Coonamble (Myall Downs) Weather Records (ASN00051121)

Record envelope, standing records and threshold days for Coonamble (Myall Downs) (ASN00051121), Australia, with 52 years of record.

Key Facts for Coonamble (Myall Downs)

Coonamble (Myall Downs) (ASN00051121) is a weather station in Australia at -30.77 latitude and 148.74 longitude, 198 m (650 ft) above sea level.
The station reports from 1966 to 2017, 52 years of record.
0 records set at Coonamble (Myall Downs) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Coonamble (Myall Downs) set a daily record precipitation of 33.0 mm (1.3 in) on 18 December 2017.

About the Station

Location: Australia, -30.77 latitude, 148.74 longitude.
Elevation: 198 m (650 ft).
Period of record: 1966 to 2017, 52 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 Coonamble (Myall Downs). 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 Coonamble (Myall Downs), 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 Coonamble (Myall Downs) still stand.

Wettest Day of Each Month

Jan: 113.8 mm (4.5 in)

The wettest day on record for each calendar month at Coonamble (Myall Downs). The most was 113.8 mm (4.5 in) on 8 January 1974.

Record daily precipitation for each month at Coonamble (Myall Downs)
Month	Record daily precipitation (mm)	Date
Jan	113.8 mm (4.5 in)	8 January 1974
Feb	68.8 mm (2.7 in)	12 February 1971
Mar	81.0 mm (3.2 in)	15 March 2004
Apr	66.0 mm (2.6 in)	9 April 1990
May	69.0 mm (2.7 in)	23 May 1983
Jun	65.8 mm (2.6 in)	1 June 1981
Jul	56.8 mm (2.2 in)	21 July 1998
Aug	48.2 mm (1.9 in)	24 August 2003
Sep	59.2 mm (2.3 in)	24 September 1973
Oct	62.2 mm (2.4 in)	6 October 1983
Nov	79.2 mm (3.1 in)	26 November 2001
Dec	67.0 mm (2.6 in)	10 December 2010

Latest Records

Latest records at Coonamble (Myall Downs)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 December 2017	Coonamble (Myall Downs), AU	daily rain	33.0 mm (1.3 in)	20.8 mm (0.8 in)	18 years	26 of 100 (Routine)
20 October 2017	Coonamble (Myall Downs), AU	daily rain	26.0 mm (1.0 in)	4.7 mm (0.19 in)	44 years	22 of 100 (Routine)
9 October 2017	Coonamble (Myall Downs), AU	daily rain	51.0 mm (2.0 in)	16.4 mm (0.6 in)	27 years	28 of 100 (Routine)
14 March 2017	Coonamble (Myall Downs), AU	daily rain	12.0 mm (0.5 in)	3.8 mm (0.15 in)	32 years	16 of 100 (Routine)
1 January 2017	Coonamble (Myall Downs), AU	daily rain	26.0 mm (1.0 in)	8.8 mm (0.35 in)	18 years	14 of 100 (Routine)
17 September 2013	Coonamble (Myall Downs), AU	daily rain	27.8 mm (1.1 in)	10.0 mm (0.4 in)	27 years	22 of 100 (Routine)
28 June 2013	Coonamble (Myall Downs), AU	daily rain	20.0 mm (0.8 in)	5.6 mm (0.22 in)	32 years	18 of 100 (Routine)
2 June 2013	Coonamble (Myall Downs), AU	daily rain	19.4 mm (0.8 in)	2.8 mm (0.11 in)	28 years	14 of 100 (Routine)
23 March 2013	Coonamble (Myall Downs), AU	daily rain	25.0 mm (1.0 in)	3.9 mm (0.15 in)	42 years	19 of 100 (Routine)
1 March 2013	Coonamble (Myall Downs), AU	daily rain	49.0 mm (1.9 in)	36.8 mm (1.4 in)	14 years	36 of 100 (Notable)
18 September 2012	Coonamble (Myall Downs), AU	daily rain	6.8 mm (0.27 in)	2.8 mm (0.11 in)	30 years	15 of 100 (Routine)
13 July 2012	Coonamble (Myall Downs), AU	daily rain	10.6 mm (0.4 in)	5.4 mm (0.21 in)	7 years	11 of 100 (Routine)
11 July 2012	Coonamble (Myall Downs), AU	daily rain	22.2 mm (0.9 in)	10.4 mm (0.4 in)	8 years	17 of 100 (Routine)
25 May 2012	Coonamble (Myall Downs), AU	daily rain	27.4 mm (1.1 in)	19.8 mm (0.8 in)	12 years	23 of 100 (Routine)
5 March 2012	Coonamble (Myall Downs), AU	daily rain	29.0 mm (1.1 in)	14.6 mm (0.6 in)	18 years	20 of 100 (Routine)
2 March 2012	Coonamble (Myall Downs), AU	daily rain	34.0 mm (1.3 in)	10.6 mm (0.4 in)	35 years	22 of 100 (Routine)
3 February 2012	Coonamble (Myall Downs), AU	daily rain	57.0 mm (2.2 in)	27.0 mm (1.1 in)	34 years	32 of 100 (Routine)
22 January 2012	Coonamble (Myall Downs), AU	daily rain	36.8 mm (1.4 in)	26.8 mm (1.1 in)	16 years	22 of 100 (Routine)
23 December 2011	Coonamble (Myall Downs), AU	daily rain	31.0 mm (1.2 in)	0.3 mm (0.01 in)	42 years	16 of 100 (Routine)
30 October 2011	Coonamble (Myall Downs), AU	daily rain	8.4 mm (0.33 in)	2.4 mm (0.09 in)	5 years	7 of 100 (Routine)

Extremes by Year

1966 to 2017

Yearly extremes at Coonamble (Myall Downs): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	113.8 mm (4.5 in)	1974	52.8 mm (2.1 in)	50
Wettest five days (Rx5day)	215.4 mm (8.5 in)	1971	79.4 mm (3.1 in)	50
Longest dry spell (CDD)	86 days	1989	42 days	50

Wettest day (Rx1day)

The wettest day of the year at Coonamble (Myall Downs), 1966 to 2017. The record is 113.8 mm (4.5 in) in 1974, marked on the chart; the median year is 52.8 mm (2.1 in).

Wettest day (Rx1day) at Coonamble (Myall Downs) by year
Year	Wettest day (Rx1day)
1966	30.5 mm (1.2 in)
1967	66.3 mm (2.6 in)
1968	46.2 mm (1.8 in)
1969	46.2 mm (1.8 in)
1970	43.2 mm (1.7 in)
1971	108.5 mm (4.3 in)
1972	90.2 mm (3.6 in)
1973	61.0 mm (2.4 in)
1974	113.8 mm (4.5 in)
1975	51.8 mm (2.0 in)
1976	92.2 mm (3.6 in)
1977	57.0 mm (2.2 in)
1978	31.2 mm (1.2 in)
1979	43.4 mm (1.7 in)
1980	63.6 mm (2.5 in)
1981	65.8 mm (2.6 in)
1982	38.2 mm (1.5 in)
1983	69.0 mm (2.7 in)
1984	46.0 mm (1.8 in)
1985	27.4 mm (1.1 in)
1986	35.0 mm (1.4 in)
1987	53.8 mm (2.1 in)
1988	51.6 mm (2.0 in)
1989	42.0 mm (1.7 in)
1990	66.0 mm (2.6 in)
1991	50.8 mm (2.0 in)
1992	39.8 mm (1.6 in)
1993	56.4 mm (2.2 in)
1994	38.0 mm (1.5 in)
1995	98.0 mm (3.9 in)
1996	65.6 mm (2.6 in)
1997	42.4 mm (1.7 in)
1998	56.8 mm (2.2 in)
1999	58.0 mm (2.3 in)
2000	50.8 mm (2.0 in)
2001	79.2 mm (3.1 in)
2002	25.4 mm (1.0 in)
2003	57.0 mm (2.2 in)
2004	81.0 mm (3.2 in)
2005	59.2 mm (2.3 in)
2006	46.0 mm (1.8 in)
2007	63.4 mm (2.5 in)
2008	50.0 mm (2.0 in)
2009	62.2 mm (2.4 in)
2010	67.0 mm (2.6 in)
2011	38.2 mm (1.5 in)
2012	57.0 mm (2.2 in)
2013	49.0 mm (1.9 in)
2014	6.6 mm (0.26 in)
2017	51.0 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Coonamble (Myall Downs), 1966 to 2017. The record is 215.4 mm (8.5 in) in 1971, marked on the chart; the median year is 79.4 mm (3.1 in).

Wettest five days (Rx5day) at Coonamble (Myall Downs) by year
Year	Wettest five days (Rx5day)
1966	30.5 mm (1.2 in)
1967	91.2 mm (3.6 in)
1968	104.9 mm (4.1 in)
1969	89.9 mm (3.5 in)
1970	78.0 mm (3.1 in)
1971	215.4 mm (8.5 in)
1972	100.4 mm (4.0 in)
1973	95.2 mm (3.7 in)
1974	209.2 mm (8.2 in)
1975	80.6 mm (3.2 in)
1976	120.2 mm (4.7 in)
1977	117.0 mm (4.6 in)
1978	60.8 mm (2.4 in)
1979	56.4 mm (2.2 in)
1980	70.6 mm (2.8 in)
1981	75.0 mm (3.0 in)
1982	50.4 mm (2.0 in)
1983	118.2 mm (4.7 in)
1984	68.4 mm (2.7 in)
1985	39.4 mm (1.6 in)
1986	47.8 mm (1.9 in)
1987	55.4 mm (2.2 in)
1988	55.2 mm (2.2 in)
1989	53.4 mm (2.1 in)
1990	128.6 mm (5.1 in)
1991	96.6 mm (3.8 in)
1992	70.0 mm (2.8 in)
1993	64.0 mm (2.5 in)
1994	67.8 mm (2.7 in)
1995	135.6 mm (5.3 in)
1996	82.0 mm (3.2 in)
1997	75.2 mm (3.0 in)
1998	92.4 mm (3.6 in)
1999	78.2 mm (3.1 in)
2000	106.6 mm (4.2 in)
2001	113.4 mm (4.5 in)
2002	34.4 mm (1.4 in)
2003	60.8 mm (2.4 in)
2004	100.4 mm (4.0 in)
2005	88.0 mm (3.5 in)
2006	57.8 mm (2.3 in)
2007	93.0 mm (3.7 in)
2008	87.6 mm (3.4 in)
2009	168.4 mm (6.6 in)
2010	116.2 mm (4.6 in)
2011	55.8 mm (2.2 in)
2012	95.4 mm (3.8 in)
2013	53.4 mm (2.1 in)
2014	6.8 mm (0.27 in)
2017	52.5 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Coonamble (Myall Downs), 1966 to 2017. The record is 86 days in 1989, marked on the chart; the median year is 42 days.

Longest dry spell (CDD) at Coonamble (Myall Downs) by year
Year	Longest dry spell (CDD)
1966	11 days
1967	57 days
1968	63 days
1969	26 days
1970	49 days
1971	40 days
1972	42 days
1973	34 days
1974	43 days
1975	62 days
1976	30 days
1977	42 days
1978	39 days
1979	31 days
1980	46 days
1981	47 days
1982	64 days
1983	28 days
1984	73 days
1985	31 days
1986	82 days
1987	35 days
1988	48 days
1989	86 days
1990	33 days
1991	50 days
1992	63 days
1993	41 days
1994	55 days
1995	75 days
1996	78 days
1997	61 days
1998	62 days
1999	36 days
2000	37 days
2001	36 days
2002	54 days
2003	38 days
2004	36 days
2005	54 days
2006	46 days
2007	36 days
2008	25 days
2009	42 days
2010	28 days
2011	30 days
2012	36 days
2013	51 days
2014	20 days
2017	38 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

47 years, 1967 to 2013

A day with at least 53.9 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 121.9 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Coonamble (Myall Downs): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	53.9 mm (2.1 in)
5 years	71.2 mm (2.8 in)
10 years	83.1 mm (3.3 in)
25 years	98.4 mm (3.9 in)
50 years	110.0 mm (4.3 in)	Longer than the 47 years of record
100 years	121.9 mm (4.8 in)	Longer than the 47 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, 47 years of values from 1967 to 2013.

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: 113.8 mm (4.5 in) in 1974; 108.5 mm (4.3 in) in 1971; 98.0 mm (3.9 in) in 1995.

Download the Data

Data for Coonamble (Myall Downs) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Coonamble (Myall Downs) 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