Built 2026-10-14 (14 October 2026)

Williamstown Weather Records (ASN00023752)

Record envelope, standing records and threshold days for Williamstown (ASN00023752), Australia, with 146 years of record.

Key Facts for Williamstown

  • Williamstown (ASN00023752) is a weather station in Australia at -34.67 latitude and 138.89 longitude, 280 m (919 ft) above sea level.
  • The station reports from 1881 to 2026, 146 years of record.
  • 0 records set at Williamstown still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Williamstown set a daily record precipitation of 47.8 mm (1.9 in) on 10 August 2026.

About the Station

  • Location: Australia, -34.67 latitude, 138.89 longitude.
  • Elevation: 280 m (919 ft).
  • Period of record: 1881 to 2026, 146 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Williamstown, with 2026 drawn through them The band shows the record high and record low for each calendar day at Williamstown. 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 Williamstown. 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 Williamstown, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

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

Wettest Day of Each Month

Apr: 123.7 mm (4.9 in)
Record daily precipitation for each month at Williamstown The wettest day on record for each calendar month at Williamstown. The most was 123.7 mm (4.9 in) on 17 April 1889. 050100150 Jan: 74.7 mm (2.9 in), 25 January 1941 Jan Feb: 69.9 mm (2.8 in), 14 February 1913 Feb Mar: 59.2 mm (2.3 in), 26 March 1902 Mar Apr: 123.7 mm (4.9 in), 17 April 1889 Apr May: 70.1 mm (2.8 in), 17 May 1898 May Jun: 96.0 mm (3.8 in), 12 June 1932 Jun Jul: 55.1 mm (2.2 in), 5 July 1891 Jul Aug: 50.4 mm (2.0 in), 3 August 2004 Aug Sep: 58.7 mm (2.3 in), 30 September 2016 Sep Oct: 60.5 mm (2.4 in), 7 October 1926 Oct Nov: 56.4 mm (2.2 in), 18 November 1992 Nov Dec: 94.6 mm (3.7 in), 8 December 2010 Dec
The wettest day on record for each calendar month at Williamstown. The most was 123.7 mm (4.9 in) on 17 April 1889.
Record daily precipitation for each month at Williamstown
MonthRecord daily precipitation (mm)Date
Jan74.7 mm (2.9 in)25 January 1941
Feb69.9 mm (2.8 in)14 February 1913
Mar59.2 mm (2.3 in)26 March 1902
Apr123.7 mm (4.9 in)17 April 1889
May70.1 mm (2.8 in)17 May 1898
Jun96.0 mm (3.8 in)12 June 1932
Jul55.1 mm (2.2 in)5 July 1891
Aug50.4 mm (2.0 in)3 August 2004
Sep58.7 mm (2.3 in)30 September 2016
Oct60.5 mm (2.4 in)7 October 1926
Nov56.4 mm (2.2 in)18 November 1992
Dec94.6 mm (3.7 in)8 December 2010

Latest Records

20
Latest records at Williamstown
DateStationRecordValueBeat old record byOld record stoodSignificance
10 August 2026Williamstown, AUdaily rain47.8 mm (1.9 in)16.3 mm (0.6 in)141 years63 of 100 (Major)
9 August 2026Williamstown, AUdaily rain34.0 mm (1.3 in)11.6 mm (0.5 in)57 years43 of 100 (Notable)
2 June 2026Williamstown, AUdaily rain38.0 mm (1.5 in)7.8 mm (0.31 in)87 years44 of 100 (Notable)
22 October 2025Williamstown, AUdaily rain45.0 mm (1.8 in)17.6 mm (0.7 in)108 years64 of 100 (Major)
26 July 2025Williamstown, AUdaily rain44.4 mm (1.7 in)22.3 mm (0.9 in)52 years59 of 100 (Notable)
16 August 2024Williamstown, AUdaily rain23.8 mm (0.9 in)3.5 mm (0.14 in)71 years20 of 100 (Routine)
7 January 2024Williamstown, AUdaily rain23.6 mm (0.9 in)5.6 mm (0.22 in)137 years20 of 100 (Routine)
10 December 2023Williamstown, AUdaily rain24.0 mm (0.9 in)4.2 mm (0.17 in)52 years20 of 100 (Routine)
28 November 2023Williamstown, AUdaily rain30.4 mm (1.2 in)13.4 mm (0.5 in)33 years37 of 100 (Notable)
29 January 2023Williamstown, AUdaily rain12.0 mm (0.5 in)2.2 mm (0.09 in)48 years20 of 100 (Routine)
14 November 2022Williamstown, AUdaily rain26.2 mm (1.0 in)0.8 mm (0.03 in)131 years41 of 100 (Notable)
13 November 2022Williamstown, AUdaily rain26.8 mm (1.1 in)0.4 mm (0.02 in)5 years11 of 100 (Routine)
30 May 2022Williamstown, AUdaily rain53.0 mm (2.1 in)14.9 mm (0.6 in)100 years57 of 100 (Notable)
12 November 2021Williamstown, AUdaily rain29.8 mm (1.2 in)2.1 mm (0.08 in)60 years30 of 100 (Routine)
29 October 2021Williamstown, AUdaily rain20.4 mm (0.8 in)3.9 mm (0.15 in)66 years20 of 100 (Routine)
17 July 2021Williamstown, AUdaily rain20.0 mm (0.8 in)2.5 mm (0.10 in)64 years20 of 100 (Routine)
26 April 2020Williamstown, AUdaily rain35.2 mm (1.4 in)2.4 mm (0.09 in)111 years42 of 100 (Notable)
4 April 2020Williamstown, AUdaily rain15.4 mm (0.6 in)4.2 mm (0.17 in)121 years20 of 100 (Routine)
22 November 2018Williamstown, AUdaily rain31.4 mm (1.2 in)21.2 mm (0.8 in)76 years60 of 100 (Major)
16 November 2017Williamstown, AUdaily rain22.4 mm (0.9 in)5.9 mm (0.23 in)100 years20 of 100 (Routine)

Extremes by Year

1881 to 2026
Yearly extremes at Williamstown: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)123.7 mm (4.9 in)188938.1 mm (1.5 in)145
Wettest five days (Rx5day)178.6 mm (7.0 in)188960.9 mm (2.4 in)145
Longest dry spell (CDD)89 days189332 days145

Wettest day (Rx1day)

Wettest day (Rx1day) at Williamstown by year The wettest day of the year at Williamstown, 1881 to 2026. The record is 123.7 mm (4.9 in) in 1889, marked on the chart; the median year is 38.1 mm (1.5 in). 0501001501900192019401960198020002020Record: 123.7 mm (4.9 in) in 1889
The wettest day of the year at Williamstown, 1881 to 2026. The record is 123.7 mm (4.9 in) in 1889, marked on the chart; the median year is 38.1 mm (1.5 in).
Wettest day (Rx1day) at Williamstown by year
YearWettest day (Rx1day)
18810.0 mm (0.00 in)
18820.0 mm (0.00 in)
188434.3 mm (1.4 in)
188558.7 mm (2.3 in)
188633.3 mm (1.3 in)
188737.6 mm (1.5 in)
188832.5 mm (1.3 in)
1889123.7 mm (4.9 in)
189057.4 mm (2.3 in)
189155.1 mm (2.2 in)
189228.7 mm (1.1 in)
189347.2 mm (1.9 in)
189434.0 mm (1.3 in)
189528.4 mm (1.1 in)
189643.7 mm (1.7 in)
189728.4 mm (1.1 in)
189870.1 mm (2.8 in)
189939.6 mm (1.6 in)
190045.7 mm (1.8 in)
190146.2 mm (1.8 in)
190259.2 mm (2.3 in)
190333.5 mm (1.3 in)
190460.5 mm (2.4 in)
190536.3 mm (1.4 in)
190655.9 mm (2.2 in)
190739.9 mm (1.6 in)
190854.6 mm (2.1 in)
190962.2 mm (2.4 in)
191040.6 mm (1.6 in)
191137.6 mm (1.5 in)
191239.4 mm (1.6 in)
191369.9 mm (2.8 in)
191424.6 mm (1.0 in)
191535.8 mm (1.4 in)
191647.2 mm (1.9 in)
191747.2 mm (1.9 in)
191826.2 mm (1.0 in)
191944.7 mm (1.8 in)
192045.7 mm (1.8 in)
192138.1 mm (1.5 in)
192245.2 mm (1.8 in)
192346.7 mm (1.8 in)
192438.1 mm (1.5 in)
192531.2 mm (1.2 in)
192660.5 mm (2.4 in)
192733.8 mm (1.3 in)
192834.0 mm (1.3 in)
192930.7 mm (1.2 in)
193024.4 mm (1.0 in)
193140.1 mm (1.6 in)
193296.0 mm (3.8 in)
193363.8 mm (2.5 in)
193438.4 mm (1.5 in)
193523.6 mm (0.9 in)
193635.1 mm (1.4 in)
193747.2 mm (1.9 in)
193854.6 mm (2.1 in)
193935.8 mm (1.4 in)
194027.4 mm (1.1 in)
194174.7 mm (2.9 in)
194250.3 mm (2.0 in)
194347.0 mm (1.9 in)
194427.7 mm (1.1 in)
194525.1 mm (1.0 in)
194640.4 mm (1.6 in)
194733.8 mm (1.3 in)
194884.1 mm (3.3 in)
194923.4 mm (0.9 in)
195045.0 mm (1.8 in)
195121.6 mm (0.9 in)
195237.6 mm (1.5 in)
195323.4 mm (0.9 in)
195433.8 mm (1.3 in)
195540.6 mm (1.6 in)
195632.8 mm (1.3 in)
195747.0 mm (1.9 in)
195843.2 mm (1.7 in)
195934.8 mm (1.4 in)
196066.0 mm (2.6 in)
196129.5 mm (1.2 in)
196238.9 mm (1.5 in)
196332.0 mm (1.3 in)
196433.0 mm (1.3 in)
196526.2 mm (1.0 in)
196636.6 mm (1.4 in)
196712.7 mm (0.5 in)
196845.5 mm (1.8 in)
196922.1 mm (0.9 in)
197040.1 mm (1.6 in)
197137.8 mm (1.5 in)
197229.2 mm (1.1 in)
197356.1 mm (2.2 in)
197451.0 mm (2.0 in)
197530.0 mm (1.2 in)
197621.6 mm (0.9 in)
197732.8 mm (1.3 in)
197837.2 mm (1.5 in)
197938.4 mm (1.5 in)
198040.2 mm (1.6 in)
198149.0 mm (1.9 in)
198216.6 mm (0.7 in)
198340.6 mm (1.6 in)
198436.0 mm (1.4 in)
198558.0 mm (2.3 in)
198624.2 mm (1.0 in)
198739.6 mm (1.6 in)
198845.2 mm (1.8 in)
198936.0 mm (1.4 in)
199051.8 mm (2.0 in)
199124.2 mm (1.0 in)
199256.4 mm (2.2 in)
199321.4 mm (0.8 in)
199429.0 mm (1.1 in)
199523.6 mm (0.9 in)
199638.0 mm (1.5 in)
199752.4 mm (2.1 in)
199851.0 mm (2.0 in)
199927.0 mm (1.1 in)
200056.8 mm (2.2 in)
200128.4 mm (1.1 in)
200223.2 mm (0.9 in)
200335.4 mm (1.4 in)
200450.4 mm (2.0 in)
200556.0 mm (2.2 in)
200631.0 mm (1.2 in)
200747.8 mm (1.9 in)
200819.2 mm (0.8 in)
200936.8 mm (1.4 in)
201094.6 mm (3.7 in)
201155.0 mm (2.2 in)
201226.0 mm (1.0 in)
201355.0 mm (2.2 in)
201460.1 mm (2.4 in)
201523.2 mm (0.9 in)
201658.7 mm (2.3 in)
201748.2 mm (1.9 in)
201831.4 mm (1.2 in)
201944.0 mm (1.7 in)
202035.2 mm (1.4 in)
202129.8 mm (1.2 in)
202253.0 mm (2.1 in)
202333.7 mm (1.3 in)
202427.4 mm (1.1 in)
202545.0 mm (1.8 in)
202647.8 mm (1.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Williamstown by year The wettest five days of the year at Williamstown, 1881 to 2026. The record is 178.6 mm (7.0 in) in 1889, marked on the chart; the median year is 60.9 mm (2.4 in). 0501001502001900192019401960198020002020Record: 178.6 mm (7.0 in) in 1889
The wettest five days of the year at Williamstown, 1881 to 2026. The record is 178.6 mm (7.0 in) in 1889, marked on the chart; the median year is 60.9 mm (2.4 in).
Wettest five days (Rx5day) at Williamstown by year
YearWettest five days (Rx5day)
18810.0 mm (0.00 in)
18820.0 mm (0.00 in)
188459.1 mm (2.3 in)
188591.3 mm (3.6 in)
188697.2 mm (3.8 in)
188765.5 mm (2.6 in)
188870.3 mm (2.8 in)
1889178.6 mm (7.0 in)
1890111.5 mm (4.4 in)
189191.7 mm (3.6 in)
189260.9 mm (2.4 in)
189399.9 mm (3.9 in)
189489.4 mm (3.5 in)
189571.6 mm (2.8 in)
189651.3 mm (2.0 in)
189760.7 mm (2.4 in)
1898135.1 mm (5.3 in)
189957.9 mm (2.3 in)
190082.3 mm (3.2 in)
190168.6 mm (2.7 in)
190276.1 mm (3.0 in)
190386.8 mm (3.4 in)
190472.8 mm (2.9 in)
190583.3 mm (3.3 in)
190677.2 mm (3.0 in)
190759.2 mm (2.3 in)
190893.3 mm (3.7 in)
190993.0 mm (3.7 in)
191093.4 mm (3.7 in)
191159.0 mm (2.3 in)
191260.3 mm (2.4 in)
191369.9 mm (2.8 in)
191442.4 mm (1.7 in)
1915110.8 mm (4.4 in)
1916126.0 mm (5.0 in)
191786.9 mm (3.4 in)
191841.2 mm (1.6 in)
191963.5 mm (2.5 in)
192055.6 mm (2.2 in)
192165.4 mm (2.6 in)
192280.2 mm (3.2 in)
1923106.1 mm (4.2 in)
192454.6 mm (2.1 in)
192590.5 mm (3.6 in)
192695.1 mm (3.7 in)
192752.1 mm (2.1 in)
192874.8 mm (2.9 in)
192960.6 mm (2.4 in)
193069.1 mm (2.7 in)
193184.5 mm (3.3 in)
1932117.8 mm (4.6 in)
193363.8 mm (2.5 in)
193463.3 mm (2.5 in)
193541.8 mm (1.6 in)
193645.0 mm (1.8 in)
193750.2 mm (2.0 in)
193876.4 mm (3.0 in)
193978.0 mm (3.1 in)
194055.4 mm (2.2 in)
1941117.7 mm (4.6 in)
194272.7 mm (2.9 in)
194368.2 mm (2.7 in)
194446.0 mm (1.8 in)
194552.3 mm (2.1 in)
194651.1 mm (2.0 in)
194758.7 mm (2.3 in)
1948106.2 mm (4.2 in)
194950.1 mm (2.0 in)
195064.2 mm (2.5 in)
195153.2 mm (2.1 in)
195252.7 mm (2.1 in)
195357.7 mm (2.3 in)
195436.3 mm (1.4 in)
195568.4 mm (2.7 in)
195690.7 mm (3.6 in)
195763.8 mm (2.5 in)
195852.4 mm (2.1 in)
195936.3 mm (1.4 in)
1960107.1 mm (4.2 in)
196157.0 mm (2.2 in)
196287.1 mm (3.4 in)
196342.5 mm (1.7 in)
196449.3 mm (1.9 in)
196542.9 mm (1.7 in)
196668.6 mm (2.7 in)
196733.8 mm (1.3 in)
196854.6 mm (2.1 in)
196936.3 mm (1.4 in)
197072.7 mm (2.9 in)
197150.0 mm (2.0 in)
197259.9 mm (2.4 in)
197391.7 mm (3.6 in)
1974118.6 mm (4.7 in)
197555.2 mm (2.2 in)
197640.0 mm (1.6 in)
197751.4 mm (2.0 in)
197843.2 mm (1.7 in)
197962.2 mm (2.4 in)
198054.6 mm (2.1 in)
1981119.0 mm (4.7 in)
198219.2 mm (0.8 in)
198369.6 mm (2.7 in)
198455.4 mm (2.2 in)
198558.2 mm (2.3 in)
198678.4 mm (3.1 in)
198761.8 mm (2.4 in)
198852.0 mm (2.0 in)
198957.6 mm (2.3 in)
199073.8 mm (2.9 in)
199146.4 mm (1.8 in)
199278.2 mm (3.1 in)
199336.2 mm (1.4 in)
199450.5 mm (2.0 in)
199550.8 mm (2.0 in)
199641.4 mm (1.6 in)
199755.2 mm (2.2 in)
199867.6 mm (2.7 in)
199937.2 mm (1.5 in)
200067.2 mm (2.6 in)
200150.6 mm (2.0 in)
200224.8 mm (1.0 in)
200368.8 mm (2.7 in)
200447.6 mm (1.9 in)
200579.0 mm (3.1 in)
200635.2 mm (1.4 in)
200755.6 mm (2.2 in)
200842.6 mm (1.7 in)
200949.4 mm (1.9 in)
201056.2 mm (2.2 in)
2011105.6 mm (4.2 in)
201235.0 mm (1.4 in)
201374.2 mm (2.9 in)
2014115.1 mm (4.5 in)
201547.6 mm (1.9 in)
201695.5 mm (3.8 in)
201760.8 mm (2.4 in)
201844.8 mm (1.8 in)
201956.8 mm (2.2 in)
202060.0 mm (2.4 in)
202172.6 mm (2.9 in)
202277.2 mm (3.0 in)
202359.1 mm (2.3 in)
202456.6 mm (2.2 in)
202580.6 mm (3.2 in)
202688.8 mm (3.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Williamstown by year The longest dry spell of the year at Williamstown, 1881 to 2026. The record is 89 days in 1893, marked on the chart; the median year is 32 days. 0204060801001900192019401960198020002020Record: 89 days in 1893
The longest dry spell of the year at Williamstown, 1881 to 2026. The record is 89 days in 1893, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Williamstown by year
YearLongest dry spell (CDD)
188128 days
188228 days
188427 days
188551 days
188657 days
188729 days
188834 days
188932 days
189028 days
189125 days
189230 days
189389 days
189461 days
189552 days
189637 days
189735 days
189839 days
189932 days
190029 days
190129 days
190230 days
190327 days
190458 days
190578 days
190658 days
190735 days
190832 days
190949 days
191055 days
191126 days
191233 days
191331 days
191436 days
191538 days
191633 days
191721 days
191832 days
191970 days
192049 days
192132 days
192243 days
192352 days
192420 days
192541 days
192638 days
192737 days
192829 days
192925 days
193039 days
193130 days
193227 days
193330 days
193467 days
193555 days
193638 days
193734 days
193824 days
193923 days
194027 days
194119 days
194232 days
194343 days
194432 days
194566 days
194627 days
194738 days
194836 days
194929 days
195034 days
195141 days
195257 days
195341 days
195444 days
195535 days
195624 days
195769 days
195848 days
195940 days
196038 days
196136 days
196232 days
196371 days
196446 days
196570 days
196629 days
196758 days
196828 days
196933 days
197053 days
197132 days
197247 days
197317 days
197434 days
197526 days
197623 days
197728 days
197822 days
197932 days
198040 days
198117 days
198223 days
198323 days
198432 days
198557 days
198657 days
198732 days
198831 days
198935 days
199022 days
199159 days
199220 days
199336 days
199433 days
199526 days
199622 days
199725 days
199825 days
199930 days
200031 days
200124 days
200262 days
200328 days
200444 days
200528 days
200632 days
200756 days
200845 days
200935 days
201022 days
201121 days
201224 days
201326 days
201429 days
201531 days
201632 days
201732 days
201820 days
201944 days
202022 days
202131 days
202225 days
202323 days
202450 days
202573 days
202642 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

107 years, 1884 to 2025

A day with at least 39.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 95.6 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Williamstown: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years39.3 mm (1.5 in)
5 years53.0 mm (2.1 in)
10 years62.5 mm (2.5 in)
25 years75.3 mm (3.0 in)
50 years85.2 mm (3.4 in)
100 years95.6 mm (3.8 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 107 years of values from 1884 to 2025.

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: 123.7 mm (4.9 in) in 1889; 96.0 mm (3.8 in) in 1932; 84.1 mm (3.3 in) in 1948.

Download the Data

  • Data for Williamstown standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Williamstown 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-12).