Mortlake Weather Records (ASN00090058)

Record envelope, standing records and threshold days for Mortlake (ASN00090058), Australia, with 118 years of record.

Key Facts for Mortlake

Mortlake (ASN00090058) is a weather station in Australia at -38.09 latitude and 142.79 longitude, 130 m (427 ft) above sea level.
The station reports from 1879 to 1996, 118 years of record.
0 records set at Mortlake still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Mortlake set a daily record precipitation of 17.0 mm (0.7 in) on 1 May 1995.

About the Station

Location: Australia, -38.09 latitude, 142.79 longitude.
Elevation: 130 m (427 ft).
Period of record: 1879 to 1996, 118 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 Mortlake. 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 Mortlake, 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 Mortlake still stand.

All-Time Record Progression

2 new records

2 all-time records were set at Mortlake between 7 March 1910 and 8 February 1911. Each dot is a new record.

When Mortlake set new all-time records
Date	Kind	Detail
1910-03-07	Record daily precipitation	Record daily precipitation 83.3 mm (3.3 in)
1911-02-08	Record daily precipitation	Record daily precipitation 89.4 mm (3.5 in)

Wettest Day of Each Month

Feb: 89.4 mm (3.5 in)

The wettest day on record for each calendar month at Mortlake. The most was 89.4 mm (3.5 in) on 8 February 1911.

Record daily precipitation for each month at Mortlake
Month	Record daily precipitation (mm)	Date
Jan	83.6 mm (3.3 in)	27 January 1959
Feb	89.4 mm (3.5 in)	8 February 1911
Mar	83.3 mm (3.3 in)	7 March 1910
Apr	70.6 mm (2.8 in)	24 April 1961
May	39.1 mm (1.5 in)	14 May 1945
Jun	69.3 mm (2.7 in)	25 June 1891
Jul	34.8 mm (1.4 in)	30 July 1923
Aug	63.2 mm (2.5 in)	5 August 1899
Sep	62.2 mm (2.4 in)	30 September 1953
Oct	46.5 mm (1.8 in)	7 October 1894
Nov	57.7 mm (2.3 in)	28 November 1906
Dec	62.7 mm (2.5 in)	3 December 1905

Latest Records

Latest records at Mortlake
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1995	Mortlake, AU	daily rain	17.0 mm (0.7 in)	2.3 mm (0.09 in)	64 years	20 of 100 (Routine)
2 November 1993	Mortlake, AU	daily rain	42.2 mm (1.7 in)	23.4 mm (0.9 in)	90 years	72 of 100 (Major)
8 July 1993	Mortlake, AU	daily rain	28.6 mm (1.1 in)	8.8 mm (0.35 in)	96 years	58 of 100 (Notable)
31 October 1992	Mortlake, AU	daily rain	25.2 mm (1.0 in)	6.7 mm (0.26 in)	44 years	34 of 100 (Routine)
29 September 1992	Mortlake, AU	daily rain	27.4 mm (1.1 in)	11.2 mm (0.4 in)	10 years	33 of 100 (Routine)
10 June 1992	Mortlake, AU	daily rain	17.6 mm (0.7 in)	4.1 mm (0.16 in)	107 years	20 of 100 (Routine)
17 September 1991	Mortlake, AU	daily rain	23.4 mm (0.9 in)	4.1 mm (0.16 in)	32 years	20 of 100 (Routine)
11 October 1990	Mortlake, AU	daily rain	36.2 mm (1.4 in)	17.7 mm (0.7 in)	55 years	56 of 100 (Notable)
28 June 1990	Mortlake, AU	daily rain	14.0 mm (0.6 in)	3.8 mm (0.15 in)	12 years	20 of 100 (Routine)
2 February 1990	Mortlake, AU	daily rain	29.4 mm (1.2 in)	10.4 mm (0.4 in)	16 years	25 of 100 (Routine)
21 July 1989	Mortlake, AU	daily rain	18.0 mm (0.7 in)	4.0 mm (0.16 in)	24 years	20 of 100 (Routine)
28 April 1989	Mortlake, AU	daily rain	17.0 mm (0.7 in)	0.5 mm (0.02 in)	18 years	15 of 100 (Routine)
11 January 1989	Mortlake, AU	daily rain	7.6 mm (0.30 in)	1.2 mm (0.05 in)	73 years	20 of 100 (Routine)
24 November 1988	Mortlake, AU	daily rain	23.8 mm (0.9 in)	3.7 mm (0.15 in)	75 years	20 of 100 (Routine)
7 June 1988	Mortlake, AU	daily rain	23.0 mm (0.9 in)	8.3 mm (0.33 in)	88 years	20 of 100 (Routine)
2 December 1987	Mortlake, AU	daily rain	37.6 mm (1.5 in)	24.1 mm (0.9 in)	52 years	64 of 100 (Major)
26 May 1987	Mortlake, AU	daily rain	23.4 mm (0.9 in)	4.3 mm (0.17 in)	22 years	20 of 100 (Routine)
13 May 1987	Mortlake, AU	daily rain	23.6 mm (0.9 in)	2.8 mm (0.11 in)	102 years	20 of 100 (Routine)
20 February 1987	Mortlake, AU	daily rain	37.0 mm (1.5 in)	28.9 mm (1.1 in)	63 years	60 of 100 (Major)
17 December 1986	Mortlake, AU	daily rain	37.0 mm (1.5 in)	21.5 mm (0.8 in)	65 years	64 of 100 (Major)

Extremes by Year

1879 to 1996

Yearly extremes at Mortlake: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	89.4 mm (3.5 in)	1911	34.5 mm (1.4 in)	118
Wettest five days (Rx5day)	160.3 mm (6.3 in)	1910	53.2 mm (2.1 in)	118
Longest dry spell (CDD)	42 days	1914	21 days	118

Wettest day (Rx1day)

The wettest day of the year at Mortlake, 1879 to 1996. The record is 89.4 mm (3.5 in) in 1911, marked on the chart; the median year is 34.5 mm (1.4 in).

Wettest day (Rx1day) at Mortlake by year
Year	Wettest day (Rx1day)
1879	22.9 mm (0.9 in)
1880	26.2 mm (1.0 in)
1881	41.7 mm (1.6 in)
1882	43.7 mm (1.7 in)
1883	25.4 mm (1.0 in)
1884	28.4 mm (1.1 in)
1885	27.7 mm (1.1 in)
1886	36.8 mm (1.4 in)
1887	27.9 mm (1.1 in)
1888	25.4 mm (1.0 in)
1889	62.5 mm (2.5 in)
1890	21.6 mm (0.9 in)
1891	69.3 mm (2.7 in)
1892	24.9 mm (1.0 in)
1893	32.0 mm (1.3 in)
1894	46.5 mm (1.8 in)
1895	33.0 mm (1.3 in)
1896	42.4 mm (1.7 in)
1897	25.7 mm (1.0 in)
1898	19.3 mm (0.8 in)
1899	63.2 mm (2.5 in)
1900	31.2 mm (1.2 in)
1901	21.6 mm (0.9 in)
1902	22.6 mm (0.9 in)
1903	34.3 mm (1.4 in)
1904	22.1 mm (0.9 in)
1905	62.7 mm (2.5 in)
1906	57.7 mm (2.3 in)
1907	35.8 mm (1.4 in)
1908	44.5 mm (1.8 in)
1909	36.3 mm (1.4 in)
1910	83.3 mm (3.3 in)
1911	89.4 mm (3.5 in)
1912	19.6 mm (0.8 in)
1913	51.1 mm (2.0 in)
1914	20.1 mm (0.8 in)
1915	20.8 mm (0.8 in)
1916	35.3 mm (1.4 in)
1917	30.7 mm (1.2 in)
1918	27.9 mm (1.1 in)
1919	25.7 mm (1.0 in)
1920	39.4 mm (1.6 in)
1921	27.9 mm (1.1 in)
1922	38.1 mm (1.5 in)
1923	34.8 mm (1.4 in)
1924	35.3 mm (1.4 in)
1925	35.1 mm (1.4 in)
1926	24.6 mm (1.0 in)
1927	30.5 mm (1.2 in)
1928	51.8 mm (2.0 in)
1929	36.3 mm (1.4 in)
1930	36.3 mm (1.4 in)
1931	27.7 mm (1.1 in)
1932	34.8 mm (1.4 in)
1933	30.5 mm (1.2 in)
1934	35.8 mm (1.4 in)
1935	35.8 mm (1.4 in)
1936	33.3 mm (1.3 in)
1937	37.3 mm (1.5 in)
1938	28.2 mm (1.1 in)
1939	34.0 mm (1.3 in)
1940	29.5 mm (1.2 in)
1941	53.1 mm (2.1 in)
1942	31.2 mm (1.2 in)
1943	26.2 mm (1.0 in)
1944	24.1 mm (0.9 in)
1945	39.1 mm (1.5 in)
1946	45.7 mm (1.8 in)
1947	35.6 mm (1.4 in)
1948	30.0 mm (1.2 in)
1949	45.5 mm (1.8 in)
1950	38.1 mm (1.5 in)
1951	29.2 mm (1.1 in)
1952	65.0 mm (2.6 in)
1953	62.2 mm (2.4 in)
1954	40.4 mm (1.6 in)
1955	34.8 mm (1.4 in)
1956	40.4 mm (1.6 in)
1957	64.0 mm (2.5 in)
1958	33.0 mm (1.3 in)
1959	83.6 mm (3.3 in)
1960	64.0 mm (2.5 in)
1961	70.6 mm (2.8 in)
1962	30.2 mm (1.2 in)
1963	45.7 mm (1.8 in)
1964	37.6 mm (1.5 in)
1965	20.3 mm (0.8 in)
1966	33.5 mm (1.3 in)
1967	14.7 mm (0.6 in)
1968	20.3 mm (0.8 in)
1969	42.9 mm (1.7 in)
1970	27.9 mm (1.1 in)
1971	25.7 mm (1.0 in)
1972	66.5 mm (2.6 in)
1973	37.8 mm (1.5 in)
1974	45.2 mm (1.8 in)
1975	24.4 mm (1.0 in)
1976	34.6 mm (1.4 in)
1977	55.8 mm (2.2 in)
1978	48.2 mm (1.9 in)
1979	27.8 mm (1.1 in)
1980	42.4 mm (1.7 in)
1981	27.2 mm (1.1 in)
1982	18.2 mm (0.7 in)
1983	33.6 mm (1.3 in)
1984	23.4 mm (0.9 in)
1985	49.2 mm (1.9 in)
1986	37.0 mm (1.5 in)
1987	37.6 mm (1.5 in)
1988	25.0 mm (1.0 in)
1989	26.2 mm (1.0 in)
1990	36.2 mm (1.4 in)
1991	25.0 mm (1.0 in)
1992	27.4 mm (1.1 in)
1993	42.2 mm (1.7 in)
1994	18.6 mm (0.7 in)
1995	17.0 mm (0.7 in)
1996	16.4 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mortlake, 1879 to 1996. The record is 160.3 mm (6.3 in) in 1910, marked on the chart; the median year is 53.2 mm (2.1 in).

Wettest five days (Rx5day) at Mortlake by year
Year	Wettest five days (Rx5day)
1879	49.9 mm (2.0 in)
1880	48.5 mm (1.9 in)
1881	62.4 mm (2.5 in)
1882	60.7 mm (2.4 in)
1883	50.1 mm (2.0 in)
1884	57.1 mm (2.2 in)
1885	48.6 mm (1.9 in)
1886	61.7 mm (2.4 in)
1887	51.5 mm (2.0 in)
1888	41.7 mm (1.6 in)
1889	73.4 mm (2.9 in)
1890	33.0 mm (1.3 in)
1891	85.8 mm (3.4 in)
1892	45.2 mm (1.8 in)
1893	58.7 mm (2.3 in)
1894	90.5 mm (3.6 in)
1895	72.4 mm (2.9 in)
1896	66.3 mm (2.6 in)
1897	39.6 mm (1.6 in)
1898	31.5 mm (1.2 in)
1899	109.8 mm (4.3 in)
1900	47.5 mm (1.9 in)
1901	53.6 mm (2.1 in)
1902	51.8 mm (2.0 in)
1903	79.0 mm (3.1 in)
1904	39.8 mm (1.6 in)
1905	64.5 mm (2.5 in)
1906	60.2 mm (2.4 in)
1907	66.8 mm (2.6 in)
1908	56.4 mm (2.2 in)
1909	43.2 mm (1.7 in)
1910	160.3 mm (6.3 in)
1911	151.4 mm (6.0 in)
1912	49.7 mm (2.0 in)
1913	76.7 mm (3.0 in)
1914	38.5 mm (1.5 in)
1915	37.8 mm (1.5 in)
1916	80.7 mm (3.2 in)
1917	57.4 mm (2.3 in)
1918	48.5 mm (1.9 in)
1919	63.5 mm (2.5 in)
1920	55.1 mm (2.2 in)
1921	44.2 mm (1.7 in)
1922	44.7 mm (1.8 in)
1923	52.1 mm (2.1 in)
1924	83.3 mm (3.3 in)
1925	59.3 mm (2.3 in)
1926	60.9 mm (2.4 in)
1927	41.4 mm (1.6 in)
1928	72.6 mm (2.9 in)
1929	40.5 mm (1.6 in)
1930	54.6 mm (2.1 in)
1931	53.5 mm (2.1 in)
1932	53.4 mm (2.1 in)
1933	56.9 mm (2.2 in)
1934	57.7 mm (2.3 in)
1935	63.0 mm (2.5 in)
1936	52.8 mm (2.1 in)
1937	72.4 mm (2.9 in)
1938	35.1 mm (1.4 in)
1939	53.3 mm (2.1 in)
1940	52.9 mm (2.1 in)
1941	102.4 mm (4.0 in)
1942	53.1 mm (2.1 in)
1943	45.3 mm (1.8 in)
1944	38.9 mm (1.5 in)
1945	110.0 mm (4.3 in)
1946	80.8 mm (3.2 in)
1947	57.6 mm (2.3 in)
1948	43.7 mm (1.7 in)
1949	52.1 mm (2.1 in)
1950	48.5 mm (1.9 in)
1951	51.9 mm (2.0 in)
1952	69.6 mm (2.7 in)
1953	67.3 mm (2.6 in)
1954	57.7 mm (2.3 in)
1955	60.5 mm (2.4 in)
1956	61.2 mm (2.4 in)
1957	82.0 mm (3.2 in)
1958	59.5 mm (2.3 in)
1959	83.6 mm (3.3 in)
1960	78.5 mm (3.1 in)
1961	75.4 mm (3.0 in)
1962	40.9 mm (1.6 in)
1963	60.0 mm (2.4 in)
1964	56.9 mm (2.2 in)
1965	41.4 mm (1.6 in)
1966	60.2 mm (2.4 in)
1967	24.8 mm (1.0 in)
1968	33.4 mm (1.3 in)
1969	63.8 mm (2.5 in)
1970	38.4 mm (1.5 in)
1971	31.5 mm (1.2 in)
1972	68.3 mm (2.7 in)
1973	44.6 mm (1.8 in)
1974	49.8 mm (2.0 in)
1975	52.4 mm (2.1 in)
1976	49.4 mm (1.9 in)
1977	55.8 mm (2.2 in)
1978	48.6 mm (1.9 in)
1979	30.8 mm (1.2 in)
1980	21.4 mm (0.8 in)
1981	28.0 mm (1.1 in)
1982	25.4 mm (1.0 in)
1983	47.8 mm (1.9 in)
1984	24.4 mm (1.0 in)
1985	61.6 mm (2.4 in)
1986	35.4 mm (1.4 in)
1987	47.6 mm (1.9 in)
1988	55.0 mm (2.2 in)
1989	41.0 mm (1.6 in)
1990	44.0 mm (1.7 in)
1991	25.0 mm (1.0 in)
1992	31.6 mm (1.2 in)
1993	58.9 mm (2.3 in)
1994	25.4 mm (1.0 in)
1995	40.0 mm (1.6 in)
1996	22.6 mm (0.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mortlake, 1879 to 1996. The record is 42 days in 1914, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Mortlake by year
Year	Longest dry spell (CDD)
1879	8 days
1880	17 days
1881	15 days
1882	11 days
1883	17 days
1884	13 days
1885	19 days
1886	16 days
1887	22 days
1888	25 days
1889	18 days
1890	13 days
1891	26 days
1892	18 days
1893	25 days
1894	30 days
1895	38 days
1896	29 days
1897	19 days
1898	22 days
1899	25 days
1900	18 days
1901	34 days
1902	25 days
1903	22 days
1904	33 days
1905	20 days
1906	21 days
1907	24 days
1908	19 days
1909	12 days
1910	26 days
1911	14 days
1912	28 days
1913	25 days
1914	42 days
1915	19 days
1916	24 days
1917	23 days
1918	20 days
1919	27 days
1920	19 days
1921	23 days
1922	21 days
1923	28 days
1924	16 days
1925	30 days
1926	20 days
1927	27 days
1928	24 days
1929	16 days
1930	34 days
1931	27 days
1932	19 days
1933	21 days
1934	18 days
1935	20 days
1936	22 days
1937	22 days
1938	17 days
1939	22 days
1940	18 days
1941	14 days
1942	20 days
1943	27 days
1944	13 days
1945	24 days
1946	13 days
1947	20 days
1948	26 days
1949	11 days
1950	27 days
1951	35 days
1952	22 days
1953	17 days
1954	24 days
1955	27 days
1956	25 days
1957	18 days
1958	21 days
1959	26 days
1960	14 days
1961	29 days
1962	20 days
1963	25 days
1964	21 days
1965	24 days
1966	14 days
1967	32 days
1968	16 days
1969	33 days
1970	33 days
1971	21 days
1972	30 days
1973	15 days
1974	18 days
1975	22 days
1976	15 days
1977	11 days
1978	11 days
1979	11 days
1980	21 days
1981	19 days
1982	18 days
1983	36 days
1984	17 days
1985	18 days
1986	32 days
1987	31 days
1988	22 days
1989	21 days
1990	15 days
1991	34 days
1992	11 days
1993	19 days
1994	15 days
1995	18 days
1996	14 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

89 years, 1880 to 1973

A day with at least 34.5 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 98.2 mm (3.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Mortlake: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	34.5 mm (1.4 in)
5 years	48.0 mm (1.9 in)
10 years	58.1 mm (2.3 in)
25 years	72.7 mm (2.9 in)
50 years	84.8 mm (3.3 in)
100 years	98.2 mm (3.9 in)	Longer than the 89 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, 89 years of values from 1880 to 1973.

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: 89.4 mm (3.5 in) in 1911; 83.6 mm (3.3 in) in 1959; 83.3 mm (3.3 in) in 1910.

Download the Data

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