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Built 2026-10-15 (15 October 2026)

Mosman Water Supply Weather Records (ASN00066041)

Record envelope, standing records and threshold days for Mosman Water Supply (ASN00066041), Australia, with 63 years of record.

Key Facts for Mosman Water Supply

  • Mosman Water Supply (ASN00066041) is a weather station in Australia at -33.83 latitude and 151.25 longitude, 85 m (280 ft) above sea level.
  • The station reports from 1904 to 1966, 63 years of record.
  • 0 records set at Mosman Water Supply still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Mosman Water Supply set a daily record precipitation of 59.7 mm (2.4 in) on 16 December 1963.

About the Station

  • Location: Australia, -33.83 latitude, 151.25 longitude.
  • Elevation: 85 m (280 ft).
  • Period of record: 1904 to 1966, 63 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

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

All-Time Record Progression

3 new records
When Mosman Water Supply set new all-time records 3 all-time records were set at Mosman Water Supply between 1 May 1955 and 29 March 1957. Each dot is a new record. Record daily precipitation1 May 1955: Record daily precipitation 162.1 mm (6.4 in)10 February 1956: Record daily precipitation 181.4 mm (7.1 in)29 March 1957: Record daily precipitation 184.9 mm (7.3 in)1955
3 all-time records were set at Mosman Water Supply between 1 May 1955 and 29 March 1957. Each dot is a new record.
When Mosman Water Supply set new all-time records
DateKindDetail
1955-05-01Record daily precipitationRecord daily precipitation 162.1 mm (6.4 in)
1956-02-10Record daily precipitationRecord daily precipitation 181.4 mm (7.1 in)
1957-03-29Record daily precipitationRecord daily precipitation 184.9 mm (7.3 in)

Wettest Day of Each Month

Mar: 184.9 mm (7.3 in)
Record daily precipitation for each month at Mosman Water Supply The wettest day on record for each calendar month at Mosman Water Supply. The most was 184.9 mm (7.3 in) on 29 March 1957. 050100150200 Jan: 138.4 mm (5.4 in), 13 January 1911 Jan Feb: 181.4 mm (7.1 in), 10 February 1956 Feb Mar: 184.9 mm (7.3 in), 29 March 1957 Mar Apr: 104.1 mm (4.1 in), 7 April 1915 Apr May: 162.1 mm (6.4 in), 1 May 1955 May Jun: 99.1 mm (3.9 in), 15 June 1950 Jun Jul: 139.7 mm (5.5 in), 26 July 1952 Jul Aug: 120.7 mm (4.8 in), 28 August 1961 Aug Sep: 76.2 mm (3.0 in), 25 September 1949 Sep Oct: 124.5 mm (4.9 in), 22 October 1960 Oct Nov: 144.0 mm (5.7 in), 18 November 1961 Nov Dec: 140.0 mm (5.5 in), 13 December 1910 Dec
The wettest day on record for each calendar month at Mosman Water Supply. The most was 184.9 mm (7.3 in) on 29 March 1957.
Record daily precipitation for each month at Mosman Water Supply
MonthRecord daily precipitation (mm)Date
Jan138.4 mm (5.4 in)13 January 1911
Feb181.4 mm (7.1 in)10 February 1956
Mar184.9 mm (7.3 in)29 March 1957
Apr104.1 mm (4.1 in)7 April 1915
May162.1 mm (6.4 in)1 May 1955
Jun99.1 mm (3.9 in)15 June 1950
Jul139.7 mm (5.5 in)26 July 1952
Aug120.7 mm (4.8 in)28 August 1961
Sep76.2 mm (3.0 in)25 September 1949
Oct124.5 mm (4.9 in)22 October 1960
Nov144.0 mm (5.7 in)18 November 1961
Dec140.0 mm (5.5 in)13 December 1910

Latest Records

20
Latest records at Mosman Water Supply
DateStationRecordValueBeat old record byOld record stoodSignificance
16 December 1963Mosman Water Supply, AUdaily rain59.7 mm (2.4 in)24.1 mm (0.9 in)2 years21 of 100 (Routine)
9 December 1963Mosman Water Supply, AUdaily rain91.7 mm (3.6 in)47.2 mm (1.9 in)42 years48 of 100 (Notable)
14 October 1963Mosman Water Supply, AUdaily rain30.5 mm (1.2 in)21.4 mm (0.8 in)58 years38 of 100 (Notable)
30 August 1963Mosman Water Supply, AUdaily rain106.7 mm (4.2 in)93.2 mm (3.7 in)41 years58 of 100 (Notable)
29 August 1963Mosman Water Supply, AUdaily rain34.0 mm (1.3 in)14.9 mm (0.6 in)12 years18 of 100 (Routine)
5 June 1963Mosman Water Supply, AUdaily rain88.4 mm (3.5 in)56.4 mm (2.2 in)1 year37 of 100 (Notable)
20 May 1963Mosman Water Supply, AUdaily rain87.6 mm (3.4 in)24.1 mm (0.9 in)16 years22 of 100 (Routine)
7 May 1963Mosman Water Supply, AUdaily rain74.9 mm (2.9 in)18.3 mm (0.7 in)9 years16 of 100 (Routine)
29 April 1963Mosman Water Supply, AUdaily rain86.4 mm (3.4 in)77.0 mm (3.0 in)40 years58 of 100 (Notable)
28 April 1963Mosman Water Supply, AUdaily rain61.2 mm (2.4 in)45.5 mm (1.8 in)40 years47 of 100 (Notable)
23 March 1963Mosman Water Supply, AUdaily rain95.3 mm (3.8 in)22.9 mm (0.9 in)48 years31 of 100 (Routine)
12 March 1963Mosman Water Supply, AUdaily rain35.6 mm (1.4 in)0.3 mm (0.01 in)13 years10 of 100 (Routine)
12 February 1963Mosman Water Supply, AUdaily rain38.1 mm (1.5 in)14.0 mm (0.6 in)16 years18 of 100 (Routine)
17 January 1963Mosman Water Supply, AUdaily rain22.9 mm (0.9 in)3.6 mm (0.14 in)4 years9 of 100 (Routine)
25 December 1962Mosman Water Supply, AUdaily rain27.9 mm (1.1 in)4.3 mm (0.17 in)15 years11 of 100 (Routine)
15 December 1962Mosman Water Supply, AUdaily rain24.1 mm (0.9 in)8.4 mm (0.33 in)15 years14 of 100 (Routine)
21 September 1962Mosman Water Supply, AUdaily rain25.4 mm (1.0 in)16.0 mm (0.6 in)5 years24 of 100 (Routine)
9 August 1962Mosman Water Supply, AUdaily rain23.1 mm (0.9 in)4.0 mm (0.16 in)53 years20 of 100 (Routine)
7 July 1962Mosman Water Supply, AUdaily rain4.8 mm (0.19 in)1.8 mm (0.07 in)17 years10 of 100 (Routine)
14 May 1962Mosman Water Supply, AUdaily rain94.7 mm (3.7 in)62.9 mm (2.5 in)48 years49 of 100 (Notable)

Extremes by Year

1904 to 1966
Yearly extremes at Mosman Water Supply: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)184.9 mm (7.3 in)1957108.0 mm (4.3 in)41
Wettest five days (Rx5day)402.0 mm (15.8 in)1961197.9 mm (7.8 in)41
Longest dry spell (CDD)57 days194621 days41

Wettest day (Rx1day)

Wettest day (Rx1day) at Mosman Water Supply by year The wettest day of the year at Mosman Water Supply, 1904 to 1966. The record is 184.9 mm (7.3 in) in 1957, marked on the chart; the median year is 108.0 mm (4.3 in). 050100150200192019401960Record: 184.9 mm (7.3 in) in 1957
The wettest day of the year at Mosman Water Supply, 1904 to 1966. The record is 184.9 mm (7.3 in) in 1957, marked on the chart; the median year is 108.0 mm (4.3 in).
Wettest day (Rx1day) at Mosman Water Supply by year
YearWettest day (Rx1day)
1904128.5 mm (5.1 in)
190586.4 mm (3.4 in)
190691.4 mm (3.6 in)
190782.8 mm (3.3 in)
1908131.8 mm (5.2 in)
190958.4 mm (2.3 in)
1910140.0 mm (5.5 in)
1911138.4 mm (5.4 in)
1912111.0 mm (4.4 in)
1913137.2 mm (5.4 in)
191474.2 mm (2.9 in)
1915104.1 mm (4.1 in)
191691.4 mm (3.6 in)
191982.6 mm (3.3 in)
192094.0 mm (3.7 in)
1921109.2 mm (4.3 in)
1922116.3 mm (4.6 in)
192369.9 mm (2.8 in)
192452.1 mm (2.1 in)
1925124.2 mm (4.9 in)
194490.4 mm (3.6 in)
1945101.6 mm (4.0 in)
194691.4 mm (3.6 in)
194777.2 mm (3.0 in)
194880.3 mm (3.2 in)
1949136.1 mm (5.4 in)
1950114.6 mm (4.5 in)
1951108.0 mm (4.3 in)
1952139.7 mm (5.5 in)
1953140.2 mm (5.5 in)
1954139.2 mm (5.5 in)
1955162.1 mm (6.4 in)
1956181.4 mm (7.1 in)
1957184.9 mm (7.3 in)
1958103.4 mm (4.1 in)
1959112.5 mm (4.4 in)
1960124.5 mm (4.9 in)
1961144.0 mm (5.7 in)
196294.7 mm (3.7 in)
1963106.7 mm (4.2 in)
19660.0 mm (0.00 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Mosman Water Supply by year The wettest five days of the year at Mosman Water Supply, 1904 to 1966. The record is 402.0 mm (15.8 in) in 1961, marked on the chart; the median year is 197.9 mm (7.8 in). 0200400600192019401960Record: 402.0 mm (15.8 in) in 1961
The wettest five days of the year at Mosman Water Supply, 1904 to 1966. The record is 402.0 mm (15.8 in) in 1961, marked on the chart; the median year is 197.9 mm (7.8 in).
Wettest five days (Rx5day) at Mosman Water Supply by year
YearWettest five days (Rx5day)
1904242.6 mm (9.6 in)
1905122.6 mm (4.8 in)
1906129.9 mm (5.1 in)
1907165.4 mm (6.5 in)
1908249.9 mm (9.8 in)
1909136.4 mm (5.4 in)
1910238.9 mm (9.4 in)
1911199.5 mm (7.9 in)
1912197.4 mm (7.8 in)
1913186.0 mm (7.3 in)
1914188.8 mm (7.4 in)
1915258.2 mm (10.2 in)
1916214.6 mm (8.4 in)
1919164.2 mm (6.5 in)
1920278.2 mm (11.0 in)
1921118.1 mm (4.6 in)
1922194.0 mm (7.6 in)
1923130.0 mm (5.1 in)
1924122.2 mm (4.8 in)
1925199.1 mm (7.8 in)
1944110.5 mm (4.4 in)
1945201.1 mm (7.9 in)
1946211.9 mm (8.3 in)
1947137.6 mm (5.4 in)
1948136.4 mm (5.4 in)
1949269.7 mm (10.6 in)
1950335.4 mm (13.2 in)
1951168.2 mm (6.6 in)
1952188.2 mm (7.4 in)
1953205.4 mm (8.1 in)
1954169.4 mm (6.7 in)
1955197.9 mm (7.8 in)
1956317.0 mm (12.5 in)
1957202.9 mm (8.0 in)
1958255.8 mm (10.1 in)
1959141.2 mm (5.6 in)
1960219.8 mm (8.7 in)
1961402.0 mm (15.8 in)
1962249.4 mm (9.8 in)
1963210.6 mm (8.3 in)
19660.0 mm (0.00 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Mosman Water Supply by year The longest dry spell of the year at Mosman Water Supply, 1904 to 1966. The record is 57 days in 1946, marked on the chart; the median year is 21 days. 0204060192019401960Record: 57 days in 1946
The longest dry spell of the year at Mosman Water Supply, 1904 to 1966. The record is 57 days in 1946, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Mosman Water Supply by year
YearLongest dry spell (CDD)
190421 days
190520 days
190622 days
190719 days
190813 days
190916 days
191030 days
191121 days
191231 days
191326 days
191415 days
191525 days
191618 days
191918 days
192026 days
192118 days
192220 days
192320 days
192415 days
192513 days
194420 days
194527 days
194657 days
194720 days
194827 days
194917 days
195014 days
195129 days
195234 days
195322 days
195421 days
195516 days
195621 days
195727 days
195822 days
195910 days
196017 days
196124 days
196225 days
196323 days
196631 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

37 years, 1905 to 1963

A day with at least 108.9 mm (4.3 in) of rain is expected about once in 2 years. A day with at least 194.3 mm (7.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Mosman Water Supply: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years108.9 mm (4.3 in)
5 years137.4 mm (5.4 in)
10 years153.7 mm (6.1 in)
25 years171.9 mm (6.8 in)
50 years183.7 mm (7.2 in)Longer than the 37 years of record
100 years194.3 mm (7.6 in)Longer than the 37 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, 37 years of values from 1905 to 1963.

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: 184.9 mm (7.3 in) in 1957; 181.4 mm (7.1 in) in 1956; 162.1 mm (6.4 in) in 1955.

Download the Data

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