Somerton (Girraweena) Weather Records (ASN00055011)

Record envelope, standing records and threshold days for Somerton (Girraweena) (ASN00055011), Australia, with 66 years of record.

Key Facts for Somerton (Girraweena)

Somerton (Girraweena) (ASN00055011) is a weather station in Australia at -30.91 latitude and 150.66 longitude, 380 m (1,247 ft) above sea level.
The station reports from 1936 to 2001, 66 years of record.
0 records set at Somerton (Girraweena) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Somerton (Girraweena) set a daily record precipitation of 36.0 mm (1.4 in) on 31 January 2001.

About the Station

Location: Australia, -30.91 latitude, 150.66 longitude.
Elevation: 380 m (1,247 ft).
Period of record: 1936 to 2001, 66 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 Somerton (Girraweena). 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 Somerton (Girraweena), 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 Somerton (Girraweena) still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Somerton (Girraweena) between 8 January 1974 and 8 January 1974. Each dot is a new record.

Wettest Day of Each Month

Jan: 118.0 mm (4.6 in)

The wettest day on record for each calendar month at Somerton (Girraweena). The most was 118.0 mm (4.6 in) on 8 January 1974.

Record daily precipitation for each month at Somerton (Girraweena)
Month	Record daily precipitation (mm)	Date
Jan	118.0 mm (4.6 in)	8 January 1974
Feb	111.0 mm (4.4 in)	25 February 1955
Mar	85.1 mm (3.4 in)	9 March 1941
Apr	80.0 mm (3.1 in)	7 April 1977
May	62.6 mm (2.5 in)	31 May 1978
Jun	71.6 mm (2.8 in)	2 June 1993
Jul	57.8 mm (2.3 in)	17 July 1986
Aug	58.4 mm (2.3 in)	26 August 1949
Sep	70.8 mm (2.8 in)	5 September 1998
Oct	74.4 mm (2.9 in)	20 October 1962
Nov	69.9 mm (2.8 in)	22 November 1950
Dec	77.1 mm (3.0 in)	7 December 1996

Latest Records

Latest records at Somerton (Girraweena)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 January 2001	Somerton (Girraweena), AU	daily rain	36.0 mm (1.4 in)	9.0 mm (0.35 in)	4 years	12 of 100 (Routine)
19 November 2000	Somerton (Girraweena), AU	daily rain	25.2 mm (1.0 in)	1.3 mm (0.05 in)	40 years	19 of 100 (Routine)
17 October 2000	Somerton (Girraweena), AU	daily rain	63.0 mm (2.5 in)	25.8 mm (1.0 in)	13 years	35 of 100 (Notable)
14 October 2000	Somerton (Girraweena), AU	daily rain	44.6 mm (1.8 in)	16.2 mm (0.6 in)	33 years	31 of 100 (Routine)
14 August 2000	Somerton (Girraweena), AU	daily rain	18.2 mm (0.7 in)	8.5 mm (0.33 in)	32 years	20 of 100 (Routine)
26 July 2000	Somerton (Girraweena), AU	daily rain	23.2 mm (0.9 in)	5.9 mm (0.23 in)	64 years	20 of 100 (Routine)
17 April 2000	Somerton (Girraweena), AU	daily rain	12.6 mm (0.5 in)	5.7 mm (0.22 in)	40 years	20 of 100 (Routine)
22 March 2000	Somerton (Girraweena), AU	daily rain	27.0 mm (1.1 in)	13.3 mm (0.5 in)	48 years	29 of 100 (Routine)
1 November 1999	Somerton (Girraweena), AU	daily rain	26.0 mm (1.0 in)	1.1 mm (0.04 in)	58 years	24 of 100 (Routine)
4 October 1999	Somerton (Girraweena), AU	daily rain	18.4 mm (0.7 in)	4.4 mm (0.17 in)	24 years	17 of 100 (Routine)
3 October 1999	Somerton (Girraweena), AU	daily rain	14.2 mm (0.6 in)	0.5 mm (0.02 in)	48 years	20 of 100 (Routine)
17 September 1999	Somerton (Girraweena), AU	daily rain	21.2 mm (0.8 in)	9.3 mm (0.37 in)	48 years	20 of 100 (Routine)
1 July 1999	Somerton (Girraweena), AU	daily rain	28.8 mm (1.1 in)	16.4 mm (0.6 in)	37 years	35 of 100 (Notable)
10 June 1999	Somerton (Girraweena), AU	daily rain	41.0 mm (1.6 in)	29.3 mm (1.2 in)	42 years	52 of 100 (Notable)
6 April 1999	Somerton (Girraweena), AU	daily rain	34.2 mm (1.3 in)	26.1 mm (1.0 in)	60 years	46 of 100 (Notable)
2 April 1999	Somerton (Girraweena), AU	daily rain	40.2 mm (1.6 in)	16.4 mm (0.6 in)	9 years	22 of 100 (Routine)
7 October 1998	Somerton (Girraweena), AU	daily rain	25.2 mm (1.0 in)	0.8 mm (0.03 in)	1 year	6 of 100 (Routine)
25 September 1998	Somerton (Girraweena), AU	daily rain	26.2 mm (1.0 in)	6.6 mm (0.26 in)	49 years	29 of 100 (Routine)
15 September 1998	Somerton (Girraweena), AU	daily rain	16.8 mm (0.7 in)	1.6 mm (0.06 in)	37 years	19 of 100 (Routine)
6 September 1998	Somerton (Girraweena), AU	daily rain	20.8 mm (0.8 in)	9.9 mm (0.39 in)	55 years	20 of 100 (Routine)

Extremes by Year

1936 to 2001

Yearly extremes at Somerton (Girraweena): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	118.0 mm (4.6 in)	1974	56.6 mm (2.2 in)	59
Wettest five days (Rx5day)	266.7 mm (10.5 in)	1955	85.1 mm (3.4 in)	59
Longest dry spell (CDD)	58 days	1942	36 days	59

Wettest day (Rx1day)

The wettest day of the year at Somerton (Girraweena), 1936 to 2001. The record is 118.0 mm (4.6 in) in 1974, marked on the chart; the median year is 56.6 mm (2.2 in).

Wettest day (Rx1day) at Somerton (Girraweena) by year
Year	Wettest day (Rx1day)
1936	43.4 mm (1.7 in)
1937	71.1 mm (2.8 in)
1938	42.4 mm (1.7 in)
1939	50.3 mm (2.0 in)
1940	39.4 mm (1.6 in)
1941	85.1 mm (3.4 in)
1942	56.6 mm (2.2 in)
1943	58.4 mm (2.3 in)
1944	46.7 mm (1.8 in)
1945	34.8 mm (1.4 in)
1946	27.2 mm (1.1 in)
1947	64.8 mm (2.6 in)
1948	76.5 mm (3.0 in)
1949	60.7 mm (2.4 in)
1950	79.2 mm (3.1 in)
1951	35.1 mm (1.4 in)
1952	56.9 mm (2.2 in)
1953	47.0 mm (1.9 in)
1954	52.6 mm (2.1 in)
1955	111.0 mm (4.4 in)
1956	48.0 mm (1.9 in)
1957	54.4 mm (2.1 in)
1958	56.4 mm (2.2 in)
1959	77.2 mm (3.0 in)
1960	53.3 mm (2.1 in)
1961	41.1 mm (1.6 in)
1962	74.4 mm (2.9 in)
1963	43.7 mm (1.7 in)
1964	114.3 mm (4.5 in)
1965	22.6 mm (0.9 in)
1966	27.7 mm (1.1 in)
1967	70.6 mm (2.8 in)
1968	84.8 mm (3.3 in)
1969	52.8 mm (2.1 in)
1970	56.6 mm (2.2 in)
1971	71.4 mm (2.8 in)
1972	31.2 mm (1.2 in)
1973	71.1 mm (2.8 in)
1974	118.0 mm (4.6 in)
1975	65.0 mm (2.6 in)
1976	87.2 mm (3.4 in)
1977	80.0 mm (3.1 in)
1978	62.6 mm (2.5 in)
1986	57.8 mm (2.3 in)
1987	59.0 mm (2.3 in)
1988	54.0 mm (2.1 in)
1989	58.6 mm (2.3 in)
1990	48.0 mm (1.9 in)
1991	65.2 mm (2.6 in)
1992	49.2 mm (1.9 in)
1993	71.6 mm (2.8 in)
1994	40.4 mm (1.6 in)
1995	36.4 mm (1.4 in)
1996	77.1 mm (3.0 in)
1997	50.2 mm (2.0 in)
1998	70.8 mm (2.8 in)
1999	41.0 mm (1.6 in)
2000	63.0 mm (2.5 in)
2001	36.0 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Somerton (Girraweena), 1936 to 2001. The record is 266.7 mm (10.5 in) in 1955, marked on the chart; the median year is 85.1 mm (3.4 in).

Wettest five days (Rx5day) at Somerton (Girraweena) by year
Year	Wettest five days (Rx5day)
1936	79.0 mm (3.1 in)
1937	80.8 mm (3.2 in)
1938	54.3 mm (2.1 in)
1939	96.5 mm (3.8 in)
1940	45.8 mm (1.8 in)
1941	103.4 mm (4.1 in)
1942	111.2 mm (4.4 in)
1943	70.8 mm (2.8 in)
1944	70.3 mm (2.8 in)
1945	66.1 mm (2.6 in)
1946	39.9 mm (1.6 in)
1947	96.5 mm (3.8 in)
1948	80.6 mm (3.2 in)
1949	93.0 mm (3.7 in)
1950	107.5 mm (4.2 in)
1951	36.6 mm (1.4 in)
1952	104.9 mm (4.1 in)
1953	110.0 mm (4.3 in)
1954	80.8 mm (3.2 in)
1955	266.7 mm (10.5 in)
1956	111.0 mm (4.4 in)
1957	74.2 mm (2.9 in)
1958	64.6 mm (2.5 in)
1959	132.1 mm (5.2 in)
1960	97.0 mm (3.8 in)
1961	92.9 mm (3.7 in)
1962	98.0 mm (3.9 in)
1963	72.7 mm (2.9 in)
1964	160.5 mm (6.3 in)
1965	61.2 mm (2.4 in)
1966	31.0 mm (1.2 in)
1967	75.9 mm (3.0 in)
1968	120.3 mm (4.7 in)
1969	77.7 mm (3.1 in)
1970	85.1 mm (3.4 in)
1971	127.0 mm (5.0 in)
1972	72.9 mm (2.9 in)
1973	89.7 mm (3.5 in)
1974	155.4 mm (6.1 in)
1975	71.4 mm (2.8 in)
1976	166.2 mm (6.5 in)
1977	138.6 mm (5.5 in)
1978	112.6 mm (4.4 in)
1986	65.8 mm (2.6 in)
1987	77.6 mm (3.1 in)
1988	86.0 mm (3.4 in)
1989	73.8 mm (2.9 in)
1990	82.4 mm (3.2 in)
1991	84.6 mm (3.3 in)
1992	73.6 mm (2.9 in)
1993	91.6 mm (3.6 in)
1994	53.6 mm (2.1 in)
1995	64.0 mm (2.5 in)
1996	101.1 mm (4.0 in)
1997	93.5 mm (3.7 in)
1998	94.0 mm (3.7 in)
1999	93.0 mm (3.7 in)
2000	117.2 mm (4.6 in)
2001	65.2 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Somerton (Girraweena), 1936 to 2001. The record is 58 days in 1942, marked on the chart; the median year is 36 days.

Longest dry spell (CDD) at Somerton (Girraweena) by year
Year	Longest dry spell (CDD)
1936	33 days
1937	42 days
1938	35 days
1939	34 days
1940	54 days
1941	45 days
1942	58 days
1943	51 days
1944	41 days
1945	25 days
1946	43 days
1947	32 days
1948	23 days
1949	29 days
1950	27 days
1951	28 days
1952	30 days
1953	34 days
1954	38 days
1955	36 days
1956	21 days
1957	41 days
1958	34 days
1959	48 days
1960	35 days
1961	32 days
1962	36 days
1963	23 days
1964	38 days
1965	39 days
1966	37 days
1967	34 days
1968	25 days
1969	22 days
1970	37 days
1971	38 days
1972	43 days
1973	20 days
1974	46 days
1975	58 days
1976	41 days
1977	43 days
1978	37 days
1986	30 days
1987	33 days
1988	21 days
1989	30 days
1990	25 days
1991	36 days
1992	33 days
1993	41 days
1994	38 days
1995	58 days
1996	47 days
1997	38 days
1998	51 days
1999	32 days
2000	30 days
2001	30 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

56 years, 1937 to 2000

A day with at least 57.7 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 118.0 mm (4.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Somerton (Girraweena): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	57.7 mm (2.3 in)
5 years	75.7 mm (3.0 in)
10 years	86.8 mm (3.4 in)
25 years	100.0 mm (3.9 in)
50 years	109.2 mm (4.3 in)
100 years	118.0 mm (4.6 in)	Longer than the 56 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, 56 years of values from 1937 to 2000.

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: 118.0 mm (4.6 in) in 1974; 114.3 mm (4.5 in) in 1964; 111.0 mm (4.4 in) in 1955.

Download the Data

Data for Somerton (Girraweena) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Somerton (Girraweena) 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 2026-10-14 (14 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