Port Arthur Weather Records (ASN00094052)

Record envelope, standing records and threshold days for Port Arthur (ASN00094052), Australia, with 144 years of record.

Key Facts for Port Arthur

Port Arthur (ASN00094052) is a weather station in Australia at -43.15 latitude and 147.85 longitude, 20 m (66 ft) above sea level.
The station reports from 1837 to 1980, 144 years of record.
0 records set at Port Arthur still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Port Arthur set a daily record precipitation of 13.2 mm (0.5 in) on 15 October 1980.

About the Station

Location: Australia, -43.15 latitude, 147.85 longitude.
Elevation: 20 m (66 ft).
Period of record: 1837 to 1980, 144 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 Port Arthur. 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 Port Arthur, 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 Port Arthur still stand.

Wettest Day of Each Month

Apr: 161.0 mm (6.3 in)

The wettest day on record for each calendar month at Port Arthur. The most was 161.0 mm (6.3 in) on 20 April 1909.

Record daily precipitation for each month at Port Arthur
Month	Record daily precipitation (mm)	Date
Jan	76.5 mm (3.0 in)	30 January 1916
Feb	99.1 mm (3.9 in)	17 February 1924
Mar	116.8 mm (4.6 in)	26 March 1946
Apr	161.0 mm (6.3 in)	20 April 1909
May	118.1 mm (4.6 in)	17 May 1969
Jun	135.6 mm (5.3 in)	18 June 1893
Jul	79.2 mm (3.1 in)	12 July 1967
Aug	109.0 mm (4.3 in)	17 August 1958
Sep	80.0 mm (3.1 in)	15 September 1957
Oct	80.0 mm (3.1 in)	31 October 1947
Nov	138.4 mm (5.4 in)	18 November 1899
Dec	114.3 mm (4.5 in)	6 December 1891

Latest Records

Latest records at Port Arthur
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 October 1980	Port Arthur, AU	daily rain	13.2 mm (0.5 in)	0.5 mm (0.02 in)	137 years	20 of 100 (Routine)
22 September 1980	Port Arthur, AU	daily rain	27.6 mm (1.1 in)	6.5 mm (0.26 in)	59 years	36 of 100 (Notable)
2 September 1980	Port Arthur, AU	daily rain	22.0 mm (0.9 in)	6.0 mm (0.24 in)	114 years	20 of 100 (Routine)
2 June 1980	Port Arthur, AU	daily rain	30.2 mm (1.2 in)	1.2 mm (0.05 in)	90 years	38 of 100 (Notable)
31 March 1980	Port Arthur, AU	daily rain	21.0 mm (0.8 in)	0.4 mm (0.02 in)	88 years	20 of 100 (Routine)
30 September 1979	Port Arthur, AU	daily rain	14.4 mm (0.6 in)	5.0 mm (0.20 in)	140 years	20 of 100 (Routine)
12 September 1979	Port Arthur, AU	daily rain	30.0 mm (1.2 in)	10.6 mm (0.4 in)	2 years	25 of 100 (Routine)
5 September 1979	Port Arthur, AU	daily rain	23.0 mm (0.9 in)	4.2 mm (0.17 in)	64 years	20 of 100 (Routine)
12 April 1979	Port Arthur, AU	daily rain	43.4 mm (1.7 in)	8.9 mm (0.35 in)	32 years	27 of 100 (Routine)
20 November 1978	Port Arthur, AU	daily rain	34.2 mm (1.3 in)	13.9 mm (0.5 in)	8 years	27 of 100 (Routine)
9 August 1978	Port Arthur, AU	daily rain	56.8 mm (2.2 in)	4.0 mm (0.16 in)	12 years	17 of 100 (Routine)
8 August 1978	Port Arthur, AU	daily rain	52.4 mm (2.1 in)	33.9 mm (1.3 in)	36 years	61 of 100 (Major)
10 April 1978	Port Arthur, AU	daily rain	47.6 mm (1.9 in)	10.0 mm (0.4 in)	5 years	20 of 100 (Routine)
8 February 1978	Port Arthur, AU	daily rain	34.2 mm (1.3 in)	17.2 mm (0.7 in)	43 years	39 of 100 (Notable)
29 January 1978	Port Arthur, AU	daily rain	12.8 mm (0.5 in)	0.1 mm (0.00 in)	52 years	20 of 100 (Routine)
28 July 1977	Port Arthur, AU	daily rain	40.2 mm (1.6 in)	2.1 mm (0.08 in)	78 years	35 of 100 (Notable)
14 July 1977	Port Arthur, AU	daily rain	27.2 mm (1.1 in)	1.8 mm (0.07 in)	76 years	35 of 100 (Notable)
17 November 1976	Port Arthur, AU	daily rain	47.2 mm (1.9 in)	17.5 mm (0.7 in)	45 years	43 of 100 (Notable)
12 September 1976	Port Arthur, AU	daily rain	19.4 mm (0.8 in)	1.1 mm (0.04 in)	56 years	20 of 100 (Routine)
10 September 1976	Port Arthur, AU	daily rain	29.1 mm (1.1 in)	12.3 mm (0.5 in)	61 years	46 of 100 (Notable)

Extremes by Year

1837 to 1980

Yearly extremes at Port Arthur: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	161.0 mm (6.3 in)	1909	49.3 mm (1.9 in)	91
Wettest five days (Rx5day)	277.1 mm (10.9 in)	1923	94.2 mm (3.7 in)	91
Longest dry spell (CDD)	50 days	1842	15 days	91

Wettest day (Rx1day)

The wettest day of the year at Port Arthur, 1837 to 1980. The record is 161.0 mm (6.3 in) in 1909, marked on the chart; the median year is 49.3 mm (1.9 in).

Wettest day (Rx1day) at Port Arthur by year
Year	Wettest day (Rx1day)
1837	40.6 mm (1.6 in)
1838	66.0 mm (2.6 in)
1842	34.8 mm (1.4 in)
1858	61.0 mm (2.4 in)
1863	71.1 mm (2.8 in)
1865	39.6 mm (1.6 in)
1877	27.9 mm (1.1 in)
1885	16.0 mm (0.6 in)
1888	32.0 mm (1.3 in)
1889	115.8 mm (4.6 in)
1890	41.1 mm (1.6 in)
1891	114.3 mm (4.5 in)
1893	135.6 mm (5.3 in)
1896	36.1 mm (1.4 in)
1897	40.1 mm (1.6 in)
1898	45.7 mm (1.8 in)
1899	138.4 mm (5.4 in)
1900	61.5 mm (2.4 in)
1904	45.7 mm (1.8 in)
1909	161.0 mm (6.3 in)
1910	44.5 mm (1.8 in)
1911	37.1 mm (1.5 in)
1912	33.0 mm (1.3 in)
1913	70.9 mm (2.8 in)
1914	35.6 mm (1.4 in)
1915	30.2 mm (1.2 in)
1916	76.5 mm (3.0 in)
1917	45.5 mm (1.8 in)
1918	53.3 mm (2.1 in)
1919	54.1 mm (2.1 in)
1920	34.3 mm (1.4 in)
1921	31.2 mm (1.2 in)
1922	59.4 mm (2.3 in)
1923	124.5 mm (4.9 in)
1924	99.1 mm (3.9 in)
1925	28.2 mm (1.1 in)
1926	38.9 mm (1.5 in)
1927	46.7 mm (1.8 in)
1928	79.2 mm (3.1 in)
1929	102.9 mm (4.1 in)
1930	38.1 mm (1.5 in)
1931	72.6 mm (2.9 in)
1932	85.6 mm (3.4 in)
1933	51.3 mm (2.0 in)
1934	112.3 mm (4.4 in)
1935	74.2 mm (2.9 in)
1936	36.3 mm (1.4 in)
1937	28.2 mm (1.1 in)
1938	63.0 mm (2.5 in)
1939	54.1 mm (2.1 in)
1940	40.6 mm (1.6 in)
1941	58.4 mm (2.3 in)
1942	46.5 mm (1.8 in)
1943	27.2 mm (1.1 in)
1944	19.1 mm (0.8 in)
1945	33.8 mm (1.3 in)
1946	116.8 mm (4.6 in)
1947	80.0 mm (3.1 in)
1948	47.2 mm (1.9 in)
1949	43.2 mm (1.7 in)
1950	49.3 mm (1.9 in)
1951	64.8 mm (2.6 in)
1952	57.2 mm (2.3 in)
1953	48.5 mm (1.9 in)
1954	96.5 mm (3.8 in)
1955	37.6 mm (1.5 in)
1956	64.3 mm (2.5 in)
1957	80.0 mm (3.1 in)
1958	109.0 mm (4.3 in)
1959	41.1 mm (1.6 in)
1960	104.1 mm (4.1 in)
1961	45.2 mm (1.8 in)
1962	56.6 mm (2.2 in)
1963	49.5 mm (1.9 in)
1964	81.0 mm (3.2 in)
1965	52.8 mm (2.1 in)
1966	47.8 mm (1.9 in)
1967	79.2 mm (3.1 in)
1968	29.7 mm (1.2 in)
1969	118.1 mm (4.6 in)
1970	47.2 mm (1.9 in)
1971	67.3 mm (2.6 in)
1972	37.6 mm (1.5 in)
1973	33.0 mm (1.3 in)
1974	65.0 mm (2.6 in)
1975	63.0 mm (2.5 in)
1976	47.2 mm (1.9 in)
1977	40.2 mm (1.6 in)
1978	56.8 mm (2.2 in)
1979	43.4 mm (1.7 in)
1980	30.2 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Port Arthur, 1837 to 1980. The record is 277.1 mm (10.9 in) in 1923, marked on the chart; the median year is 94.2 mm (3.7 in).

Wettest five days (Rx5day) at Port Arthur by year
Year	Wettest five days (Rx5day)
1837	78.7 mm (3.1 in)
1838	125.7 mm (4.9 in)
1842	65.1 mm (2.6 in)
1858	151.1 mm (5.9 in)
1863	155.8 mm (6.1 in)
1865	108.1 mm (4.3 in)
1877	70.0 mm (2.8 in)
1885	33.0 mm (1.3 in)
1888	56.9 mm (2.2 in)
1889	188.4 mm (7.4 in)
1890	87.7 mm (3.5 in)
1891	149.3 mm (5.9 in)
1893	210.7 mm (8.3 in)
1896	113.8 mm (4.5 in)
1897	55.1 mm (2.2 in)
1898	89.9 mm (3.5 in)
1899	214.9 mm (8.5 in)
1900	83.3 mm (3.3 in)
1904	67.6 mm (2.7 in)
1909	219.0 mm (8.6 in)
1910	67.0 mm (2.6 in)
1911	83.3 mm (3.3 in)
1912	71.0 mm (2.8 in)
1913	126.0 mm (5.0 in)
1914	73.5 mm (2.9 in)
1915	48.7 mm (1.9 in)
1916	108.8 mm (4.3 in)
1917	82.8 mm (3.3 in)
1918	110.5 mm (4.4 in)
1919	108.0 mm (4.3 in)
1920	56.6 mm (2.2 in)
1921	95.0 mm (3.7 in)
1922	81.8 mm (3.2 in)
1923	277.1 mm (10.9 in)
1924	152.7 mm (6.0 in)
1925	57.9 mm (2.3 in)
1926	86.1 mm (3.4 in)
1927	92.5 mm (3.6 in)
1928	157.4 mm (6.2 in)
1929	151.6 mm (6.0 in)
1930	54.4 mm (2.1 in)
1931	131.3 mm (5.2 in)
1932	111.1 mm (4.4 in)
1933	74.9 mm (2.9 in)
1934	183.9 mm (7.2 in)
1935	141.0 mm (5.6 in)
1936	64.6 mm (2.5 in)
1937	64.0 mm (2.5 in)
1938	95.8 mm (3.8 in)
1939	67.0 mm (2.6 in)
1940	64.8 mm (2.6 in)
1941	144.8 mm (5.7 in)
1942	70.4 mm (2.8 in)
1943	66.4 mm (2.6 in)
1944	39.3 mm (1.5 in)
1945	66.4 mm (2.6 in)
1946	147.8 mm (5.8 in)
1947	147.8 mm (5.8 in)
1948	84.5 mm (3.3 in)
1949	71.6 mm (2.8 in)
1950	94.2 mm (3.7 in)
1951	99.0 mm (3.9 in)
1952	83.8 mm (3.3 in)
1953	90.7 mm (3.6 in)
1954	166.6 mm (6.6 in)
1955	106.2 mm (4.2 in)
1956	94.0 mm (3.7 in)
1957	100.1 mm (3.9 in)
1958	217.5 mm (8.6 in)
1959	92.1 mm (3.6 in)
1960	191.8 mm (7.6 in)
1961	101.2 mm (4.0 in)
1962	101.1 mm (4.0 in)
1963	77.0 mm (3.0 in)
1964	132.2 mm (5.2 in)
1965	67.0 mm (2.6 in)
1966	102.1 mm (4.0 in)
1967	137.3 mm (5.4 in)
1968	89.5 mm (3.5 in)
1969	148.9 mm (5.9 in)
1970	106.7 mm (4.2 in)
1971	116.9 mm (4.6 in)
1972	65.2 mm (2.6 in)
1973	83.2 mm (3.3 in)
1974	112.0 mm (4.4 in)
1975	116.4 mm (4.6 in)
1976	113.6 mm (4.5 in)
1977	83.0 mm (3.3 in)
1978	136.1 mm (5.4 in)
1979	77.8 mm (3.1 in)
1980	47.8 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Port Arthur, 1837 to 1980. The record is 50 days in 1842, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Port Arthur by year
Year	Longest dry spell (CDD)
1837	17 days
1838	24 days
1842	50 days
1858	14 days
1863	13 days
1865	16 days
1877	14 days
1885	10 days
1888	10 days
1889	9 days
1890	11 days
1891	12 days
1893	20 days
1896	12 days
1897	22 days
1898	16 days
1899	17 days
1900	13 days
1904	25 days
1909	19 days
1910	18 days
1911	18 days
1912	15 days
1913	19 days
1914	17 days
1915	17 days
1916	17 days
1917	15 days
1918	16 days
1919	13 days
1920	14 days
1921	24 days
1922	14 days
1923	14 days
1924	10 days
1925	10 days
1926	18 days
1927	12 days
1928	14 days
1929	13 days
1930	17 days
1931	13 days
1932	13 days
1933	14 days
1934	27 days
1935	21 days
1936	15 days
1937	18 days
1938	10 days
1939	16 days
1940	16 days
1941	20 days
1942	10 days
1943	5 days
1944	8 days
1945	13 days
1946	12 days
1947	12 days
1948	19 days
1949	10 days
1950	13 days
1951	15 days
1952	15 days
1953	16 days
1954	18 days
1955	19 days
1956	15 days
1957	11 days
1958	15 days
1959	20 days
1960	30 days
1961	28 days
1962	12 days
1963	19 days
1964	12 days
1965	14 days
1966	12 days
1967	15 days
1968	14 days
1969	10 days
1970	32 days
1971	12 days
1972	26 days
1973	14 days
1974	20 days
1975	23 days
1976	13 days
1977	13 days
1978	25 days
1979	23 days
1980	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

77 years, 1838 to 1979

A day with at least 54.2 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 179.9 mm (7.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Port Arthur: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	54.2 mm (2.1 in)
5 years	78.6 mm (3.1 in)
10 years	97.9 mm (3.9 in)
25 years	126.6 mm (5.0 in)
50 years	151.6 mm (6.0 in)
100 years	179.9 mm (7.1 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 1838 to 1979.

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: 161.0 mm (6.3 in) in 1909; 138.4 mm (5.4 in) in 1899; 135.6 mm (5.3 in) in 1893.

Download the Data

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