West Swan Weather Records (ASN00009163)

Record envelope, standing records and threshold days for West Swan (ASN00009163), Australia, with 88 years of record.

Key Facts for West Swan

West Swan (ASN00009163) is a weather station in Australia at -31.85 latitude and 115.99 longitude, 9 m (30 ft) above sea level.
The station reports from 1917 to 2004, 88 years of record.
0 records set at West Swan still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
West Swan set a daily record precipitation of 43.6 mm (1.7 in) on 7 June 2004.

About the Station

Location: Australia, -31.85 latitude, 115.99 longitude.
Elevation: 9 m (30 ft).
Period of record: 1917 to 2004, 88 years.
Eligible elements: prcp.

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 West Swan. 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 West Swan, 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 West Swan still stand.

All-Time Record Progression

1 new records

1 all-time records were set at West Swan between 30 July 2001 and 30 July 2001. Each dot is a new record.

Wettest Day of Each Month

Jul: 133.0 mm (5.2 in)

The wettest day on record for each calendar month at West Swan. The most was 133.0 mm (5.2 in) on 30 July 2001.

Record daily precipitation for each month at West Swan
Month	Record daily precipitation (mm)	Date
Jan	88.0 mm (3.5 in)	29 January 1990
Feb	87.0 mm (3.4 in)	9 February 1992
Mar	87.9 mm (3.5 in)	9 March 1934
Apr	90.2 mm (3.6 in)	16 April 1926
May	82.0 mm (3.2 in)	25 May 1963
Jun	89.7 mm (3.5 in)	10 June 1920
Jul	133.0 mm (5.2 in)	30 July 2001
Aug	58.4 mm (2.3 in)	14 August 1945
Sep	40.9 mm (1.6 in)	14 September 1947
Oct	57.8 mm (2.3 in)	18 October 1995
Nov	34.5 mm (1.4 in)	15 November 1948
Dec	37.3 mm (1.5 in)	10 December 1919

Latest Records

Latest records at West Swan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 June 2004	West Swan, AU	daily rain	43.6 mm (1.7 in)	0.7 mm (0.03 in)	58 years	25 of 100 (Routine)
18 November 2003	West Swan, AU	daily rain	8.6 mm (0.34 in)	2.8 mm (0.11 in)	34 years	20 of 100 (Routine)
22 August 2003	West Swan, AU	daily rain	40.8 mm (1.6 in)	7.8 mm (0.31 in)	78 years	40 of 100 (Notable)
1 November 2002	West Swan, AU	daily rain	19.4 mm (0.8 in)	10.5 mm (0.4 in)	36 years	20 of 100 (Routine)
17 April 2002	West Swan, AU	daily rain	42.6 mm (1.7 in)	27.1 mm (1.1 in)	76 years	61 of 100 (Major)
23 March 2002	West Swan, AU	daily rain	2.2 mm (0.09 in)	0.2 mm (0.01 in)	13 years	12 of 100 (Routine)
5 December 2001	West Swan, AU	daily rain	2.6 mm (0.10 in)	1.2 mm (0.05 in)	16 years	14 of 100 (Routine)
19 November 2001	West Swan, AU	daily rain	18.6 mm (0.7 in)	0.6 mm (0.02 in)	27 years	17 of 100 (Routine)
9 August 2001	West Swan, AU	daily rain	38.2 mm (1.5 in)	6.4 mm (0.25 in)	80 years	39 of 100 (Notable)
30 July 2001	West Swan, AU	all-time rain	133.0 mm (5.2 in)	42.8 mm (1.7 in)	75 years	90 of 100 (Exceptional)
1 February 2001	West Swan, AU	daily rain	7.6 mm (0.30 in)	3.5 mm (0.14 in)	30 years	19 of 100 (Routine)
27 November 2000	West Swan, AU	daily rain	7.8 mm (0.31 in)	1.4 mm (0.06 in)	74 years	20 of 100 (Routine)
31 August 2000	West Swan, AU	daily rain	27.4 mm (1.1 in)	14.7 mm (0.6 in)	82 years	49 of 100 (Notable)
22 January 2000	West Swan, AU	daily rain	30.2 mm (1.2 in)	4.2 mm (0.17 in)	17 years	17 of 100 (Routine)
15 January 2000	West Swan, AU	daily rain	15.2 mm (0.6 in)	11.9 mm (0.5 in)	45 years	20 of 100 (Routine)
13 December 1999	West Swan, AU	daily rain	2.8 mm (0.11 in)	1.5 mm (0.06 in)	68 years	20 of 100 (Routine)
14 October 1999	West Swan, AU	daily rain	19.6 mm (0.8 in)	4.4 mm (0.17 in)	74 years	20 of 100 (Routine)
8 October 1999	West Swan, AU	daily rain	38.4 mm (1.5 in)	22.4 mm (0.9 in)	66 years	63 of 100 (Major)
11 September 1999	West Swan, AU	daily rain	32.2 mm (1.3 in)	5.0 mm (0.20 in)	4 years	16 of 100 (Routine)
3 September 1999	West Swan, AU	daily rain	23.4 mm (0.9 in)	5.1 mm (0.20 in)	80 years	20 of 100 (Routine)

Extremes by Year

1917 to 2004

Yearly extremes at West Swan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	133.0 mm (5.2 in)	2001	43.6 mm (1.7 in)	87
Wettest five days (Rx5day)	195.9 mm (7.7 in)	1945	85.6 mm (3.4 in)	87
Longest dry spell (CDD)	120 days	1994	49 days	87

Wettest day (Rx1day)

The wettest day of the year at West Swan, 1917 to 2004. The record is 133.0 mm (5.2 in) in 2001, marked on the chart; the median year is 43.6 mm (1.7 in).

Wettest day (Rx1day) at West Swan by year
Year	Wettest day (Rx1day)
1917	29.0 mm (1.1 in)
1918	39.4 mm (1.6 in)
1919	48.3 mm (1.9 in)
1920	89.7 mm (3.5 in)
1921	66.8 mm (2.6 in)
1922	45.7 mm (1.8 in)
1923	52.1 mm (2.1 in)
1924	46.5 mm (1.8 in)
1925	40.4 mm (1.6 in)
1926	90.2 mm (3.6 in)
1927	32.3 mm (1.3 in)
1928	63.0 mm (2.5 in)
1929	53.3 mm (2.1 in)
1930	73.7 mm (2.9 in)
1931	43.2 mm (1.7 in)
1932	71.1 mm (2.8 in)
1933	47.0 mm (1.9 in)
1934	87.9 mm (3.5 in)
1935	48.3 mm (1.9 in)
1936	64.8 mm (2.6 in)
1937	48.5 mm (1.9 in)
1938	33.0 mm (1.3 in)
1939	57.4 mm (2.3 in)
1940	45.7 mm (1.8 in)
1941	36.3 mm (1.4 in)
1942	43.4 mm (1.7 in)
1943	40.1 mm (1.6 in)
1944	49.5 mm (1.9 in)
1945	65.8 mm (2.6 in)
1946	42.9 mm (1.7 in)
1947	54.9 mm (2.2 in)
1948	63.0 mm (2.5 in)
1949	33.8 mm (1.3 in)
1950	35.3 mm (1.4 in)
1951	46.7 mm (1.8 in)
1952	41.9 mm (1.6 in)
1953	37.1 mm (1.5 in)
1954	48.0 mm (1.9 in)
1955	54.1 mm (2.1 in)
1956	33.3 mm (1.3 in)
1957	48.8 mm (1.9 in)
1958	42.9 mm (1.7 in)
1959	37.8 mm (1.5 in)
1960	33.0 mm (1.3 in)
1961	30.0 mm (1.2 in)
1962	2.5 mm (0.10 in)
1963	82.0 mm (3.2 in)
1965	37.6 mm (1.5 in)
1966	33.0 mm (1.3 in)
1967	56.4 mm (2.2 in)
1968	56.6 mm (2.2 in)
1969	40.6 mm (1.6 in)
1970	32.5 mm (1.3 in)
1971	28.7 mm (1.1 in)
1972	37.8 mm (1.5 in)
1973	36.1 mm (1.4 in)
1974	37.0 mm (1.5 in)
1975	29.8 mm (1.2 in)
1976	36.0 mm (1.4 in)
1977	38.2 mm (1.5 in)
1978	41.6 mm (1.6 in)
1979	32.0 mm (1.3 in)
1980	57.0 mm (2.2 in)
1981	50.6 mm (2.0 in)
1982	41.6 mm (1.6 in)
1983	38.6 mm (1.5 in)
1984	37.0 mm (1.5 in)
1985	49.4 mm (1.9 in)
1986	75.2 mm (3.0 in)
1987	70.6 mm (2.8 in)
1988	47.6 mm (1.9 in)
1989	39.4 mm (1.6 in)
1990	88.0 mm (3.5 in)
1991	33.2 mm (1.3 in)
1992	87.0 mm (3.4 in)
1993	54.6 mm (2.1 in)
1994	43.4 mm (1.7 in)
1995	57.8 mm (2.3 in)
1996	54.6 mm (2.1 in)
1997	46.2 mm (1.8 in)
1998	42.0 mm (1.7 in)
1999	42.6 mm (1.7 in)
2000	38.8 mm (1.5 in)
2001	133.0 mm (5.2 in)
2002	42.6 mm (1.7 in)
2003	46.2 mm (1.8 in)
2004	43.6 mm (1.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at West Swan, 1917 to 2004. The record is 195.9 mm (7.7 in) in 1945, marked on the chart; the median year is 85.6 mm (3.4 in).

Wettest five days (Rx5day) at West Swan by year
Year	Wettest five days (Rx5day)
1917	46.0 mm (1.8 in)
1918	84.6 mm (3.3 in)
1919	106.2 mm (4.2 in)
1920	147.9 mm (5.8 in)
1921	113.0 mm (4.4 in)
1922	72.4 mm (2.9 in)
1923	109.7 mm (4.3 in)
1924	89.5 mm (3.5 in)
1925	73.8 mm (2.9 in)
1926	144.6 mm (5.7 in)
1927	79.8 mm (3.1 in)
1928	141.1 mm (5.6 in)
1929	93.8 mm (3.7 in)
1930	153.5 mm (6.0 in)
1931	103.6 mm (4.1 in)
1932	133.9 mm (5.3 in)
1933	81.8 mm (3.2 in)
1934	111.7 mm (4.4 in)
1935	75.8 mm (3.0 in)
1936	115.7 mm (4.6 in)
1937	84.6 mm (3.3 in)
1938	79.5 mm (3.1 in)
1939	140.5 mm (5.5 in)
1940	68.6 mm (2.7 in)
1941	71.1 mm (2.8 in)
1942	123.9 mm (4.9 in)
1943	117.8 mm (4.6 in)
1944	61.8 mm (2.4 in)
1945	195.9 mm (7.7 in)
1946	96.5 mm (3.8 in)
1947	130.4 mm (5.1 in)
1948	102.9 mm (4.1 in)
1949	65.0 mm (2.6 in)
1950	73.8 mm (2.9 in)
1951	69.6 mm (2.7 in)
1952	84.6 mm (3.3 in)
1953	72.8 mm (2.9 in)
1954	82.0 mm (3.2 in)
1955	122.7 mm (4.8 in)
1956	97.8 mm (3.9 in)
1957	101.7 mm (4.0 in)
1958	111.8 mm (4.4 in)
1959	57.1 mm (2.2 in)
1960	74.4 mm (2.9 in)
1961	58.7 mm (2.3 in)
1962	2.5 mm (0.10 in)
1963	131.1 mm (5.2 in)
1965	122.7 mm (4.8 in)
1966	73.6 mm (2.9 in)
1967	98.3 mm (3.9 in)
1968	83.5 mm (3.3 in)
1969	81.2 mm (3.2 in)
1970	72.9 mm (2.9 in)
1971	50.5 mm (2.0 in)
1972	74.6 mm (2.9 in)
1973	70.1 mm (2.8 in)
1974	81.4 mm (3.2 in)
1975	70.6 mm (2.8 in)
1976	61.0 mm (2.4 in)
1977	80.4 mm (3.2 in)
1978	106.0 mm (4.2 in)
1979	71.4 mm (2.8 in)
1980	85.6 mm (3.4 in)
1981	115.2 mm (4.5 in)
1982	76.2 mm (3.0 in)
1983	89.0 mm (3.5 in)
1984	50.0 mm (2.0 in)
1985	65.4 mm (2.6 in)
1986	130.2 mm (5.1 in)
1987	94.8 mm (3.7 in)
1988	83.6 mm (3.3 in)
1989	61.6 mm (2.4 in)
1990	91.8 mm (3.6 in)
1991	105.8 mm (4.2 in)
1992	92.2 mm (3.6 in)
1993	64.4 mm (2.5 in)
1994	67.2 mm (2.6 in)
1995	113.8 mm (4.5 in)
1996	149.0 mm (5.9 in)
1997	92.0 mm (3.6 in)
1998	93.6 mm (3.7 in)
1999	55.6 mm (2.2 in)
2000	89.2 mm (3.5 in)
2001	152.0 mm (6.0 in)
2002	60.0 mm (2.4 in)
2003	94.6 mm (3.7 in)
2004	94.8 mm (3.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at West Swan, 1917 to 2004. The record is 120 days in 1994, marked on the chart; the median year is 49 days.

Longest dry spell (CDD) at West Swan by year
Year	Longest dry spell (CDD)
1917	30 days
1918	37 days
1919	37 days
1920	52 days
1921	49 days
1922	46 days
1923	59 days
1924	53 days
1925	23 days
1926	44 days
1927	53 days
1928	56 days
1929	42 days
1930	60 days
1931	60 days
1932	68 days
1933	47 days
1934	41 days
1935	37 days
1936	61 days
1937	41 days
1938	58 days
1939	52 days
1940	43 days
1941	60 days
1942	56 days
1943	35 days
1944	69 days
1945	84 days
1946	35 days
1947	64 days
1948	50 days
1949	42 days
1950	76 days
1951	44 days
1952	87 days
1953	73 days
1954	80 days
1955	49 days
1956	60 days
1957	71 days
1958	69 days
1959	58 days
1960	83 days
1961	6 days
1962	70 days
1963	22 days
1965	84 days
1966	38 days
1967	43 days
1968	33 days
1969	53 days
1970	54 days
1971	38 days
1972	83 days
1973	79 days
1974	58 days
1975	66 days
1976	43 days
1977	37 days
1978	32 days
1979	52 days
1980	41 days
1981	48 days
1982	40 days
1983	40 days
1984	52 days
1985	40 days
1986	42 days
1987	73 days
1988	82 days
1989	40 days
1990	27 days
1991	55 days
1992	34 days
1993	45 days
1994	120 days
1995	31 days
1996	36 days
1997	53 days
1998	52 days
1999	44 days
2000	38 days
2001	41 days
2002	31 days
2003	32 days
2004	61 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

77 years, 1918 to 2003

A day with at least 45.6 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 121.4 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at West Swan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	45.6 mm (1.8 in)
5 years	59.6 mm (2.3 in)
10 years	71.0 mm (2.8 in)
25 years	88.3 mm (3.5 in)
50 years	103.7 mm (4.1 in)
100 years	121.4 mm (4.8 in)	Longer than the 77 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, 77 years of values from 1918 to 2003.

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: 133.0 mm (5.2 in) in 2001; 90.2 mm (3.6 in) in 1926; 89.7 mm (3.5 in) in 1920.

Download the Data

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