Thornleigh Weather Records (ASN00036081)

Record envelope, standing records and threshold days for Thornleigh (ASN00036081), Australia, with 99 years of record.

Key Facts for Thornleigh

Thornleigh (ASN00036081) is a weather station in Australia at -24.32 latitude and 144.91 longitude, 240 m (787 ft) above sea level.
The station reports from 1922 to 2020, 99 years of record.
0 records set at Thornleigh still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Thornleigh set a daily record precipitation of 64.0 mm (2.5 in) on 23 February 2020.

About the Station

Location: Australia, -24.32 latitude, 144.91 longitude.
Elevation: 240 m (787 ft).
Period of record: 1922 to 2020, 99 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 Thornleigh. 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 Thornleigh, 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 Thornleigh still stand.

Wettest Day of Each Month

Dec: 146.6 mm (5.8 in)

The wettest day on record for each calendar month at Thornleigh. The most was 146.6 mm (5.8 in) on 9 December 1993.

Record daily precipitation for each month at Thornleigh
Month	Record daily precipitation (mm)	Date
Jan	90.0 mm (3.5 in)	30 January 1984
Feb	97.8 mm (3.9 in)	19 February 1973
Mar	71.2 mm (2.8 in)	6 March 1980
Apr	129.5 mm (5.1 in)	3 April 1999
May	122.0 mm (4.8 in)	22 May 1990
Jun	51.4 mm (2.0 in)	1 June 1981
Jul	81.2 mm (3.2 in)	10 July 1978
Aug	29.8 mm (1.2 in)	14 August 1986
Sep	45.0 mm (1.8 in)	29 September 1996
Oct	66.0 mm (2.6 in)	15 October 2010
Nov	69.0 mm (2.7 in)	21 November 1999
Dec	146.6 mm (5.8 in)	9 December 1993

Latest Records

Latest records at Thornleigh
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 February 2020	Thornleigh, AU	daily rain	64.0 mm (2.5 in)	56.0 mm (2.2 in)	16 years	45 of 100 (Notable)
24 January 2020	Thornleigh, AU	daily rain	38.0 mm (1.5 in)	26.0 mm (1.0 in)	10 years	27 of 100 (Routine)
17 January 2020	Thornleigh, AU	daily rain	43.0 mm (1.7 in)	32.8 mm (1.3 in)	42 years	41 of 100 (Notable)
4 November 2019	Thornleigh, AU	daily rain	21.0 mm (0.8 in)	8.0 mm (0.31 in)	40 years	20 of 100 (Routine)
31 October 2019	Thornleigh, AU	daily rain	53.0 mm (2.1 in)	38.8 mm (1.5 in)	42 years	56 of 100 (Notable)
2 November 2015	Thornleigh, AU	daily rain	19.0 mm (0.7 in)	6.6 mm (0.26 in)	40 years	20 of 100 (Routine)
1 November 2015	Thornleigh, AU	daily rain	48.0 mm (1.9 in)	25.8 mm (1.0 in)	36 years	40 of 100 (Notable)
21 September 2014	Thornleigh, AU	daily rain	16.0 mm (0.6 in)	14.0 mm (0.6 in)	44 years	20 of 100 (Routine)
13 June 2014	Thornleigh, AU	daily rain	11.0 mm (0.4 in)	8.0 mm (0.31 in)	8 years	17 of 100 (Routine)
23 November 2013	Thornleigh, AU	daily rain	17.0 mm (0.7 in)	17.0 mm (0.7 in)	58 years	20 of 100 (Routine)
7 March 2013	Thornleigh, AU	daily rain	20.0 mm (0.8 in)	9.0 mm (0.35 in)	6 years	15 of 100 (Routine)
18 March 2011	Thornleigh, AU	daily rain	63.0 mm (2.5 in)	39.6 mm (1.6 in)	21 years	40 of 100 (Notable)
19 December 2010	Thornleigh, AU	daily rain	28.0 mm (1.1 in)	19.9 mm (0.8 in)	36 years	29 of 100 (Routine)
11 December 2010	Thornleigh, AU	daily rain	39.0 mm (1.5 in)	33.6 mm (1.3 in)	36 years	36 of 100 (Notable)
28 November 2010	Thornleigh, AU	daily rain	66.0 mm (2.6 in)	50.0 mm (2.0 in)	3 years	48 of 100 (Notable)
18 November 2010	Thornleigh, AU	daily rain	29.0 mm (1.1 in)	3.6 mm (0.14 in)	15 years	15 of 100 (Routine)
15 November 2010	Thornleigh, AU	daily rain	62.0 mm (2.4 in)	36.4 mm (1.4 in)	8 years	42 of 100 (Notable)
14 November 2010	Thornleigh, AU	daily rain	24.0 mm (0.9 in)	16.0 mm (0.6 in)	0 years	20 of 100 (Routine)
15 October 2010	Thornleigh, AU	monthly rain	66.0 mm (2.6 in)	14.0 mm (0.6 in)	23 years	38 of 100 (Notable)
8 October 2010	Thornleigh, AU	daily rain	19.0 mm (0.7 in)	10.0 mm (0.4 in)	3 years	18 of 100 (Routine)

Extremes by Year

1922 to 2020

Yearly extremes at Thornleigh: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	146.6 mm (5.8 in)	1993	38.5 mm (1.5 in)	83
Wettest five days (Rx5day)	197.7 mm (7.8 in)	1990	58.0 mm (2.3 in)	83
Longest dry spell (CDD)	187 days	1982	62 days	83

Wettest day (Rx1day)

The wettest day of the year at Thornleigh, 1922 to 2020. The record is 146.6 mm (5.8 in) in 1993, marked on the chart; the median year is 38.5 mm (1.5 in).

Wettest day (Rx1day) at Thornleigh by year
Year	Wettest day (Rx1day)
1922	0.0 mm (0.00 in)
1923	0.0 mm (0.00 in)
1926	0.0 mm (0.00 in)
1927	0.0 mm (0.00 in)
1928	0.0 mm (0.00 in)
1929	0.0 mm (0.00 in)
1930	0.0 mm (0.00 in)
1931	0.0 mm (0.00 in)
1932	0.0 mm (0.00 in)
1934	0.0 mm (0.00 in)
1935	0.0 mm (0.00 in)
1936	0.0 mm (0.00 in)
1937	0.0 mm (0.00 in)
1938	0.0 mm (0.00 in)
1939	0.0 mm (0.00 in)
1940	0.0 mm (0.00 in)
1941	0.0 mm (0.00 in)
1942	0.0 mm (0.00 in)
1943	0.0 mm (0.00 in)
1944	0.0 mm (0.00 in)
1945	0.0 mm (0.00 in)
1946	0.0 mm (0.00 in)
1947	0.0 mm (0.00 in)
1948	0.0 mm (0.00 in)
1949	0.0 mm (0.00 in)
1950	0.0 mm (0.00 in)
1951	0.0 mm (0.00 in)
1952	0.0 mm (0.00 in)
1953	0.0 mm (0.00 in)
1954	0.0 mm (0.00 in)
1955	0.0 mm (0.00 in)
1957	0.0 mm (0.00 in)
1969	68.8 mm (2.7 in)
1970	29.7 mm (1.2 in)
1971	111.3 mm (4.4 in)
1972	62.0 mm (2.4 in)
1973	97.8 mm (3.9 in)
1974	87.0 mm (3.4 in)
1975	57.2 mm (2.3 in)
1976	53.8 mm (2.1 in)
1977	71.2 mm (2.8 in)
1978	81.2 mm (3.2 in)
1979	63.6 mm (2.5 in)
1980	71.2 mm (2.8 in)
1981	60.6 mm (2.4 in)
1982	37.6 mm (1.5 in)
1983	57.4 mm (2.3 in)
1984	90.0 mm (3.5 in)
1985	28.2 mm (1.1 in)
1986	44.2 mm (1.7 in)
1987	60.4 mm (2.4 in)
1988	53.8 mm (2.1 in)
1989	88.2 mm (3.5 in)
1990	122.0 mm (4.8 in)
1991	80.2 mm (3.2 in)
1992	38.5 mm (1.5 in)
1993	146.6 mm (5.8 in)
1994	69.2 mm (2.7 in)
1995	45.0 mm (1.8 in)
1996	61.6 mm (2.4 in)
1997	67.0 mm (2.6 in)
1998	83.8 mm (3.3 in)
1999	129.5 mm (5.1 in)
2000	54.0 mm (2.1 in)
2001	51.0 mm (2.0 in)
2002	47.0 mm (1.9 in)
2003	75.0 mm (3.0 in)
2004	49.8 mm (2.0 in)
2005	31.0 mm (1.2 in)
2006	122.0 mm (4.8 in)
2007	48.0 mm (1.9 in)
2008	52.0 mm (2.0 in)
2009	52.0 mm (2.0 in)
2010	89.0 mm (3.5 in)
2011	63.0 mm (2.5 in)
2012	19.0 mm (0.7 in)
2013	20.0 mm (0.8 in)
2014	18.0 mm (0.7 in)
2015	48.0 mm (1.9 in)
2017	11.0 mm (0.4 in)
2018	5.0 mm (0.20 in)
2019	53.0 mm (2.1 in)
2020	64.0 mm (2.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Thornleigh, 1922 to 2020. The record is 197.7 mm (7.8 in) in 1990, marked on the chart; the median year is 58.0 mm (2.3 in).

Wettest five days (Rx5day) at Thornleigh by year
Year	Wettest five days (Rx5day)
1922	0.0 mm (0.00 in)
1923	0.0 mm (0.00 in)
1926	0.0 mm (0.00 in)
1927	0.0 mm (0.00 in)
1928	0.0 mm (0.00 in)
1929	0.0 mm (0.00 in)
1930	0.0 mm (0.00 in)
1931	0.0 mm (0.00 in)
1932	0.0 mm (0.00 in)
1934	0.0 mm (0.00 in)
1935	0.0 mm (0.00 in)
1936	0.0 mm (0.00 in)
1937	0.0 mm (0.00 in)
1938	0.0 mm (0.00 in)
1939	0.0 mm (0.00 in)
1940	0.0 mm (0.00 in)
1941	0.0 mm (0.00 in)
1942	0.0 mm (0.00 in)
1943	0.0 mm (0.00 in)
1944	0.0 mm (0.00 in)
1945	0.0 mm (0.00 in)
1946	0.0 mm (0.00 in)
1947	0.0 mm (0.00 in)
1948	0.0 mm (0.00 in)
1949	0.0 mm (0.00 in)
1950	0.0 mm (0.00 in)
1951	0.0 mm (0.00 in)
1952	0.0 mm (0.00 in)
1953	0.0 mm (0.00 in)
1954	0.0 mm (0.00 in)
1955	0.0 mm (0.00 in)
1957	0.0 mm (0.00 in)
1969	94.2 mm (3.7 in)
1970	36.6 mm (1.4 in)
1971	146.1 mm (5.8 in)
1972	97.9 mm (3.9 in)
1973	179.0 mm (7.0 in)
1974	143.8 mm (5.7 in)
1975	75.8 mm (3.0 in)
1976	96.6 mm (3.8 in)
1977	137.0 mm (5.4 in)
1978	114.6 mm (4.5 in)
1979	120.0 mm (4.7 in)
1980	85.6 mm (3.4 in)
1981	86.4 mm (3.4 in)
1982	56.6 mm (2.2 in)
1983	97.4 mm (3.8 in)
1984	109.8 mm (4.3 in)
1985	51.8 mm (2.0 in)
1986	62.0 mm (2.4 in)
1987	83.6 mm (3.3 in)
1988	60.2 mm (2.4 in)
1989	113.6 mm (4.5 in)
1990	197.7 mm (7.8 in)
1991	109.0 mm (4.3 in)
1992	59.4 mm (2.3 in)
1993	186.0 mm (7.3 in)
1994	135.6 mm (5.3 in)
1995	58.6 mm (2.3 in)
1996	86.0 mm (3.4 in)
1997	162.8 mm (6.4 in)
1998	83.8 mm (3.3 in)
1999	181.6 mm (7.1 in)
2000	86.8 mm (3.4 in)
2001	95.2 mm (3.7 in)
2002	89.0 mm (3.5 in)
2003	105.1 mm (4.1 in)
2004	177.8 mm (7.0 in)
2005	58.0 mm (2.3 in)
2006	127.0 mm (5.0 in)
2007	59.0 mm (2.3 in)
2008	53.0 mm (2.1 in)
2009	79.0 mm (3.1 in)
2010	158.5 mm (6.2 in)
2011	88.0 mm (3.5 in)
2012	19.0 mm (0.7 in)
2013	26.0 mm (1.0 in)
2014	25.0 mm (1.0 in)
2015	67.0 mm (2.6 in)
2017	11.0 mm (0.4 in)
2018	5.0 mm (0.20 in)
2019	98.0 mm (3.9 in)
2020	71.0 mm (2.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Thornleigh, 1922 to 2020. The record is 187 days in 1982, marked on the chart; the median year is 62 days.

Longest dry spell (CDD) at Thornleigh by year
Year	Longest dry spell (CDD)
1922	92 days
1923	28 days
1926	31 days
1927	62 days
1928	61 days
1929	92 days
1930	61 days
1931	31 days
1932	92 days
1934	61 days
1935	31 days
1936	30 days
1937	92 days
1938	62 days
1939	31 days
1940	61 days
1941	92 days
1942	31 days
1943	62 days
1944	31 days
1945	61 days
1946	123 days
1947	61 days
1948	61 days
1949	62 days
1950	31 days
1951	92 days
1952	122 days
1953	61 days
1954	31 days
1955	61 days
1957	122 days
1969	89 days
1970	97 days
1971	47 days
1972	69 days
1973	29 days
1974	56 days
1975	46 days
1976	47 days
1977	45 days
1978	38 days
1979	114 days
1980	77 days
1981	87 days
1982	187 days
1983	38 days
1984	62 days
1985	77 days
1986	86 days
1987	78 days
1988	47 days
1989	100 days
1990	67 days
1991	112 days
1992	78 days
1993	50 days
1994	97 days
1995	104 days
1996	41 days
1997	51 days
1998	51 days
1999	179 days
2000	73 days
2001	77 days
2002	123 days
2003	168 days
2004	66 days
2005	82 days
2006	134 days
2007	67 days
2008	80 days
2009	91 days
2010	83 days
2011	36 days
2012	42 days
2013	79 days
2014	73 days
2015	58 days
2017	41 days
2018	56 days
2019	90 days
2020	86 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

40 years, 1970 to 2009

A day with at least 62.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 169.3 mm (6.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Thornleigh: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	62.3 mm (2.5 in)
5 years	87.3 mm (3.4 in)
10 years	105.2 mm (4.1 in)
25 years	129.6 mm (5.1 in)
50 years	149.0 mm (5.9 in)	Longer than the 40 years of record
100 years	169.3 mm (6.7 in)	Longer than the 40 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, 40 years of values from 1970 to 2009.

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: 146.6 mm (5.8 in) in 1993; 129.5 mm (5.1 in) in 1999; 122.0 mm (4.8 in) in 1990.

Download the Data

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