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Gnowanallup Weather Records (ASN00010523)

Record envelope, standing records and threshold days for Gnowanallup (ASN00010523), Australia, with 57 years of record.

Key Facts for Gnowanallup

  • Gnowanallup (ASN00010523) is a weather station in Australia at -33.58 latitude and 118.23 longitude, 335 m (1,099 ft) above sea level.
  • The station reports from 1921 to 1977, 57 years of record.
  • 0 records set at Gnowanallup still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Gnowanallup set a daily record precipitation of 33.0 mm (1.3 in) on 19 November 1974.

About the Station

  • Location: Australia, -33.58 latitude, 118.23 longitude.
  • Elevation: 335 m (1,099 ft).
  • Period of record: 1921 to 1977, 57 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

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

All-Time Record Progression

1 new records
When Gnowanallup set new all-time records 1 all-time records were set at Gnowanallup between 17 February 1955 and 17 February 1955. Each dot is a new record. Record daily precipitation17 February 1955: Record daily precipitation 173.7 mm (6.8 in)1955
1 all-time records were set at Gnowanallup between 17 February 1955 and 17 February 1955. Each dot is a new record.
When Gnowanallup set new all-time records
DateKindDetail
1955-02-17Record daily precipitationRecord daily precipitation 173.7 mm (6.8 in)

Wettest Day of Each Month

Feb: 173.7 mm (6.8 in)
Record daily precipitation for each month at Gnowanallup The wettest day on record for each calendar month at Gnowanallup. The most was 173.7 mm (6.8 in) on 17 February 1955. 050100150200 Jan: 55.9 mm (2.2 in), 31 January 1943 Jan Feb: 173.7 mm (6.8 in), 17 February 1955 Feb Mar: 102.9 mm (4.1 in), 9 March 1934 Mar Apr: 43.7 mm (1.7 in), 20 April 1928 Apr May: 55.6 mm (2.2 in), 29 May 1922 May Jun: 44.5 mm (1.8 in), 10 June 1945 Jun Jul: 47.8 mm (1.9 in), 9 July 1952 Jul Aug: 29.5 mm (1.2 in), 23 August 1937 Aug Sep: 70.1 mm (2.8 in), 20 September 1955 Sep Oct: 36.8 mm (1.4 in), 23 October 1932 Oct Nov: 56.9 mm (2.2 in), 23 November 1971 Nov Dec: 54.9 mm (2.2 in), 10 December 1925 Dec
The wettest day on record for each calendar month at Gnowanallup. The most was 173.7 mm (6.8 in) on 17 February 1955.
Record daily precipitation for each month at Gnowanallup
MonthRecord daily precipitation (mm)Date
Jan55.9 mm (2.2 in)31 January 1943
Feb173.7 mm (6.8 in)17 February 1955
Mar102.9 mm (4.1 in)9 March 1934
Apr43.7 mm (1.7 in)20 April 1928
May55.6 mm (2.2 in)29 May 1922
Jun44.5 mm (1.8 in)10 June 1945
Jul47.8 mm (1.9 in)9 July 1952
Aug29.5 mm (1.2 in)23 August 1937
Sep70.1 mm (2.8 in)20 September 1955
Oct36.8 mm (1.4 in)23 October 1932
Nov56.9 mm (2.2 in)23 November 1971
Dec54.9 mm (2.2 in)10 December 1925

Latest Records

20
Latest records at Gnowanallup
DateStationRecordValueBeat old record byOld record stoodSignificance
19 November 1974Gnowanallup, AUdaily rain33.0 mm (1.3 in)4.6 mm (0.18 in)48 years25 of 100 (Routine)
18 November 1974Gnowanallup, AUdaily rain19.2 mm (0.8 in)15.9 mm (0.6 in)5 years20 of 100 (Routine)
17 November 1974Gnowanallup, AUdaily rain5.4 mm (0.21 in)0.3 mm (0.01 in)35 years15 of 100 (Routine)
19 August 1974Gnowanallup, AUdaily rain15.6 mm (0.6 in)4.4 mm (0.17 in)15 years19 of 100 (Routine)
1 August 1974Gnowanallup, AUdaily rain26.0 mm (1.0 in)14.6 mm (0.6 in)52 years54 of 100 (Notable)
3 July 1974Gnowanallup, AUdaily rain19.8 mm (0.8 in)6.8 mm (0.27 in)24 years20 of 100 (Routine)
2 July 1974Gnowanallup, AUdaily rain21.0 mm (0.8 in)7.5 mm (0.30 in)1 year18 of 100 (Routine)
25 May 1974Gnowanallup, AUdaily rain25.4 mm (1.0 in)11.4 mm (0.4 in)12 years22 of 100 (Routine)
12 May 1974Gnowanallup, AUdaily rain10.0 mm (0.4 in)3.4 mm (0.13 in)17 years14 of 100 (Routine)
11 May 1974Gnowanallup, AUdaily rain25.4 mm (1.0 in)14.7 mm (0.6 in)0 years23 of 100 (Routine)
4 May 1974Gnowanallup, AUdaily rain31.0 mm (1.2 in)21.3 mm (0.8 in)43 years44 of 100 (Notable)
14 April 1974Gnowanallup, AUdaily rain14.6 mm (0.6 in)10.5 mm (0.4 in)31 years20 of 100 (Routine)
4 April 1974Gnowanallup, AUdaily rain10.4 mm (0.4 in)1.3 mm (0.05 in)39 years18 of 100 (Routine)
14 November 1973Gnowanallup, AUdaily rain36.1 mm (1.4 in)20.1 mm (0.8 in)20 years39 of 100 (Notable)
7 July 1973Gnowanallup, AUdaily rain18.3 mm (0.7 in)2.8 mm (0.11 in)12 years13 of 100 (Routine)
11 May 1973Gnowanallup, AUdaily rain10.7 mm (0.4 in)0.3 mm (0.01 in)40 years17 of 100 (Routine)
8 January 1973Gnowanallup, AUdaily rain15.2 mm (0.6 in)12.7 mm (0.5 in)40 years20 of 100 (Routine)
17 August 1972Gnowanallup, AUdaily rain (Tie)11.4 mm (0.4 in)tie24 years3 of 100 (Routine)
23 July 1972Gnowanallup, AUdaily rain15.0 mm (0.6 in)2.6 mm (0.10 in)14 years13 of 100 (Routine)
2 July 1972Gnowanallup, AUdaily rain13.5 mm (0.5 in)4.6 mm (0.18 in)5 years14 of 100 (Routine)

Extremes by Year

1921 to 1977
Yearly extremes at Gnowanallup: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)173.7 mm (6.8 in)195532.3 mm (1.3 in)55
Wettest five days (Rx5day)242.6 mm (9.6 in)195544.5 mm (1.8 in)55
Longest dry spell (CDD)273 days197747 days55

Wettest day (Rx1day)

Wettest day (Rx1day) at Gnowanallup by year The wettest day of the year at Gnowanallup, 1921 to 1977. The record is 173.7 mm (6.8 in) in 1955, marked on the chart; the median year is 32.3 mm (1.3 in). 05010015020019301940195019601970Record: 173.7 mm (6.8 in) in 1955
The wettest day of the year at Gnowanallup, 1921 to 1977. The record is 173.7 mm (6.8 in) in 1955, marked on the chart; the median year is 32.3 mm (1.3 in).
Wettest day (Rx1day) at Gnowanallup by year
YearWettest day (Rx1day)
192121.6 mm (0.9 in)
192255.6 mm (2.2 in)
192320.3 mm (0.8 in)
192429.7 mm (1.2 in)
192554.9 mm (2.2 in)
192628.4 mm (1.1 in)
192732.3 mm (1.3 in)
192843.7 mm (1.7 in)
192935.3 mm (1.4 in)
193052.1 mm (2.1 in)
193128.7 mm (1.1 in)
193236.8 mm (1.4 in)
193327.9 mm (1.1 in)
1934102.9 mm (4.1 in)
193523.9 mm (0.9 in)
193618.5 mm (0.7 in)
193745.2 mm (1.8 in)
193817.0 mm (0.7 in)
193944.2 mm (1.7 in)
194020.1 mm (0.8 in)
194115.5 mm (0.6 in)
194244.5 mm (1.8 in)
194355.9 mm (2.2 in)
194419.8 mm (0.8 in)
194544.5 mm (1.8 in)
194626.2 mm (1.0 in)
194741.1 mm (1.6 in)
194835.6 mm (1.4 in)
194927.9 mm (1.1 in)
195020.3 mm (0.8 in)
195145.7 mm (1.8 in)
195247.8 mm (1.9 in)
195324.9 mm (1.0 in)
195418.3 mm (0.7 in)
1955173.7 mm (6.8 in)
195619.8 mm (0.8 in)
195720.3 mm (0.8 in)
195835.3 mm (1.4 in)
195932.3 mm (1.3 in)
196032.8 mm (1.3 in)
196138.4 mm (1.5 in)
196220.1 mm (0.8 in)
19630.0 mm (0.00 in)
19640.0 mm (0.00 in)
196532.5 mm (1.3 in)
196626.9 mm (1.1 in)
196747.0 mm (1.9 in)
196831.5 mm (1.2 in)
196924.4 mm (1.0 in)
197035.3 mm (1.4 in)
197156.9 mm (2.2 in)
197219.1 mm (0.8 in)
197336.1 mm (1.4 in)
197433.0 mm (1.3 in)
19770.0 mm (0.00 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Gnowanallup by year The wettest five days of the year at Gnowanallup, 1921 to 1977. The record is 242.6 mm (9.6 in) in 1955, marked on the chart; the median year is 44.5 mm (1.8 in). 010020030019301940195019601970Record: 242.6 mm (9.6 in) in 1955
The wettest five days of the year at Gnowanallup, 1921 to 1977. The record is 242.6 mm (9.6 in) in 1955, marked on the chart; the median year is 44.5 mm (1.8 in).
Wettest five days (Rx5day) at Gnowanallup by year
YearWettest five days (Rx5day)
192126.9 mm (1.1 in)
192265.3 mm (2.6 in)
192341.7 mm (1.6 in)
192443.8 mm (1.7 in)
192565.3 mm (2.6 in)
192643.2 mm (1.7 in)
192743.9 mm (1.7 in)
192845.5 mm (1.8 in)
192969.9 mm (2.8 in)
193091.5 mm (3.6 in)
193151.6 mm (2.0 in)
193250.0 mm (2.0 in)
193336.0 mm (1.4 in)
1934124.7 mm (4.9 in)
193538.1 mm (1.5 in)
193630.4 mm (1.2 in)
193778.7 mm (3.1 in)
193842.4 mm (1.7 in)
193986.1 mm (3.4 in)
194034.0 mm (1.3 in)
194121.5 mm (0.8 in)
194271.1 mm (2.8 in)
194361.0 mm (2.4 in)
194424.4 mm (1.0 in)
194578.3 mm (3.1 in)
194642.2 mm (1.7 in)
194752.9 mm (2.1 in)
194849.8 mm (2.0 in)
194933.7 mm (1.3 in)
195034.0 mm (1.3 in)
195151.2 mm (2.0 in)
195252.4 mm (2.1 in)
195343.7 mm (1.7 in)
195436.3 mm (1.4 in)
1955242.6 mm (9.6 in)
195640.3 mm (1.6 in)
195724.1 mm (0.9 in)
195847.9 mm (1.9 in)
195955.4 mm (2.2 in)
196069.4 mm (2.7 in)
196145.0 mm (1.8 in)
196243.0 mm (1.7 in)
19630.0 mm (0.00 in)
19640.0 mm (0.00 in)
196542.9 mm (1.7 in)
196671.8 mm (2.8 in)
196748.5 mm (1.9 in)
196859.2 mm (2.3 in)
196929.7 mm (1.2 in)
197044.5 mm (1.8 in)
197166.8 mm (2.6 in)
197229.2 mm (1.1 in)
197336.9 mm (1.5 in)
197457.6 mm (2.3 in)
19770.0 mm (0.00 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Gnowanallup by year The longest dry spell of the year at Gnowanallup, 1921 to 1977. The record is 273 days in 1977, marked on the chart; the median year is 47 days. 010020030019301940195019601970Record: 273 days in 1977
The longest dry spell of the year at Gnowanallup, 1921 to 1977. The record is 273 days in 1977, marked on the chart; the median year is 47 days.
Longest dry spell (CDD) at Gnowanallup by year
YearLongest dry spell (CDD)
192124 days
192255 days
192368 days
192449 days
192546 days
192626 days
192754 days
192861 days
192940 days
193056 days
193164 days
193231 days
193337 days
193431 days
193534 days
193638 days
193759 days
193853 days
193944 days
194051 days
194142 days
194235 days
194347 days
194454 days
194559 days
194643 days
194734 days
194884 days
194942 days
195064 days
195135 days
195253 days
195348 days
195457 days
195540 days
195659 days
195740 days
195849 days
195939 days
196056 days
196151 days
196252 days
196331 days
196431 days
196561 days
196664 days
196733 days
196843 days
196936 days
197037 days
197140 days
197250 days
197379 days
197430 days
1977273 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

49 years, 1922 to 1973

A day with at least 31.4 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 130.8 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Gnowanallup: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years31.4 mm (1.2 in)
5 years47.2 mm (1.9 in)
10 years61.0 mm (2.4 in)
25 years83.5 mm (3.3 in)
50 years104.7 mm (4.1 in)Longer than the 49 years of record
100 years130.8 mm (5.1 in)Longer than the 49 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, 49 years of values from 1922 to 1973.

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: 173.7 mm (6.8 in) in 1955; 102.9 mm (4.1 in) in 1934; 56.9 mm (2.2 in) in 1971.

Download the Data

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