Harwell Weather Records (ASN00098003)

Record envelope, standing records and threshold days for Harwell (ASN00098003), Australia, with 79 years of record.

Key Facts for Harwell

Harwell (ASN00098003) is a weather station in Australia at -39.92 latitude and 143.93 longitude, 74 m (243 ft) above sea level.
The station reports from 1941 to 2019, 79 years of record.
0 records set at Harwell still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Harwell set a daily record precipitation of 23.0 mm (0.9 in) on 14 December 2018.

About the Station

Location: Australia, -39.92 latitude, 143.93 longitude.
Elevation: 74 m (243 ft).
Period of record: 1941 to 2019, 79 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 Harwell. 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 Harwell, 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 Harwell still stand.

Wettest Day of Each Month

Feb: 133.6 mm (5.3 in)

The wettest day on record for each calendar month at Harwell. The most was 133.6 mm (5.3 in) on 19 February 1946.

Record daily precipitation for each month at Harwell
Month	Record daily precipitation (mm)	Date
Jan	62.4 mm (2.5 in)	14 January 2011
Feb	133.6 mm (5.3 in)	19 February 1946
Mar	108.0 mm (4.3 in)	14 March 1979
Apr	58.9 mm (2.3 in)	11 April 1948
May	82.2 mm (3.2 in)	18 May 1992
Jun	61.7 mm (2.4 in)	25 June 1955
Jul	56.2 mm (2.2 in)	8 July 1993
Aug	62.8 mm (2.5 in)	17 August 1981
Sep	61.0 mm (2.4 in)	23 September 1998
Oct	54.4 mm (2.1 in)	9 October 1992
Nov	91.4 mm (3.6 in)	10 November 1966
Dec	56.9 mm (2.2 in)	7 December 1953

Latest Records

Latest records at Harwell
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 December 2018	Harwell, AU	daily rain	23.0 mm (0.9 in)	8.4 mm (0.33 in)	9 years	20 of 100 (Routine)
11 May 2018	Harwell, AU	daily rain	19.0 mm (0.7 in)	5.3 mm (0.21 in)	73 years	20 of 100 (Routine)
3 July 2017	Harwell, AU	daily rain	31.0 mm (1.2 in)	14.2 mm (0.6 in)	24 years	36 of 100 (Notable)
20 January 2017	Harwell, AU	daily rain	23.0 mm (0.9 in)	5.2 mm (0.20 in)	75 years	20 of 100 (Routine)
29 December 2016	Harwell, AU	daily rain	23.0 mm (0.9 in)	14.6 mm (0.6 in)	66 years	20 of 100 (Routine)
13 November 2016	Harwell, AU	daily rain	31.8 mm (1.3 in)	14.0 mm (0.6 in)	32 years	35 of 100 (Notable)
9 September 2016	Harwell, AU	daily rain	53.0 mm (2.1 in)	27.1 mm (1.1 in)	64 years	66 of 100 (Major)
24 June 2016	Harwell, AU	daily rain	46.8 mm (1.8 in)	19.8 mm (0.8 in)	38 years	47 of 100 (Notable)
23 June 2016	Harwell, AU	daily rain	36.2 mm (1.4 in)	7.0 mm (0.28 in)	61 years	35 of 100 (Notable)
1 May 2016	Harwell, AU	daily rain	26.0 mm (1.0 in)	6.8 mm (0.27 in)	27 years	24 of 100 (Routine)
25 February 2016	Harwell, AU	daily rain	47.6 mm (1.9 in)	31.0 mm (1.2 in)	36 years	56 of 100 (Notable)
31 January 2016	Harwell, AU	daily rain	61.0 mm (2.4 in)	48.3 mm (1.9 in)	53 years	63 of 100 (Major)
25 December 2015	Harwell, AU	daily rain	24.2 mm (1.0 in)	9.5 mm (0.37 in)	68 years	20 of 100 (Routine)
7 September 2015	Harwell, AU	daily rain	26.0 mm (1.0 in)	6.9 mm (0.27 in)	57 years	36 of 100 (Notable)
14 February 2015	Harwell, AU	daily rain	42.2 mm (1.7 in)	19.8 mm (0.8 in)	55 years	47 of 100 (Notable)
3 May 2014	Harwell, AU	daily rain	34.2 mm (1.3 in)	1.4 mm (0.06 in)	72 years	29 of 100 (Routine)
30 April 2014	Harwell, AU	daily rain	19.0 mm (0.7 in)	1.8 mm (0.07 in)	40 years	20 of 100 (Routine)
12 November 2013	Harwell, AU	daily rain (Tie)	19.0 mm (0.7 in)	tie	12 years	2 of 100 (Routine)
9 November 2013	Harwell, AU	daily rain	33.2 mm (1.3 in)	4.8 mm (0.19 in)	66 years	32 of 100 (Routine)
18 September 2013	Harwell, AU	daily rain	25.4 mm (1.0 in)	5.8 mm (0.23 in)	70 years	38 of 100 (Notable)

Extremes by Year

1941 to 2019

Yearly extremes at Harwell: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	133.6 mm (5.3 in)	1946	40.0 mm (1.6 in)	79
Wettest five days (Rx5day)	153.5 mm (6.0 in)	1946	75.8 mm (3.0 in)	79
Longest dry spell (CDD)	40 days	2014	16 days	79

Wettest day (Rx1day)

The wettest day of the year at Harwell, 1941 to 2019. The record is 133.6 mm (5.3 in) in 1946, marked on the chart; the median year is 40.0 mm (1.6 in).

Wettest day (Rx1day) at Harwell by year
Year	Wettest day (Rx1day)
1941	25.7 mm (1.0 in)
1942	32.8 mm (1.3 in)
1943	29.2 mm (1.1 in)
1944	31.2 mm (1.2 in)
1945	30.2 mm (1.2 in)
1946	133.6 mm (5.3 in)
1947	39.9 mm (1.6 in)
1948	58.9 mm (2.3 in)
1949	41.9 mm (1.6 in)
1950	30.5 mm (1.2 in)
1951	46.5 mm (1.8 in)
1952	70.6 mm (2.8 in)
1953	56.9 mm (2.2 in)
1954	28.7 mm (1.1 in)
1955	61.7 mm (2.4 in)
1956	30.5 mm (1.2 in)
1957	35.1 mm (1.4 in)
1958	50.8 mm (2.0 in)
1959	31.2 mm (1.2 in)
1960	46.2 mm (1.8 in)
1961	39.4 mm (1.6 in)
1962	24.6 mm (1.0 in)
1963	54.9 mm (2.2 in)
1964	31.8 mm (1.3 in)
1965	41.1 mm (1.6 in)
1966	91.4 mm (3.6 in)
1967	41.1 mm (1.6 in)
1968	33.3 mm (1.3 in)
1969	46.7 mm (1.8 in)
1970	55.4 mm (2.2 in)
1971	46.5 mm (1.8 in)
1972	31.0 mm (1.2 in)
1973	41.1 mm (1.6 in)
1974	39.0 mm (1.5 in)
1975	38.2 mm (1.5 in)
1976	34.2 mm (1.3 in)
1977	82.2 mm (3.2 in)
1978	44.0 mm (1.7 in)
1979	108.0 mm (4.3 in)
1980	34.4 mm (1.4 in)
1981	62.8 mm (2.5 in)
1982	26.6 mm (1.0 in)
1983	71.8 mm (2.8 in)
1984	28.6 mm (1.1 in)
1985	43.0 mm (1.7 in)
1986	64.2 mm (2.5 in)
1987	35.4 mm (1.4 in)
1988	22.6 mm (0.9 in)
1989	46.2 mm (1.8 in)
1990	51.2 mm (2.0 in)
1991	27.4 mm (1.1 in)
1992	82.2 mm (3.2 in)
1993	56.2 mm (2.2 in)
1994	33.0 mm (1.3 in)
1995	25.6 mm (1.0 in)
1996	49.8 mm (2.0 in)
1997	43.0 mm (1.7 in)
1998	61.0 mm (2.4 in)
1999	23.6 mm (0.9 in)
2000	43.8 mm (1.7 in)
2001	28.8 mm (1.1 in)
2002	41.0 mm (1.6 in)
2003	45.0 mm (1.8 in)
2004	20.0 mm (0.8 in)
2005	29.4 mm (1.2 in)
2006	21.6 mm (0.9 in)
2007	40.0 mm (1.6 in)
2008	45.2 mm (1.8 in)
2009	30.0 mm (1.2 in)
2010	34.6 mm (1.4 in)
2011	68.2 mm (2.7 in)
2012	55.0 mm (2.2 in)
2013	37.0 mm (1.5 in)
2014	34.2 mm (1.3 in)
2015	42.2 mm (1.7 in)
2016	61.0 mm (2.4 in)
2017	31.4 mm (1.2 in)
2018	31.0 mm (1.2 in)
2019	23.0 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Harwell, 1941 to 2019. The record is 153.5 mm (6.0 in) in 1946, marked on the chart; the median year is 75.8 mm (3.0 in).

Wettest five days (Rx5day) at Harwell by year
Year	Wettest five days (Rx5day)
1941	52.6 mm (2.1 in)
1942	90.9 mm (3.6 in)
1943	80.0 mm (3.1 in)
1944	69.0 mm (2.7 in)
1945	74.3 mm (2.9 in)
1946	153.5 mm (6.0 in)
1947	97.0 mm (3.8 in)
1948	103.0 mm (4.1 in)
1949	88.4 mm (3.5 in)
1950	60.4 mm (2.4 in)
1951	116.6 mm (4.6 in)
1952	115.1 mm (4.5 in)
1953	68.3 mm (2.7 in)
1954	53.0 mm (2.1 in)
1955	107.4 mm (4.2 in)
1956	99.3 mm (3.9 in)
1957	96.6 mm (3.8 in)
1958	95.1 mm (3.7 in)
1959	86.4 mm (3.4 in)
1960	86.9 mm (3.4 in)
1961	67.9 mm (2.7 in)
1962	69.3 mm (2.7 in)
1963	79.1 mm (3.1 in)
1964	80.8 mm (3.2 in)
1965	71.1 mm (2.8 in)
1966	137.6 mm (5.4 in)
1967	110.1 mm (4.3 in)
1968	66.4 mm (2.6 in)
1969	72.4 mm (2.9 in)
1970	80.6 mm (3.2 in)
1971	93.7 mm (3.7 in)
1972	68.3 mm (2.7 in)
1973	62.7 mm (2.5 in)
1974	67.8 mm (2.7 in)
1975	73.2 mm (2.9 in)
1976	77.2 mm (3.0 in)
1977	97.6 mm (3.8 in)
1978	62.2 mm (2.4 in)
1979	132.8 mm (5.2 in)
1980	75.8 mm (3.0 in)
1981	116.0 mm (4.6 in)
1982	70.2 mm (2.8 in)
1983	106.4 mm (4.2 in)
1984	66.6 mm (2.6 in)
1985	89.8 mm (3.5 in)
1986	118.0 mm (4.6 in)
1987	76.2 mm (3.0 in)
1988	60.2 mm (2.4 in)
1989	60.8 mm (2.4 in)
1990	87.8 mm (3.5 in)
1991	63.4 mm (2.5 in)
1992	133.8 mm (5.3 in)
1993	69.8 mm (2.7 in)
1994	64.2 mm (2.5 in)
1995	66.6 mm (2.6 in)
1996	109.6 mm (4.3 in)
1997	61.8 mm (2.4 in)
1998	65.8 mm (2.6 in)
1999	53.6 mm (2.1 in)
2000	98.4 mm (3.9 in)
2001	50.0 mm (2.0 in)
2002	70.0 mm (2.8 in)
2003	74.2 mm (2.9 in)
2004	38.2 mm (1.5 in)
2005	60.2 mm (2.4 in)
2006	45.6 mm (1.8 in)
2007	86.6 mm (3.4 in)
2008	65.0 mm (2.6 in)
2009	68.8 mm (2.7 in)
2010	79.8 mm (3.1 in)
2011	131.0 mm (5.2 in)
2012	91.2 mm (3.6 in)
2013	88.6 mm (3.5 in)
2014	83.4 mm (3.3 in)
2015	43.0 mm (1.7 in)
2016	99.4 mm (3.9 in)
2017	58.8 mm (2.3 in)
2018	64.4 mm (2.5 in)
2019	49.2 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Harwell, 1941 to 2019. The record is 40 days in 2014, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Harwell by year
Year	Longest dry spell (CDD)
1941	20 days
1942	10 days
1943	18 days
1944	14 days
1945	14 days
1946	10 days
1947	19 days
1948	21 days
1949	11 days
1950	21 days
1951	35 days
1952	20 days
1953	17 days
1954	27 days
1955	13 days
1956	20 days
1957	11 days
1958	15 days
1959	24 days
1960	26 days
1961	17 days
1962	19 days
1963	19 days
1964	12 days
1965	14 days
1966	16 days
1967	21 days
1968	18 days
1969	9 days
1970	25 days
1971	22 days
1972	31 days
1973	11 days
1974	14 days
1975	15 days
1976	16 days
1977	11 days
1978	15 days
1979	13 days
1980	13 days
1981	9 days
1982	11 days
1983	30 days
1984	19 days
1985	15 days
1986	16 days
1987	15 days
1988	15 days
1989	14 days
1990	15 days
1991	18 days
1992	10 days
1993	19 days
1994	20 days
1995	9 days
1996	18 days
1997	14 days
1998	12 days
1999	10 days
2000	33 days
2001	16 days
2002	16 days
2003	26 days
2004	17 days
2005	11 days
2006	20 days
2007	12 days
2008	13 days
2009	17 days
2010	16 days
2011	11 days
2012	17 days
2013	17 days
2014	40 days
2015	25 days
2016	13 days
2017	18 days
2018	15 days
2019	20 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

78 years, 1941 to 2018

A day with at least 39.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 121.4 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Harwell: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	39.4 mm (1.6 in)
5 years	54.9 mm (2.2 in)
10 years	67.4 mm (2.7 in)
25 years	86.1 mm (3.4 in)
50 years	102.6 mm (4.0 in)
100 years	121.4 mm (4.8 in)	Longer than the 78 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, 78 years of values from 1941 to 2018.

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: 133.6 mm (5.3 in) in 1946; 108.0 mm (4.3 in) in 1979; 91.4 mm (3.6 in) in 1966.

Download the Data

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