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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

South Dandalup Dam Weather Records (ASN00009873)

Record envelope, standing records and threshold days for South Dandalup Dam (ASN00009873), Australia, with 36 years of record.

Key Facts for South Dandalup Dam

  • South Dandalup Dam (ASN00009873) is a weather station in Australia at -32.65 latitude and 116.04 longitude, 280 m (919 ft) above sea level.
  • The station reports from 1974 to 2009, 36 years of record.
  • 0 records set at South Dandalup Dam still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • South Dandalup Dam set a monthly record daily precipitation of 49.2 mm (1.9 in) on 19 November 2009.

About the Station

  • Location: Australia, -32.65 latitude, 116.04 longitude.
  • Elevation: 280 m (919 ft).
  • Period of record: 1974 to 2009, 36 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at South Dandalup Dam, with 2026 drawn through them The band shows the record high and record low for each calendar day at South Dandalup Dam. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at South Dandalup Dam. 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 South Dandalup Dam, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at South Dandalup Dam by the year they were set 0 records at South Dandalup Dam still stand. 00000000000
0 records at South Dandalup Dam still stand.
Standing records at South Dandalup Dam by the year they were set
Year setStanding records

Wettest Day of Each Month

Jan: 147.4 mm (5.8 in)
Record daily precipitation for each month at South Dandalup Dam The wettest day on record for each calendar month at South Dandalup Dam. The most was 147.4 mm (5.8 in) on 21 January 1982. 050100150 Jan: 147.4 mm (5.8 in), 21 January 1982 Jan Feb: 73.4 mm (2.9 in), 22 February 1986 Feb Mar: 50.4 mm (2.0 in), 11 March 1998 Mar Apr: 87.4 mm (3.4 in), 8 April 1987 Apr May: 96.0 mm (3.8 in), 2 May 2005 May Jun: 88.0 mm (3.5 in), 23 June 1991 Jun Jul: 78.0 mm (3.1 in), 29 July 1987 Jul Aug: 77.0 mm (3.0 in), 18 August 1989 Aug Sep: 54.4 mm (2.1 in), 8 September 1981 Sep Oct: 90.2 mm (3.6 in), 1 October 1978 Oct Nov: 49.2 mm (1.9 in), 19 November 2009 Nov Dec: 53.0 mm (2.1 in), 31 December 1980 Dec
The wettest day on record for each calendar month at South Dandalup Dam. The most was 147.4 mm (5.8 in) on 21 January 1982.
Record daily precipitation for each month at South Dandalup Dam
MonthRecord daily precipitation (mm)Date
Jan147.4 mm (5.8 in)21 January 1982
Feb73.4 mm (2.9 in)22 February 1986
Mar50.4 mm (2.0 in)11 March 1998
Apr87.4 mm (3.4 in)8 April 1987
May96.0 mm (3.8 in)2 May 2005
Jun88.0 mm (3.5 in)23 June 1991
Jul78.0 mm (3.1 in)29 July 1987
Aug77.0 mm (3.0 in)18 August 1989
Sep54.4 mm (2.1 in)8 September 1981
Oct90.2 mm (3.6 in)1 October 1978
Nov49.2 mm (1.9 in)19 November 2009
Dec53.0 mm (2.1 in)31 December 1980

Latest Records

20
Latest records at South Dandalup Dam
DateStationRecordValueBeat old record byOld record stoodSignificance
19 November 2009South Dandalup Dam, AUmonthly rain49.2 mm (1.9 in)10.6 mm (0.4 in)25 years34 of 100 (Routine)
12 September 2009South Dandalup Dam, AUdaily rain38.4 mm (1.5 in)10.6 mm (0.4 in)2 years13 of 100 (Routine)
15 August 2009South Dandalup Dam, AUdaily rain38.4 mm (1.5 in)1.4 mm (0.06 in)28 years12 of 100 (Routine)
14 August 2009South Dandalup Dam, AUdaily rain59.0 mm (2.3 in)31.0 mm (1.2 in)8 years31 of 100 (Routine)
23 July 2009South Dandalup Dam, AUdaily rain28.6 mm (1.1 in)0.6 mm (0.02 in)20 years9 of 100 (Routine)
17 July 2009South Dandalup Dam, AUdaily rain41.9 mm (1.6 in)4.7 mm (0.19 in)8 years8 of 100 (Routine)
25 June 2009South Dandalup Dam, AUdaily rain41.6 mm (1.6 in)14.0 mm (0.6 in)20 years19 of 100 (Routine)
19 January 2009South Dandalup Dam, AUdaily rain8.6 mm (0.34 in)3.0 mm (0.12 in)30 years13 of 100 (Routine)
23 November 2008South Dandalup Dam, AUdaily rain19.6 mm (0.8 in)15.6 mm (0.6 in)24 years20 of 100 (Routine)
6 November 2008South Dandalup Dam, AUdaily rain24.2 mm (1.0 in)8.8 mm (0.35 in)24 years20 of 100 (Routine)
4 November 2008South Dandalup Dam, AUdaily rain14.4 mm (0.6 in)6.2 mm (0.24 in)22 years17 of 100 (Routine)
29 October 2008South Dandalup Dam, AUdaily rain20.2 mm (0.8 in)14.2 mm (0.6 in)19 years20 of 100 (Routine)
25 October 2008South Dandalup Dam, AUdaily rain21.0 mm (0.8 in)1.8 mm (0.07 in)3 years4 of 100 (Routine)
25 September 2008South Dandalup Dam, AUdaily rain37.8 mm (1.5 in)18.2 mm (0.7 in)5 years22 of 100 (Routine)
18 July 2008South Dandalup Dam, AUdaily rain30.6 mm (1.2 in)5.4 mm (0.21 in)8 years9 of 100 (Routine)
16 July 2008South Dandalup Dam, AUdaily rain43.0 mm (1.7 in)13.8 mm (0.5 in)26 years20 of 100 (Routine)
1 June 2008South Dandalup Dam, AUdaily rain59.4 mm (2.3 in)6.0 mm (0.24 in)20 years13 of 100 (Routine)
6 April 2008South Dandalup Dam, AUdaily rain5.2 mm (0.20 in)4.4 mm (0.17 in)25 years13 of 100 (Routine)
5 April 2008South Dandalup Dam, AUdaily rain11.4 mm (0.4 in)7.0 mm (0.28 in)30 years16 of 100 (Routine)
1 April 2008South Dandalup Dam, AUdaily rain50.3 mm (2.0 in)29.3 mm (1.2 in)3 years23 of 100 (Routine)

Extremes by Year

1974 to 2009
Yearly extremes at South Dandalup Dam: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)147.4 mm (5.8 in)198261.2 mm (2.4 in)36
Wettest five days (Rx5day)214.6 mm (8.4 in)1982119.2 mm (4.7 in)36
Longest dry spell (CDD)66 days197538 days36

Wettest day (Rx1day)

Wettest day (Rx1day) at South Dandalup Dam by year The wettest day of the year at South Dandalup Dam, 1974 to 2009. The record is 147.4 mm (5.8 in) in 1982, marked on the chart; the median year is 61.2 mm (2.4 in). 050100150198019902000Record: 147.4 mm (5.8 in) in 1982
The wettest day of the year at South Dandalup Dam, 1974 to 2009. The record is 147.4 mm (5.8 in) in 1982, marked on the chart; the median year is 61.2 mm (2.4 in).
Wettest day (Rx1day) at South Dandalup Dam by year
YearWettest day (Rx1day)
197466.3 mm (2.6 in)
197552.2 mm (2.1 in)
197648.0 mm (1.9 in)
197747.0 mm (1.9 in)
197890.2 mm (3.6 in)
197947.4 mm (1.9 in)
198063.0 mm (2.5 in)
198155.0 mm (2.2 in)
1982147.4 mm (5.8 in)
198364.0 mm (2.5 in)
198476.6 mm (3.0 in)
198564.0 mm (2.5 in)
198673.4 mm (2.9 in)
198787.4 mm (3.4 in)
198870.0 mm (2.8 in)
198979.6 mm (3.1 in)
199059.0 mm (2.3 in)
199188.0 mm (3.5 in)
199286.0 mm (3.4 in)
199354.6 mm (2.1 in)
199463.0 mm (2.5 in)
199552.2 mm (2.1 in)
199648.8 mm (1.9 in)
199741.2 mm (1.6 in)
199856.6 mm (2.2 in)
199971.8 mm (2.8 in)
200052.4 mm (2.1 in)
200151.9 mm (2.0 in)
200263.4 mm (2.5 in)
200350.0 mm (2.0 in)
200451.0 mm (2.0 in)
200596.0 mm (3.8 in)
200643.4 mm (1.7 in)
200779.4 mm (3.1 in)
200859.4 mm (2.3 in)
200959.0 mm (2.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at South Dandalup Dam by year The wettest five days of the year at South Dandalup Dam, 1974 to 2009. The record is 214.6 mm (8.4 in) in 1982, marked on the chart; the median year is 119.2 mm (4.7 in). 50100150200250198019902000Record: 214.6 mm (8.4 in) in 1982
The wettest five days of the year at South Dandalup Dam, 1974 to 2009. The record is 214.6 mm (8.4 in) in 1982, marked on the chart; the median year is 119.2 mm (4.7 in).
Wettest five days (Rx5day) at South Dandalup Dam by year
YearWettest five days (Rx5day)
1974135.0 mm (5.3 in)
1975111.8 mm (4.4 in)
1976122.6 mm (4.8 in)
1977111.2 mm (4.4 in)
1978122.2 mm (4.8 in)
197999.4 mm (3.9 in)
1980109.4 mm (4.3 in)
1981115.8 mm (4.6 in)
1982214.6 mm (8.4 in)
1983136.8 mm (5.4 in)
1984110.8 mm (4.4 in)
1985116.6 mm (4.6 in)
198697.4 mm (3.8 in)
1987133.4 mm (5.3 in)
1988127.0 mm (5.0 in)
198996.8 mm (3.8 in)
1990152.0 mm (6.0 in)
1991128.8 mm (5.1 in)
1992150.4 mm (5.9 in)
1993120.2 mm (4.7 in)
1994118.2 mm (4.7 in)
1995111.8 mm (4.4 in)
1996139.8 mm (5.5 in)
1997118.7 mm (4.7 in)
1998133.1 mm (5.2 in)
1999110.5 mm (4.4 in)
2000141.8 mm (5.6 in)
200171.1 mm (2.8 in)
2002117.6 mm (4.6 in)
2003139.6 mm (5.5 in)
2004119.6 mm (4.7 in)
2005137.0 mm (5.4 in)
2006101.0 mm (4.0 in)
2007113.2 mm (4.5 in)
2008104.8 mm (4.1 in)
2009138.0 mm (5.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at South Dandalup Dam by year The longest dry spell of the year at South Dandalup Dam, 1974 to 2009. The record is 66 days in 1975, marked on the chart; the median year is 38 days. 020406080198019902000Record: 66 days in 1975
The longest dry spell of the year at South Dandalup Dam, 1974 to 2009. The record is 66 days in 1975, marked on the chart; the median year is 38 days.
Longest dry spell (CDD) at South Dandalup Dam by year
YearLongest dry spell (CDD)
197458 days
197566 days
197632 days
197731 days
197845 days
197926 days
198040 days
198143 days
198240 days
198337 days
198447 days
198525 days
198628 days
198749 days
198839 days
198929 days
199018 days
199152 days
199224 days
199341 days
199442 days
199526 days
199644 days
199733 days
199851 days
199957 days
200031 days
200141 days
200226 days
200332 days
200440 days
200544 days
200634 days
200735 days
200831 days
200937 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

35 years, 1974 to 2009

A day with at least 59.7 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 144.2 mm (5.7 in) of rain is expected about once in 100 years.

Rainfall return levels at South Dandalup Dam: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years59.7 mm (2.4 in)
5 years75.6 mm (3.0 in)
10 years88.4 mm (3.5 in)
25 years107.7 mm (4.2 in)
50 years124.7 mm (4.9 in)Longer than the 35 years of record
100 years144.2 mm (5.7 in)Longer than the 35 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, 35 years of values from 1974 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: 147.4 mm (5.8 in) in 1982; 96.0 mm (3.8 in) in 2005; 90.2 mm (3.6 in) in 1978.

Download the Data

  • Data for South Dandalup Dam standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for South Dandalup Dam 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 . Last revised (2025-12-31).