Harrow (Post Office) Weather Records (ASN00079021)

Record envelope, standing records and threshold days for Harrow (Post Office) (ASN00079021), Australia, with 118 years of record.

Key Facts for Harrow (Post Office)

Harrow (Post Office) (ASN00079021) is a weather station in Australia at -37.17 latitude and 141.59 longitude, 116 m (381 ft) above sea level.
The station reports from 1908 to 2025, 118 years of record.
0 records set at Harrow (Post Office) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Harrow (Post Office) set a daily record precipitation of 24.2 mm (1.0 in) on 25 July 2025.

About the Station

Location: Australia, -37.17 latitude, 141.59 longitude.
Elevation: 116 m (381 ft).
Period of record: 1908 to 2025, 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 Harrow (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 Harrow (Post Office), 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 Harrow (Post Office) still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Harrow (Post Office) between 18 March 1946 and 18 March 1946. Each dot is a new record.

Wettest Day of Each Month

Mar: 108.0 mm (4.3 in)

The wettest day on record for each calendar month at Harrow (Post Office). The most was 108.0 mm (4.3 in) on 18 March 1946.

Record daily precipitation for each month at Harrow (Post Office)
Month	Record daily precipitation (mm)	Date
Jan	89.7 mm (3.5 in)	25 January 1952
Feb	76.2 mm (3.0 in)	19 February 1924
Mar	108.0 mm (4.3 in)	18 March 1946
Apr	64.0 mm (2.5 in)	23 April 1980
May	52.1 mm (2.1 in)	24 May 1958
Jun	49.0 mm (1.9 in)	6 June 2023
Jul	38.1 mm (1.5 in)	12 July 1964
Aug	39.4 mm (1.6 in)	8 August 1955
Sep	50.2 mm (2.0 in)	23 September 1998
Oct	69.3 mm (2.7 in)	29 October 1969
Nov	47.2 mm (1.9 in)	15 November 1970
Dec	72.0 mm (2.8 in)	7 December 2010

Latest Records

Latest records at Harrow (Post Office)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 July 2025	Harrow (Post Office), AU	daily rain	24.2 mm (1.0 in)	8.2 mm (0.32 in)	88 years	20 of 100 (Routine)
24 June 2025	Harrow (Post Office), AU	daily rain	29.0 mm (1.1 in)	9.9 mm (0.39 in)	112 years	57 of 100 (Notable)
27 November 2024	Harrow (Post Office), AU	daily rain	10.0 mm (0.4 in)	0.1 mm (0.00 in)	72 years	20 of 100 (Routine)
8 January 2024	Harrow (Post Office), AU	daily rain	53.0 mm (2.1 in)	41.3 mm (1.6 in)	52 years	65 of 100 (Major)
7 January 2024	Harrow (Post Office), AU	daily rain	15.2 mm (0.6 in)	1.2 mm (0.05 in)	41 years	20 of 100 (Routine)
24 November 2023	Harrow (Post Office), AU	daily rain	37.0 mm (1.5 in)	8.0 mm (0.31 in)	92 years	48 of 100 (Notable)
25 June 2023	Harrow (Post Office), AU	daily rain	23.6 mm (0.9 in)	6.1 mm (0.24 in)	100 years	20 of 100 (Routine)
6 June 2023	Harrow (Post Office), AU	monthly rain	49.0 mm (1.9 in)	8.1 mm (0.32 in)	107 years	64 of 100 (Major)
6 April 2023	Harrow (Post Office), AU	daily rain	35.5 mm (1.4 in)	12.6 mm (0.5 in)	72 years	49 of 100 (Notable)
13 November 2022	Harrow (Post Office), AU	daily rain	15.0 mm (0.6 in)	3.8 mm (0.15 in)	56 years	20 of 100 (Routine)
11 November 2022	Harrow (Post Office), AU	daily rain	31.6 mm (1.2 in)	8.6 mm (0.34 in)	43 years	34 of 100 (Routine)
30 April 2014	Harrow (Post Office), AU	daily rain	26.8 mm (1.1 in)	8.8 mm (0.35 in)	73 years	44 of 100 (Notable)
2 January 2014	Harrow (Post Office), AU	daily rain	26.4 mm (1.0 in)	10.9 mm (0.4 in)	76 years	45 of 100 (Notable)
19 July 2013	Harrow (Post Office), AU	daily rain	19.0 mm (0.7 in)	2.6 mm (0.10 in)	14 years	19 of 100 (Routine)
13 July 2013	Harrow (Post Office), AU	daily rain	20.0 mm (0.8 in)	3.2 mm (0.13 in)	48 years	20 of 100 (Routine)
4 March 2012	Harrow (Post Office), AU	daily rain	24.6 mm (1.0 in)	14.7 mm (0.6 in)	65 years	20 of 100 (Routine)
3 August 2011	Harrow (Post Office), AU	daily rain	24.6 mm (1.0 in)	7.8 mm (0.31 in)	76 years	20 of 100 (Routine)
21 June 2011	Harrow (Post Office), AU	daily rain	18.1 mm (0.7 in)	1.9 mm (0.07 in)	12 years	16 of 100 (Routine)
21 March 2011	Harrow (Post Office), AU	daily rain	27.0 mm (1.1 in)	2.4 mm (0.09 in)	76 years	34 of 100 (Routine)
10 March 2011	Harrow (Post Office), AU	daily rain	28.0 mm (1.1 in)	19.9 mm (0.8 in)	66 years	52 of 100 (Notable)

Extremes by Year

1908 to 2025

Yearly extremes at Harrow (Post Office): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	108.0 mm (4.3 in)	1946	33.0 mm (1.3 in)	111
Wettest five days (Rx5day)	154.5 mm (6.1 in)	1946	53.5 mm (2.1 in)	107
Longest dry spell (CDD)	67 days	1923	30 days	110

Wettest day (Rx1day)

The wettest day of the year at Harrow (Post Office), 1908 to 2025. The record is 108.0 mm (4.3 in) in 1946, marked on the chart; the median year is 33.0 mm (1.3 in).

Wettest day (Rx1day) at Harrow (Post Office) by year
Year	Wettest day (Rx1day)
1908	6.4 mm (0.25 in)
1909	24.9 mm (1.0 in)
1910	89.9 mm (3.5 in)
1911	43.4 mm (1.7 in)
1912	21.3 mm (0.8 in)
1913	48.3 mm (1.9 in)
1914	18.0 mm (0.7 in)
1915	40.9 mm (1.6 in)
1916	33.0 mm (1.3 in)
1917	33.0 mm (1.3 in)
1918	29.0 mm (1.1 in)
1919	30.2 mm (1.2 in)
1920	32.5 mm (1.3 in)
1921	41.1 mm (1.6 in)
1922	21.1 mm (0.8 in)
1923	33.0 mm (1.3 in)
1924	76.2 mm (3.0 in)
1925	33.5 mm (1.3 in)
1926	41.4 mm (1.6 in)
1927	28.2 mm (1.1 in)
1928	58.4 mm (2.3 in)
1929	32.8 mm (1.3 in)
1930	53.3 mm (2.1 in)
1931	37.3 mm (1.5 in)
1932	24.4 mm (1.0 in)
1933	42.4 mm (1.7 in)
1934	32.5 mm (1.3 in)
1935	29.2 mm (1.1 in)
1936	39.1 mm (1.5 in)
1937	32.0 mm (1.3 in)
1938	45.0 mm (1.8 in)
1939	27.4 mm (1.1 in)
1940	20.1 mm (0.8 in)
1941	70.1 mm (2.8 in)
1942	24.1 mm (0.9 in)
1943	22.9 mm (0.9 in)
1944	27.4 mm (1.1 in)
1945	41.9 mm (1.6 in)
1946	108.0 mm (4.3 in)
1947	48.0 mm (1.9 in)
1948	65.8 mm (2.6 in)
1949	46.5 mm (1.8 in)
1950	33.3 mm (1.3 in)
1951	37.3 mm (1.5 in)
1952	89.7 mm (3.5 in)
1953	29.2 mm (1.1 in)
1954	38.1 mm (1.5 in)
1955	40.1 mm (1.6 in)
1956	25.1 mm (1.0 in)
1957	64.0 mm (2.5 in)
1958	52.1 mm (2.1 in)
1959	26.4 mm (1.0 in)
1960	36.8 mm (1.4 in)
1961	50.3 mm (2.0 in)
1962	22.6 mm (0.9 in)
1963	48.5 mm (1.9 in)
1964	43.2 mm (1.7 in)
1965	32.0 mm (1.3 in)
1966	38.9 mm (1.5 in)
1967	21.1 mm (0.8 in)
1968	23.9 mm (0.9 in)
1969	69.3 mm (2.7 in)
1970	47.2 mm (1.9 in)
1971	36.6 mm (1.4 in)
1972	22.4 mm (0.9 in)
1973	64.5 mm (2.5 in)
1974	45.2 mm (1.8 in)
1975	24.0 mm (0.9 in)
1976	37.6 mm (1.5 in)
1977	38.0 mm (1.5 in)
1978	41.6 mm (1.6 in)
1979	33.0 mm (1.3 in)
1980	64.0 mm (2.5 in)
1981	22.0 mm (0.9 in)
1982	27.0 mm (1.1 in)
1983	35.0 mm (1.4 in)
1984	33.0 mm (1.3 in)
1985	42.0 mm (1.7 in)
1986	26.0 mm (1.0 in)
1987	27.0 mm (1.1 in)
1988	19.2 mm (0.8 in)
1989	30.8 mm (1.2 in)
1990	25.2 mm (1.0 in)
1991	33.0 mm (1.3 in)
1992	29.6 mm (1.2 in)
1993	28.2 mm (1.1 in)
1994	26.0 mm (1.0 in)
1995	40.6 mm (1.6 in)
1996	32.8 mm (1.3 in)
1997	34.0 mm (1.3 in)
1998	50.2 mm (2.0 in)
1999	33.2 mm (1.3 in)
2000	21.2 mm (0.8 in)
2001	26.2 mm (1.0 in)
2002	19.0 mm (0.7 in)
2003	54.0 mm (2.1 in)
2004	28.0 mm (1.1 in)
2005	24.4 mm (1.0 in)
2006	20.0 mm (0.8 in)
2007	46.0 mm (1.8 in)
2008	66.3 mm (2.6 in)
2009	23.0 mm (0.9 in)
2010	72.0 mm (2.8 in)
2011	45.0 mm (1.8 in)
2012	24.6 mm (1.0 in)
2013	28.0 mm (1.1 in)
2014	26.8 mm (1.1 in)
2022	31.6 mm (1.2 in)
2023	49.0 mm (1.9 in)
2024	53.0 mm (2.1 in)
2025	29.0 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Harrow (Post Office), 1908 to 2025. The record is 154.5 mm (6.1 in) in 1946, marked on the chart; the median year is 53.5 mm (2.1 in).

Wettest five days (Rx5day) at Harrow (Post Office) by year
Year	Wettest five days (Rx5day)
1908	12.7 mm (0.5 in)
1909	53.5 mm (2.1 in)
1910	110.4 mm (4.3 in)
1911	75.5 mm (3.0 in)
1912	36.8 mm (1.4 in)
1913	67.1 mm (2.6 in)
1914	21.6 mm (0.9 in)
1915	58.3 mm (2.3 in)
1916	68.3 mm (2.7 in)
1917	52.3 mm (2.1 in)
1918	72.4 mm (2.9 in)
1919	69.3 mm (2.7 in)
1920	48.2 mm (1.9 in)
1921	45.3 mm (1.8 in)
1922	45.2 mm (1.8 in)
1923	54.6 mm (2.1 in)
1924	121.1 mm (4.8 in)
1925	57.7 mm (2.3 in)
1926	52.8 mm (2.1 in)
1927	54.6 mm (2.1 in)
1928	71.4 mm (2.8 in)
1929	44.5 mm (1.8 in)
1930	65.6 mm (2.6 in)
1931	62.4 mm (2.5 in)
1932	41.0 mm (1.6 in)
1933	68.8 mm (2.7 in)
1934	49.3 mm (1.9 in)
1935	52.9 mm (2.1 in)
1936	73.1 mm (2.9 in)
1937	63.8 mm (2.5 in)
1938	54.4 mm (2.1 in)
1939	49.9 mm (2.0 in)
1940	29.5 mm (1.2 in)
1941	118.6 mm (4.7 in)
1942	50.0 mm (2.0 in)
1943	45.7 mm (1.8 in)
1944	34.3 mm (1.4 in)
1945	48.8 mm (1.9 in)
1946	154.5 mm (6.1 in)
1947	86.2 mm (3.4 in)
1948	86.1 mm (3.4 in)
1949	65.0 mm (2.6 in)
1950	54.4 mm (2.1 in)
1951	60.1 mm (2.4 in)
1952	97.1 mm (3.8 in)
1953	61.2 mm (2.4 in)
1954	51.8 mm (2.0 in)
1955	67.3 mm (2.6 in)
1956	51.0 mm (2.0 in)
1957	73.9 mm (2.9 in)
1958	78.4 mm (3.1 in)
1959	49.8 mm (2.0 in)
1960	45.2 mm (1.8 in)
1961	87.2 mm (3.4 in)
1962	47.4 mm (1.9 in)
1963	86.6 mm (3.4 in)
1964	87.8 mm (3.5 in)
1965	35.5 mm (1.4 in)
1966	46.2 mm (1.8 in)
1967	32.1 mm (1.3 in)
1968	58.8 mm (2.3 in)
1969	71.4 mm (2.8 in)
1970	76.4 mm (3.0 in)
1971	54.9 mm (2.2 in)
1972	47.0 mm (1.9 in)
1973	74.7 mm (2.9 in)
1974	85.8 mm (3.4 in)
1975	72.0 mm (2.8 in)
1976	45.4 mm (1.8 in)
1977	39.2 mm (1.5 in)
1978	45.0 mm (1.8 in)
1979	58.0 mm (2.3 in)
1980	129.4 mm (5.1 in)
1981	46.0 mm (1.8 in)
1982	36.4 mm (1.4 in)
1983	60.0 mm (2.4 in)
1984	43.3 mm (1.7 in)
1985	46.0 mm (1.8 in)
1986	52.0 mm (2.0 in)
1987	47.9 mm (1.9 in)
1988	36.0 mm (1.4 in)
1989	34.4 mm (1.4 in)
1990	31.6 mm (1.2 in)
1991	77.0 mm (3.0 in)
1992	39.8 mm (1.6 in)
1993	42.8 mm (1.7 in)
1994	46.2 mm (1.8 in)
1995	85.4 mm (3.4 in)
1996	67.8 mm (2.7 in)
1997	62.8 mm (2.5 in)
1998	30.8 mm (1.2 in)
1999	49.0 mm (1.9 in)
2000	37.4 mm (1.5 in)
2001	47.4 mm (1.9 in)
2002	35.8 mm (1.4 in)
2003	55.0 mm (2.2 in)
2004	47.8 mm (1.9 in)
2005	47.8 mm (1.9 in)
2006	31.2 mm (1.2 in)
2007	72.2 mm (2.8 in)
2008	72.3 mm (2.8 in)
2009	41.6 mm (1.6 in)
2010	53.7 mm (2.1 in)
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2022	52.2 mm (2.1 in)
2023	71.6 mm (2.8 in)
2024	68.2 mm (2.7 in)
2025	44.6 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Harrow (Post Office), 1908 to 2025. The record is 67 days in 1923, marked on the chart; the median year is 30 days.

Longest dry spell (CDD) at Harrow (Post Office) by year
Year	Longest dry spell (CDD)
1908	24 days
1909	31 days
1910	24 days
1911	21 days
1912	39 days
1913	29 days
1914	37 days
1915	39 days
1916	55 days
1917	24 days
1918	33 days
1919	36 days
1920	45 days
1921	29 days
1922	43 days
1923	67 days
1924	29 days
1925	31 days
1926	39 days
1927	28 days
1928	30 days
1929	21 days
1930	39 days
1931	28 days
1932	35 days
1933	32 days
1934	29 days
1935	38 days
1936	28 days
1937	21 days
1938	25 days
1939	22 days
1940	28 days
1941	27 days
1942	20 days
1943	32 days
1944	22 days
1945	40 days
1946	22 days
1947	24 days
1948	37 days
1949	29 days
1950	28 days
1951	42 days
1952	30 days
1953	51 days
1954	49 days
1955	28 days
1956	42 days
1957	37 days
1958	48 days
1959	33 days
1960	25 days
1961	25 days
1962	32 days
1963	41 days
1964	21 days
1965	32 days
1966	27 days
1967	38 days
1968	30 days
1969	35 days
1970	28 days
1971	28 days
1972	37 days
1973	15 days
1974	46 days
1975	38 days
1976	17 days
1977	30 days
1978	19 days
1979	26 days
1980	38 days
1981	23 days
1982	23 days
1983	33 days
1984	32 days
1985	29 days
1986	61 days
1987	47 days
1988	31 days
1989	23 days
1990	19 days
1991	38 days
1992	24 days
1993	26 days
1994	36 days
1995	14 days
1996	16 days
1997	29 days
1998	35 days
1999	40 days
2000	50 days
2001	31 days
2002	55 days
2003	25 days
2004	21 days
2005	28 days
2006	35 days
2007	27 days
2008	32 days
2009	61 days
2010	1 day
2011	1 day
2012	1 day
2013	1 day
2014	n/a
2022	11 days
2023	26 days
2024	65 days
2025	34 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

87 years, 1909 to 2024

A day with at least 35.3 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 106.4 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Harrow (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	35.3 mm (1.4 in)
5 years	49.5 mm (1.9 in)
10 years	60.6 mm (2.4 in)
25 years	76.8 mm (3.0 in)
50 years	90.8 mm (3.6 in)
100 years	106.4 mm (4.2 in)	Longer than the 87 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, 87 years of values from 1909 to 2024.

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: 108.0 mm (4.3 in) in 1946; 89.9 mm (3.5 in) in 1910; 89.7 mm (3.5 in) in 1952.

Download the Data

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