Merton Weir Farm Weather Records (ASN00088112)

Record envelope, standing records and threshold days for Merton Weir Farm (ASN00088112), Australia, with 89 years of record.

Key Facts for Merton Weir Farm

Merton Weir Farm (ASN00088112) is a weather station in Australia at -36.98 latitude and 145.72 longitude, 331 m (1,085 ft) above sea level.
The station reports from 1902 to 1990, 89 years of record.
0 records set at Merton Weir Farm still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Merton Weir Farm set a daily record precipitation of 30.0 mm (1.2 in) on 13 August 1990.

About the Station

Location: Australia, -36.98 latitude, 145.72 longitude.
Elevation: 331 m (1,085 ft).
Period of record: 1902 to 1990, 89 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 Merton Weir Farm. 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 Merton Weir Farm, 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 Merton Weir Farm still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Merton Weir Farm between 18 March 1950 and 18 March 1950. Each dot is a new record.

Wettest Day of Each Month

Mar: 170.2 mm (6.7 in)

The wettest day on record for each calendar month at Merton Weir Farm. The most was 170.2 mm (6.7 in) on 18 March 1950.

Record daily precipitation for each month at Merton Weir Farm
Month	Record daily precipitation (mm)	Date
Jan	95.3 mm (3.8 in)	3 January 1941
Feb	59.7 mm (2.4 in)	14 February 1959
Mar	170.2 mm (6.7 in)	18 March 1950
Apr	71.1 mm (2.8 in)	8 April 1939
May	78.7 mm (3.1 in)	13 May 1918
Jun	53.1 mm (2.1 in)	2 June 1907
Jul	76.0 mm (3.0 in)	17 July 1990
Aug	60.0 mm (2.4 in)	12 August 1990
Sep	101.3 mm (4.0 in)	24 September 1916
Oct	64.8 mm (2.6 in)	21 October 1953
Nov	64.0 mm (2.5 in)	19 November 1978
Dec	60.7 mm (2.4 in)	12 December 1954

Latest Records

Latest records at Merton Weir Farm
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 August 1990	Merton Weir Farm, AU	daily rain	30.0 mm (1.2 in)	13.0 mm (0.5 in)	8 years	27 of 100 (Routine)
12 August 1990	Merton Weir Farm, AU	monthly rain	60.0 mm (2.4 in)	10.7 mm (0.4 in)	79 years	55 of 100 (Notable)
17 July 1990	Merton Weir Farm, AU	monthly rain	76.0 mm (3.0 in)	20.1 mm (0.8 in)	35 years	54 of 100 (Notable)
12 April 1990	Merton Weir Farm, AU	daily rain	32.0 mm (1.3 in)	7.1 mm (0.28 in)	39 years	26 of 100 (Routine)
10 February 1990	Merton Weir Farm, AU	daily rain	17.0 mm (0.7 in)	1.5 mm (0.06 in)	79 years	20 of 100 (Routine)
16 October 1989	Merton Weir Farm, AU	daily rain	52.0 mm (2.0 in)	23.0 mm (0.9 in)	2 years	35 of 100 (Notable)
30 May 1989	Merton Weir Farm, AU	daily rain	23.4 mm (0.9 in)	2.1 mm (0.08 in)	50 years	20 of 100 (Routine)
23 May 1989	Merton Weir Farm, AU	daily rain	26.0 mm (1.0 in)	7.6 mm (0.30 in)	4 years	17 of 100 (Routine)
13 April 1989	Merton Weir Farm, AU	daily rain	46.0 mm (1.8 in)	25.4 mm (1.0 in)	38 years	46 of 100 (Notable)
11 April 1989	Merton Weir Farm, AU	daily rain	44.0 mm (1.7 in)	24.2 mm (1.0 in)	86 years	59 of 100 (Notable)
11 September 1988	Merton Weir Farm, AU	daily rain	44.4 mm (1.7 in)	10.8 mm (0.4 in)	9 years	21 of 100 (Routine)
22 August 1988	Merton Weir Farm, AU	daily rain	30.0 mm (1.2 in)	4.3 mm (0.17 in)	80 years	37 of 100 (Notable)
19 August 1988	Merton Weir Farm, AU	daily rain	44.0 mm (1.7 in)	11.5 mm (0.5 in)	22 years	29 of 100 (Routine)
9 July 1988	Merton Weir Farm, AU	daily rain	44.0 mm (1.7 in)	26.7 mm (1.1 in)	54 years	59 of 100 (Notable)
27 April 1988	Merton Weir Farm, AU	daily rain	25.6 mm (1.0 in)	7.3 mm (0.29 in)	15 years	19 of 100 (Routine)
31 March 1988	Merton Weir Farm, AU	daily rain	21.0 mm (0.8 in)	6.0 mm (0.24 in)	10 years	14 of 100 (Routine)
24 January 1988	Merton Weir Farm, AU	daily rain	7.6 mm (0.30 in)	1.0 mm (0.04 in)	33 years	18 of 100 (Routine)
2 December 1987	Merton Weir Farm, AU	daily rain	52.0 mm (2.0 in)	19.7 mm (0.8 in)	17 years	31 of 100 (Routine)
24 November 1987	Merton Weir Farm, AU	daily rain	20.0 mm (0.8 in)	0.2 mm (0.01 in)	8 years	10 of 100 (Routine)
16 October 1987	Merton Weir Farm, AU	daily rain	29.0 mm (1.1 in)	3.6 mm (0.14 in)	78 years	35 of 100 (Notable)

Extremes by Year

1902 to 1990

Yearly extremes at Merton Weir Farm: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	170.2 mm (6.7 in)	1950	41.1 mm (1.6 in)	82
Wettest five days (Rx5day)	271.4 mm (10.7 in)	1950	76.7 mm (3.0 in)	82
Longest dry spell (CDD)	78 days	1923	29 days	82

Wettest day (Rx1day)

The wettest day of the year at Merton Weir Farm, 1902 to 1990. The record is 170.2 mm (6.7 in) in 1950, marked on the chart; the median year is 41.1 mm (1.6 in).

Wettest day (Rx1day) at Merton Weir Farm by year
Year	Wettest day (Rx1day)
1902	42.9 mm (1.7 in)
1903	71.1 mm (2.8 in)
1904	30.7 mm (1.2 in)
1905	39.4 mm (1.6 in)
1906	52.3 mm (2.1 in)
1907	53.1 mm (2.1 in)
1908	40.1 mm (1.6 in)
1909	38.1 mm (1.5 in)
1910	49.3 mm (1.9 in)
1911	41.1 mm (1.6 in)
1912	53.8 mm (2.1 in)
1913	43.7 mm (1.7 in)
1914	50.8 mm (2.0 in)
1915	41.1 mm (1.6 in)
1916	101.3 mm (4.0 in)
1917	34.3 mm (1.4 in)
1918	78.7 mm (3.1 in)
1922	55.9 mm (2.2 in)
1923	47.2 mm (1.9 in)
1924	28.4 mm (1.1 in)
1925	41.1 mm (1.6 in)
1927	22.6 mm (0.9 in)
1928	51.8 mm (2.0 in)
1930	0.0 mm (0.00 in)
1933	0.0 mm (0.00 in)
1934	52.3 mm (2.1 in)
1935	43.2 mm (1.7 in)
1936	39.1 mm (1.5 in)
1937	37.3 mm (1.5 in)
1938	32.3 mm (1.3 in)
1939	71.1 mm (2.8 in)
1940	42.9 mm (1.7 in)
1941	95.3 mm (3.8 in)
1942	33.0 mm (1.3 in)
1943	50.8 mm (2.0 in)
1944	38.1 mm (1.5 in)
1945	45.7 mm (1.8 in)
1946	33.5 mm (1.3 in)
1947	58.4 mm (2.3 in)
1948	50.8 mm (2.0 in)
1949	45.7 mm (1.8 in)
1950	170.2 mm (6.7 in)
1951	39.9 mm (1.6 in)
1952	24.1 mm (0.9 in)
1953	64.8 mm (2.6 in)
1954	60.7 mm (2.4 in)
1955	57.9 mm (2.3 in)
1956	50.0 mm (2.0 in)
1957	26.4 mm (1.0 in)
1958	32.8 mm (1.3 in)
1959	59.7 mm (2.4 in)
1960	35.6 mm (1.4 in)
1961	30.5 mm (1.2 in)
1962	30.5 mm (1.2 in)
1963	41.7 mm (1.6 in)
1964	33.0 mm (1.3 in)
1965	32.3 mm (1.3 in)
1966	36.8 mm (1.4 in)
1967	26.7 mm (1.1 in)
1968	40.6 mm (1.6 in)
1969	40.9 mm (1.6 in)
1970	60.2 mm (2.4 in)
1971	29.7 mm (1.2 in)
1972	30.7 mm (1.2 in)
1973	49.5 mm (1.9 in)
1974	38.6 mm (1.5 in)
1975	36.0 mm (1.4 in)
1976	32.4 mm (1.3 in)
1977	56.2 mm (2.2 in)
1978	64.0 mm (2.5 in)
1979	33.6 mm (1.3 in)
1980	37.8 mm (1.5 in)
1981	29.0 mm (1.1 in)
1982	31.0 mm (1.2 in)
1983	29.6 mm (1.2 in)
1984	38.0 mm (1.5 in)
1985	29.6 mm (1.2 in)
1986	52.6 mm (2.1 in)
1987	52.0 mm (2.0 in)
1988	44.4 mm (1.7 in)
1989	56.0 mm (2.2 in)
1990	76.0 mm (3.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Merton Weir Farm, 1902 to 1990. The record is 271.4 mm (10.7 in) in 1950, marked on the chart; the median year is 76.7 mm (3.0 in).

Wettest five days (Rx5day) at Merton Weir Farm by year
Year	Wettest five days (Rx5day)
1902	98.8 mm (3.9 in)
1903	80.5 mm (3.2 in)
1904	75.2 mm (3.0 in)
1905	78.2 mm (3.1 in)
1906	73.9 mm (2.9 in)
1907	55.4 mm (2.2 in)
1908	86.3 mm (3.4 in)
1909	100.3 mm (3.9 in)
1910	85.6 mm (3.4 in)
1911	66.9 mm (2.6 in)
1912	113.2 mm (4.5 in)
1913	66.6 mm (2.6 in)
1914	81.8 mm (3.2 in)
1915	103.1 mm (4.1 in)
1916	172.7 mm (6.8 in)
1917	93.5 mm (3.7 in)
1918	86.8 mm (3.4 in)
1922	66.6 mm (2.6 in)
1923	58.9 mm (2.3 in)
1924	52.5 mm (2.1 in)
1925	43.4 mm (1.7 in)
1927	70.6 mm (2.8 in)
1928	124.7 mm (4.9 in)
1930	0.0 mm (0.00 in)
1933	0.0 mm (0.00 in)
1934	102.4 mm (4.0 in)
1935	53.2 mm (2.1 in)
1936	82.0 mm (3.2 in)
1937	63.7 mm (2.5 in)
1938	39.9 mm (1.6 in)
1939	95.0 mm (3.7 in)
1940	44.9 mm (1.8 in)
1941	95.3 mm (3.8 in)
1942	71.1 mm (2.8 in)
1943	71.9 mm (2.8 in)
1944	59.5 mm (2.3 in)
1945	88.4 mm (3.5 in)
1946	67.3 mm (2.6 in)
1947	59.4 mm (2.3 in)
1948	84.4 mm (3.3 in)
1949	82.6 mm (3.3 in)
1950	271.4 mm (10.7 in)
1951	83.3 mm (3.3 in)
1952	51.8 mm (2.0 in)
1953	72.9 mm (2.9 in)
1954	98.1 mm (3.9 in)
1955	87.1 mm (3.4 in)
1956	113.0 mm (4.4 in)
1957	62.3 mm (2.5 in)
1958	79.3 mm (3.1 in)
1959	94.2 mm (3.7 in)
1960	82.5 mm (3.2 in)
1961	52.9 mm (2.1 in)
1962	38.1 mm (1.5 in)
1963	94.8 mm (3.7 in)
1964	97.9 mm (3.9 in)
1965	69.3 mm (2.7 in)
1966	69.1 mm (2.7 in)
1967	50.1 mm (2.0 in)
1968	79.2 mm (3.1 in)
1969	76.9 mm (3.0 in)
1970	109.0 mm (4.3 in)
1971	74.7 mm (2.9 in)
1972	42.4 mm (1.7 in)
1973	90.1 mm (3.5 in)
1974	84.8 mm (3.3 in)
1975	79.0 mm (3.1 in)
1976	53.4 mm (2.1 in)
1977	62.4 mm (2.5 in)
1978	68.0 mm (2.7 in)
1979	58.0 mm (2.3 in)
1980	96.8 mm (3.8 in)
1981	76.6 mm (3.0 in)
1982	46.6 mm (1.8 in)
1983	76.8 mm (3.0 in)
1984	60.4 mm (2.4 in)
1985	68.6 mm (2.7 in)
1986	88.8 mm (3.5 in)
1987	75.4 mm (3.0 in)
1988	76.0 mm (3.0 in)
1989	95.2 mm (3.7 in)
1990	118.4 mm (4.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Merton Weir Farm, 1902 to 1990. The record is 78 days in 1923, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Merton Weir Farm by year
Year	Longest dry spell (CDD)
1902	26 days
1903	36 days
1904	52 days
1905	28 days
1906	31 days
1907	32 days
1908	21 days
1909	31 days
1910	47 days
1911	30 days
1912	37 days
1913	25 days
1914	31 days
1915	29 days
1916	25 days
1917	26 days
1918	21 days
1922	30 days
1923	78 days
1924	21 days
1925	12 days
1927	25 days
1928	23 days
1930	31 days
1933	28 days
1934	45 days
1935	29 days
1936	22 days
1937	55 days
1938	45 days
1939	25 days
1940	46 days
1941	30 days
1942	24 days
1943	36 days
1944	24 days
1945	36 days
1946	19 days
1947	19 days
1948	41 days
1949	21 days
1950	31 days
1951	40 days
1952	8 days
1953	31 days
1954	43 days
1955	28 days
1956	35 days
1957	30 days
1958	31 days
1959	24 days
1960	19 days
1961	27 days
1962	23 days
1963	21 days
1964	16 days
1965	37 days
1966	24 days
1967	39 days
1968	20 days
1969	25 days
1970	34 days
1971	29 days
1972	31 days
1973	17 days
1974	18 days
1975	29 days
1976	22 days
1977	23 days
1978	16 days
1979	17 days
1980	54 days
1981	30 days
1982	22 days
1983	39 days
1984	19 days
1985	43 days
1986	56 days
1987	21 days
1988	33 days
1989	22 days
1990	27 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

59 years, 1904 to 1989

A day with at least 41.5 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 130.5 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Merton Weir Farm: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	41.5 mm (1.6 in)
5 years	56.2 mm (2.2 in)
10 years	68.8 mm (2.7 in)
25 years	89.0 mm (3.5 in)
50 years	107.8 mm (4.2 in)
100 years	130.5 mm (5.1 in)	Longer than the 59 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, 59 years of values from 1904 to 1989.

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: 170.2 mm (6.7 in) in 1950; 101.3 mm (4.0 in) in 1916; 95.3 mm (3.8 in) in 1941.

Download the Data

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