.2 in)	7 June 1941
Jul	39.1 mm (1.5 in)	16 July 1961
Aug	32.0 mm (1.3 in)	16 August 1961
Sep	47.5 mm (1.9 in)	16 September 1932
Oct	29.5 mm (1.2 in)	28 October 1933
Nov	69.9 mm (2.8 in)	1 November 1945
Dec	33.0 mm (1.3 in)	29 December 1949

Period of Record Coverage

1949 to 1965

17 years of record at Mamit Lake, 1949 to 1965. 5 years have data for under 90 percent of days and are left out of rankings: 1949, 1952, 1953, 1963, 1965.

Days with data per year at Mamit Lake
Year	Days with data	Share of year	Complete
1949	243	67%	No
1950	365	100%	Yes
1951	345	95%	Yes
1952	244	67%	No
1953	190	52%	No
1954	365	100%	Yes
1955	364	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	172	47%	No
1964	340	93%	Yes
1965	82	22%	No

Latest Records

Latest records at Mamit Lake
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 February 1965	Mamit Lake, CA	daily rain (Tie)	2.5 mm (0.10 in)	tie	21 years	2 of 100 (Routine)
26 February 1965	Mamit Lake, CA	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	21 years	2 of 100 (Routine)
8 February 1965	Mamit Lake, CA	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	23 years	2 of 100 (Routine)
23 January 1965	Mamit Lake, CA	daily rain (Tie)	10.2 mm (0.4 in)	tie	19 years	2 of 100 (Routine)
23 January 1965	Mamit Lake, CA	daily snowfall (Tie)	10.2 cm (4.0 in)	tie	19 years	2 of 100 (Routine)
1 January 1965	Mamit Lake, CA	daily rain	12.7 mm (0.5 in)	2.5 mm (0.10 in)	21 years	16 of 100 (Routine)
1 January 1965	Mamit Lake, CA	daily snowfall	12.7 cm (5.0 in)	2.5 cm (1.0 in)	21 years	16 of 100 (Routine)
9 December 1964	Mamit Lake, CA	daily snowfall	12.7 cm (5.0 in)	1.3 cm (0.5 in)	37 years	18 of 100 (Routine)
9 December 1964	Mamit Lake, CA	daily rain	12.7 mm (0.5 in)	1.3 mm (0.05 in)	37 years	17 of 100 (Routine)
25 November 1964	Mamit Lake, CA	daily snowfall	12.7 cm (5.0 in)	5.1 cm (2.0 in)	2 years	18 of 100 (Routine)
7 September 1964	Mamit Lake, CA	daily rain	25.4 mm (1.0 in)	16.8 mm (0.7 in)	33 years	43 of 100 (Notable)
6 September 1964	Mamit Lake, CA	daily rain	8.4 mm (0.33 in)	3.1 mm (0.12 in)	30 years	18 of 100 (Routine)
2 July 1964	Mamit Lake, CA	daily rain	18.3 mm (0.7 in)	11.4 mm (0.4 in)	20 years	20 of 100 (Routine)
24 May 1964	Mamit Lake, CA	daily snowfall	0.8 cm (0.3 in)	0.8 cm (0.3 in)	40 years	17 of 100 (Routine)
28 January 1964	Mamit Lake, CA	daily rain	5.1 mm (0.20 in)	1.3 mm (0.05 in)	6 years	9 of 100 (Routine)
28 January 1964	Mamit Lake, CA	daily snowfall	5.1 cm (2.0 in)	1.3 cm (0.5 in)	6 years	9 of 100 (Routine)
19 January 1964	Mamit Lake, CA	daily snowfall	12.7 cm (5.0 in)	7.6 cm (3.0 in)	6 years	26 of 100 (Routine)
19 January 1964	Mamit Lake, CA	daily rain	12.7 mm (0.5 in)	7.6 mm (0.30 in)	6 years	20 of 100 (Routine)
17 December 1963	Mamit Lake, CA	daily rain	7.6 mm (0.30 in)	5.1 mm (0.20 in)	36 years	20 of 100 (Routine)
17 December 1963	Mamit Lake, CA	daily snowfall	7.6 cm (3.0 in)	5.1 cm (2.0 in)	36 years	26 of 100 (Routine)

Climate Trend

11 complete years, 1950 to 1964

One stripe for each of 11 complete years at Mamit Lake, 1950 to 1964. Blue stripes are years cooler than the station's own mean of 3.5 C (38.4 F); red stripes are warmer. The coolest year was 1955, at 2.0 C (35.5 F), and the warmest was 1958, at 5.3 C (41.6 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Mamit Lake as warming stripes, 1950 to 1964
Year	Annual mean temperature	Difference from the station mean
1950	2.4 C	-1.13 C
1954	3.3 C	-0.22 C
1955	2.0 C	-1.58 C
1956	3.4 C	-0.17 C
1957	3.4 C	-0.10 C
1958	5.3 C	+1.80 C
1959	3.3 C	-0.24 C
1960	3.7 C	+0.14 C
1961	4.6 C	+1.07 C
1962	4.2 C	+0.66 C
1964	3.4 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

1924 to 1965

Yearly extremes at Mamit Lake: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	34.4 C (93.9 F)	1960	31.7 C (89.1 F)	17
Coldest night (TNn)	-42.8 C (-45.0 F)	1950	-33.9 C (-29.0 F)	17
Wettest day (Rx1day)	69.9 mm (2.8 in)	1945	20.3 mm (0.8 in)	41
Wettest five days (Rx5day)	83.4 mm (3.3 in)	1945	36.1 mm (1.4 in)	41
Longest dry spell (CDD)	62 days	1939	32 days	41

Hottest day (TXx)

The hottest day of the year at Mamit Lake, 1924 to 1965. The record is 34.4 C (93.9 F) in 1960, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Mamit Lake by year
Year	Hottest day (TXx)
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1949	32.2 C (90.0 F)
1950	32.2 C (90.0 F)
1951	31.1 C (88.0 F)
1952	31.1 C (88.0 F)
1953	31.1 C (88.0 F)
1954	28.9 C (84.0 F)
1955	31.7 C (89.1 F)
1956	33.3 C (91.9 F)
1957	29.4 C (84.9 F)
1958	32.8 C (91.0 F)
1959	32.2 C (90.0 F)
1960	34.4 C (93.9 F)
1961	34.4 C (93.9 F)
1962	31.7 C (89.1 F)
1963	32.8 C (91.0 F)
1964	30.6 C (87.1 F)
1965	13.9 C (57.0 F)

Coldest night (TNn)

The coldest night of the year at Mamit Lake, 1924 to 1965. The record is -42.8 C (-45.0 F) in 1950, marked on the chart; the median year is -33.9 C (-29.0 F).

Coldest night (TNn) at Mamit Lake by year
Year	Coldest night (TNn)
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1949	-30.6 C (-23.1 F)
1950	-42.8 C (-45.0 F)
1951	-37.2 C (-35.0 F)
1952	-25.0 C (-13.0 F)
1953	-15.0 C (5.0 F)
1954	-36.7 C (-34.1 F)
1955	-37.8 C (-36.0 F)
1956	-36.7 C (-34.1 F)
1957	-39.4 C (-38.9 F)
1958	-25.0 C (-13.0 F)
1959	-34.4 C (-29.9 F)
1960	-30.0 C (-22.0 F)
1961	-22.2 C (-8.0 F)
1962	-33.9 C (-29.0 F)
1963	-31.7 C (-25.1 F)
1964	-35.6 C (-32.1 F)
1965	-32.8 C (-27.0 F)

Wettest day (Rx1day)

The wettest day of the year at Mamit Lake, 1924 to 1965. The record is 69.9 mm (2.8 in) in 1945, marked on the chart; the median year is 20.3 mm (0.8 in).

Wettest day (Rx1day) at Mamit Lake by year
Year	Wettest day (Rx1day)
1924	19.6 mm (0.8 in)
1925	24.6 mm (1.0 in)
1926	23.6 mm (0.9 in)
1927	15.7 mm (0.6 in)
1928	16.3 mm (0.6 in)
1929	20.3 mm (0.8 in)
1930	33.0 mm (1.3 in)
1931	28.2 mm (1.1 in)
1932	47.5 mm (1.9 in)
1933	29.5 mm (1.2 in)
1934	17.3 mm (0.7 in)
1935	25.4 mm (1.0 in)
1936	17.8 mm (0.7 in)
1937	20.3 mm (0.8 in)
1938	21.1 mm (0.8 in)
1939	13.2 mm (0.5 in)
1940	20.1 mm (0.8 in)
1941	31.2 mm (1.2 in)
1942	20.3 mm (0.8 in)
1943	16.5 mm (0.6 in)
1944	23.4 mm (0.9 in)
1945	69.9 mm (2.8 in)
1946	30.0 mm (1.2 in)
1947	15.0 mm (0.6 in)
1949	33.0 mm (1.3 in)
1950	13.0 mm (0.5 in)
1951	37.3 mm (1.5 in)
1952	12.7 mm (0.5 in)
1953	16.0 mm (0.6 in)
1954	32.3 mm (1.3 in)
1955	17.3 mm (0.7 in)
1956	24.4 mm (1.0 in)
1957	18.3 mm (0.7 in)
1958	33.0 mm (1.3 in)
1959	19.6 mm (0.8 in)
1960	18.8 mm (0.7 in)
1961	39.1 mm (1.5 in)
1962	31.0 mm (1.2 in)
1963	14.5 mm (0.6 in)
1964	25.4 mm (1.0 in)
1965	12.7 mm (0.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mamit Lake, 1924 to 1965. The record is 83.4 mm (3.3 in) in 1945, marked on the chart; the median year is 36.1 mm (1.4 in).

Wettest five days (Rx5day) at Mamit Lake by year
Year	Wettest five days (Rx5day)
1924	55.4 mm (2.2 in)
1925	24.6 mm (1.0 in)
1926	28.7 mm (1.1 in)
1927	26.4 mm (1.0 in)
1928	25.2 mm (1.0 in)
1929	39.4 mm (1.6 in)
1930	33.0 mm (1.3 in)
1931	40.9 mm (1.6 in)
1932	47.5 mm (1.9 in)
1933	42.2 mm (1.7 in)
1934	21.6 mm (0.9 in)
1935	34.3 mm (1.4 in)
1936	28.8 mm (1.1 in)
1937	38.4 mm (1.5 in)
1938	46.5 mm (1.8 in)
1939	33.0 mm (1.3 in)
1940	24.9 mm (1.0 in)
1941	34.5 mm (1.4 in)
1942	46.5 mm (1.8 in)
1943	42.6 mm (1.7 in)
1944	46.8 mm (1.8 in)
1945	83.4 mm (3.3 in)
1946	39.7 mm (1.6 in)
1947	33.7 mm (1.3 in)
1949	66.8 mm (2.6 in)
1950	53.6 mm (2.1 in)
1951	59.4 mm (2.3 in)
1952	18.2 mm (0.7 in)
1953	27.0 mm (1.1 in)
1954	41.9 mm (1.6 in)
1955	29.8 mm (1.2 in)
1956	33.0 mm (1.3 in)
1957	36.5 mm (1.4 in)
1958	40.4 mm (1.6 in)
1959	35.6 mm (1.4 in)
1960	31.4 mm (1.2 in)
1961	40.9 mm (1.6 in)
1962	46.2 mm (1.8 in)
1963	22.6 mm (0.9 in)
1964	36.1 mm (1.4 in)
1965	20.3 mm (0.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mamit Lake, 1924 to 1965. The record is 62 days in 1939, marked on the chart; the median year is 32 days.

Longest dry spell (CDD) at Mamit Lake by year
Year	Longest dry spell (CDD)
1924	40 days
1925	36 days
1926	39 days
1927	29 days
1928	56 days
1929	32 days
1930	28 days
1931	37 days
1932	32 days
1933	32 days
1934	28 days
1935	38 days
1936	39 days
1937	33 days
1938	29 days
1939	62 days
1940	30 days
1941	26 days
1942	27 days
1943	43 days
1944	49 days
1945	27 days
1946	29 days
1947	39 days
1949	17 days
1950	41 days
1951	36 days
1952	29 days
1953	11 days
1954	34 days
1955	23 days
1956	33 days
1957	29 days
1958	30 days
1959	33 days
1960	29 days
1961	26 days
1962	35 days
1963	51 days
1964	47 days
1965	32 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.

Rainfall Return Levels

35 years, 1924 to 1964

A day with at least 22.7 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 69.2 mm (2.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Mamit Lake: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	22.7 mm (0.9 in)
5 years	31.3 mm (1.2 in)
10 years	38.2 mm (1.5 in)
25 years	48.9 mm (1.9 in)
50 years	58.3 mm (2.3 in)	Longer than the 35 years of record
100 years	69.2 mm (2.7 in)	Longer than the 35 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 35 years of values from 1924 to 1964.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 69.9 mm (2.8 in) in 1945; 47.5 mm (1.9 in) in 1932; 39.1 mm (1.5 in) in 1961.

Download the Data

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