Lois River Dam Weather Records (CA001044710)

Record envelope, standing records and threshold days for Lois River Dam (CA001044710), British Columbia, Canada, with 77 years of record.

Key Facts for Lois River Dam

Lois River Dam (CA001044710) is a weather station in British Columbia, Canada at 49.80 latitude and -124.32 longitude, 157 m (515 ft) above sea level.
The station reports from 1931 to 2007, 77 years of record.
0 records set at Lois River Dam still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Lois River Dam set a monthly record daily precipitation of 94.7 mm (3.7 in) on 15 November 1983.

About the Station

Location: British Columbia, Canada, 49.80 latitude, -124.32 longitude.
Elevation: 157 m (515 ft).
Period of record: 1931 to 2007, 77 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 Lois River 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 Lois River Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Lois River Dam still stand.

All-Time Record Progression

2 new records

2 all-time records were set at Lois River Dam between 6 January 1966 and 14 January 1973. Each dot is a new record.

When Lois River Dam set new all-time records
Date	Kind	Detail
1966-01-06	Record daily snowfall	Record daily snowfall 61.0 cm (24.0 in)
1973-01-14	Record daily precipitation	Record daily precipitation 104.9 mm (4.1 in)

Wettest Day of Each Month

Jan: 104.9 mm (4.1 in)

The wettest day on record for each calendar month at Lois River Dam. The most was 104.9 mm (4.1 in) on 14 January 1973.

Record daily precipitation for each month at Lois River Dam
Month	Record daily precipitation (mm)	Date
Jan	104.9 mm (4.1 in)	14 January 1973
Feb	102.3 mm (4.0 in)	10 February 1983
Mar	76.1 mm (3.0 in)	8 March 1983
Apr	36.8 mm (1.4 in)	27 April 1962
May	45.7 mm (1.8 in)	3 May 1951
Jun	61.2 mm (2.4 in)	14 June 1976
Jul	78.7 mm (3.1 in)	8 July 1963
Aug	71.9 mm (2.8 in)	23 August 1950
Sep	81.4 mm (3.2 in)	1 September 1983
Oct	71.1 mm (2.8 in)	4 October 1968
Nov	94.7 mm (3.7 in)	15 November 1983
Dec	93.5 mm (3.7 in)	31 December 1938

Latest Records

Latest records at Lois River Dam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 November 1983	Lois River Dam, CA	monthly rain	94.7 mm (3.7 in)	8.7 mm (0.34 in)	0 years	23 of 100 (Routine)
14 November 1983	Lois River Dam, CA	monthly rain	86.0 mm (3.4 in)	11.8 mm (0.5 in)	24 years	33 of 100 (Routine)
1 September 1983	Lois River Dam, CA	monthly rain	81.4 mm (3.2 in)	25.3 mm (1.0 in)	13 years	43 of 100 (Notable)
26 July 1983	Lois River Dam, CA	daily rain	18.8 mm (0.7 in)	2.5 mm (0.10 in)	28 years	15 of 100 (Routine)
29 March 1983	Lois River Dam, CA	daily rain	28.4 mm (1.1 in)	5.5 mm (0.22 in)	12 years	15 of 100 (Routine)
28 March 1983	Lois River Dam, CA	daily rain	25.4 mm (1.0 in)	0.5 mm (0.02 in)	17 years	10 of 100 (Routine)
8 March 1983	Lois River Dam, CA	monthly rain	76.1 mm (3.0 in)	24.8 mm (1.0 in)	5 years	48 of 100 (Notable)
22 February 1983	Lois River Dam, CA	daily rain	23.5 mm (0.9 in)	0.6 mm (0.02 in)	25 years	12 of 100 (Routine)
19 February 1983	Lois River Dam, CA	daily rain	50.4 mm (2.0 in)	24.4 mm (1.0 in)	0 years	30 of 100 (Routine)
17 February 1983	Lois River Dam, CA	daily rain	30.3 mm (1.2 in)	0.3 mm (0.01 in)	8 years	7 of 100 (Routine)
11 February 1983	Lois River Dam, CA	daily rain	51.1 mm (2.0 in)	3.6 mm (0.14 in)	36 years	18 of 100 (Routine)
10 February 1983	Lois River Dam, CA	monthly rain	102.3 mm (4.0 in)	42.6 mm (1.7 in)	15 years	59 of 100 (Notable)
21 October 1982	Lois River Dam, CA	daily rain	31.5 mm (1.2 in)	6.9 mm (0.27 in)	48 years	25 of 100 (Routine)
19 February 1982	Lois River Dam, CA	daily rain	26.0 mm (1.0 in)	8.5 mm (0.33 in)	20 years	19 of 100 (Routine)
5 October 1981	Lois River Dam, CA	daily rain	28.0 mm (1.1 in)	15.3 mm (0.6 in)	20 years	24 of 100 (Routine)
17 June 1981	Lois River Dam, CA	daily rain (Tie)	16.0 mm (0.6 in)	tie	44 years	4 of 100 (Routine)
18 February 1981	Lois River Dam, CA	daily rain	24.4 mm (1.0 in)	0.5 mm (0.02 in)	27 years	13 of 100 (Routine)
2 December 1980	Lois River Dam, CA	daily snowfall	10.0 cm (3.9 in)	7.5 cm (3.0 in)	32 years	24 of 100 (Routine)
20 November 1980	Lois River Dam, CA	daily rain	37.0 mm (1.5 in)	11.1 mm (0.4 in)	41 years	27 of 100 (Routine)
5 November 1980	Lois River Dam, CA	daily rain	32.6 mm (1.3 in)	10.5 mm (0.4 in)	5 years	16 of 100 (Routine)

Extremes by Year

1931 to 1983

Yearly extremes at Lois River Dam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	104.9 mm (4.1 in)	1973	53.3 mm (2.1 in)	53
Wettest five days (Rx5day)	250.8 mm (9.9 in)	1983	112.5 mm (4.4 in)	53
Longest dry spell (CDD)	47 days	1974	24 days	53

Wettest day (Rx1day)

The wettest day of the year at Lois River Dam, 1931 to 1983. The record is 104.9 mm (4.1 in) in 1973, marked on the chart; the median year is 53.3 mm (2.1 in).

Wettest day (Rx1day) at Lois River Dam by year
Year	Wettest day (Rx1day)
1931	38.1 mm (1.5 in)
1932	33.0 mm (1.3 in)
1933	60.2 mm (2.4 in)
1934	47.8 mm (1.9 in)
1935	58.4 mm (2.3 in)
1936	60.7 mm (2.4 in)
1937	41.1 mm (1.6 in)
1938	93.5 mm (3.7 in)
1939	54.4 mm (2.1 in)
1940	64.5 mm (2.5 in)
1941	53.6 mm (2.1 in)
1942	31.5 mm (1.2 in)
1943	52.8 mm (2.1 in)
1944	51.3 mm (2.0 in)
1945	51.6 mm (2.0 in)
1946	43.9 mm (1.7 in)
1947	76.5 mm (3.0 in)
1948	48.3 mm (1.9 in)
1949	53.3 mm (2.1 in)
1950	71.9 mm (2.8 in)
1951	79.0 mm (3.1 in)
1952	42.7 mm (1.7 in)
1953	54.6 mm (2.1 in)
1954	72.4 mm (2.9 in)
1955	62.7 mm (2.5 in)
1956	50.0 mm (2.0 in)
1957	38.4 mm (1.5 in)
1958	74.2 mm (2.9 in)
1959	38.1 mm (1.5 in)
1960	62.0 mm (2.4 in)
1961	46.2 mm (1.8 in)
1962	37.1 mm (1.5 in)
1963	78.7 mm (3.1 in)
1964	34.3 mm (1.4 in)
1965	44.7 mm (1.8 in)
1966	61.0 mm (2.4 in)
1967	59.7 mm (2.4 in)
1968	71.1 mm (2.8 in)
1969	56.1 mm (2.2 in)
1970	46.2 mm (1.8 in)
1971	39.9 mm (1.6 in)
1972	53.3 mm (2.1 in)
1973	104.9 mm (4.1 in)
1974	53.3 mm (2.1 in)
1975	68.3 mm (2.7 in)
1976	61.2 mm (2.4 in)
1977	52.1 mm (2.1 in)
1978	56.4 mm (2.2 in)
1979	77.9 mm (3.1 in)
1980	50.2 mm (2.0 in)
1981	32.0 mm (1.3 in)
1982	31.5 mm (1.2 in)
1983	102.3 mm (4.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lois River Dam, 1931 to 1983. The record is 250.8 mm (9.9 in) in 1983, marked on the chart; the median year is 112.5 mm (4.4 in).

Wettest five days (Rx5day) at Lois River Dam by year
Year	Wettest five days (Rx5day)
1931	99.7 mm (3.9 in)
1932	74.1 mm (2.9 in)
1933	125.7 mm (4.9 in)
1934	111.8 mm (4.4 in)
1935	187.2 mm (7.4 in)
1936	76.3 mm (3.0 in)
1937	88.6 mm (3.5 in)
1938	154.5 mm (6.1 in)
1939	173.0 mm (6.8 in)
1940	112.5 mm (4.4 in)
1941	118.6 mm (4.7 in)
1942	77.2 mm (3.0 in)
1943	79.5 mm (3.1 in)
1944	122.0 mm (4.8 in)
1945	111.3 mm (4.4 in)
1946	84.8 mm (3.3 in)
1947	133.6 mm (5.3 in)
1948	101.0 mm (4.0 in)
1949	116.4 mm (4.6 in)
1950	105.3 mm (4.1 in)
1951	118.6 mm (4.7 in)
1952	82.5 mm (3.2 in)
1953	121.6 mm (4.8 in)
1954	181.1 mm (7.1 in)
1955	114.1 mm (4.5 in)
1956	104.0 mm (4.1 in)
1957	101.1 mm (4.0 in)
1958	127.8 mm (5.0 in)
1959	76.0 mm (3.0 in)
1960	106.2 mm (4.2 in)
1961	88.5 mm (3.5 in)
1962	110.5 mm (4.4 in)
1963	119.3 mm (4.7 in)
1964	67.2 mm (2.6 in)
1965	101.9 mm (4.0 in)
1966	167.6 mm (6.6 in)
1967	100.3 mm (3.9 in)
1968	118.1 mm (4.6 in)
1969	97.2 mm (3.8 in)
1970	127.3 mm (5.0 in)
1971	89.7 mm (3.5 in)
1972	154.5 mm (6.1 in)
1973	149.3 mm (5.9 in)
1974	118.3 mm (4.7 in)
1975	167.9 mm (6.6 in)
1976	101.6 mm (4.0 in)
1977	139.6 mm (5.5 in)
1978	124.4 mm (4.9 in)
1979	143.0 mm (5.6 in)
1980	132.0 mm (5.2 in)
1981	82.4 mm (3.2 in)
1982	85.1 mm (3.4 in)
1983	250.8 mm (9.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lois River Dam, 1931 to 1983. The record is 47 days in 1974, marked on the chart; the median year is 24 days.

Longest dry spell (CDD) at Lois River Dam by year
Year	Longest dry spell (CDD)
1931	22 days
1932	19 days
1933	24 days
1934	30 days
1935	25 days
1936	30 days
1937	24 days
1938	26 days
1939	17 days
1940	32 days
1941	19 days
1942	38 days
1943	25 days
1944	25 days
1945	30 days
1946	15 days
1947	22 days
1948	14 days
1949	19 days
1950	27 days
1951	24 days
1952	28 days
1953	12 days
1954	21 days
1955	23 days
1956	27 days
1957	22 days
1958	34 days
1959	28 days
1960	29 days
1961	24 days
1962	15 days
1963	17 days
1964	9 days
1965	20 days
1966	17 days
1967	25 days
1968	23 days
1969	24 days
1970	22 days
1971	20 days
1972	34 days
1973	21 days
1974	47 days
1975	25 days
1976	22 days
1977	23 days
1978	29 days
1979	32 days
1980	29 days
1981	22 days
1982	22 days
1983	25 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

47 years, 1932 to 1983

A day with at least 54.7 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 109.0 mm (4.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Lois River Dam: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	54.7 mm (2.2 in)
5 years	69.7 mm (2.7 in)
10 years	79.5 mm (3.1 in)
25 years	91.5 mm (3.6 in)
50 years	100.4 mm (4.0 in)	Longer than the 47 years of record
100 years	109.0 mm (4.3 in)	Longer than the 47 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, 47 years of values from 1932 to 1983.

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: 104.9 mm (4.1 in) in 1973; 102.3 mm (4.0 in) in 1983; 93.5 mm (3.7 in) in 1938.

Download the Data

Data for Lois River Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lois River 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a