Ioco Refinery Weather Records (CA001103660)

Record envelope, standing records and threshold days for Ioco Refinery (CA001103660), British Columbia, Canada, with 80 years of record.

Key Facts for Ioco Refinery

Ioco Refinery (CA001103660) is a weather station in British Columbia, Canada at 49.30 latitude and -122.88 longitude, 53 m (174 ft) above sea level.
The station reports from 1916 to 1995, 80 years of record.
0 records set at Ioco Refinery still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Ioco Refinery set a daily record precipitation of 52.4 mm (2.1 in) on 1 September 1983.

About the Station

Location: British Columbia, Canada, 49.30 latitude, -122.88 longitude.
Elevation: 53 m (174 ft).
Period of record: 1916 to 1995, 80 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 Ioco Refinery. 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 Ioco Refinery, 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 Ioco Refinery still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Ioco Refinery between 19 October 1956 and 19 October 1956. Each dot is a new record.

Wettest Day of Each Month

Oct: 136.1 mm (5.4 in)

The wettest day on record for each calendar month at Ioco Refinery. The most was 136.1 mm (5.4 in) on 19 October 1956.

Record daily precipitation for each month at Ioco Refinery
Month	Record daily precipitation (mm)	Date
Jan	112.0 mm (4.4 in)	23 January 1935
Feb	108.5 mm (4.3 in)	10 February 1924
Mar	79.5 mm (3.1 in)	25 March 1946
Apr	77.0 mm (3.0 in)	10 April 1946
May	83.1 mm (3.3 in)	31 May 1938
Jun	69.1 mm (2.7 in)	20 June 1932
Jul	78.0 mm (3.1 in)	11 July 1983
Aug	85.1 mm (3.4 in)	12 August 1966
Sep	118.6 mm (4.7 in)	16 September 1968
Oct	136.1 mm (5.4 in)	19 October 1956
Nov	121.9 mm (4.8 in)	14 November 1919
Dec	126.2 mm (5.0 in)	13 December 1979

Latest Records

Latest records at Ioco Refinery
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 September 1983	Ioco Refinery, CA	daily rain	52.4 mm (2.1 in)	10.4 mm (0.4 in)	2 years	13 of 100 (Routine)
11 July 1983	Ioco Refinery, CA	monthly rain	78.0 mm (3.1 in)	10.4 mm (0.4 in)	10 years	30 of 100 (Routine)
19 February 1983	Ioco Refinery, CA	daily rain	55.0 mm (2.2 in)	3.7 mm (0.15 in)	21 years	14 of 100 (Routine)
9 January 1983	Ioco Refinery, CA	daily rain	88.0 mm (3.5 in)	41.0 mm (1.6 in)	21 years	37 of 100 (Notable)
29 August 1982	Ioco Refinery, CA	daily rain	29.6 mm (1.2 in)	15.1 mm (0.6 in)	44 years	31 of 100 (Routine)
13 July 1982	Ioco Refinery, CA	daily rain	12.6 mm (0.5 in)	2.9 mm (0.11 in)	28 years	17 of 100 (Routine)
2 July 1982	Ioco Refinery, CA	daily rain	30.0 mm (1.2 in)	8.7 mm (0.34 in)	45 years	28 of 100 (Routine)
26 June 1982	Ioco Refinery, CA	daily rain	18.0 mm (0.7 in)	5.0 mm (0.20 in)	13 years	15 of 100 (Routine)
22 February 1982	Ioco Refinery, CA	daily snowfall	3.5 cm (1.4 in)	2.2 cm (0.9 in)	64 years	20 of 100 (Routine)
18 February 1982	Ioco Refinery, CA	daily rain	45.2 mm (1.8 in)	5.8 mm (0.23 in)	28 years	18 of 100 (Routine)
12 February 1982	Ioco Refinery, CA	daily rain	68.0 mm (2.7 in)	30.7 mm (1.2 in)	32 years	36 of 100 (Notable)
31 December 1981	Ioco Refinery, CA	daily snowfall	21.0 cm (8.3 in)	0.7 cm (0.3 in)	12 years	10 of 100 (Routine)
31 October 1981	Ioco Refinery, CA	daily rain	91.0 mm (3.6 in)	58.5 mm (2.3 in)	47 years	53 of 100 (Notable)
30 October 1981	Ioco Refinery, CA	daily rain	83.0 mm (3.3 in)	27.9 mm (1.1 in)	39 years	33 of 100 (Routine)
18 June 1981	Ioco Refinery, CA	daily rain	27.2 mm (1.1 in)	2.6 mm (0.10 in)	24 years	15 of 100 (Routine)
5 June 1981	Ioco Refinery, CA	daily rain	28.4 mm (1.1 in)	11.1 mm (0.4 in)	52 years	32 of 100 (Routine)
22 April 1981	Ioco Refinery, CA	daily rain	36.2 mm (1.4 in)	12.3 mm (0.5 in)	32 years	27 of 100 (Routine)
21 April 1981	Ioco Refinery, CA	daily rain	41.4 mm (1.6 in)	9.6 mm (0.38 in)	16 years	20 of 100 (Routine)
30 March 1981	Ioco Refinery, CA	daily rain	64.6 mm (2.5 in)	2.6 mm (0.10 in)	48 years	22 of 100 (Routine)
28 March 1981	Ioco Refinery, CA	daily rain	38.4 mm (1.5 in)	7.2 mm (0.28 in)	16 years	16 of 100 (Routine)

Extremes by Year

1916 to 1983

Yearly extremes at Ioco Refinery: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	136.1 mm (5.4 in)	1956	80.0 mm (3.1 in)	68
Wettest five days (Rx5day)	435.3 mm (17.1 in)	1935	174.0 mm (6.8 in)	68
Longest dry spell (CDD)	49 days	1936	22 days	68

Wettest day (Rx1day)

The wettest day of the year at Ioco Refinery, 1916 to 1983. The record is 136.1 mm (5.4 in) in 1956, marked on the chart; the median year is 80.0 mm (3.1 in).

Wettest day (Rx1day) at Ioco Refinery by year
Year	Wettest day (Rx1day)
1916	48.0 mm (1.9 in)
1917	91.4 mm (3.6 in)
1918	102.9 mm (4.1 in)
1919	121.9 mm (4.8 in)
1920	73.2 mm (2.9 in)
1921	121.7 mm (4.8 in)
1922	66.0 mm (2.6 in)
1923	117.3 mm (4.6 in)
1924	108.5 mm (4.3 in)
1925	110.2 mm (4.3 in)
1926	52.6 mm (2.1 in)
1927	56.1 mm (2.2 in)
1928	53.6 mm (2.1 in)
1929	77.7 mm (3.1 in)
1930	90.7 mm (3.6 in)
1931	96.8 mm (3.8 in)
1932	103.6 mm (4.1 in)
1933	82.8 mm (3.3 in)
1934	71.4 mm (2.8 in)
1935	112.0 mm (4.4 in)
1936	75.9 mm (3.0 in)
1937	79.0 mm (3.1 in)
1938	83.1 mm (3.3 in)
1939	69.9 mm (2.8 in)
1940	109.0 mm (4.3 in)
1941	83.3 mm (3.3 in)
1942	66.8 mm (2.6 in)
1943	83.8 mm (3.3 in)
1944	67.6 mm (2.7 in)
1945	73.7 mm (2.9 in)
1946	79.5 mm (3.1 in)
1947	109.5 mm (4.3 in)
1948	78.0 mm (3.1 in)
1949	67.1 mm (2.6 in)
1950	82.8 mm (3.3 in)
1951	84.3 mm (3.3 in)
1952	56.9 mm (2.2 in)
1953	75.9 mm (3.0 in)
1954	101.3 mm (4.0 in)
1955	119.9 mm (4.7 in)
1956	136.1 mm (5.4 in)
1957	42.7 mm (1.7 in)
1958	69.1 mm (2.7 in)
1959	69.3 mm (2.7 in)
1960	67.1 mm (2.6 in)
1961	84.6 mm (3.3 in)
1962	98.6 mm (3.9 in)
1963	71.1 mm (2.8 in)
1964	74.9 mm (2.9 in)
1965	55.6 mm (2.2 in)
1966	87.9 mm (3.5 in)
1967	84.3 mm (3.3 in)
1968	118.6 mm (4.7 in)
1969	50.8 mm (2.0 in)
1970	45.7 mm (1.8 in)
1971	79.5 mm (3.1 in)
1972	67.6 mm (2.7 in)
1973	60.2 mm (2.4 in)
1974	73.2 mm (2.9 in)
1975	94.0 mm (3.7 in)
1976	54.6 mm (2.1 in)
1977	80.5 mm (3.2 in)
1978	48.0 mm (1.9 in)
1979	126.2 mm (5.0 in)
1980	82.6 mm (3.3 in)
1981	91.0 mm (3.6 in)
1982	81.6 mm (3.2 in)
1983	88.0 mm (3.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ioco Refinery, 1916 to 1983. The record is 435.3 mm (17.1 in) in 1935, marked on the chart; the median year is 174.0 mm (6.8 in).

Wettest five days (Rx5day) at Ioco Refinery by year
Year	Wettest five days (Rx5day)
1916	111.5 mm (4.4 in)
1917	231.2 mm (9.1 in)
1918	248.2 mm (9.8 in)
1919	255.7 mm (10.1 in)
1920	192.1 mm (7.6 in)
1921	283.0 mm (11.1 in)
1922	173.0 mm (6.8 in)
1923	224.8 mm (8.9 in)
1924	218.9 mm (8.6 in)
1925	174.5 mm (6.9 in)
1926	107.7 mm (4.2 in)
1927	103.4 mm (4.1 in)
1928	183.9 mm (7.2 in)
1929	163.3 mm (6.4 in)
1930	173.4 mm (6.8 in)
1931	229.2 mm (9.0 in)
1932	218.6 mm (8.6 in)
1933	175.6 mm (6.9 in)
1934	163.9 mm (6.5 in)
1935	435.3 mm (17.1 in)
1936	144.5 mm (5.7 in)
1937	167.7 mm (6.6 in)
1938	214.2 mm (8.4 in)
1939	236.3 mm (9.3 in)
1940	181.5 mm (7.1 in)
1941	200.7 mm (7.9 in)
1942	124.2 mm (4.9 in)
1943	172.5 mm (6.8 in)
1944	148.1 mm (5.8 in)
1945	160.6 mm (6.3 in)
1946	159.3 mm (6.3 in)
1947	260.3 mm (10.2 in)
1948	187.2 mm (7.4 in)
1949	188.7 mm (7.4 in)
1950	170.9 mm (6.7 in)
1951	241.5 mm (9.5 in)
1952	93.9 mm (3.7 in)
1953	131.1 mm (5.2 in)
1954	210.3 mm (8.3 in)
1955	188.2 mm (7.4 in)
1956	211.8 mm (8.3 in)
1957	97.4 mm (3.8 in)
1958	142.0 mm (5.6 in)
1959	171.1 mm (6.7 in)
1960	138.1 mm (5.4 in)
1961	219.5 mm (8.6 in)
1962	216.8 mm (8.5 in)
1963	231.6 mm (9.1 in)
1964	143.9 mm (5.7 in)
1965	144.5 mm (5.7 in)
1966	222.8 mm (8.8 in)
1967	142.4 mm (5.6 in)
1968	351.1 mm (13.8 in)
1969	94.3 mm (3.7 in)
1970	85.6 mm (3.4 in)
1971	105.6 mm (4.2 in)
1972	114.6 mm (4.5 in)
1973	109.9 mm (4.3 in)
1974	148.8 mm (5.9 in)
1975	207.8 mm (8.2 in)
1976	160.5 mm (6.3 in)
1977	130.8 mm (5.1 in)
1978	107.4 mm (4.2 in)
1979	294.4 mm (11.6 in)
1980	175.3 mm (6.9 in)
1981	201.4 mm (7.9 in)
1982	166.2 mm (6.5 in)
1983	230.8 mm (9.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ioco Refinery, 1916 to 1983. The record is 49 days in 1936, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Ioco Refinery by year
Year	Longest dry spell (CDD)
1916	27 days
1917	22 days
1918	37 days
1919	24 days
1920	29 days
1921	15 days
1922	47 days
1923	30 days
1924	22 days
1925	21 days
1926	13 days
1927	18 days
1928	38 days
1929	23 days
1930	20 days
1931	29 days
1932	16 days
1933	13 days
1934	30 days
1935	21 days
1936	49 days
1937	22 days
1938	21 days
1939	38 days
1940	32 days
1941	21 days
1942	27 days
1943	23 days
1944	19 days
1945	32 days
1946	25 days
1947	15 days
1948	12 days
1949	16 days
1950	19 days
1951	38 days
1952	28 days
1953	14 days
1954	14 days
1955	24 days
1956	27 days
1957	23 days
1958	35 days
1959	21 days
1960	44 days
1961	40 days
1962	15 days
1963	18 days
1964	10 days
1965	19 days
1966	17 days
1967	30 days
1968	24 days
1969	24 days
1970	14 days
1971	20 days
1972	33 days
1973	40 days
1974	21 days
1975	16 days
1976	16 days
1977	24 days
1978	15 days
1979	36 days
1980	15 days
1981	31 days
1982	20 days
1983	17 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

53 years, 1917 to 1983

A day with at least 83.1 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 143.5 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Ioco Refinery: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	83.1 mm (3.3 in)
5 years	102.2 mm (4.0 in)
10 years	113.5 mm (4.5 in)
25 years	126.6 mm (5.0 in)
50 years	135.4 mm (5.3 in)
100 years	143.5 mm (5.6 in)	Longer than the 53 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, 53 years of values from 1917 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: 136.1 mm (5.4 in) in 1956; 121.9 mm (4.8 in) in 1919; 121.7 mm (4.8 in) in 1921.

Download the Data

Data for Ioco Refinery standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ioco Refinery 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 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