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Casterton Post Office Weather Records (ASN00090018)

Record envelope, standing records and threshold days for Casterton Post Office (ASN00090018), Australia, with 59 years of record.

Key Facts for Casterton Post Office

  • Casterton Post Office (ASN00090018) is a weather station in Australia at -37.27 latitude and 141.40 longitude, 48 m (158 ft) above sea level.
  • The station reports from 1899 to 1957, 59 years of record.
  • 0 records set at Casterton Post Office still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Casterton Post Office set a daily record precipitation of 9.4 mm (0.37 in) on 14 March 1957.

About the Station

  • Location: Australia, -37.27 latitude, 141.40 longitude.
  • Elevation: 48 m (158 ft).
  • Period of record: 1899 to 1957, 59 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

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

Wettest Day of Each Month

Mar: 91.4 mm (3.6 in)
Record daily precipitation for each month at Casterton Post Office The wettest day on record for each calendar month at Casterton Post Office. The most was 91.4 mm (3.6 in) on 6 March 1910. 0255075100 Jan: 46.5 mm (1.8 in), 25 January 1941 Jan Feb: 66.8 mm (2.6 in), 19 February 1924 Feb Mar: 91.4 mm (3.6 in), 6 March 1910 Mar Apr: 48.5 mm (1.9 in), 3 April 1934 Apr May: 37.1 mm (1.5 in), 30 May 1923 May Jun: 40.1 mm (1.6 in), 21 June 1908 Jun Jul: 31.8 mm (1.3 in), 8 July 1910 Jul Aug: 35.6 mm (1.4 in), 24 August 1936 Aug Sep: 34.0 mm (1.3 in), 10 September 1910 Sep Oct: 51.8 mm (2.0 in), 11 October 1948 Oct Nov: 48.3 mm (1.9 in), 8 November 1934 Nov Dec: 54.1 mm (2.1 in), 17 December 1902 Dec
The wettest day on record for each calendar month at Casterton Post Office. The most was 91.4 mm (3.6 in) on 6 March 1910.
Record daily precipitation for each month at Casterton Post Office
MonthRecord daily precipitation (mm)Date
Jan46.5 mm (1.8 in)25 January 1941
Feb66.8 mm (2.6 in)19 February 1924
Mar91.4 mm (3.6 in)6 March 1910
Apr48.5 mm (1.9 in)3 April 1934
May37.1 mm (1.5 in)30 May 1923
Jun40.1 mm (1.6 in)21 June 1908
Jul31.8 mm (1.3 in)8 July 1910
Aug35.6 mm (1.4 in)24 August 1936
Sep34.0 mm (1.3 in)10 September 1910
Oct51.8 mm (2.0 in)11 October 1948
Nov48.3 mm (1.9 in)8 November 1934
Dec54.1 mm (2.1 in)17 December 1902

Latest Records

20
Latest records at Casterton Post Office
DateStationRecordValueBeat old record byOld record stoodSignificance
14 March 1957Casterton Post Office, AUdaily rain9.4 mm (0.37 in)1.0 mm (0.04 in)51 years20 of 100 (Routine)
8 March 1957Casterton Post Office, AUdaily rain19.6 mm (0.8 in)12.5 mm (0.5 in)54 years20 of 100 (Routine)
6 February 1957Casterton Post Office, AUdaily rain36.3 mm (1.4 in)26.1 mm (1.0 in)50 years51 of 100 (Notable)
18 October 1956Casterton Post Office, AUdaily rain16.8 mm (0.7 in)3.3 mm (0.13 in)20 years16 of 100 (Routine)
22 August 1956Casterton Post Office, AUdaily rain18.8 mm (0.7 in)3.3 mm (0.13 in)13 years15 of 100 (Routine)
10 August 1956Casterton Post Office, AUdaily rain27.9 mm (1.1 in)17.0 mm (0.7 in)29 years51 of 100 (Notable)
29 June 1956Casterton Post Office, AUdaily rain27.2 mm (1.1 in)9.9 mm (0.39 in)20 years30 of 100 (Routine)
10 April 1956Casterton Post Office, AUdaily rain22.9 mm (0.9 in)8.4 mm (0.33 in)41 years20 of 100 (Routine)
31 March 1956Casterton Post Office, AUdaily rain (Tie)16.5 mm (0.6 in)tie35 years3 of 100 (Routine)
25 August 1955Casterton Post Office, AUdaily rain18.3 mm (0.7 in)3.3 mm (0.13 in)48 years20 of 100 (Routine)
17 June 1955Casterton Post Office, AUdaily rain11.2 mm (0.4 in)0.5 mm (0.02 in)48 years19 of 100 (Routine)
17 May 1955Casterton Post Office, AUdaily rain22.4 mm (0.9 in)3.1 mm (0.12 in)54 years20 of 100 (Routine)
6 May 1955Casterton Post Office, AUdaily rain17.0 mm (0.7 in)1.0 mm (0.04 in)12 years9 of 100 (Routine)
10 February 1955Casterton Post Office, AUdaily rain10.4 mm (0.4 in)5.1 mm (0.20 in)39 years20 of 100 (Routine)
7 August 1954Casterton Post Office, AUdaily rain11.9 mm (0.5 in)0.5 mm (0.02 in)27 years14 of 100 (Routine)
15 June 1954Casterton Post Office, AUdaily rain16.5 mm (0.6 in)1.0 mm (0.04 in)23 years12 of 100 (Routine)
2 June 1954Casterton Post Office, AUdaily rain23.6 mm (0.9 in)13.7 mm (0.5 in)1 year20 of 100 (Routine)
14 April 1954Casterton Post Office, AUdaily rain38.9 mm (1.5 in)22.1 mm (0.9 in)23 years51 of 100 (Notable)
22 March 1954Casterton Post Office, AUdaily rain13.7 mm (0.5 in)1.0 mm (0.04 in)19 years11 of 100 (Routine)
31 December 1953Casterton Post Office, AUdaily rain7.9 mm (0.31 in)0.8 mm (0.03 in)52 years20 of 100 (Routine)

Extremes by Year

1899 to 1957
Yearly extremes at Casterton Post Office: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)91.4 mm (3.6 in)191034.0 mm (1.3 in)59
Wettest five days (Rx5day)159.5 mm (6.3 in)194657.1 mm (2.2 in)59
Longest dry spell (CDD)52 days194824 days59

Wettest day (Rx1day)

Wettest day (Rx1day) at Casterton Post Office by year The wettest day of the year at Casterton Post Office, 1899 to 1957. The record is 91.4 mm (3.6 in) in 1910, marked on the chart; the median year is 34.0 mm (1.3 in). 020406080100190019101920193019401950Record: 91.4 mm (3.6 in) in 1910
The wettest day of the year at Casterton Post Office, 1899 to 1957. The record is 91.4 mm (3.6 in) in 1910, marked on the chart; the median year is 34.0 mm (1.3 in).
Wettest day (Rx1day) at Casterton Post Office by year
YearWettest day (Rx1day)
189915.2 mm (0.6 in)
190075.4 mm (3.0 in)
190123.4 mm (0.9 in)
190254.1 mm (2.1 in)
190326.9 mm (1.1 in)
190425.4 mm (1.0 in)
190525.7 mm (1.0 in)
190640.6 mm (1.6 in)
190725.7 mm (1.0 in)
190840.1 mm (1.6 in)
190934.0 mm (1.3 in)
191091.4 mm (3.6 in)
191146.7 mm (1.8 in)
191220.6 mm (0.8 in)
191334.5 mm (1.4 in)
191419.1 mm (0.8 in)
191538.6 mm (1.5 in)
191632.0 mm (1.3 in)
191732.3 mm (1.3 in)
191834.0 mm (1.3 in)
191924.9 mm (1.0 in)
192025.1 mm (1.0 in)
192130.7 mm (1.2 in)
192221.6 mm (0.9 in)
192337.1 mm (1.5 in)
192466.8 mm (2.6 in)
192535.1 mm (1.4 in)
192631.8 mm (1.3 in)
192726.2 mm (1.0 in)
192840.6 mm (1.6 in)
192934.0 mm (1.3 in)
193048.8 mm (1.9 in)
193118.5 mm (0.7 in)
193265.0 mm (2.6 in)
193342.4 mm (1.7 in)
193448.5 mm (1.9 in)
193547.8 mm (1.9 in)
193646.0 mm (1.8 in)
193729.7 mm (1.2 in)
193846.0 mm (1.8 in)
193924.9 mm (1.0 in)
194016.3 mm (0.6 in)
194148.8 mm (1.9 in)
194227.4 mm (1.1 in)
194321.1 mm (0.8 in)
194429.0 mm (1.1 in)
194540.9 mm (1.6 in)
194676.5 mm (3.0 in)
194733.0 mm (1.3 in)
194851.8 mm (2.0 in)
194922.1 mm (0.9 in)
195019.3 mm (0.8 in)
195139.4 mm (1.6 in)
195243.9 mm (1.7 in)
195328.4 mm (1.1 in)
195438.9 mm (1.5 in)
195522.4 mm (0.9 in)
195627.9 mm (1.1 in)
195736.3 mm (1.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Casterton Post Office by year The wettest five days of the year at Casterton Post Office, 1899 to 1957. The record is 159.5 mm (6.3 in) in 1946, marked on the chart; the median year is 57.1 mm (2.2 in). 050100150200190019101920193019401950Record: 159.5 mm (6.3 in) in 1946
The wettest five days of the year at Casterton Post Office, 1899 to 1957. The record is 159.5 mm (6.3 in) in 1946, marked on the chart; the median year is 57.1 mm (2.2 in).
Wettest five days (Rx5day) at Casterton Post Office by year
YearWettest five days (Rx5day)
189932.3 mm (1.3 in)
190089.4 mm (3.5 in)
190151.8 mm (2.0 in)
190285.1 mm (3.4 in)
190351.3 mm (2.0 in)
190447.1 mm (1.9 in)
190562.0 mm (2.4 in)
190657.6 mm (2.3 in)
190762.8 mm (2.5 in)
190874.4 mm (2.9 in)
190964.3 mm (2.5 in)
1910133.9 mm (5.3 in)
1911122.9 mm (4.8 in)
191268.9 mm (2.7 in)
191342.9 mm (1.7 in)
191438.8 mm (1.5 in)
191560.9 mm (2.4 in)
191654.9 mm (2.2 in)
191756.3 mm (2.2 in)
191855.7 mm (2.2 in)
191954.6 mm (2.1 in)
192054.6 mm (2.1 in)
192145.7 mm (1.8 in)
192245.5 mm (1.8 in)
192354.6 mm (2.1 in)
1924104.6 mm (4.1 in)
192561.6 mm (2.4 in)
192651.4 mm (2.0 in)
192766.8 mm (2.6 in)
192887.9 mm (3.5 in)
192947.7 mm (1.9 in)
193069.7 mm (2.7 in)
193153.5 mm (2.1 in)
1932100.3 mm (3.9 in)
193385.0 mm (3.3 in)
193474.0 mm (2.9 in)
193573.5 mm (2.9 in)
193671.5 mm (2.8 in)
193749.3 mm (1.9 in)
193855.9 mm (2.2 in)
193953.2 mm (2.1 in)
194036.0 mm (1.4 in)
194174.4 mm (2.9 in)
194258.7 mm (2.3 in)
194351.6 mm (2.0 in)
194445.2 mm (1.8 in)
194575.4 mm (3.0 in)
1946159.5 mm (6.3 in)
194779.2 mm (3.1 in)
194870.8 mm (2.8 in)
194935.7 mm (1.4 in)
195038.9 mm (1.5 in)
195183.6 mm (3.3 in)
195257.1 mm (2.2 in)
195358.2 mm (2.3 in)
195446.5 mm (1.8 in)
195550.0 mm (2.0 in)
195651.6 mm (2.0 in)
195736.6 mm (1.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Casterton Post Office by year The longest dry spell of the year at Casterton Post Office, 1899 to 1957. The record is 52 days in 1948, marked on the chart; the median year is 24 days. 102030405060190019101920193019401950Record: 52 days in 1948
The longest dry spell of the year at Casterton Post Office, 1899 to 1957. The record is 52 days in 1948, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Casterton Post Office by year
YearLongest dry spell (CDD)
189914 days
190013 days
190129 days
190218 days
190314 days
190433 days
190524 days
190641 days
190716 days
190815 days
190936 days
191025 days
191119 days
191226 days
191327 days
191435 days
191532 days
191642 days
191723 days
191823 days
191921 days
192019 days
192123 days
192231 days
192341 days
192423 days
192521 days
192621 days
192720 days
192832 days
192920 days
193040 days
193118 days
193223 days
193323 days
193420 days
193522 days
193644 days
193721 days
193817 days
193923 days
194022 days
194127 days
194220 days
194332 days
194426 days
194526 days
194614 days
194720 days
194852 days
194928 days
195025 days
195139 days
195224 days
195336 days
195434 days
195529 days
195644 days
195736 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

55 years, 1900 to 1954

A day with at least 33.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 94.1 mm (3.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Casterton Post Office: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years33.8 mm (1.3 in)
5 years47.2 mm (1.9 in)
10 years57.1 mm (2.2 in)
25 years70.9 mm (2.8 in)
50 years82.1 mm (3.2 in)
100 years94.1 mm (3.7 in)Longer than the 55 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, 55 years of values from 1900 to 1954.

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: 91.4 mm (3.6 in) in 1910; 76.5 mm (3.0 in) in 1946; 75.4 mm (3.0 in) in 1900.

Download the Data

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