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Port Hedland Post Office Weather Records (ASN00004002)

Record envelope, standing records and threshold days for Port Hedland Post Office (ASN00004002), Australia, with 51 years of record.

Key Facts for Port Hedland Post Office

  • Port Hedland Post Office (ASN00004002) is a weather station in Australia at -20.31 latitude and 118.57 longitude, 8 m (26 ft) above sea level.
  • The station reports from 1898 to 1948, 51 years of record.
  • 1,464 records set at Port Hedland Post Office still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Port Hedland Post Office set a daily record high minimum temperature of 20.8 C (69.4 F) on 18 June 1948.

About the Station

  • Location: Australia, -20.31 latitude, 118.57 longitude.
  • Elevation: 8 m (26 ft).
  • Period of record: 1898 to 1948, 51 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Port Hedland Post Office, with 2026 drawn through them The band shows the record high and record low for each calendar day at Port Hedland 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. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Port Hedland 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 Port Hedland Post Office, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan47.2 C (117.0 F)20.6 C (69.1 F)n/an/a
Feb46.5 C (115.7 F)19.7 C (67.5 F)n/an/a
Mar43.3 C (109.9 F)19.3 C (66.7 F)n/an/a
Apr45.0 C (113.0 F)12.8 C (55.0 F)n/an/a
May38.3 C (100.9 F)8.3 C (46.9 F)n/an/a
Jun34.4 C (93.9 F)5.6 C (42.1 F)n/an/a
Jul34.3 C (93.7 F)5.6 C (42.1 F)n/an/a
Aug35.7 C (96.3 F)6.9 C (44.4 F)n/an/a
Sep38.9 C (102.0 F)7.2 C (45.0 F)n/an/a
Oct45.6 C (114.1 F)13.9 C (57.0 F)n/an/a
Nov45.0 C (113.0 F)15.6 C (60.1 F)n/an/a
Dec47.8 C (118.0 F)19.4 C (66.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Port Hedland Post Office by the year they were set 1,464 records at Port Hedland Post Office still stand. 1915 holds the most, with 59. 02040601912: 31913: 511914: 431915: 591916: 431917: 561918: 331919: 431920: 471921: 271922: 351923: 461924: 441925: 341926: 571927: 371928: 481929: 421930: 311931: 331932: 341933: 261934: 331935: 291936: 341937: 471938: 461939: 391940: 371941: 361942: 321943: 511944: 361945: 521946: 481947: 431948: 291912191619201924192819321936194019441948
1,464 records at Port Hedland Post Office still stand. 1915 holds the most, with 59.
Standing records at Port Hedland Post Office by the year they were set
Year setStanding records
19123
191351
191443
191559
191643
191756
191833
191943
192047
192127
192235
192346
192444
192534
192657
192737
192848
192942
193031
193133
193234
193326
193433
193529
193634
193747
193846
193939
194037
194136
194232
194351
194436
194552
194648
194743
194829

All-Time Record Progression

2 new records
When Port Hedland Post Office set new all-time records 2 all-time records were set at Port Hedland Post Office between 2 March 1941 and 9 March 1946. Each dot is a new record. Record daily precipitationRecord high minimum temperature2 March 1941: Record daily precipitation 282.7 mm (11.1 in)9 March 1946: Record high minimum temperature 31.6 C (88.9 F)1945
2 all-time records were set at Port Hedland Post Office between 2 March 1941 and 9 March 1946. Each dot is a new record.
When Port Hedland Post Office set new all-time records
DateKindDetail
1941-03-02Record daily precipitationRecord daily precipitation 282.7 mm (11.1 in)
1946-03-09Record high minimum temperatureRecord high minimum temperature 31.6 C (88.9 F)

Wettest Day of Each Month

Mar: 282.7 mm (11.1 in)
Record daily precipitation for each month at Port Hedland Post Office The wettest day on record for each calendar month at Port Hedland Post Office. The most was 282.7 mm (11.1 in) on 2 March 1941. 0100200300 Jan: 152.4 mm (6.0 in), 12 January 1939 Jan Feb: 129.5 mm (5.1 in), 12 February 1929 Feb Mar: 282.7 mm (11.1 in), 2 March 1941 Mar Apr: 109.7 mm (4.3 in), 19 April 1937 Apr May: 162.1 mm (6.4 in), 9 May 1939 May Jun: 142.2 mm (5.6 in), 15 June 1909 Jun Jul: 47.0 mm (1.9 in), 11 July 1946 Jul Aug: 92.5 mm (3.6 in), 21 August 1919 Aug Sep: 21.6 mm (0.9 in), 12 September 1920 Sep Oct: 32.3 mm (1.3 in), 1 October 1937 Oct Nov: 77.2 mm (3.0 in), 26 November 1942 Nov Dec: 228.6 mm (9.0 in), 30 December 1947 Dec
The wettest day on record for each calendar month at Port Hedland Post Office. The most was 282.7 mm (11.1 in) on 2 March 1941.
Record daily precipitation for each month at Port Hedland Post Office
MonthRecord daily precipitation (mm)Date
Jan152.4 mm (6.0 in)12 January 1939
Feb129.5 mm (5.1 in)12 February 1929
Mar282.7 mm (11.1 in)2 March 1941
Apr109.7 mm (4.3 in)19 April 1937
May162.1 mm (6.4 in)9 May 1939
Jun142.2 mm (5.6 in)15 June 1909
Jul47.0 mm (1.9 in)11 July 1946
Aug92.5 mm (3.6 in)21 August 1919
Sep21.6 mm (0.9 in)12 September 1920
Oct32.3 mm (1.3 in)1 October 1937
Nov77.2 mm (3.0 in)26 November 1942
Dec228.6 mm (9.0 in)30 December 1947

Period of Record Coverage

1912 to 1948
Days with data per year at Port Hedland Post Office 37 years of record at Port Hedland Post Office, 1912 to 1948. 2 years have data for under 90 percent of days and are left out of rankings: 1912, 1948. 1912: 81 of 366 days1913: 354 of 365 days1914: 334 of 365 days1915: 365 of 365 days1916: 366 of 366 days1917: 365 of 365 days1918: 365 of 365 days1919: 365 of 365 days1920: 357 of 366 days1921: 364 of 365 days1922: 365 of 365 days1923: 365 of 365 days1924: 366 of 366 days1925: 365 of 365 days1926: 365 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 365 of 365 days1932: 366 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 365 of 365 days1936: 366 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 361 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 362 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 364 of 365 days1948: 182 of 366 days1915192019251930193519401945
37 years of record at Port Hedland Post Office, 1912 to 1948. 2 years have data for under 90 percent of days and are left out of rankings: 1912, 1948.
Days with data per year at Port Hedland Post Office
YearDays with dataShare of yearComplete
19128122%No
191335497%Yes
191433492%Yes
1915365100%Yes
1916366100%Yes
1917365100%Yes
1918365100%Yes
1919365100%Yes
192035798%Yes
1921364100%Yes
1922365100%Yes
1923365100%Yes
1924366100%Yes
1925365100%Yes
1926365100%Yes
1927365100%Yes
1928366100%Yes
1929365100%Yes
1930365100%Yes
1931365100%Yes
1932366100%Yes
1933365100%Yes
1934365100%Yes
1935365100%Yes
1936366100%Yes
1937365100%Yes
1938365100%Yes
193936199%Yes
1940366100%Yes
1941365100%Yes
194236299%Yes
1943365100%Yes
1944366100%Yes
1945365100%Yes
1946365100%Yes
1947364100%Yes
194818250%No

Latest Records

20
Latest records at Port Hedland Post Office
DateStationRecordValueBeat old record byOld record stoodSignificance
18 June 1948Port Hedland Post Office, AUdaily high min20.8 C (69.4 F)0.9 C (1.6 F)26 years13 of 100 (Routine)
16 June 1948Port Hedland Post Office, AUdaily high min20.1 C (68.2 F)0.1 C (0.2 F)10 years6 of 100 (Routine)
6 June 1948Port Hedland Post Office, AUdaily high max (Tie)31.7 C (89.1 F)tie10 years1 of 100 (Routine)
28 April 1948Port Hedland Post Office, AUdaily high min24.1 C (75.4 F)0.2 C (0.4 F)33 years12 of 100 (Routine)
26 April 1948Port Hedland Post Office, AUdaily high min24.4 C (75.9 F)0.5 C (0.9 F)33 years13 of 100 (Routine)
23 April 1948Port Hedland Post Office, AUdaily low max25.8 C (78.4 F)3.0 C (5.4 F)11 years17 of 100 (Routine)
23 April 1948Port Hedland Post Office, AUdaily rain33.3 mm (1.3 in)25.7 mm (1.0 in)7 years17 of 100 (Routine)
22 April 1948Port Hedland Post Office, AUdaily low max22.9 C (73.2 F)7.0 C (12.6 F)11 years32 of 100 (Routine)
21 April 1948Port Hedland Post Office, AUdaily low max (Tie)29.4 C (84.9 F)tie22 years2 of 100 (Routine)
18 April 1948Port Hedland Post Office, AUdaily rain16.0 mm (0.6 in)4.6 mm (0.18 in)17 years11 of 100 (Routine)
17 April 1948Port Hedland Post Office, AUdaily low max25.6 C (78.1 F)1.0 C (1.8 F)29 years14 of 100 (Routine)
10 April 1948Port Hedland Post Office, AUdaily high min27.7 C (81.9 F)1.0 C (1.8 F)34 years16 of 100 (Routine)
8 April 1948Port Hedland Post Office, AUdaily high max40.8 C (105.4 F)0.2 C (0.4 F)9 years5 of 100 (Routine)
3 April 1948Port Hedland Post Office, AUdaily high max41.3 C (106.3 F)0.7 C (1.3 F)12 years8 of 100 (Routine)
2 April 1948Port Hedland Post Office, AUdaily high max44.3 C (111.7 F)2.6 C (4.7 F)12 years15 of 100 (Routine)
1 April 1948Port Hedland Post Office, AUmonthly high max45.0 C (113.0 F)3.3 C (5.9 F)21 years31 of 100 (Routine)
31 March 1948Port Hedland Post Office, AUdaily high max43.2 C (109.8 F)3.6 C (6.5 F)33 years23 of 100 (Routine)
25 March 1948Port Hedland Post Office, AUdaily low min20.7 C (69.3 F)0.1 C (0.2 F)28 years11 of 100 (Routine)
22 March 1948Port Hedland Post Office, AUdaily high max39.8 C (103.6 F)0.9 C (1.6 F)5 years6 of 100 (Routine)
19 March 1948Port Hedland Post Office, AUdaily high max (Tie)41.1 C (106.0 F)tie23 years2 of 100 (Routine)

Climate Trend

33 complete years, 1913 to 1947
Annual mean temperature at Port Hedland Post Office as warming stripes, 1913 to 1947 One stripe for each of 33 complete years at Port Hedland Post Office, 1913 to 1947. Blue stripes are years cooler than the station's own mean of 26.1 C (78.9 F); red stripes are warmer. The coolest year was 1929, at 25.3 C (77.5 F), and the warmest was 1938, at 27.1 C (80.8 F). The strongest colour marks a difference of 1.1 C (2.0 F). 1913: 25.4 C, -0.7 C from the station mean1915: 26.0 C, 0.0 C from the station mean1916: 25.7 C, -0.4 C from the station mean1917: 25.3 C, -0.8 C from the station mean1918: 25.8 C, -0.3 C from the station mean1919: 26.2 C, +0.1 C from the station mean1921: 25.9 C, -0.1 C from the station mean1922: 25.7 C, -0.4 C from the station mean1923: 25.8 C, -0.3 C from the station mean1924: 26.3 C, +0.2 C from the station mean1925: 25.7 C, -0.4 C from the station mean1926: 26.2 C, +0.2 C from the station mean1927: 26.1 C, 0.0 C from the station mean1928: 26.5 C, +0.4 C from the station mean1929: 25.3 C, -0.8 C from the station mean1930: 26.3 C, +0.2 C from the station mean1931: 25.9 C, -0.2 C from the station mean1932: 25.9 C, -0.2 C from the station mean1933: 26.1 C, 0.0 C from the station mean1934: 25.4 C, -0.7 C from the station mean1935: 25.6 C, -0.5 C from the station mean1936: 26.2 C, +0.1 C from the station mean1937: 26.4 C, +0.3 C from the station mean1938: 27.1 C, +1.0 C from the station mean1939: 26.1 C, 0.0 C from the station mean1940: 26.7 C, +0.6 C from the station mean1941: 26.8 C, +0.7 C from the station mean1942: 26.4 C, +0.3 C from the station mean1943: 26.0 C, -0.1 C from the station mean1944: 26.6 C, +0.5 C from the station mean1945: 26.4 C, +0.3 C from the station mean1946: 26.4 C, +0.3 C from the station mean1947: 26.8 C, +0.7 C from the station mean1913192019251930193519401945
One stripe for each of 33 complete years at Port Hedland Post Office, 1913 to 1947. Blue stripes are years cooler than the station's own mean of 26.1 C (78.9 F); red stripes are warmer. The coolest year was 1929, at 25.3 C (77.5 F), and the warmest was 1938, at 27.1 C (80.8 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Port Hedland Post Office as warming stripes, 1913 to 1947
YearAnnual mean temperatureDifference from the station mean
191325.4 C-0.72 C
191526.0 C-0.04 C
191625.7 C-0.35 C
191725.3 C-0.75 C
191825.8 C-0.28 C
191926.2 C+0.11 C
192125.9 C-0.14 C
192225.7 C-0.43 C
192325.8 C-0.31 C
192426.3 C+0.21 C
192525.7 C-0.38 C
192626.2 C+0.16 C
192726.1 C+0.02 C
192826.5 C+0.38 C
192925.3 C-0.81 C
193026.3 C+0.21 C
193125.9 C-0.22 C
193225.9 C-0.18 C
193326.1 C0.00 C
193425.4 C-0.73 C
193525.6 C-0.46 C
193626.2 C+0.14 C
193726.4 C+0.29 C
193827.1 C+1.01 C
193926.1 C+0.02 C
194026.7 C+0.63 C
194126.8 C+0.72 C
194226.4 C+0.31 C
194326.0 C-0.13 C
194426.6 C+0.51 C
194526.4 C+0.27 C
194626.4 C+0.32 C
194726.8 C+0.68 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.4) per decade over 1913 to 1947. In Fahrenheit: 0.5 F (0.2 to 0.7) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Port Hedland Post Office
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.1 to 0.4) per decade0.5 F (0.2 to 0.7) per decade1913 to 194733Rise
Mean daily maximum0.6 C (0.4 to 0.7) per decade1.0 F (0.7 to 1.3) per decade1913 to 194733Rise
Mean daily minimum-0.02 C (-0.18 to 0.15) per decade-0.03 F (-0.33 to 0.27) per decade1913 to 194733Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1898 to 1948
Yearly extremes at Port Hedland Post Office: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)47.8 C (118.0 F)194143.9 C (111.0 F)37
Coldest night (TNn)5.6 C (42.1 F)19168.4 C (47.1 F)37
Wettest day (Rx1day)282.7 mm (11.1 in)194164.8 mm (2.6 in)51
Wettest five days (Rx5day)351.5 mm (13.8 in)1913109.0 mm (4.3 in)51
Longest dry spell (CDD)277 days1935130 days51

Hottest day (TXx)

Hottest day (TXx) at Port Hedland Post Office by year The hottest day of the year at Port Hedland Post Office, 1898 to 1948. The record is 47.8 C (118.0 F) in 1941, marked on the chart; the median year is 43.9 C (111.0 F). 404244464819001910192019301940Record: 47.8 C (118.0 F) in 1941
The hottest day of the year at Port Hedland Post Office, 1898 to 1948. The record is 47.8 C (118.0 F) in 1941, marked on the chart; the median year is 43.9 C (111.0 F).
Hottest day (TXx) at Port Hedland Post Office by year
YearHottest day (TXx)
1898n/a
1899n/a
1900n/a
1901n/a
1902n/a
1903n/a
1904n/a
1905n/a
1906n/a
1907n/a
1908n/a
1909n/a
1910n/a
1911n/a
191240.6 C (105.1 F)
191342.3 C (108.1 F)
191441.7 C (107.1 F)
191543.9 C (111.0 F)
191646.7 C (116.1 F)
191742.8 C (109.0 F)
191842.2 C (108.0 F)
191945.0 C (113.0 F)
192045.3 C (113.5 F)
192142.1 C (107.8 F)
192244.4 C (111.9 F)
192344.7 C (112.5 F)
192444.4 C (111.9 F)
192544.4 C (111.9 F)
192645.6 C (114.1 F)
192742.2 C (108.0 F)
192845.0 C (113.0 F)
192945.0 C (113.0 F)
193042.8 C (109.0 F)
193141.9 C (107.4 F)
193242.8 C (109.0 F)
193343.3 C (109.9 F)
193442.8 C (109.0 F)
193542.8 C (109.0 F)
193642.9 C (109.2 F)
193743.3 C (109.9 F)
193844.1 C (111.4 F)
193945.6 C (114.1 F)
194046.1 C (115.0 F)
194147.8 C (118.0 F)
194242.8 C (109.0 F)
194346.7 C (116.1 F)
194443.9 C (111.0 F)
194543.3 C (109.9 F)
194642.7 C (108.9 F)
194746.9 C (116.4 F)
194846.5 C (115.7 F)

Coldest night (TNn)

Coldest night (TNn) at Port Hedland Post Office by year The coldest night of the year at Port Hedland Post Office, 1898 to 1948. The record is 5.6 C (42.1 F) in 1916, marked on the chart; the median year is 8.4 C (47.1 F). 510152019001910192019301940Record: 5.6 C (42.1 F) in 1916
The coldest night of the year at Port Hedland Post Office, 1898 to 1948. The record is 5.6 C (42.1 F) in 1916, marked on the chart; the median year is 8.4 C (47.1 F).
Coldest night (TNn) at Port Hedland Post Office by year
YearColdest night (TNn)
1898n/a
1899n/a
1900n/a
1901n/a
1902n/a
1903n/a
1904n/a
1905n/a
1906n/a
1907n/a
1908n/a
1909n/a
1910n/a
1911n/a
191217.2 C (63.0 F)
19138.4 C (47.1 F)
19148.9 C (48.0 F)
19159.4 C (48.9 F)
19165.6 C (42.1 F)
19178.3 C (46.9 F)
19189.4 C (48.9 F)
19198.9 C (48.0 F)
19207.8 C (46.0 F)
19219.6 C (49.3 F)
19227.7 C (45.9 F)
19238.8 C (47.8 F)
192410.6 C (51.1 F)
19256.1 C (43.0 F)
19265.6 C (42.1 F)
19277.8 C (46.0 F)
19287.8 C (46.0 F)
19297.8 C (46.0 F)
193011.7 C (53.1 F)
193110.4 C (50.7 F)
19329.7 C (49.5 F)
19337.3 C (45.1 F)
19349.4 C (48.9 F)
19357.0 C (44.6 F)
19367.2 C (45.0 F)
19377.2 C (45.0 F)
19388.9 C (48.0 F)
19397.8 C (46.0 F)
194010.0 C (50.0 F)
19418.9 C (48.0 F)
194210.1 C (50.2 F)
19436.9 C (44.4 F)
19446.7 C (44.1 F)
19457.8 C (46.0 F)
19465.7 C (42.3 F)
194711.0 C (51.8 F)
19488.6 C (47.5 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Port Hedland Post Office by year The wettest day of the year at Port Hedland Post Office, 1898 to 1948. The record is 282.7 mm (11.1 in) in 1941, marked on the chart; the median year is 64.8 mm (2.6 in). 010020030019001910192019301940Record: 282.7 mm (11.1 in) in 1941
The wettest day of the year at Port Hedland Post Office, 1898 to 1948. The record is 282.7 mm (11.1 in) in 1941, marked on the chart; the median year is 64.8 mm (2.6 in).
Wettest day (Rx1day) at Port Hedland Post Office by year
YearWettest day (Rx1day)
18980.0 mm (0.00 in)
18990.0 mm (0.00 in)
19000.0 mm (0.00 in)
19010.0 mm (0.00 in)
19020.0 mm (0.00 in)
19030.0 mm (0.00 in)
19040.0 mm (0.00 in)
19050.0 mm (0.00 in)
19060.0 mm (0.00 in)
190736.3 mm (1.4 in)
1908111.8 mm (4.4 in)
1909142.2 mm (5.6 in)
191062.0 mm (2.4 in)
191173.7 mm (2.9 in)
191264.8 mm (2.6 in)
1913203.2 mm (8.0 in)
191468.1 mm (2.7 in)
1915121.9 mm (4.8 in)
191666.8 mm (2.6 in)
191764.5 mm (2.5 in)
191858.4 mm (2.3 in)
191992.5 mm (3.6 in)
192059.9 mm (2.4 in)
192193.0 mm (3.7 in)
192259.7 mm (2.4 in)
192335.6 mm (1.4 in)
192427.2 mm (1.1 in)
192546.2 mm (1.8 in)
192667.3 mm (2.6 in)
1927100.3 mm (3.9 in)
192876.7 mm (3.0 in)
1929129.5 mm (5.1 in)
193039.6 mm (1.6 in)
1931132.1 mm (5.2 in)
193231.2 mm (1.2 in)
193339.6 mm (1.6 in)
1934161.5 mm (6.4 in)
193560.5 mm (2.4 in)
1936100.6 mm (4.0 in)
1937109.7 mm (4.3 in)
1938129.3 mm (5.1 in)
1939162.1 mm (6.4 in)
194030.7 mm (1.2 in)
1941282.7 mm (11.1 in)
1942255.3 mm (10.1 in)
194389.4 mm (3.5 in)
194412.4 mm (0.5 in)
194562.2 mm (2.4 in)
1946120.9 mm (4.8 in)
1947228.6 mm (9.0 in)
194889.4 mm (3.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Port Hedland Post Office by year The wettest five days of the year at Port Hedland Post Office, 1898 to 1948. The record is 351.5 mm (13.8 in) in 1913, marked on the chart; the median year is 109.0 mm (4.3 in). 010020030040019001910192019301940Record: 351.5 mm (13.8 in) in 1913
The wettest five days of the year at Port Hedland Post Office, 1898 to 1948. The record is 351.5 mm (13.8 in) in 1913, marked on the chart; the median year is 109.0 mm (4.3 in).
Wettest five days (Rx5day) at Port Hedland Post Office by year
YearWettest five days (Rx5day)
18980.0 mm (0.00 in)
18990.0 mm (0.00 in)
19000.0 mm (0.00 in)
19010.0 mm (0.00 in)
19020.0 mm (0.00 in)
19030.0 mm (0.00 in)
19040.0 mm (0.00 in)
19050.0 mm (0.00 in)
19060.0 mm (0.00 in)
1907117.1 mm (4.6 in)
1908154.5 mm (6.1 in)
1909143.0 mm (5.6 in)
1910130.1 mm (5.1 in)
191196.2 mm (3.8 in)
191289.7 mm (3.5 in)
1913351.5 mm (13.8 in)
191478.8 mm (3.1 in)
1915164.0 mm (6.5 in)
191681.3 mm (3.2 in)
1917145.6 mm (5.7 in)
191859.7 mm (2.4 in)
1919148.4 mm (5.8 in)
192084.5 mm (3.3 in)
1921172.8 mm (6.8 in)
1922136.9 mm (5.4 in)
192362.7 mm (2.5 in)
192427.2 mm (1.1 in)
1925132.6 mm (5.2 in)
1926115.1 mm (4.5 in)
1927114.3 mm (4.5 in)
1928103.4 mm (4.1 in)
1929161.3 mm (6.4 in)
193079.9 mm (3.1 in)
1931157.7 mm (6.2 in)
193249.0 mm (1.9 in)
193351.8 mm (2.0 in)
1934286.9 mm (11.3 in)
193567.9 mm (2.7 in)
1936109.0 mm (4.3 in)
1937117.2 mm (4.6 in)
1938244.1 mm (9.6 in)
1939208.8 mm (8.2 in)
194060.5 mm (2.4 in)
1941289.8 mm (11.4 in)
1942329.5 mm (13.0 in)
1943163.3 mm (6.4 in)
194418.3 mm (0.7 in)
194587.9 mm (3.5 in)
1946138.1 mm (5.4 in)
1947259.8 mm (10.2 in)
1948259.8 mm (10.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Port Hedland Post Office by year The longest dry spell of the year at Port Hedland Post Office, 1898 to 1948. The record is 277 days in 1935, marked on the chart; the median year is 130 days. 010020030019001910192019301940Record: 277 days in 1935
The longest dry spell of the year at Port Hedland Post Office, 1898 to 1948. The record is 277 days in 1935, marked on the chart; the median year is 130 days.
Longest dry spell (CDD) at Port Hedland Post Office by year
YearLongest dry spell (CDD)
1898123 days
189991 days
1900153 days
190192 days
190292 days
190362 days
190430 days
190531 days
190661 days
1907152 days
1908114 days
1909162 days
1910124 days
1911139 days
1912174 days
1913140 days
1914128 days
1915150 days
1916117 days
191783 days
1918203 days
1919106 days
192093 days
192187 days
1922215 days
1923176 days
1924260 days
1925226 days
1926214 days
1927184 days
1928120 days
1929141 days
1930130 days
193138 days
1932129 days
1933104 days
1934220 days
1935277 days
1936217 days
1937114 days
1938166 days
1939140 days
1940199 days
1941171 days
1942167 days
1943113 days
1944269 days
194565 days
1946160 days
194781 days
194853 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

41 years, 1907 to 1947

A day with at least 79.6 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 340.3 mm (13.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Port Hedland Post Office: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years79.6 mm (3.1 in)
5 years132.5 mm (5.2 in)
10 years173.4 mm (6.8 in)
25 years233.0 mm (9.2 in)
50 years283.7 mm (11.2 in)Longer than the 41 years of record
100 years340.3 mm (13.4 in)Longer than the 41 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, 41 years of values from 1907 to 1947.

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: 282.7 mm (11.1 in) in 1941; 255.3 mm (10.1 in) in 1942; 228.6 mm (9.0 in) in 1947.

Download the Data

  • Data for Port Hedland Post Office standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Port Hedland 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 (2026-10-14).