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Koomooloo Station Weather Records (ASN00020009)

Record envelope, standing records and threshold days for Koomooloo Station (ASN00020009), Australia, with 54 years of record.

Key Facts for Koomooloo Station

  • Koomooloo Station (ASN00020009) is a weather station in Australia at -33.55 latitude and 139.60 longitude, 110 m (361 ft) above sea level.
  • The station reports from 1925 to 1978, 54 years of record.
  • 0 records set at Koomooloo Station still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Koomooloo Station tied a daily record precipitation of 17.0 mm (0.7 in) on 19 August 1978.

About the Station

  • Location: Australia, -33.55 latitude, 139.60 longitude.
  • Elevation: 110 m (361 ft).
  • Period of record: 1925 to 1978, 54 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Koomooloo Station, with 2026 drawn through them The band shows the record high and record low for each calendar day at Koomooloo Station. 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 Koomooloo Station. 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 Koomooloo Station, 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 Koomooloo Station by the year they were set 0 records at Koomooloo Station still stand. 00000000000
0 records at Koomooloo Station still stand.
Standing records at Koomooloo Station by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Koomooloo Station set new all-time records 1 all-time records were set at Koomooloo Station between 14 December 1973 and 14 December 1973. Each dot is a new record. Record daily precipitation14 December 1973: Record daily precipitation 71.1 mm (2.8 in)
1 all-time records were set at Koomooloo Station between 14 December 1973 and 14 December 1973. Each dot is a new record.
When Koomooloo Station set new all-time records
DateKindDetail
1973-12-14Record daily precipitationRecord daily precipitation 71.1 mm (2.8 in)

Wettest Day of Each Month

Dec: 71.1 mm (2.8 in)
Record daily precipitation for each month at Koomooloo Station The wettest day on record for each calendar month at Koomooloo Station. The most was 71.1 mm (2.8 in) on 14 December 1973. 020406080 Jan: 48.3 mm (1.9 in), 11 January 1972 Jan Feb: 64.0 mm (2.5 in), 2 February 1950 Feb Mar: 68.6 mm (2.7 in), 17 March 1950 Mar Apr: 33.0 mm (1.3 in), 14 April 1954 Apr May: 49.5 mm (1.9 in), 25 May 1955 May Jun: 28.4 mm (1.1 in), 21 June 1957 Jun Jul: 24.4 mm (1.0 in), 3 July 1960 Jul Aug: 31.0 mm (1.2 in), 15 August 1958 Aug Sep: 29.2 mm (1.1 in), 10 September 1964 Sep Oct: 40.1 mm (1.6 in), 9 October 1949 Oct Nov: 54.6 mm (2.1 in), 4 November 1970 Nov Dec: 71.1 mm (2.8 in), 14 December 1973 Dec
The wettest day on record for each calendar month at Koomooloo Station. The most was 71.1 mm (2.8 in) on 14 December 1973.
Record daily precipitation for each month at Koomooloo Station
MonthRecord daily precipitation (mm)Date
Jan48.3 mm (1.9 in)11 January 1972
Feb64.0 mm (2.5 in)2 February 1950
Mar68.6 mm (2.7 in)17 March 1950
Apr33.0 mm (1.3 in)14 April 1954
May49.5 mm (1.9 in)25 May 1955
Jun28.4 mm (1.1 in)21 June 1957
Jul24.4 mm (1.0 in)3 July 1960
Aug31.0 mm (1.2 in)15 August 1958
Sep29.2 mm (1.1 in)10 September 1964
Oct40.1 mm (1.6 in)9 October 1949
Nov54.6 mm (2.1 in)4 November 1970
Dec71.1 mm (2.8 in)14 December 1973

Latest Records

20
Latest records at Koomooloo Station
DateStationRecordValueBeat old record byOld record stoodSignificance
19 August 1978Koomooloo Station, AUdaily rain (Tie)17.0 mm (0.7 in)tie48 years4 of 100 (Routine)
7 August 1978Koomooloo Station, AUdaily rain11.5 mm (0.5 in)6.2 mm (0.24 in)8 years19 of 100 (Routine)
27 November 1977Koomooloo Station, AUdaily rain38.0 mm (1.5 in)19.7 mm (0.8 in)4 years24 of 100 (Routine)
1 November 1977Koomooloo Station, AUdaily rain12.5 mm (0.5 in)8.4 mm (0.33 in)12 years16 of 100 (Routine)
2 October 1977Koomooloo Station, AUdaily rain7.2 mm (0.28 in)0.1 mm (0.00 in)11 years8 of 100 (Routine)
12 May 1977Koomooloo Station, AUdaily rain6.1 mm (0.24 in)0.5 mm (0.02 in)18 years10 of 100 (Routine)
13 October 1976Koomooloo Station, AUdaily rain37.5 mm (1.5 in)35.5 mm (1.4 in)14 years49 of 100 (Notable)
4 October 1976Koomooloo Station, AUdaily rain35.2 mm (1.4 in)24.3 mm (1.0 in)17 years43 of 100 (Notable)
3 October 1976Koomooloo Station, AUdaily rain18.2 mm (0.7 in)8.8 mm (0.35 in)18 years20 of 100 (Routine)
28 July 1976Koomooloo Station, AUdaily rain8.0 mm (0.31 in)1.6 mm (0.06 in)33 years17 of 100 (Routine)
13 December 1975Koomooloo Station, AUdaily rain25.6 mm (1.0 in)19.8 mm (0.8 in)13 years24 of 100 (Routine)
25 October 1975Koomooloo Station, AUdaily rain18.2 mm (0.7 in)0.4 mm (0.02 in)1 year5 of 100 (Routine)
8 October 1975Koomooloo Station, AUdaily rain10.6 mm (0.4 in)3.2 mm (0.13 in)16 years13 of 100 (Routine)
30 September 1975Koomooloo Station, AUdaily rain15.8 mm (0.6 in)7.9 mm (0.31 in)46 years20 of 100 (Routine)
21 September 1975Koomooloo Station, AUdaily rain2.0 mm (0.08 in)0.5 mm (0.02 in)40 years17 of 100 (Routine)
16 September 1975Koomooloo Station, AUdaily rain29.0 mm (1.1 in)26.5 mm (1.0 in)26 years52 of 100 (Notable)
7 May 1975Koomooloo Station, AUdaily rain5.0 mm (0.20 in)2.0 mm (0.08 in)0 years7 of 100 (Routine)
13 November 1974Koomooloo Station, AUdaily rain3.6 mm (0.14 in)1.1 mm (0.04 in)9 years8 of 100 (Routine)
30 July 1974Koomooloo Station, AUdaily rain10.0 mm (0.4 in)1.6 mm (0.06 in)35 years18 of 100 (Routine)
18 July 1974Koomooloo Station, AUdaily rain8.8 mm (0.35 in)5.2 mm (0.20 in)20 years20 of 100 (Routine)

Extremes by Year

1925 to 1978
Yearly extremes at Koomooloo Station: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)71.1 mm (2.8 in)197330.0 mm (1.2 in)51
Wettest five days (Rx5day)121.0 mm (4.8 in)197339.4 mm (1.6 in)51
Longest dry spell (CDD)127 days196557 days51

Wettest day (Rx1day)

Wettest day (Rx1day) at Koomooloo Station by year The wettest day of the year at Koomooloo Station, 1925 to 1978. The record is 71.1 mm (2.8 in) in 1973, marked on the chart; the median year is 30.0 mm (1.2 in). 02040608019301940195019601970Record: 71.1 mm (2.8 in) in 1973
The wettest day of the year at Koomooloo Station, 1925 to 1978. The record is 71.1 mm (2.8 in) in 1973, marked on the chart; the median year is 30.0 mm (1.2 in).
Wettest day (Rx1day) at Koomooloo Station by year
YearWettest day (Rx1day)
192520.1 mm (0.8 in)
192638.6 mm (1.5 in)
192720.3 mm (0.8 in)
192814.7 mm (0.6 in)
192946.5 mm (1.8 in)
193017.0 mm (0.7 in)
193120.6 mm (0.8 in)
193231.5 mm (1.2 in)
193329.0 mm (1.1 in)
193450.3 mm (2.0 in)
193510.9 mm (0.4 in)
193624.6 mm (1.0 in)
193738.9 mm (1.5 in)
193829.0 mm (1.1 in)
193945.0 mm (1.8 in)
19400.0 mm (0.00 in)
194133.0 mm (1.3 in)
194215.5 mm (0.6 in)
194319.6 mm (0.8 in)
194766.3 mm (2.6 in)
19486.4 mm (0.25 in)
194940.1 mm (1.6 in)
195068.6 mm (2.7 in)
195122.9 mm (0.9 in)
195230.5 mm (1.2 in)
195316.8 mm (0.7 in)
195433.0 mm (1.3 in)
195549.5 mm (1.9 in)
195632.5 mm (1.3 in)
195730.0 mm (1.2 in)
195831.0 mm (1.2 in)
195917.8 mm (0.7 in)
196024.4 mm (1.0 in)
196136.1 mm (1.4 in)
196250.8 mm (2.0 in)
196320.8 mm (0.8 in)
196429.2 mm (1.1 in)
196532.3 mm (1.3 in)
196632.0 mm (1.3 in)
19677.6 mm (0.30 in)
196821.1 mm (0.8 in)
196917.5 mm (0.7 in)
197054.6 mm (2.1 in)
197125.4 mm (1.0 in)
197248.3 mm (1.9 in)
197371.1 mm (2.8 in)
197440.5 mm (1.6 in)
197529.0 mm (1.1 in)
197637.5 mm (1.5 in)
197738.0 mm (1.5 in)
197817.0 mm (0.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Koomooloo Station by year The wettest five days of the year at Koomooloo Station, 1925 to 1978. The record is 121.0 mm (4.8 in) in 1973, marked on the chart; the median year is 39.4 mm (1.6 in). 05010015019301940195019601970Record: 121.0 mm (4.8 in) in 1973
The wettest five days of the year at Koomooloo Station, 1925 to 1978. The record is 121.0 mm (4.8 in) in 1973, marked on the chart; the median year is 39.4 mm (1.6 in).
Wettest five days (Rx5day) at Koomooloo Station by year
YearWettest five days (Rx5day)
192520.1 mm (0.8 in)
192641.5 mm (1.6 in)
192720.3 mm (0.8 in)
192822.6 mm (0.9 in)
192946.5 mm (1.8 in)
193019.1 mm (0.8 in)
193121.6 mm (0.9 in)
193231.5 mm (1.2 in)
193334.6 mm (1.4 in)
193450.3 mm (2.0 in)
193512.4 mm (0.5 in)
193633.6 mm (1.3 in)
193786.5 mm (3.4 in)
193844.9 mm (1.8 in)
193945.0 mm (1.8 in)
19400.0 mm (0.00 in)
194179.2 mm (3.1 in)
194225.7 mm (1.0 in)
194329.0 mm (1.1 in)
194780.8 mm (3.2 in)
194811.5 mm (0.5 in)
194940.1 mm (1.6 in)
195088.9 mm (3.5 in)
195134.5 mm (1.4 in)
195230.5 mm (1.2 in)
195316.8 mm (0.7 in)
195439.6 mm (1.6 in)
195563.7 mm (2.5 in)
195648.2 mm (1.9 in)
195741.4 mm (1.6 in)
195832.3 mm (1.3 in)
195927.5 mm (1.1 in)
196028.2 mm (1.1 in)
196149.1 mm (1.9 in)
1962106.9 mm (4.2 in)
196368.3 mm (2.7 in)
196445.5 mm (1.8 in)
196539.4 mm (1.6 in)
196671.1 mm (2.8 in)
196711.9 mm (0.5 in)
196834.6 mm (1.4 in)
196921.9 mm (0.9 in)
197059.7 mm (2.4 in)
197125.4 mm (1.0 in)
197256.2 mm (2.2 in)
1973121.0 mm (4.8 in)
197461.0 mm (2.4 in)
197533.8 mm (1.3 in)
197655.2 mm (2.2 in)
197748.0 mm (1.9 in)
197820.5 mm (0.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Koomooloo Station by year The longest dry spell of the year at Koomooloo Station, 1925 to 1978. The record is 127 days in 1965, marked on the chart; the median year is 57 days. 05010015019301940195019601970Record: 127 days in 1965
The longest dry spell of the year at Koomooloo Station, 1925 to 1978. The record is 127 days in 1965, marked on the chart; the median year is 57 days.
Longest dry spell (CDD) at Koomooloo Station by year
YearLongest dry spell (CDD)
192546 days
192681 days
192755 days
192848 days
192945 days
193047 days
193172 days
193276 days
193345 days
193455 days
193582 days
193653 days
193766 days
1938100 days
193955 days
194031 days
194187 days
194262 days
194359 days
194758 days
194891 days
194962 days
195049 days
195172 days
195291 days
1953125 days
195466 days
195544 days
195642 days
195778 days
195851 days
195960 days
196039 days
196145 days
196257 days
1963102 days
196445 days
1965127 days
196657 days
196782 days
196833 days
196941 days
197073 days
197155 days
197270 days
197350 days
197448 days
197553 days
197686 days
197743 days
197812 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, 1926 to 1977

A day with at least 30.9 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 80.6 mm (3.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Koomooloo Station: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years30.9 mm (1.2 in)
5 years45.8 mm (1.8 in)
10 years54.9 mm (2.2 in)
25 years65.8 mm (2.6 in)
50 years73.4 mm (2.9 in)Longer than the 40 years of record
100 years80.6 mm (3.2 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 1926 to 1977.

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: 71.1 mm (2.8 in) in 1973; 68.6 mm (2.7 in) in 1950; 66.3 mm (2.6 in) in 1947.

Download the Data

  • Data for Koomooloo Station standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Koomooloo Station 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).