Siam Weather Records (ASN00018186)

Record envelope, standing records and threshold days for Siam (ASN00018186), Australia, with 118 years of record.

Key Facts for Siam

Siam (ASN00018186) is a weather station in Australia at -32.55 latitude and 136.71 longitude, 177 m (581 ft) above sea level.
The station reports from 1907 to 2024, 118 years of record.
0 records set at Siam still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Siam set a daily record precipitation of 22.0 mm (0.9 in) on 7 September 2022.

About the Station

Location: Australia, -32.55 latitude, 136.71 longitude.
Elevation: 177 m (581 ft).
Period of record: 1907 to 2024, 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 Siam. 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 Siam, 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 Siam still stand.

Wettest Day of Each Month

Mar: 96.0 mm (3.8 in)

The wettest day on record for each calendar month at Siam. The most was 96.0 mm (3.8 in) on 1 March 1921.

Record daily precipitation for each month at Siam
Month	Record daily precipitation (mm)	Date
Jan	77.0 mm (3.0 in)	21 January 2022
Feb	89.2 mm (3.5 in)	20 February 1938
Mar	96.0 mm (3.8 in)	1 March 1921
Apr	44.5 mm (1.8 in)	24 April 1954
May	62.5 mm (2.5 in)	25 May 1910
Jun	41.4 mm (1.6 in)	10 June 1931
Jul	44.7 mm (1.8 in)	11 July 1956
Aug	46.0 mm (1.8 in)	21 August 1908
Sep	38.1 mm (1.5 in)	16 September 1917
Oct	52.1 mm (2.1 in)	22 October 1916
Nov	88.0 mm (3.5 in)	11 November 1998
Dec	35.3 mm (1.4 in)	26 December 1929

Latest Records

Latest records at Siam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 September 2022	Siam, AU	daily rain	22.0 mm (0.9 in)	0.7 mm (0.03 in)	61 years	20 of 100 (Routine)
6 September 2022	Siam, AU	daily rain	8.0 mm (0.31 in)	0.6 mm (0.02 in)	101 years	20 of 100 (Routine)
2 August 2022	Siam, AU	daily rain	10.0 mm (0.4 in)	1.9 mm (0.07 in)	85 years	20 of 100 (Routine)
29 May 2022	Siam, AU	daily rain	10.0 mm (0.4 in)	0.3 mm (0.01 in)	59 years	20 of 100 (Routine)
18 April 2022	Siam, AU	daily rain	11.0 mm (0.4 in)	3.0 mm (0.12 in)	16 years	18 of 100 (Routine)
23 January 2022	Siam, AU	daily rain	31.6 mm (1.2 in)	31.6 mm (1.2 in)	114 years	69 of 100 (Major)
22 January 2022	Siam, AU	daily rain	47.0 mm (1.9 in)	26.0 mm (1.0 in)	24 years	41 of 100 (Notable)
21 January 2022	Siam, AU	monthly rain	77.0 mm (3.0 in)	19.3 mm (0.8 in)	80 years	62 of 100 (Major)
19 November 2021	Siam, AU	daily rain	14.6 mm (0.6 in)	5.6 mm (0.22 in)	28 years	20 of 100 (Routine)
10 November 2021	Siam, AU	daily rain	14.0 mm (0.6 in)	6.4 mm (0.25 in)	72 years	20 of 100 (Routine)
30 September 2020	Siam, AU	daily rain	8.0 mm (0.31 in)	3.0 mm (0.12 in)	24 years	20 of 100 (Routine)
23 April 2020	Siam, AU	daily rain	13.0 mm (0.5 in)	7.6 mm (0.30 in)	11 years	20 of 100 (Routine)
3 March 2020	Siam, AU	daily rain	6.0 mm (0.24 in)	4.7 mm (0.19 in)	63 years	20 of 100 (Routine)
1 February 2020	Siam, AU	daily rain	76.6 mm (3.0 in)	45.6 mm (1.8 in)	45 years	52 of 100 (Notable)
21 September 2019	Siam, AU	daily rain	13.0 mm (0.5 in)	7.4 mm (0.29 in)	64 years	20 of 100 (Routine)
12 June 2019	Siam, AU	daily rain	34.0 mm (1.3 in)	7.3 mm (0.29 in)	76 years	44 of 100 (Notable)
28 October 2018	Siam, AU	daily rain	17.2 mm (0.7 in)	12.2 mm (0.5 in)	25 years	20 of 100 (Routine)
8 June 2018	Siam, AU	daily rain	11.2 mm (0.4 in)	0.5 mm (0.02 in)	47 years	20 of 100 (Routine)
19 December 2017	Siam, AU	daily rain	10.1 mm (0.4 in)	6.3 mm (0.25 in)	76 years	20 of 100 (Routine)
23 November 2017	Siam, AU	daily rain	17.0 mm (0.7 in)	7.0 mm (0.28 in)	16 years	20 of 100 (Routine)

Extremes by Year

1907 to 2024

Yearly extremes at Siam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	96.0 mm (3.8 in)	1921	25.4 mm (1.0 in)	118
Wettest five days (Rx5day)	159.7 mm (6.3 in)	1946	35.7 mm (1.4 in)	118
Longest dry spell (CDD)	126 days	1965	53 days	118

Wettest day (Rx1day)

The wettest day of the year at Siam, 1907 to 2024. The record is 96.0 mm (3.8 in) in 1921, marked on the chart; the median year is 25.4 mm (1.0 in).

Wettest day (Rx1day) at Siam by year
Year	Wettest day (Rx1day)
1907	34.3 mm (1.4 in)
1908	51.3 mm (2.0 in)
1909	31.8 mm (1.3 in)
1910	62.5 mm (2.5 in)
1911	35.6 mm (1.4 in)
1912	31.8 mm (1.3 in)
1913	22.1 mm (0.9 in)
1914	18.8 mm (0.7 in)
1915	26.7 mm (1.1 in)
1916	52.1 mm (2.1 in)
1917	66.3 mm (2.6 in)
1918	40.6 mm (1.6 in)
1919	33.0 mm (1.3 in)
1920	35.6 mm (1.4 in)
1921	96.0 mm (3.8 in)
1922	20.3 mm (0.8 in)
1923	22.9 mm (0.9 in)
1924	19.1 mm (0.8 in)
1925	28.7 mm (1.1 in)
1926	25.1 mm (1.0 in)
1927	20.3 mm (0.8 in)
1928	30.5 mm (1.2 in)
1929	35.3 mm (1.4 in)
1930	31.0 mm (1.2 in)
1931	41.4 mm (1.6 in)
1932	24.1 mm (0.9 in)
1933	43.7 mm (1.7 in)
1934	24.4 mm (1.0 in)
1935	20.3 mm (0.8 in)
1936	19.1 mm (0.8 in)
1937	24.6 mm (1.0 in)
1938	89.2 mm (3.5 in)
1939	19.1 mm (0.8 in)
1940	19.1 mm (0.8 in)
1941	57.7 mm (2.3 in)
1942	27.7 mm (1.1 in)
1943	21.3 mm (0.8 in)
1944	58.4 mm (2.3 in)
1945	26.7 mm (1.1 in)
1946	87.6 mm (3.4 in)
1947	53.1 mm (2.1 in)
1948	9.7 mm (0.38 in)
1949	32.3 mm (1.3 in)
1950	26.2 mm (1.0 in)
1951	24.9 mm (1.0 in)
1952	22.9 mm (0.9 in)
1953	38.1 mm (1.5 in)
1954	44.5 mm (1.8 in)
1955	25.7 mm (1.0 in)
1956	44.7 mm (1.8 in)
1957	32.5 mm (1.3 in)
1958	47.8 mm (1.9 in)
1959	12.7 mm (0.5 in)
1960	24.9 mm (1.0 in)
1961	23.9 mm (0.9 in)
1962	22.9 mm (0.9 in)
1963	35.6 mm (1.4 in)
1964	31.5 mm (1.2 in)
1965	26.7 mm (1.1 in)
1966	32.0 mm (1.3 in)
1967	35.8 mm (1.4 in)
1968	33.5 mm (1.3 in)
1969	29.2 mm (1.1 in)
1970	11.7 mm (0.5 in)
1971	15.5 mm (0.6 in)
1972	56.1 mm (2.2 in)
1973	81.3 mm (3.2 in)
1974	31.0 mm (1.2 in)
1975	18.4 mm (0.7 in)
1976	11.6 mm (0.5 in)
1977	0.0 mm (0.00 in)
1978	0.0 mm (0.00 in)
1979	39.0 mm (1.5 in)
1980	0.0 mm (0.00 in)
1981	0.0 mm (0.00 in)
1982	19.0 mm (0.7 in)
1983	0.0 mm (0.00 in)
1984	21.4 mm (0.8 in)
1985	21.2 mm (0.8 in)
1986	21.0 mm (0.8 in)
1987	19.0 mm (0.7 in)
1988	17.0 mm (0.7 in)
1989	28.6 mm (1.1 in)
1990	21.0 mm (0.8 in)
1991	19.4 mm (0.8 in)
1992	52.6 mm (2.1 in)
1993	28.0 mm (1.1 in)
1994	18.0 mm (0.7 in)
1995	14.0 mm (0.6 in)
1996	13.0 mm (0.5 in)
1997	37.0 mm (1.5 in)
1998	88.0 mm (3.5 in)
1999	25.0 mm (1.0 in)
2000	21.0 mm (0.8 in)
2001	35.0 mm (1.4 in)
2002	7.6 mm (0.30 in)
2003	13.0 mm (0.5 in)
2004	18.2 mm (0.7 in)
2005	42.0 mm (1.7 in)
2006	26.0 mm (1.0 in)
2007	54.0 mm (2.1 in)
2008	16.8 mm (0.7 in)
2009	37.0 mm (1.5 in)
2010	22.2 mm (0.9 in)
2011	20.0 mm (0.8 in)
2012	20.0 mm (0.8 in)
2013	9.0 mm (0.35 in)
2014	18.0 mm (0.7 in)
2015	3.0 mm (0.12 in)
2016	29.0 mm (1.1 in)
2017	17.0 mm (0.7 in)
2018	17.2 mm (0.7 in)
2019	34.0 mm (1.3 in)
2020	76.6 mm (3.0 in)
2021	14.6 mm (0.6 in)
2022	77.0 mm (3.0 in)
2023	18.0 mm (0.7 in)
2024	2.0 mm (0.08 in)

Wettest five days (Rx5day)

The wettest five days of the year at Siam, 1907 to 2024. The record is 159.7 mm (6.3 in) in 1946, marked on the chart; the median year is 35.7 mm (1.4 in).

Wettest five days (Rx5day) at Siam by year
Year	Wettest five days (Rx5day)
1907	34.3 mm (1.4 in)
1908	68.6 mm (2.7 in)
1909	31.8 mm (1.3 in)
1910	106.4 mm (4.2 in)
1911	49.6 mm (2.0 in)
1912	63.6 mm (2.5 in)
1913	35.6 mm (1.4 in)
1914	18.8 mm (0.7 in)
1915	32.6 mm (1.3 in)
1916	59.7 mm (2.4 in)
1917	74.9 mm (2.9 in)
1918	45.7 mm (1.8 in)
1919	54.6 mm (2.1 in)
1920	40.6 mm (1.6 in)
1921	96.0 mm (3.8 in)
1922	20.3 mm (0.8 in)
1923	30.5 mm (1.2 in)
1924	19.1 mm (0.8 in)
1925	28.7 mm (1.1 in)
1926	42.6 mm (1.7 in)
1927	21.1 mm (0.8 in)
1928	30.5 mm (1.2 in)
1929	37.1 mm (1.5 in)
1930	38.6 mm (1.5 in)
1931	41.4 mm (1.6 in)
1932	24.1 mm (0.9 in)
1933	52.1 mm (2.1 in)
1934	28.5 mm (1.1 in)
1935	43.1 mm (1.7 in)
1936	22.1 mm (0.9 in)
1937	36.5 mm (1.4 in)
1938	115.9 mm (4.6 in)
1939	27.8 mm (1.1 in)
1940	19.1 mm (0.8 in)
1941	68.6 mm (2.7 in)
1942	36.1 mm (1.4 in)
1943	21.3 mm (0.8 in)
1944	65.0 mm (2.6 in)
1945	33.3 mm (1.3 in)
1946	159.7 mm (6.3 in)
1947	73.9 mm (2.9 in)
1948	15.5 mm (0.6 in)
1949	42.5 mm (1.7 in)
1950	35.8 mm (1.4 in)
1951	39.7 mm (1.6 in)
1952	30.0 mm (1.2 in)
1953	40.4 mm (1.6 in)
1954	47.8 mm (1.9 in)
1955	34.3 mm (1.4 in)
1956	55.4 mm (2.2 in)
1957	53.9 mm (2.1 in)
1958	53.9 mm (2.1 in)
1959	17.8 mm (0.7 in)
1960	37.4 mm (1.5 in)
1961	34.8 mm (1.4 in)
1962	29.5 mm (1.2 in)
1963	57.9 mm (2.3 in)
1964	45.2 mm (1.8 in)
1965	44.3 mm (1.7 in)
1966	95.7 mm (3.8 in)
1967	40.6 mm (1.6 in)
1968	56.6 mm (2.2 in)
1969	34.3 mm (1.4 in)
1970	12.5 mm (0.5 in)
1971	24.6 mm (1.0 in)
1972	75.4 mm (3.0 in)
1973	128.3 mm (5.1 in)
1974	72.3 mm (2.8 in)
1975	27.0 mm (1.1 in)
1976	11.6 mm (0.5 in)
1977	0.0 mm (0.00 in)
1978	0.0 mm (0.00 in)
1979	66.4 mm (2.6 in)
1980	0.0 mm (0.00 in)
1981	0.0 mm (0.00 in)
1982	22.0 mm (0.9 in)
1983	0.0 mm (0.00 in)
1984	27.2 mm (1.1 in)
1985	36.8 mm (1.4 in)
1986	36.0 mm (1.4 in)
1987	32.0 mm (1.3 in)
1988	31.0 mm (1.2 in)
1989	45.6 mm (1.8 in)
1990	24.0 mm (0.9 in)
1991	37.8 mm (1.5 in)
1992	71.8 mm (2.8 in)
1993	39.3 mm (1.5 in)
1994	38.0 mm (1.5 in)
1995	20.5 mm (0.8 in)
1996	29.2 mm (1.1 in)
1997	55.4 mm (2.2 in)
1998	95.2 mm (3.7 in)
1999	31.3 mm (1.2 in)
2000	22.2 mm (0.9 in)
2001	36.8 mm (1.4 in)
2002	14.8 mm (0.6 in)
2003	26.2 mm (1.0 in)
2004	20.8 mm (0.8 in)
2005	45.0 mm (1.8 in)
2006	26.0 mm (1.0 in)
2007	131.0 mm (5.2 in)
2008	23.6 mm (0.9 in)
2009	62.6 mm (2.5 in)
2010	27.8 mm (1.1 in)
2011	24.4 mm (1.0 in)
2012	25.3 mm (1.0 in)
2013	11.0 mm (0.4 in)
2014	18.0 mm (0.7 in)
2015	3.0 mm (0.12 in)
2016	29.0 mm (1.1 in)
2017	20.6 mm (0.8 in)
2018	19.0 mm (0.7 in)
2019	38.4 mm (1.5 in)
2020	83.4 mm (3.3 in)
2021	36.0 mm (1.4 in)
2022	156.2 mm (6.1 in)
2023	20.0 mm (0.8 in)
2024	2.0 mm (0.08 in)

Longest dry spell (CDD)

The longest dry spell of the year at Siam, 1907 to 2024. The record is 126 days in 1965, marked on the chart; the median year is 53 days.

Longest dry spell (CDD) at Siam by year
Year	Longest dry spell (CDD)
1907	40 days
1908	75 days
1909	45 days
1910	68 days
1911	90 days
1912	92 days
1913	64 days
1914	71 days
1915	78 days
1916	81 days
1917	45 days
1918	61 days
1919	41 days
1920	49 days
1921	43 days
1922	50 days
1923	101 days
1924	68 days
1925	62 days
1926	55 days
1927	121 days
1928	78 days
1929	72 days
1930	57 days
1931	96 days
1932	45 days
1933	46 days
1934	56 days
1935	63 days
1936	78 days
1937	51 days
1938	114 days
1939	41 days
1940	42 days
1941	34 days
1942	58 days
1943	59 days
1944	55 days
1945	80 days
1946	60 days
1947	77 days
1948	98 days
1949	61 days
1950	60 days
1951	64 days
1952	53 days
1953	100 days
1954	67 days
1955	35 days
1956	43 days
1957	52 days
1958	49 days
1959	48 days
1960	44 days
1961	51 days
1962	53 days
1963	49 days
1964	37 days
1965	126 days
1966	36 days
1967	70 days
1968	28 days
1969	79 days
1970	76 days
1971	58 days
1972	67 days
1973	50 days
1974	35 days
1975	50 days
1976	38 days
1977	30 days
1978	31 days
1979	31 days
1980	31 days
1981	30 days
1982	67 days
1983	31 days
1984	39 days
1985	43 days
1986	75 days
1987	57 days
1988	87 days
1989	66 days
1990	29 days
1991	80 days
1992	26 days
1993	48 days
1994	92 days
1995	34 days
1996	50 days
1997	84 days
1998	34 days
1999	60 days
2000	28 days
2001	25 days
2002	77 days
2003	35 days
2004	65 days
2005	34 days
2006	111 days
2007	52 days
2008	62 days
2009	59 days
2010	32 days
2011	41 days
2012	39 days
2013	74 days
2014	51 days
2015	24 days
2016	44 days
2017	24 days
2018	74 days
2019	55 days
2020	30 days
2021	41 days
2022	57 days
2023	25 days
2024	15 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

94 years, 1908 to 2019

A day with at least 27.8 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 105.7 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Siam: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	27.8 mm (1.1 in)
5 years	42.0 mm (1.7 in)
10 years	53.7 mm (2.1 in)
25 years	71.5 mm (2.8 in)
50 years	87.3 mm (3.4 in)
100 years	105.7 mm (4.2 in)	Longer than the 94 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, 94 years of values from 1908 to 2019.

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: 96.0 mm (3.8 in) in 1921; 89.2 mm (3.5 in) in 1938; 88.0 mm (3.5 in) in 1998.

Download the Data

Data for Siam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Siam 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 2026-10-16 (16 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