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

Whyalla (Tregalana) Weather Records (ASN00018085)

Record envelope, standing records and threshold days for Whyalla (Tregalana) (ASN00018085), Australia, with 78 years of record.

Key Facts for Whyalla (Tregalana)

  • Whyalla (Tregalana) (ASN00018085) is a weather station in Australia at -32.88 latitude and 137.56 longitude, 20 m (66 ft) above sea level.
  • The station reports from 1930 to 2007, 78 years of record.
  • 0 records set at Whyalla (Tregalana) still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Whyalla (Tregalana) set a daily record precipitation of 10.0 mm (0.4 in) on 28 June 2007.

About the Station

  • Location: Australia, -32.88 latitude, 137.56 longitude.
  • Elevation: 20 m (66 ft).
  • Period of record: 1930 to 2007, 78 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

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

Wettest Day of Each Month

Mar: 139.7 mm (5.5 in)
Record daily precipitation for each month at Whyalla (Tregalana) The wettest day on record for each calendar month at Whyalla (Tregalana). The most was 139.7 mm (5.5 in) on 28 March 1947. 050100150 Jan: 60.0 mm (2.4 in), 20 January 2007 Jan Feb: 131.8 mm (5.2 in), 18 February 1946 Feb Mar: 139.7 mm (5.5 in), 28 March 1947 Mar Apr: 39.9 mm (1.6 in), 14 April 1954 Apr May: 50.0 mm (2.0 in), 15 May 1974 May Jun: 36.8 mm (1.4 in), 18 June 1957 Jun Jul: 23.0 mm (0.9 in), 30 July 1983 Jul Aug: 38.9 mm (1.5 in), 26 August 1973 Aug Sep: 38.0 mm (1.5 in), 20 September 1997 Sep Oct: 51.5 mm (2.0 in), 31 October 1997 Oct Nov: 41.4 mm (1.6 in), 15 November 1961 Nov Dec: 67.3 mm (2.6 in), 25 December 1946 Dec
The wettest day on record for each calendar month at Whyalla (Tregalana). The most was 139.7 mm (5.5 in) on 28 March 1947.
Record daily precipitation for each month at Whyalla (Tregalana)
MonthRecord daily precipitation (mm)Date
Jan60.0 mm (2.4 in)20 January 2007
Feb131.8 mm (5.2 in)18 February 1946
Mar139.7 mm (5.5 in)28 March 1947
Apr39.9 mm (1.6 in)14 April 1954
May50.0 mm (2.0 in)15 May 1974
Jun36.8 mm (1.4 in)18 June 1957
Jul23.0 mm (0.9 in)30 July 1983
Aug38.9 mm (1.5 in)26 August 1973
Sep38.0 mm (1.5 in)20 September 1997
Oct51.5 mm (2.0 in)31 October 1997
Nov41.4 mm (1.6 in)15 November 1961
Dec67.3 mm (2.6 in)25 December 1946

Latest Records

20
Latest records at Whyalla (Tregalana)
DateStationRecordValueBeat old record byOld record stoodSignificance
28 June 2007Whyalla (Tregalana), AUdaily rain10.0 mm (0.4 in)2.3 mm (0.09 in)32 years20 of 100 (Routine)
17 May 2007Whyalla (Tregalana), AUdaily rain8.2 mm (0.32 in)1.8 mm (0.07 in)60 years20 of 100 (Routine)
26 April 2007Whyalla (Tregalana), AUdaily rain21.0 mm (0.8 in)12.9 mm (0.5 in)44 years20 of 100 (Routine)
24 March 2007Whyalla (Tregalana), AUdaily rain10.0 mm (0.4 in)2.9 mm (0.11 in)37 years19 of 100 (Routine)
20 January 2007Whyalla (Tregalana), AUmonthly rain60.0 mm (2.4 in)4.8 mm (0.19 in)32 years31 of 100 (Routine)
19 January 2007Whyalla (Tregalana), AUdaily rain48.0 mm (1.9 in)41.6 mm (1.6 in)60 years65 of 100 (Major)
7 May 2006Whyalla (Tregalana), AUdaily rain4.4 mm (0.17 in)2.9 mm (0.11 in)60 years20 of 100 (Routine)
28 April 2006Whyalla (Tregalana), AUdaily rain20.0 mm (0.8 in)14.2 mm (0.6 in)43 years20 of 100 (Routine)
13 March 2006Whyalla (Tregalana), AUdaily rain6.6 mm (0.26 in)1.2 mm (0.05 in)8 years9 of 100 (Routine)
16 December 2005Whyalla (Tregalana), AUdaily rain17.0 mm (0.7 in)13.7 mm (0.5 in)56 years20 of 100 (Routine)
7 November 2005Whyalla (Tregalana), AUdaily rain9.0 mm (0.35 in)3.7 mm (0.15 in)39 years20 of 100 (Routine)
20 October 2005Whyalla (Tregalana), AUdaily rain10.2 mm (0.4 in)2.6 mm (0.10 in)52 years20 of 100 (Routine)
19 October 2005Whyalla (Tregalana), AUdaily rain22.0 mm (0.9 in)5.5 mm (0.22 in)43 years20 of 100 (Routine)
4 September 2005Whyalla (Tregalana), AUdaily rain11.0 mm (0.4 in)6.2 mm (0.24 in)47 years20 of 100 (Routine)
3 September 2005Whyalla (Tregalana), AUdaily rain16.6 mm (0.7 in)5.4 mm (0.21 in)20 years20 of 100 (Routine)
9 July 2005Whyalla (Tregalana), AUdaily rain4.6 mm (0.18 in)1.6 mm (0.06 in)44 years20 of 100 (Routine)
19 June 2005Whyalla (Tregalana), AUdaily rain17.0 mm (0.7 in)6.1 mm (0.24 in)60 years20 of 100 (Routine)
9 December 2004Whyalla (Tregalana), AUdaily rain3.6 mm (0.14 in)3.6 mm (0.14 in)73 years20 of 100 (Routine)
4 November 2004Whyalla (Tregalana), AUdaily rain6.0 mm (0.24 in)0.2 mm (0.01 in)46 years20 of 100 (Routine)
8 September 2004Whyalla (Tregalana), AUdaily rain3.0 mm (0.12 in)0.2 mm (0.01 in)55 years20 of 100 (Routine)

Extremes by Year

1930 to 2007
Yearly extremes at Whyalla (Tregalana): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)139.7 mm (5.5 in)194726.0 mm (1.0 in)59
Wettest five days (Rx5day)172.4 mm (6.8 in)194629.7 mm (1.2 in)59
Longest dry spell (CDD)124 days200245 days59

Wettest day (Rx1day)

Wettest day (Rx1day) at Whyalla (Tregalana) by year The wettest day of the year at Whyalla (Tregalana), 1930 to 2007. The record is 139.7 mm (5.5 in) in 1947, marked on the chart; the median year is 26.0 mm (1.0 in). 0501001501940196019802000Record: 139.7 mm (5.5 in) in 1947
The wettest day of the year at Whyalla (Tregalana), 1930 to 2007. The record is 139.7 mm (5.5 in) in 1947, marked on the chart; the median year is 26.0 mm (1.0 in).
Wettest day (Rx1day) at Whyalla (Tregalana) by year
YearWettest day (Rx1day)
19300.0 mm (0.00 in)
19310.0 mm (0.00 in)
19320.0 mm (0.00 in)
19330.0 mm (0.00 in)
19350.0 mm (0.00 in)
19360.0 mm (0.00 in)
19380.0 mm (0.00 in)
193912.2 mm (0.5 in)
194021.1 mm (0.8 in)
194133.3 mm (1.3 in)
194238.6 mm (1.5 in)
194317.3 mm (0.7 in)
194435.1 mm (1.4 in)
194527.9 mm (1.1 in)
1946131.8 mm (5.2 in)
1947139.7 mm (5.5 in)
194820.3 mm (0.8 in)
194930.5 mm (1.2 in)
195043.2 mm (1.7 in)
195136.6 mm (1.4 in)
195238.1 mm (1.5 in)
195323.4 mm (0.9 in)
195439.9 mm (1.6 in)
195526.2 mm (1.0 in)
195619.1 mm (0.8 in)
195736.8 mm (1.4 in)
195825.4 mm (1.0 in)
195914.7 mm (0.6 in)
196032.3 mm (1.3 in)
196141.4 mm (1.6 in)
196229.2 mm (1.1 in)
196334.3 mm (1.4 in)
196428.4 mm (1.1 in)
196513.0 mm (0.5 in)
196629.0 mm (1.1 in)
196733.3 mm (1.3 in)
196819.3 mm (0.8 in)
196919.8 mm (0.8 in)
197016.8 mm (0.7 in)
197121.6 mm (0.9 in)
197227.9 mm (1.1 in)
197347.0 mm (1.9 in)
197469.0 mm (2.7 in)
197532.2 mm (1.3 in)
19768.0 mm (0.31 in)
198333.5 mm (1.3 in)
198426.0 mm (1.0 in)
198516.8 mm (0.7 in)
19860.0 mm (0.00 in)
199751.5 mm (2.0 in)
199827.0 mm (1.1 in)
199960.0 mm (2.4 in)
200120.0 mm (0.8 in)
200223.0 mm (0.9 in)
200323.2 mm (0.9 in)
200417.0 mm (0.7 in)
200522.0 mm (0.9 in)
200623.0 mm (0.9 in)
200760.0 mm (2.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Whyalla (Tregalana) by year The wettest five days of the year at Whyalla (Tregalana), 1930 to 2007. The record is 172.4 mm (6.8 in) in 1946, marked on the chart; the median year is 29.7 mm (1.2 in). 0501001502001940196019802000Record: 172.4 mm (6.8 in) in 1946
The wettest five days of the year at Whyalla (Tregalana), 1930 to 2007. The record is 172.4 mm (6.8 in) in 1946, marked on the chart; the median year is 29.7 mm (1.2 in).
Wettest five days (Rx5day) at Whyalla (Tregalana) by year
YearWettest five days (Rx5day)
19300.0 mm (0.00 in)
19310.0 mm (0.00 in)
19320.0 mm (0.00 in)
19330.0 mm (0.00 in)
19350.0 mm (0.00 in)
19360.0 mm (0.00 in)
19380.0 mm (0.00 in)
193917.0 mm (0.7 in)
194021.1 mm (0.8 in)
194153.4 mm (2.1 in)
194242.4 mm (1.7 in)
194318.1 mm (0.7 in)
194435.1 mm (1.4 in)
194527.9 mm (1.1 in)
1946172.4 mm (6.8 in)
1947139.7 mm (5.5 in)
194822.8 mm (0.9 in)
194946.8 mm (1.8 in)
195052.1 mm (2.1 in)
195147.0 mm (1.9 in)
195245.7 mm (1.8 in)
195323.4 mm (0.9 in)
195446.0 mm (1.8 in)
195527.5 mm (1.1 in)
195621.6 mm (0.9 in)
195744.7 mm (1.8 in)
195833.5 mm (1.3 in)
195928.2 mm (1.1 in)
196037.6 mm (1.5 in)
196191.2 mm (3.6 in)
196229.2 mm (1.1 in)
196351.8 mm (2.0 in)
196438.3 mm (1.5 in)
196522.4 mm (0.9 in)
196657.9 mm (2.3 in)
196751.1 mm (2.0 in)
196826.4 mm (1.0 in)
196922.6 mm (0.9 in)
197024.5 mm (1.0 in)
197129.7 mm (1.2 in)
197235.6 mm (1.4 in)
1973113.5 mm (4.5 in)
1974153.9 mm (6.1 in)
197537.2 mm (1.5 in)
19769.4 mm (0.37 in)
198342.0 mm (1.7 in)
198426.0 mm (1.0 in)
198534.0 mm (1.3 in)
19860.0 mm (0.00 in)
199751.5 mm (2.0 in)
199827.0 mm (1.1 in)
199960.0 mm (2.4 in)
200120.0 mm (0.8 in)
200223.0 mm (0.9 in)
200337.4 mm (1.5 in)
200420.0 mm (0.8 in)
200532.2 mm (1.3 in)
200629.3 mm (1.2 in)
2007108.0 mm (4.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Whyalla (Tregalana) by year The longest dry spell of the year at Whyalla (Tregalana), 1930 to 2007. The record is 124 days in 2002, marked on the chart; the median year is 45 days. 2550751001251940196019802000Record: 124 days in 2002
The longest dry spell of the year at Whyalla (Tregalana), 1930 to 2007. The record is 124 days in 2002, marked on the chart; the median year is 45 days.
Longest dry spell (CDD) at Whyalla (Tregalana) by year
YearLongest dry spell (CDD)
193031 days
193131 days
193231 days
193331 days
193528 days
193631 days
193861 days
193955 days
194048 days
194144 days
194272 days
194333 days
194446 days
194556 days
194635 days
194749 days
194899 days
194951 days
195043 days
195158 days
195254 days
195380 days
195471 days
195539 days
195643 days
195748 days
195864 days
195947 days
196044 days
196126 days
196234 days
196352 days
196488 days
1965105 days
196631 days
196782 days
196830 days
196935 days
197049 days
197144 days
197247 days
197349 days
197436 days
197529 days
197644 days
198341 days
1984105 days
198543 days
198631 days
199754 days
199843 days
199968 days
200145 days
2002124 days
200336 days
200445 days
200554 days
200644 days
200729 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

44 years, 1939 to 2005

A day with at least 26.5 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 134.8 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Whyalla (Tregalana): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years26.5 mm (1.0 in)
5 years41.1 mm (1.6 in)
10 years54.8 mm (2.2 in)
25 years78.9 mm (3.1 in)
50 years103.2 mm (4.1 in)Longer than the 44 years of record
100 years134.8 mm (5.3 in)Longer than the 44 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, 44 years of values from 1939 to 2005.

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: 139.7 mm (5.5 in) in 1947; 131.8 mm (5.2 in) in 1946; 60.0 mm (2.4 in) in 1999.

Download the Data

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