Bunbury Post Office Weather Records (ASN00009514)

Record envelope, standing records and threshold days for Bunbury Post Office (ASN00009514), Australia, with 109 years of record.

Key Facts for Bunbury Post Office

Bunbury Post Office (ASN00009514) is a weather station in Australia at -33.33 latitude and 115.63 longitude, 4 m (13 ft) above sea level.
The station reports from 1877 to 1985, 109 years of record.
1,464 records set at Bunbury Post Office still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Bunbury Post Office set a daily record precipitation of 55.2 mm (2.2 in) on 26 May 1985.

About the Station

Location: Australia, -33.33 latitude, 115.63 longitude.
Elevation: 4 m (13 ft).
Period of record: 1877 to 1985, 109 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 Bunbury Post Office. 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 Bunbury Post Office, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.9 C (105.6 F)	9.3 C (48.7 F)	n/a	n/a
Feb	38.9 C (102.0 F)	7.5 C (45.5 F)	n/a	n/a
Mar	36.0 C (96.8 F)	5.9 C (42.6 F)	n/a	n/a
Apr	33.8 C (92.8 F)	4.6 C (40.3 F)	n/a	n/a
May	26.7 C (80.1 F)	3.2 C (37.8 F)	n/a	n/a
Jun	23.6 C (74.5 F)	0.3 C (32.5 F)	n/a	n/a
Jul	23.2 C (73.8 F)	1.2 C (34.2 F)	n/a	n/a
Aug	24.2 C (75.6 F)	1.2 C (34.2 F)	n/a	n/a
Sep	25.7 C (78.3 F)	2.1 C (35.8 F)	n/a	n/a
Oct	31.7 C (89.1 F)	2.8 C (37.0 F)	n/a	n/a
Nov	36.1 C (97.0 F)	4.1 C (39.4 F)	n/a	n/a
Dec	38.1 C (100.6 F)	6.9 C (44.4 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Bunbury Post Office still stand. 1968 holds the most, with 118.

Standing records at Bunbury Post Office by the year they were set
Year set	Standing records
1965	64
1966	69
1967	59
1968	118
1969	70
1970	59
1971	72
1972	88
1973	74
1974	56
1975	57
1976	70
1977	65
1978	66
1979	64
1980	74
1981	83
1982	87
1983	62
1984	67
1985	40

All-Time Record Progression

2 new records

2 all-time records were set at Bunbury Post Office between 1 July 1944 and 22 January 1982. Each dot is a new record.

When Bunbury Post Office set new all-time records
Date	Kind	Detail
1944-07-01	Record daily precipitation	Record daily precipitation 94.5 mm (3.7 in)
1982-01-22	Record daily precipitation	Record daily precipitation 115.4 mm (4.5 in)

Wettest Day of Each Month

Jan: 115.4 mm (4.5 in)

The wettest day on record for each calendar month at Bunbury Post Office. The most was 115.4 mm (4.5 in) on 22 January 1982.

Record daily precipitation for each month at Bunbury Post Office
Month	Record daily precipitation (mm)	Date
Jan	115.4 mm (4.5 in)	22 January 1982
Feb	85.9 mm (3.4 in)	26 February 1915
Mar	65.5 mm (2.6 in)	22 March 1921
Apr	98.0 mm (3.9 in)	9 April 1985
May	78.7 mm (3.1 in)	3 May 1947
Jun	82.0 mm (3.2 in)	15 June 1947
Jul	94.5 mm (3.7 in)	1 July 1944
Aug	61.5 mm (2.4 in)	6 August 1934
Sep	57.7 mm (2.3 in)	16 September 1918
Oct	39.1 mm (1.5 in)	24 October 1907
Nov	37.8 mm (1.5 in)	4 November 1965
Dec	26.7 mm (1.1 in)	31 December 1959

Period of Record Coverage

1965 to 1985

21 years of record at Bunbury Post Office, 1965 to 1985. 6 years have data for under 90 percent of days and are left out of rankings: 1975, 1976, 1977, 1978, 1979, 1985.

Days with data per year at Bunbury Post Office
Year	Days with data	Share of year	Complete
1965	365	100%	Yes
1966	364	100%	Yes
1967	359	98%	Yes
1968	366	100%	Yes
1969	363	99%	Yes
1970	360	99%	Yes
1971	365	100%	Yes
1972	362	99%	Yes
1973	364	100%	Yes
1974	360	99%	Yes
1975	320	88%	No
1976	321	88%	No
1977	308	84%	No
1978	318	87%	No
1979	293	80%	No
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	366	100%	Yes
1985	157	43%	No

Latest Records

Latest records at Bunbury Post Office
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 May 1985	Bunbury Post Office, AU	daily rain	55.2 mm (2.2 in)	17.6 mm (0.7 in)	67 years	46 of 100 (Notable)
10 April 1985	Bunbury Post Office, AU	daily rain	16.8 mm (0.7 in)	3.6 mm (0.14 in)	76 years	20 of 100 (Routine)
9 April 1985	Bunbury Post Office, AU	monthly rain	98.0 mm (3.9 in)	37.0 mm (1.5 in)	27 years	68 of 100 (Major)
8 March 1985	Bunbury Post Office, AU	daily rain	14.4 mm (0.6 in)	9.8 mm (0.39 in)	39 years	20 of 100 (Routine)
28 December 1984	Bunbury Post Office, AU	daily rain	17.4 mm (0.7 in)	9.8 mm (0.39 in)	72 years	20 of 100 (Routine)
8 November 1984	Bunbury Post Office, AU	daily rain	33.0 mm (1.3 in)	18.8 mm (0.7 in)	34 years	58 of 100 (Notable)
6 November 1984	Bunbury Post Office, AU	daily rain	15.8 mm (0.6 in)	3.9 mm (0.15 in)	46 years	20 of 100 (Routine)
14 September 1984	Bunbury Post Office, AU	daily rain	34.0 mm (1.3 in)	2.2 mm (0.09 in)	37 years	24 of 100 (Routine)
5 September 1984	Bunbury Post Office, AU	daily rain	22.2 mm (0.9 in)	5.2 mm (0.20 in)	51 years	20 of 100 (Routine)
21 June 1984	Bunbury Post Office, AU	daily rain	49.2 mm (1.9 in)	15.9 mm (0.6 in)	39 years	34 of 100 (Routine)
30 April 1984	Bunbury Post Office, AU	daily rain	16.2 mm (0.6 in)	3.0 mm (0.12 in)	35 years	20 of 100 (Routine)
7 November 1983	Bunbury Post Office, AU	daily rain	10.2 mm (0.4 in)	0.5 mm (0.02 in)	33 years	20 of 100 (Routine)
18 June 1983	Bunbury Post Office, AU	daily rain	56.6 mm (2.2 in)	11.6 mm (0.5 in)	37 years	31 of 100 (Routine)
1 June 1983	Bunbury Post Office, AU	daily rain	50.2 mm (2.0 in)	26.3 mm (1.0 in)	56 years	48 of 100 (Notable)
30 March 1983	Bunbury Post Office, AU	daily rain	6.2 mm (0.24 in)	1.9 mm (0.07 in)	57 years	20 of 100 (Routine)
11 December 1982	Bunbury Post Office, AU	daily rain	6.4 mm (0.25 in)	3.9 mm (0.15 in)	71 years	20 of 100 (Routine)
15 September 1982	Bunbury Post Office, AU	daily rain	33.8 mm (1.3 in)	4.8 mm (0.19 in)	4 years	18 of 100 (Routine)
23 August 1982	Bunbury Post Office, AU	daily rain	36.2 mm (1.4 in)	9.0 mm (0.35 in)	39 years	32 of 100 (Routine)
15 July 1982	Bunbury Post Office, AU	daily rain	53.8 mm (2.1 in)	27.4 mm (1.1 in)	36 years	46 of 100 (Notable)
3 June 1982	Bunbury Post Office, AU	daily rain	38.0 mm (1.5 in)	5.5 mm (0.22 in)	40 years	26 of 100 (Routine)

Climate Trend

16 complete years, 1965 to 1984

One stripe for each of 16 complete years at Bunbury Post Office, 1965 to 1984. Blue stripes are years cooler than the station's own mean of 17.1 C (62.8 F); red stripes are warmer. The coolest year was 1968, at 16.0 C (60.8 F), and the warmest was 1983, at 17.9 C (64.1 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Bunbury Post Office as warming stripes, 1965 to 1984
Year	Annual mean temperature	Difference from the station mean
1965	17.2 C	+0.07 C
1966	16.7 C	-0.48 C
1967	17.3 C	+0.16 C
1968	16.0 C	-1.16 C
1969	16.9 C	-0.28 C
1970	17.1 C	-0.07 C
1971	16.4 C	-0.70 C
1972	17.8 C	+0.66 C
1974	17.3 C	+0.13 C
1976	17.7 C	+0.51 C
1978	17.8 C	+0.69 C
1980	17.1 C	-0.07 C
1981	16.8 C	-0.34 C
1982	17.2 C	+0.10 C
1983	17.9 C	+0.72 C
1984	17.1 C	+0.00 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1877 to 1985

Yearly extremes at Bunbury Post Office: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.9 C (105.6 F)	1980	36.6 C (97.9 F)	21
Coldest night (TNn)	0.3 C (32.5 F)	1981	2.7 C (36.9 F)	21
Wettest day (Rx1day)	115.4 mm (4.5 in)	1982	50.0 mm (2.0 in)	85
Wettest five days (Rx5day)	188.1 mm (7.4 in)	1947	86.1 mm (3.4 in)	85
Longest dry spell (CDD)	90 days	1877	39 days	85

Hottest day (TXx)

The hottest day of the year at Bunbury Post Office, 1877 to 1985. The record is 40.9 C (105.6 F) in 1980, marked on the chart; the median year is 36.6 C (97.9 F).

Hottest day (TXx) at Bunbury Post Office by year
Year	Hottest day (TXx)
1877	n/a
1879	n/a
1882	n/a
1891	n/a
1894	n/a
1902	n/a
1903	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	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	37.0 C (98.6 F)
1966	34.9 C (94.8 F)
1967	36.1 C (97.0 F)
1968	38.3 C (100.9 F)
1969	35.7 C (96.3 F)
1970	37.8 C (100.0 F)
1971	35.6 C (96.1 F)
1972	37.3 C (99.1 F)
1973	36.3 C (97.3 F)
1974	35.3 C (95.5 F)
1975	38.9 C (102.0 F)
1976	35.7 C (96.3 F)
1977	38.0 C (100.4 F)
1978	39.5 C (103.1 F)
1979	36.6 C (97.9 F)
1980	40.9 C (105.6 F)
1981	38.8 C (101.8 F)
1982	35.6 C (96.1 F)
1983	35.5 C (95.9 F)
1984	37.8 C (100.0 F)
1985	36.5 C (97.7 F)

Coldest night (TNn)

The coldest night of the year at Bunbury Post Office, 1877 to 1985. The record is 0.3 C (32.5 F) in 1981, marked on the chart; the median year is 2.7 C (36.9 F).

Coldest night (TNn) at Bunbury Post Office by year
Year	Coldest night (TNn)
1877	n/a
1879	n/a
1882	n/a
1891	n/a
1894	n/a
1902	n/a
1903	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	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	2.7 C (36.9 F)
1966	2.3 C (36.1 F)
1967	2.8 C (37.0 F)
1968	1.2 C (34.2 F)
1969	1.2 C (34.2 F)
1970	3.2 C (37.8 F)
1971	3.5 C (38.3 F)
1972	2.8 C (37.0 F)
1973	1.8 C (35.2 F)
1974	4.1 C (39.4 F)
1975	2.4 C (36.3 F)
1976	2.8 C (37.0 F)
1977	2.1 C (35.8 F)
1978	2.5 C (36.5 F)
1979	1.8 C (35.2 F)
1980	2.8 C (37.0 F)
1981	0.3 C (32.5 F)
1982	1.6 C (34.9 F)
1983	3.4 C (38.1 F)
1984	3.6 C (38.5 F)
1985	6.2 C (43.2 F)

Wettest day (Rx1day)

The wettest day of the year at Bunbury Post Office, 1877 to 1985. The record is 115.4 mm (4.5 in) in 1982, marked on the chart; the median year is 50.0 mm (2.0 in).

Wettest day (Rx1day) at Bunbury Post Office by year
Year	Wettest day (Rx1day)
1877	0.0 mm (0.00 in)
1879	0.0 mm (0.00 in)
1882	0.0 mm (0.00 in)
1891	0.0 mm (0.00 in)
1894	0.0 mm (0.00 in)
1902	0.0 mm (0.00 in)
1903	0.0 mm (0.00 in)
1907	46.7 mm (1.8 in)
1908	50.3 mm (2.0 in)
1909	45.7 mm (1.8 in)
1910	59.2 mm (2.3 in)
1911	51.6 mm (2.0 in)
1912	57.9 mm (2.3 in)
1913	66.5 mm (2.6 in)
1914	50.5 mm (2.0 in)
1915	85.9 mm (3.4 in)
1916	54.9 mm (2.2 in)
1917	66.5 mm (2.6 in)
1918	65.5 mm (2.6 in)
1919	75.4 mm (3.0 in)
1920	49.8 mm (2.0 in)
1921	65.5 mm (2.6 in)
1922	47.0 mm (1.9 in)
1923	44.7 mm (1.8 in)
1924	37.1 mm (1.5 in)
1925	58.7 mm (2.3 in)
1926	33.8 mm (1.3 in)
1927	52.3 mm (2.1 in)
1928	35.1 mm (1.4 in)
1929	80.0 mm (3.1 in)
1930	44.5 mm (1.8 in)
1931	41.1 mm (1.6 in)
1932	33.8 mm (1.3 in)
1933	37.1 mm (1.5 in)
1934	61.5 mm (2.4 in)
1935	35.3 mm (1.4 in)
1936	53.8 mm (2.1 in)
1937	46.5 mm (1.8 in)
1938	34.8 mm (1.4 in)
1939	51.8 mm (2.0 in)
1940	44.2 mm (1.7 in)
1941	59.9 mm (2.4 in)
1942	85.6 mm (3.4 in)
1943	47.8 mm (1.9 in)
1944	94.5 mm (3.7 in)
1945	72.4 mm (2.9 in)
1946	63.0 mm (2.5 in)
1947	82.0 mm (3.2 in)
1948	55.4 mm (2.2 in)
1949	58.9 mm (2.3 in)
1950	73.7 mm (2.9 in)
1951	44.2 mm (1.7 in)
1952	44.2 mm (1.7 in)
1953	39.9 mm (1.6 in)
1954	54.6 mm (2.1 in)
1955	51.8 mm (2.0 in)
1956	36.1 mm (1.4 in)
1957	61.0 mm (2.4 in)
1958	56.1 mm (2.2 in)
1959	56.1 mm (2.2 in)
1960	51.1 mm (2.0 in)
1961	50.0 mm (2.0 in)
1962	32.0 mm (1.3 in)
1963	43.4 mm (1.7 in)
1964	53.1 mm (2.1 in)
1965	62.2 mm (2.4 in)
1966	36.8 mm (1.4 in)
1967	n/a
1968	31.2 mm (1.2 in)
1969	36.8 mm (1.4 in)
1970	57.2 mm (2.3 in)
1971	45.2 mm (1.8 in)
1972	47.8 mm (1.9 in)
1973	36.3 mm (1.4 in)
1974	63.2 mm (2.5 in)
1975	26.2 mm (1.0 in)
1976	65.6 mm (2.6 in)
1977	30.8 mm (1.2 in)
1978	46.4 mm (1.8 in)
1979	20.4 mm (0.8 in)
1980	38.1 mm (1.5 in)
1981	65.8 mm (2.6 in)
1982	115.4 mm (4.5 in)
1983	56.6 mm (2.2 in)
1984	49.2 mm (1.9 in)
1985	98.0 mm (3.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bunbury Post Office, 1877 to 1985. The record is 188.1 mm (7.4 in) in 1947, marked on the chart; the median year is 86.1 mm (3.4 in).

Wettest five days (Rx5day) at Bunbury Post Office by year
Year	Wettest five days (Rx5day)
1877	0.0 mm (0.00 in)
1879	0.0 mm (0.00 in)
1882	0.0 mm (0.00 in)
1891	0.0 mm (0.00 in)
1894	0.0 mm (0.00 in)
1902	0.0 mm (0.00 in)
1903	0.0 mm (0.00 in)
1907	64.7 mm (2.5 in)
1908	96.0 mm (3.8 in)
1909	85.8 mm (3.4 in)
1910	124.7 mm (4.9 in)
1911	111.8 mm (4.4 in)
1912	69.8 mm (2.7 in)
1913	106.2 mm (4.2 in)
1914	88.2 mm (3.5 in)
1915	91.8 mm (3.6 in)
1916	85.1 mm (3.4 in)
1917	100.2 mm (3.9 in)
1918	99.1 mm (3.9 in)
1919	101.8 mm (4.0 in)
1920	103.5 mm (4.1 in)
1921	120.4 mm (4.7 in)
1922	95.0 mm (3.7 in)
1923	87.6 mm (3.4 in)
1924	90.6 mm (3.6 in)
1925	92.2 mm (3.6 in)
1926	100.8 mm (4.0 in)
1927	77.2 mm (3.0 in)
1928	77.3 mm (3.0 in)
1929	134.1 mm (5.3 in)
1930	112.9 mm (4.4 in)
1931	63.5 mm (2.5 in)
1932	68.4 mm (2.7 in)
1933	67.1 mm (2.6 in)
1934	67.3 mm (2.6 in)
1935	65.5 mm (2.6 in)
1936	68.8 mm (2.7 in)
1937	80.3 mm (3.2 in)
1938	73.9 mm (2.9 in)
1939	100.9 mm (4.0 in)
1940	72.1 mm (2.8 in)
1941	70.6 mm (2.8 in)
1942	114.3 mm (4.5 in)
1943	89.4 mm (3.5 in)
1944	115.0 mm (4.5 in)
1945	106.7 mm (4.2 in)
1946	129.4 mm (5.1 in)
1947	188.1 mm (7.4 in)
1948	87.4 mm (3.4 in)
1949	105.9 mm (4.2 in)
1950	104.7 mm (4.1 in)
1951	89.7 mm (3.5 in)
1952	62.8 mm (2.5 in)
1953	55.8 mm (2.2 in)
1954	75.0 mm (3.0 in)
1955	85.6 mm (3.4 in)
1956	43.5 mm (1.7 in)
1957	73.9 mm (2.9 in)
1958	140.4 mm (5.5 in)
1959	86.1 mm (3.4 in)
1960	87.0 mm (3.4 in)
1961	88.9 mm (3.5 in)
1962	62.8 mm (2.5 in)
1963	94.9 mm (3.7 in)
1964	122.0 mm (4.8 in)
1965	69.3 mm (2.7 in)
1966	82.0 mm (3.2 in)
1967	n/a
1968	63.3 mm (2.5 in)
1969	69.8 mm (2.7 in)
1970	76.0 mm (3.0 in)
1971	91.4 mm (3.6 in)
1972	89.3 mm (3.5 in)
1973	78.8 mm (3.1 in)
1974	107.9 mm (4.2 in)
1975	56.7 mm (2.2 in)
1976	99.9 mm (3.9 in)
1977	65.4 mm (2.6 in)
1978	66.2 mm (2.6 in)
1979	49.2 mm (1.9 in)
1980	77.2 mm (3.0 in)
1981	106.4 mm (4.2 in)
1982	151.8 mm (6.0 in)
1983	105.8 mm (4.2 in)
1984	83.4 mm (3.3 in)
1985	120.7 mm (4.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bunbury Post Office, 1877 to 1985. The record is 90 days in 1877, marked on the chart; the median year is 39 days.

Longest dry spell (CDD) at Bunbury Post Office by year
Year	Longest dry spell (CDD)
1877	90 days
1879	30 days
1882	31 days
1891	30 days
1894	31 days
1902	31 days
1903	28 days
1907	60 days
1908	38 days
1909	54 days
1910	42 days
1911	51 days
1912	38 days
1913	33 days
1914	38 days
1915	28 days
1916	38 days
1917	40 days
1918	29 days
1919	37 days
1920	63 days
1921	27 days
1922	24 days
1923	59 days
1924	46 days
1925	28 days
1926	37 days
1927	28 days
1928	39 days
1929	35 days
1930	35 days
1931	42 days
1932	32 days
1933	32 days
1934	19 days
1935	31 days
1936	33 days
1937	41 days
1938	58 days
1939	52 days
1940	28 days
1941	56 days
1942	58 days
1943	39 days
1944	86 days
1945	32 days
1946	47 days
1947	27 days
1948	63 days
1949	42 days
1950	50 days
1951	23 days
1952	63 days
1953	55 days
1954	35 days
1955	47 days
1956	59 days
1957	76 days
1958	26 days
1959	52 days
1960	34 days
1961	34 days
1962	63 days
1963	50 days
1964	55 days
1965	26 days
1966	46 days
1967	n/a
1968	19 days
1969	51 days
1970	48 days
1971	29 days
1972	62 days
1973	59 days
1974	52 days
1975	66 days
1976	38 days
1977	63 days
1978	39 days
1979	26 days
1980	41 days
1981	64 days
1982	40 days
1983	43 days
1984	67 days
1985	26 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

76 years, 1907 to 1984

A day with at least 50.3 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 101.8 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Bunbury Post Office: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	50.3 mm (2.0 in)
5 years	64.9 mm (2.6 in)
10 years	74.2 mm (2.9 in)
25 years	85.6 mm (3.4 in)
50 years	93.8 mm (3.7 in)
100 years	101.8 mm (4.0 in)	Longer than the 76 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, 76 years of values from 1907 to 1984.

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: 115.4 mm (4.5 in) in 1982; 94.5 mm (3.7 in) in 1944; 85.9 mm (3.4 in) in 1915.

Download the Data

Data for Bunbury Post Office standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bunbury Post Office 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).