Portsea Quarantine Station Weather Records (ASN00086097)

Record envelope, standing records and threshold days for Portsea Quarantine Station (ASN00086097), Australia, with 75 years of record.

Key Facts for Portsea Quarantine Station

Portsea Quarantine Station (ASN00086097) is a weather station in Australia at -38.32 latitude and 144.67 longitude, 6 m (20 ft) above sea level.
The station reports from 1904 to 1978, 75 years of record.
1,464 records set at Portsea Quarantine Station still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Portsea Quarantine Station set a daily record precipitation of 27.0 mm (1.1 in) on 1 April 1978.

About the Station

Location: Australia, -38.32 latitude, 144.67 longitude.
Elevation: 6 m (20 ft).
Period of record: 1904 to 1978, 75 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 Portsea Quarantine Station. 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 Portsea Quarantine Station, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.4 C (104.7 F)	7.5 C (45.5 F)	n/a	n/a
Feb	38.6 C (101.5 F)	7.5 C (45.5 F)	n/a	n/a
Mar	35.6 C (96.1 F)	6.0 C (42.8 F)	n/a	n/a
Apr	29.4 C (84.9 F)	5.0 C (41.0 F)	n/a	n/a
May	24.4 C (75.9 F)	3.0 C (37.4 F)	n/a	n/a
Jun	18.3 C (64.9 F)	1.5 C (34.7 F)	n/a	n/a
Jul	20.0 C (68.0 F)	0.5 C (32.9 F)	n/a	n/a
Aug	20.6 C (69.1 F)	0.0 C (32.0 F)	n/a	n/a
Sep	23.6 C (74.5 F)	0.3 C (32.5 F)	n/a	n/a
Oct	32.5 C (90.5 F)	0.8 C (33.4 F)	n/a	n/a
Nov	32.1 C (89.8 F)	3.0 C (37.4 F)	n/a	n/a
Dec	36.0 C (96.8 F)	4.7 C (40.5 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Portsea Quarantine Station still stand. 1975 holds the most, with 151.

Wettest Day of Each Month

Mar: 94.5 mm (3.7 in)

The wettest day on record for each calendar month at Portsea Quarantine Station. The most was 94.5 mm (3.7 in) on 28 March 1924.

Record daily precipitation for each month at Portsea Quarantine Station
Month	Record daily precipitation (mm)	Date
Jan	52.3 mm (2.1 in)	6 January 1907
Feb	79.5 mm (3.1 in)	6 February 1973
Mar	94.5 mm (3.7 in)	28 March 1924
Apr	62.6 mm (2.5 in)	30 April 1974
May	41.1 mm (1.6 in)	14 May 1945
Jun	38.1 mm (1.5 in)	1 June 1939
Jul	35.1 mm (1.4 in)	1 July 1946
Aug	51.6 mm (2.0 in)	26 August 1924
Sep	44.0 mm (1.7 in)	22 September 1976
Oct	40.9 mm (1.6 in)	2 October 1952
Nov	40.6 mm (1.6 in)	14 November 1950
Dec	66.0 mm (2.6 in)	27 December 1907

Period of Record Coverage

1965 to 1978

14 years of record at Portsea Quarantine Station, 1965 to 1978. 6 years have data for under 90 percent of days and are left out of rankings: 1965, 1966, 1967, 1971, 1972, 1978.

Days with data per year at Portsea Quarantine Station
Year	Days with data	Share of year	Complete
1965	244	67%	No
1966	246	67%	No
1967	320	88%	No
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	181	50%	No
1972	260	71%	No
1973	358	98%	Yes
1974	354	97%	Yes
1975	365	100%	Yes
1976	364	99%	Yes
1977	334	92%	Yes
1978	54	15%	No

Latest Records

Latest records at Portsea Quarantine Station
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 April 1978	Portsea Quarantine Station, AU	daily rain	27.0 mm (1.1 in)	15.3 mm (0.6 in)	23 years	35 of 100 (Notable)
30 January 1978	Portsea Quarantine Station, AU	daily rain	20.0 mm (0.8 in)	1.5 mm (0.06 in)	7 years	11 of 100 (Routine)
24 January 1978	Portsea Quarantine Station, AU	daily rain	37.0 mm (1.5 in)	28.9 mm (1.1 in)	31 years	55 of 100 (Notable)
26 July 1977	Portsea Quarantine Station, AU	daily rain	28.0 mm (1.1 in)	12.3 mm (0.5 in)	40 years	46 of 100 (Notable)
30 June 1977	Portsea Quarantine Station, AU	daily rain	13.2 mm (0.5 in)	1.0 mm (0.04 in)	24 years	16 of 100 (Routine)
8 June 1977	Portsea Quarantine Station, AU	daily rain	12.0 mm (0.5 in)	0.3 mm (0.01 in)	6 years	8 of 100 (Routine)
6 May 1977	Portsea Quarantine Station, AU	daily rain	39.8 mm (1.6 in)	28.9 mm (1.1 in)	28 years	55 of 100 (Notable)
24 February 1977	Portsea Quarantine Station, AU	daily rain	25.0 mm (1.0 in)	4.7 mm (0.19 in)	8 years	13 of 100 (Routine)
16 January 1977	Portsea Quarantine Station, AU	daily rain	20.6 mm (0.8 in)	13.0 mm (0.5 in)	36 years	20 of 100 (Routine)
15 January 1977	Portsea Quarantine Station, AU	daily rain	26.0 mm (1.0 in)	11.5 mm (0.5 in)	39 years	34 of 100 (Routine)
4 October 1976	Portsea Quarantine Station, AU	daily rain	17.0 mm (0.7 in)	8.6 mm (0.34 in)	8 years	20 of 100 (Routine)
22 September 1976	Portsea Quarantine Station, AU	monthly rain	44.0 mm (1.7 in)	2.9 mm (0.11 in)	70 years	44 of 100 (Notable)
12 September 1976	Portsea Quarantine Station, AU	daily rain	11.0 mm (0.4 in)	0.1 mm (0.00 in)	7 years	9 of 100 (Routine)
29 February 1976	Portsea Quarantine Station, AU	daily rain	7.0 mm (0.28 in)	7.0 mm (0.28 in)	64 years	20 of 100 (Routine)
23 November 1975	Portsea Quarantine Station, AU	daily rain	23.6 mm (0.9 in)	12.7 mm (0.5 in)	68 years	20 of 100 (Routine)
31 October 1975	Portsea Quarantine Station, AU	daily rain	22.0 mm (0.9 in)	7.3 mm (0.29 in)	38 years	20 of 100 (Routine)
8 October 1975	Portsea Quarantine Station, AU	daily rain	22.0 mm (0.9 in)	4.2 mm (0.17 in)	9 years	16 of 100 (Routine)
28 September 1975	Portsea Quarantine Station, AU	daily rain	12.0 mm (0.5 in)	3.9 mm (0.15 in)	32 years	20 of 100 (Routine)
13 September 1975	Portsea Quarantine Station, AU	daily rain	26.0 mm (1.0 in)	15.8 mm (0.6 in)	62 years	58 of 100 (Notable)
19 March 1975	Portsea Quarantine Station, AU	daily rain	34.0 mm (1.3 in)	26.6 mm (1.0 in)	1 year	38 of 100 (Notable)

Extremes by Year

1904 to 1978

Yearly extremes at Portsea Quarantine Station: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.4 C (104.7 F)	1968	35.3 C (95.5 F)	14
Coldest night (TNn)	0.0 C (32.0 F)	1976	1.5 C (34.7 F)	14
Wettest day (Rx1day)	94.5 mm (3.7 in)	1924	33.8 mm (1.3 in)	64
Wettest five days (Rx5day)	155.7 mm (6.1 in)	1973	59.6 mm (2.3 in)	64
Longest dry spell (CDD)	35 days	1906	20 days	64

Hottest day (TXx)

The hottest day of the year at Portsea Quarantine Station, 1904 to 1978. The record is 40.4 C (104.7 F) in 1968, marked on the chart; the median year is 35.3 C (95.5 F).

Hottest day (TXx) at Portsea Quarantine Station by year
Year	Hottest day (TXx)
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1911	n/a
1912	n/a
1913	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
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	35.0 C (95.0 F)
1966	35.6 C (96.1 F)
1967	38.6 C (101.5 F)
1968	40.4 C (104.7 F)
1969	36.2 C (97.2 F)
1970	32.2 C (90.0 F)
1971	33.3 C (91.9 F)
1972	36.0 C (96.8 F)
1973	34.5 C (94.1 F)
1974	33.5 C (92.3 F)
1975	36.5 C (97.7 F)
1976	39.0 C (102.2 F)
1977	34.0 C (93.2 F)
1978	30.0 C (86.0 F)

Coldest night (TNn)

The coldest night of the year at Portsea Quarantine Station, 1904 to 1978. The record is 0.0 C (32.0 F) in 1976, marked on the chart; the median year is 1.5 C (34.7 F).

Coldest night (TNn) at Portsea Quarantine Station by year
Year	Coldest night (TNn)
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1911	n/a
1912	n/a
1913	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
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	3.3 C (37.9 F)
1966	3.9 C (39.0 F)
1967	0.3 C (32.5 F)
1968	1.0 C (33.8 F)
1969	1.9 C (35.4 F)
1970	0.3 C (32.5 F)
1971	5.6 C (42.1 F)
1972	1.9 C (35.4 F)
1973	1.5 C (34.7 F)
1974	1.0 C (33.8 F)
1975	1.5 C (34.7 F)
1976	0.0 C (32.0 F)
1977	1.0 C (33.8 F)
1978	5.0 C (41.0 F)

Wettest day (Rx1day)

The wettest day of the year at Portsea Quarantine Station, 1904 to 1978. The record is 94.5 mm (3.7 in) in 1924, marked on the chart; the median year is 33.8 mm (1.3 in).

Wettest day (Rx1day) at Portsea Quarantine Station by year
Year	Wettest day (Rx1day)
1904	29.2 mm (1.1 in)
1905	32.5 mm (1.3 in)
1906	41.1 mm (1.6 in)
1907	66.0 mm (2.6 in)
1908	12.2 mm (0.5 in)
1911	31.8 mm (1.3 in)
1912	27.9 mm (1.1 in)
1913	25.4 mm (1.0 in)
1923	24.6 mm (1.0 in)
1924	94.5 mm (3.7 in)
1925	29.2 mm (1.1 in)
1926	26.7 mm (1.1 in)
1927	17.8 mm (0.7 in)
1928	43.7 mm (1.7 in)
1929	30.2 mm (1.2 in)
1930	24.1 mm (0.9 in)
1931	28.4 mm (1.1 in)
1932	35.8 mm (1.4 in)
1933	59.7 mm (2.4 in)
1934	39.4 mm (1.6 in)
1935	32.3 mm (1.3 in)
1936	31.8 mm (1.3 in)
1937	33.3 mm (1.3 in)
1938	39.4 mm (1.6 in)
1939	50.3 mm (2.0 in)
1940	21.8 mm (0.9 in)
1941	33.5 mm (1.3 in)
1942	30.7 mm (1.2 in)
1943	27.9 mm (1.1 in)
1944	47.0 mm (1.9 in)
1945	41.1 mm (1.6 in)
1946	44.5 mm (1.8 in)
1947	39.6 mm (1.6 in)
1948	31.8 mm (1.3 in)
1949	66.5 mm (2.6 in)
1950	48.3 mm (1.9 in)
1951	66.3 mm (2.6 in)
1952	51.6 mm (2.0 in)
1953	35.6 mm (1.4 in)
1954	30.0 mm (1.2 in)
1955	54.9 mm (2.2 in)
1956	26.4 mm (1.0 in)
1957	22.4 mm (0.9 in)
1958	24.4 mm (1.0 in)
1959	30.5 mm (1.2 in)
1960	57.2 mm (2.3 in)
1961	46.0 mm (1.8 in)
1962	39.9 mm (1.6 in)
1963	26.9 mm (1.1 in)
1964	34.3 mm (1.4 in)
1965	24.9 mm (1.0 in)
1966	41.1 mm (1.6 in)
1967	17.3 mm (0.7 in)
1968	25.9 mm (1.0 in)
1969	36.1 mm (1.4 in)
1970	43.9 mm (1.7 in)
1971	31.8 mm (1.3 in)
1972	24.9 mm (1.0 in)
1973	79.5 mm (3.1 in)
1974	62.6 mm (2.5 in)
1975	34.0 mm (1.3 in)
1976	44.0 mm (1.7 in)
1977	39.8 mm (1.6 in)
1978	37.0 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Portsea Quarantine Station, 1904 to 1978. The record is 155.7 mm (6.1 in) in 1973, marked on the chart; the median year is 59.6 mm (2.3 in).

Wettest five days (Rx5day) at Portsea Quarantine Station by year
Year	Wettest five days (Rx5day)
1904	49.5 mm (1.9 in)
1905	62.8 mm (2.5 in)
1906	71.6 mm (2.8 in)
1907	120.4 mm (4.7 in)
1908	54.4 mm (2.1 in)
1911	63.3 mm (2.5 in)
1912	43.4 mm (1.7 in)
1913	47.0 mm (1.9 in)
1923	63.1 mm (2.5 in)
1924	154.5 mm (6.1 in)
1925	66.6 mm (2.6 in)
1926	41.7 mm (1.6 in)
1927	32.0 mm (1.3 in)
1928	64.8 mm (2.6 in)
1929	42.4 mm (1.7 in)
1930	55.6 mm (2.2 in)
1931	60.5 mm (2.4 in)
1932	41.3 mm (1.6 in)
1933	79.3 mm (3.1 in)
1934	81.0 mm (3.2 in)
1935	77.4 mm (3.0 in)
1936	69.1 mm (2.7 in)
1937	81.0 mm (3.2 in)
1938	45.2 mm (1.8 in)
1939	117.4 mm (4.6 in)
1940	34.8 mm (1.4 in)
1941	67.3 mm (2.6 in)
1942	42.0 mm (1.7 in)
1943	37.6 mm (1.5 in)
1944	47.0 mm (1.9 in)
1945	60.1 mm (2.4 in)
1946	75.7 mm (3.0 in)
1947	64.8 mm (2.6 in)
1948	51.3 mm (2.0 in)
1949	78.6 mm (3.1 in)
1950	86.9 mm (3.4 in)
1951	122.2 mm (4.8 in)
1952	64.6 mm (2.5 in)
1953	38.4 mm (1.5 in)
1954	54.2 mm (2.1 in)
1955	55.4 mm (2.2 in)
1956	35.8 mm (1.4 in)
1957	36.3 mm (1.4 in)
1958	44.0 mm (1.7 in)
1959	47.5 mm (1.9 in)
1960	88.6 mm (3.5 in)
1961	51.6 mm (2.0 in)
1962	65.8 mm (2.6 in)
1963	68.0 mm (2.7 in)
1964	52.9 mm (2.1 in)
1965	38.0 mm (1.5 in)
1966	55.1 mm (2.2 in)
1967	30.2 mm (1.2 in)
1968	59.0 mm (2.3 in)
1969	51.3 mm (2.0 in)
1970	82.1 mm (3.2 in)
1971	61.1 mm (2.4 in)
1972	34.3 mm (1.4 in)
1973	155.7 mm (6.1 in)
1974	87.9 mm (3.5 in)
1975	48.0 mm (1.9 in)
1976	72.8 mm (2.9 in)
1977	63.2 mm (2.5 in)
1978	42.6 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Portsea Quarantine Station, 1904 to 1978. The record is 35 days in 1906, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Portsea Quarantine Station by year
Year	Longest dry spell (CDD)
1904	15 days
1905	20 days
1906	35 days
1907	23 days
1908	18 days
1911	20 days
1912	26 days
1913	31 days
1923	12 days
1924	11 days
1925	24 days
1926	24 days
1927	21 days
1928	17 days
1929	10 days
1930	28 days
1931	21 days
1932	23 days
1933	20 days
1934	28 days
1935	19 days
1936	21 days
1937	17 days
1938	18 days
1939	29 days
1940	16 days
1941	15 days
1942	19 days
1943	17 days
1944	22 days
1945	24 days
1946	18 days
1947	15 days
1948	20 days
1949	20 days
1950	26 days
1951	27 days
1952	22 days
1953	18 days
1954	17 days
1955	18 days
1956	24 days
1957	18 days
1958	15 days
1959	17 days
1960	19 days
1961	35 days
1962	21 days
1963	16 days
1964	22 days
1965	20 days
1966	12 days
1967	30 days
1968	25 days
1969	12 days
1970	28 days
1971	22 days
1972	21 days
1973	15 days
1974	27 days
1975	24 days
1976	15 days
1977	21 days
1978	8 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

36 years, 1905 to 1977

A day with at least 39.5 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 101.2 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Portsea Quarantine Station: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	39.5 mm (1.6 in)
5 years	54.0 mm (2.1 in)
10 years	64.4 mm (2.5 in)
25 years	78.4 mm (3.1 in)
50 years	89.6 mm (3.5 in)	Longer than the 36 years of record
100 years	101.2 mm (4.0 in)	Longer than the 36 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, 36 years of values from 1905 to 1977.

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: 94.5 mm (3.7 in) in 1924; 79.5 mm (3.1 in) in 1973; 66.5 mm (2.6 in) in 1949.

Download the Data

Data for Portsea Quarantine Station standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Portsea Quarantine Station 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 2026-10-13. Last revised 13 October 2026 (2026-10-13).