Denman Island Weather Records (CA001022430)

Record envelope, standing records and threshold days for Denman Island (CA001022430), British Columbia, Canada, with 88 years of record.

Key Facts for Denman Island

Denman Island (CA001022430) is a weather station in British Columbia, Canada at 49.52 latitude and -124.78 longitude, 14 m (46 ft) above sea level.
The station reports from 1906 to 1993, 88 years of record.
1,464 records set at Denman Island still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Denman Island set a daily record snowfall of 25.4 cm (10.0 in) on 26 December 1965.

About the Station

Location: British Columbia, Canada, 49.52 latitude, -124.78 longitude.
Elevation: 14 m (46 ft).
Period of record: 1906 to 1993, 88 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 Denman Island. 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 Denman Island, 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)	-12.2 C (10.0 F)	n/a	n/a
Feb	15.6 C (60.1 F)	-7.8 C (18.0 F)	n/a	n/a
Mar	19.4 C (66.9 F)	-9.4 C (15.1 F)	n/a	n/a
Apr	20.6 C (69.1 F)	-3.3 C (26.1 F)	n/a	n/a
May	28.3 C (82.9 F)	-2.8 C (27.0 F)	n/a	n/a
Jun	30.0 C (86.0 F)	1.7 C (35.1 F)	n/a	n/a
Jul	35.6 C (96.1 F)	3.9 C (39.0 F)	n/a	n/a
Aug	33.3 C (91.9 F)	3.9 C (39.0 F)	n/a	n/a
Sep	28.3 C (82.9 F)	0.0 C (32.0 F)	n/a	n/a
Oct	20.6 C (69.1 F)	-2.8 C (27.0 F)	n/a	n/a
Nov	15.6 C (60.1 F)	-5.6 C (21.9 F)	n/a	n/a
Dec	15.0 C (59.0 F)	-12.8 C (9.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Denman Island still stand. 1961 holds the most, with 291.

Wettest Day of Each Month

Jan: 99.6 mm (3.9 in)

The wettest day on record for each calendar month at Denman Island. The most was 99.6 mm (3.9 in) on 5 January 1908.

Record daily precipitation for each month at Denman Island
Month	Record daily precipitation (mm)	Date
Jan	99.6 mm (3.9 in)	5 January 1908
Feb	72.9 mm (2.9 in)	11 February 1960
Mar	73.2 mm (2.9 in)	18 March 1945
Apr	68.6 mm (2.7 in)	10 April 1950
May	55.9 mm (2.2 in)	4 May 1911
Jun	44.2 mm (1.7 in)	1 June 1962
Jul	44.5 mm (1.8 in)	15 July 1934
Aug	37.3 mm (1.5 in)	27 August 1920
Sep	54.1 mm (2.1 in)	20 September 1921
Oct	74.9 mm (2.9 in)	17 October 1940
Nov	78.7 mm (3.1 in)	18 November 1948
Dec	80.3 mm (3.2 in)	30 December 1926

Period of Record Coverage

1960 to 1965

6 years of record at Denman Island, 1960 to 1965. 1 years have data for under 90 percent of days and are left out of rankings: 1960.

Latest Records

Latest records at Denman Island
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 December 1965	Denman Island, CA	daily snowfall	25.4 cm (10.0 in)	12.7 cm (5.0 in)	32 years	29 of 100 (Routine)
5 October 1965	Denman Island, CA	daily rain	44.7 mm (1.8 in)	0.8 mm (0.03 in)	44 years	19 of 100 (Routine)
4 October 1965	Denman Island, CA	daily rain	21.6 mm (0.9 in)	1.3 mm (0.05 in)	15 years	11 of 100 (Routine)
3 October 1965	Denman Island, CA	daily rain	45.0 mm (1.8 in)	24.7 mm (1.0 in)	44 years	39 of 100 (Notable)
19 August 1965	Denman Island, CA	daily rain	18.3 mm (0.7 in)	1.8 mm (0.07 in)	12 years	11 of 100 (Routine)
12 August 1965	Denman Island, CA	daily rain	10.4 mm (0.4 in)	5.1 mm (0.20 in)	20 years	20 of 100 (Routine)
15 May 1965	Denman Island, CA	daily rain	19.8 mm (0.8 in)	9.1 mm (0.36 in)	20 years	20 of 100 (Routine)
26 February 1965	Denman Island, CA	daily snowfall	22.9 cm (9.0 in)	15.3 cm (6.0 in)	29 years	31 of 100 (Routine)
23 January 1965	Denman Island, CA	daily snowfall	20.3 cm (8.0 in)	5.1 cm (2.0 in)	14 years	14 of 100 (Routine)
4 January 1965	Denman Island, CA	daily snowfall	10.2 cm (4.0 in)	2.6 cm (1.0 in)	15 years	12 of 100 (Routine)
19 December 1964	Denman Island, CA	daily snowfall	21.6 cm (8.5 in)	16.5 cm (6.5 in)	50 years	38 of 100 (Notable)
18 December 1964	Denman Island, CA	daily snowfall	29.2 cm (11.5 in)	14.0 cm (5.5 in)	42 years	32 of 100 (Routine)
18 December 1964	Denman Island, CA	daily rain	29.2 mm (1.1 in)	8.1 mm (0.32 in)	30 years	19 of 100 (Routine)
17 December 1964	Denman Island, CA	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	43 years	4 of 100 (Routine)
28 November 1964	Denman Island, CA	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	58 years	52 of 100 (Notable)
19 July 1964	Denman Island, CA	daily rain	8.1 mm (0.32 in)	3.0 mm (0.12 in)	30 years	18 of 100 (Routine)
13 July 1964	Denman Island, CA	daily rain	9.4 mm (0.37 in)	0.5 mm (0.02 in)	57 years	20 of 100 (Routine)
3 June 1964	Denman Island, CA	daily rain	14.5 mm (0.6 in)	1.3 mm (0.05 in)	39 years	18 of 100 (Routine)
10 March 1964	Denman Island, CA	daily rain	47.8 mm (1.9 in)	29.8 mm (1.2 in)	45 years	48 of 100 (Notable)
22 January 1964	Denman Island, CA	daily snowfall	8.6 cm (3.4 in)	1.0 cm (0.4 in)	48 years	19 of 100 (Routine)

Extremes by Year

1906 to 1965

Yearly extremes at Denman Island: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.6 C (96.1 F)	1961	32.2 C (90.0 F)	6
Coldest night (TNn)	-12.8 C (9.0 F)	1964	-9.4 C (15.1 F)	6
Wettest day (Rx1day)	99.6 mm (3.9 in)	1908	57.2 mm (2.3 in)	56
Wettest five days (Rx5day)	228.9 mm (9.0 in)	1908	124.9 mm (4.9 in)	56
Longest dry spell (CDD)	49 days	1916	29 days	56

Hottest day (TXx)

The hottest day of the year at Denman Island, 1906 to 1965. The record is 35.6 C (96.1 F) in 1961, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at Denman Island by year
Year	Hottest day (TXx)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
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
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1960	33.3 C (91.9 F)
1961	35.6 C (96.1 F)
1962	31.1 C (88.0 F)
1963	30.0 C (86.0 F)
1964	28.3 C (82.9 F)
1965	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Denman Island, 1906 to 1965. The record is -12.8 C (9.0 F) in 1964, marked on the chart; the median year is -9.4 C (15.1 F).

Coldest night (TNn) at Denman Island by year
Year	Coldest night (TNn)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
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
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1960	-8.3 C (17.1 F)
1961	-6.7 C (19.9 F)
1962	-9.4 C (15.1 F)
1963	-12.2 C (10.0 F)
1964	-12.8 C (9.0 F)
1965	-9.4 C (15.1 F)

Wettest day (Rx1day)

The wettest day of the year at Denman Island, 1906 to 1965. The record is 99.6 mm (3.9 in) in 1908, marked on the chart; the median year is 57.2 mm (2.3 in).

Wettest day (Rx1day) at Denman Island by year
Year	Wettest day (Rx1day)
1906	55.9 mm (2.2 in)
1907	67.3 mm (2.6 in)
1908	99.6 mm (3.9 in)
1909	43.9 mm (1.7 in)
1910	55.9 mm (2.2 in)
1911	55.9 mm (2.2 in)
1912	47.5 mm (1.9 in)
1913	45.0 mm (1.8 in)
1914	70.6 mm (2.8 in)
1915	69.3 mm (2.7 in)
1916	50.0 mm (2.0 in)
1917	40.4 mm (1.6 in)
1918	54.9 mm (2.2 in)
1919	61.2 mm (2.4 in)
1920	62.0 mm (2.4 in)
1921	57.7 mm (2.3 in)
1922	34.3 mm (1.4 in)
1923	58.7 mm (2.3 in)
1924	69.3 mm (2.7 in)
1925	41.7 mm (1.6 in)
1926	80.3 mm (3.2 in)
1927	59.4 mm (2.3 in)
1928	45.0 mm (1.8 in)
1929	50.3 mm (2.0 in)
1930	35.6 mm (1.4 in)
1931	48.5 mm (1.9 in)
1932	43.7 mm (1.7 in)
1933	53.6 mm (2.1 in)
1934	61.5 mm (2.4 in)
1935	76.2 mm (3.0 in)
1936	45.7 mm (1.8 in)
1937	55.6 mm (2.2 in)
1938	78.7 mm (3.1 in)
1939	53.8 mm (2.1 in)
1940	74.9 mm (2.9 in)
1941	66.0 mm (2.6 in)
1942	44.7 mm (1.8 in)
1943	40.6 mm (1.6 in)
1944	53.3 mm (2.1 in)
1945	73.2 mm (2.9 in)
1946	58.4 mm (2.3 in)
1947	66.8 mm (2.6 in)
1948	78.7 mm (3.1 in)
1949	57.2 mm (2.3 in)
1950	68.6 mm (2.7 in)
1951	72.6 mm (2.9 in)
1952	68.3 mm (2.7 in)
1953	66.8 mm (2.6 in)
1954	71.1 mm (2.8 in)
1955	36.8 mm (1.4 in)
1960	80.0 mm (3.1 in)
1961	57.2 mm (2.3 in)
1962	54.1 mm (2.1 in)
1963	68.3 mm (2.7 in)
1964	47.8 mm (1.9 in)
1965	45.7 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Denman Island, 1906 to 1965. The record is 228.9 mm (9.0 in) in 1908, marked on the chart; the median year is 124.9 mm (4.9 in).

Wettest five days (Rx5day) at Denman Island by year
Year	Wettest five days (Rx5day)
1906	138.6 mm (5.5 in)
1907	130.8 mm (5.1 in)
1908	228.9 mm (9.0 in)
1909	85.6 mm (3.4 in)
1910	106.0 mm (4.2 in)
1911	79.6 mm (3.1 in)
1912	111.0 mm (4.4 in)
1913	160.1 mm (6.3 in)
1914	167.1 mm (6.6 in)
1915	119.3 mm (4.7 in)
1916	97.0 mm (3.8 in)
1917	95.9 mm (3.8 in)
1918	129.3 mm (5.1 in)
1919	129.8 mm (5.1 in)
1920	137.2 mm (5.4 in)
1921	152.5 mm (6.0 in)
1922	115.2 mm (4.5 in)
1923	148.9 mm (5.9 in)
1924	130.8 mm (5.1 in)
1925	95.0 mm (3.7 in)
1926	204.1 mm (8.0 in)
1927	221.3 mm (8.7 in)
1928	108.3 mm (4.3 in)
1929	95.0 mm (3.7 in)
1930	83.7 mm (3.3 in)
1931	123.3 mm (4.9 in)
1932	124.7 mm (4.9 in)
1933	151.9 mm (6.0 in)
1934	113.3 mm (4.5 in)
1935	187.1 mm (7.4 in)
1936	102.4 mm (4.0 in)
1937	123.5 mm (4.9 in)
1938	136.1 mm (5.4 in)
1939	188.6 mm (7.4 in)
1940	121.9 mm (4.8 in)
1941	148.0 mm (5.8 in)
1942	77.7 mm (3.1 in)
1943	79.7 mm (3.1 in)
1944	149.9 mm (5.9 in)
1945	123.0 mm (4.8 in)
1946	100.0 mm (3.9 in)
1947	133.3 mm (5.2 in)
1948	130.2 mm (5.1 in)
1949	124.9 mm (4.9 in)
1950	157.8 mm (6.2 in)
1951	163.1 mm (6.4 in)
1952	121.4 mm (4.8 in)
1953	161.3 mm (6.4 in)
1954	134.3 mm (5.3 in)
1955	11.4 mm (0.4 in)
1960	127.5 mm (5.0 in)
1961	124.8 mm (4.9 in)
1962	105.8 mm (4.2 in)
1963	184.7 mm (7.3 in)
1964	88.6 mm (3.5 in)
1965	117.0 mm (4.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Denman Island, 1906 to 1965. The record is 49 days in 1916, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Denman Island by year
Year	Longest dry spell (CDD)
1906	18 days
1907	25 days
1908	33 days
1909	37 days
1910	39 days
1911	38 days
1912	21 days
1913	21 days
1914	29 days
1915	35 days
1916	49 days
1917	23 days
1918	41 days
1919	33 days
1920	30 days
1921	20 days
1922	44 days
1923	44 days
1924	31 days
1925	39 days
1926	29 days
1927	30 days
1928	36 days
1929	23 days
1930	34 days
1931	24 days
1932	20 days
1933	25 days
1934	31 days
1935	25 days
1936	49 days
1937	21 days
1938	26 days
1939	41 days
1940	38 days
1941	22 days
1942	38 days
1943	31 days
1944	24 days
1945	27 days
1946	25 days
1947	29 days
1948	13 days
1949	30 days
1950	29 days
1951	32 days
1952	30 days
1953	22 days
1954	16 days
1955	18 days
1960	43 days
1961	43 days
1962	16 days
1963	26 days
1964	16 days
1965	20 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

50 years, 1907 to 1965

A day with at least 57.9 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 94.7 mm (3.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Denman Island: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	57.9 mm (2.3 in)
5 years	70.3 mm (2.8 in)
10 years	77.3 mm (3.0 in)
25 years	85.1 mm (3.4 in)
50 years	90.2 mm (3.6 in)
100 years	94.7 mm (3.7 in)	Longer than the 50 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, 50 years of values from 1907 to 1965.

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: 99.6 mm (3.9 in) in 1908; 80.3 mm (3.2 in) in 1926; 80.0 mm (3.1 in) in 1960.

Download the Data

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

Year	Days with data	Share of year	Complete
1960	325	89%	No
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	362	99%	Yes