Greater Perth in January 2025

Rainfall

  • Rainfall totals for January were below average at all sites across Greater Perth.
  • January rainfall totals were 10 mm or below across Greater Perth, and ranged from around 12% of average at Swanbourne to around 51% of average at Bickley.

Temperature

  • Mean maximum temperatures for January at all sites across Greater Perth were above average.
  • January mean maximum temperatures for Greater Perth ranged from 1.4 °C above average at Perth Metro, Swanbourne and Karnet to 2.9 °C above average at Perth Airport.
  • Mean minimum temperatures for January at all sites across Greater Perth were above average.
  • January mean minimum temperatures for Greater Perth ranged from 1.6 °C above average at Rottnest Island to 2.5 °C above average at Karnet.
  • Perth Metro and several other sites had their highest January mean minimum temperature on record.
  • A severe intensity heatwave occured over Geater Perth between 19 and 23 January.
  • The hottest day of the month was on the 20th, with temperatures reaching the low-to-mid 40s. Perth Metro's 43.6 °C was its annual highest temperature for 10 years since 44.4 °C on 5 January 2015.
  • Bickley and Mandurah had their warmest January night (highest daily minimum temperature) on record on the 21st.
  • Pearce RAAF recorded a minimum temperature of 30.9 °C on the 21st, its second-highest minimum temperature on record. The record was 31.2 °C on 12 January 2014.

Perth Metro

  • Total rainfall for Perth Metro was 5.4 mm, which is 32% of the long-term average of 16.7 mm.
  • The mean daily maximum temperature for Perth Metro was 32.8 °C, which is 1.4 °C above the long-term average of 31.4 °C.
  • The warmest day was 43.6 °C on the 20th, and the coolest day was on the 14th when the temperature reached 25.7 °C.
  • The mean daily minimum temperature for Perth Metro was 20.1 °C, which is 2.0 °C above the long-term average of 18.1 °C.
  • The coldest morning was 14.0 °C on the 9th, and the warmest morning was on the 21st when the minimum temperature was 27.2 °C.

Extremes in January 2025
Hottest day 45.5 °C at Pearce RAAF on the 20th
Warmest days on average 36.2 °C at Pearce RAAF
Coolest days on average 28.6 °C at Rottnest Island
Coldest day 22.7 °C at Garden Island HSF on the 14th
Coldest night 11.0 °C at Pearce RAAF on the 9th
Coolest nights on average 17.9 °C at Karnet
17.9 °C at Bickley
Warmest nights on average 20.7 °C at Rottnest Island
20.7 °C at Garden Island HSF
Warmest night 30.9 °C at Pearce RAAF on the 21st
Warmest on average overall 27.7 °C at Pearce RAAF
Coolest on average overall 24.6 °C at Rottnest Island
Wettest overall 10.0 mm at Bickley
Wettest day 5.4 mm at Bungendore on the 25th
5.4 mm at Jarrahdale on the 25th
Strongest wind gust 69.0 km/h at Rottnest Island on the 26th
69.0 km/h at Rottnest Island on the 3rd

Record highest January daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Bickley 27.1 on the 21st 26.5 on 03 Jan 1997 32 15.5
Mandurah 28.4 on the 21st 28.2 on 28 Jan 2012 24 19.0



Record highest January mean minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Karnet 17.9 17.3 in 1978 58 15.4
Bickley 17.9 16.9 in 2012 32 15.5
Swanbourne 20.5 20.4 in 2012 32 18.4
Perth Metro 20.1 =20.1 in 2012 32 18.1
Garden Island HSF 20.7 20.4 in 2012 24 19.0
Mandurah 20.6 =20.6 in 2012 24 19.0



Record highest January mean temperature
New record
(°C)
Old
record
Years of
record
Average for
January
Karnet 25.0 =25.0 in 1978 58 23.0
Jandakot Aero 26.5 =26.5 in 2012 35 24.2
Bickley 25.1 24.6 in 2022 32 23.1



Highest January mean temperature for at least 20 years
Observed
(°C)
Most recent
higher
Average for
January
Perth Airport 26.9 27.6 in 1962 24.5

note: there may be gaps in the historical record at some sites, so it is possible more recent higher values have gone unreported





Summary statistics for January 2025
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
January
2025
Diff
from
average
Highest for
January
2025
Mean for
January
2025
Diff
from
average
Lowest for
January
2025
Total for
January
2025
Average
for
January
Rank of
January
2025
Fraction of
January
average
Bickley 32.4 +1.7 41.3 20th 17.9 +2.4 12.0 18th 10.0 19.7 average 51%
Garden Island HSF 29.4 +1.9 41.2 20th 20.7 +1.7 16.0 15th 3.2 12.3 average 26%
Jandakot Aero 33.6 +2.1 42.9 20th 19.0 +2.1 11.6 18th 4.0 14.9 average 27%
Karnet 32.1 +1.4 41.0 20th 17.9 +2.5 12.0 18th 7.7 17.8 average 43%
Mandurah - - 39.3 20th - - 15.4 18th 1.4 14.5 average 10%
Millendon (Swan Valley) 35.6 45.1 20th 19.0 11.8 9th 1.4
Pearce RAAF 35.9 +2.3 45.5 20th 19.1 +2.1 11.0 9th 2.6 9.9 average 26%
Perth Airport 34.8 +2.9 44.7 20th 19.1 +2.0 11.6 9th 3.2 10.4 average 31%
Perth Metro 32.8 +1.4 43.6 20th 20.1 +2.0 14.0 9th 5.4 16.7 average 32%
Rottnest Island 28.6 +2.0 39.2 20th 20.7 +1.6 16.6 15th 3.0 14.0 average 21%
Swanbourne 31.2 +1.4 43.0 20th 20.5 +2.1 14.9 9th 2.0 17.3 average 12%

Daily maximum temperatures for January 2025
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bickley 37.8 33.2 28.8 28.5 31.0 35.3 32.5 28.0 31.1 27.8 30.8 27.5 28.9 24.4 29.8 38.1 23.1 30.0 37.3 41.3 35.6 35.5 39.0 33.4 27.6 29.3 30.9 34.6 38.4 40.6 33.3
Garden Island HSF 33.5 25.9 23.6 24.6 28.5 35.7 24.6 22.9 25.4 24.4 26.2 25.7 24.5 22.7 28.9 37.9 25.3 27.1 32.6 41.2 36.8 33.1 37.6 30.2 27.2 24.3 25.5 32.3 35.9 40.8 27.5
Jandakot Aero 37.8 33.2 28.5 29.2 32.6 37.4 33.3 27.6 29.9 29.9 27.9 28.4 28.8 41.1 26.1 29.2 37.6 42.9 39.0 38.0 40.2 32.4 30.3 29.4 32.7 37.9 40.1 41.9 31.8
Karnet 37.1 33.0 29.2 28.3 35.2 32.5 28.1 30.3 27.5 29.5 27.0 27.9 25.2 30.3 36.5 24.5 29.8 37.4 41.0 36.1 35.6 37.7 31.8 29.8 29.0 29.5 34.3 37.2 40.5 33.0
Mandurah 32.8 27.8 26.8 26.5 28.8 35.4 29.8 25.1 27.2 25.9 26.7 26.4 27.5 24.9 27.9 37.6 25.1 26.6 35.1 39.3 37.0 35.6 37.8 27.9 29.8 28.1 28.5
Millendon (Swan Valley) 41.0 36.1 30.6 31.7 33.6 38.6 35.2 33.0 33.4 29.7 31.6 27.7 32.3 41.7 26.7 32.8 40.5 45.1 40.8 41.0 42.4 37.2 31.7 32.0 34.9 37.9 41.6
Pearce RAAF 41.6 36.6 30.7 32.2 34.2 38.9 35.7 30.5 33.5 30.3 34.5 30.8 32.1 28.1 33.1 42.2 27.8 33.8 41.9 45.5 41.9 41.8 42.6 39.5 32.8 32.1 35.2 38.5 42.5
Perth Airport 39.5 34.8 30.3 31.4 33.7 38.7 34.5 29.4 31.6 29.8 32.7 29.5 30.2 27.9 32.0 41.5 26.3 32.4 40.2 44.7 39.2 38.8 41.8 34.3 31.9 31.5 34.1 37.8 41.9 42.9 34.1
Perth Metro 38.2 32.7 27.4 28.5 31.7 37.2 27.1 29.6 27.1 30.1 27.3 28.6 25.7 28.7 40.6 26.3 28.3 37.9 43.6 38.3 38.4 39.7 32.1 29.9 28.8 31.2 37.2 39.9 41.2 31.8
Rottnest Island 30.2 24.9 24.4 24.3 26.4 34.3 26.0 23.9 25.2 24.9 25.8 26.2 25.5 23.8 26.3 36.7 25.5 25.4 31.0 39.2 34.9 31.0 35.8 29.1 27.3 24.9 25.5 29.5 33.8 38.4 27.6
Swanbourne 35.4 26.6 25.7 27.4 29.9 37.8 27.5 25.5 26.2 26.4 28.5 26.4 27.1 25.4 28.8 39.4 26.0 27.6 35.7 43.0 37.5 37.3 37.7 30.0 27.8 26.6 28.8 35.4 39.6 40.9 28.2
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily minimum temperatures for January 2025
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Bickley 17.9 22.8 15.6 15.8 13.0 15.2 23.1 15.2 15.1 16.3 15.5 15.2 16.6 14.8 12.2 16.6 21.9 12.0 15.9 20.9 27.1 23.8 22.4 23.4 19.2 18.4 15.0 14.3 18.1 21.0 19.2
Garden Island HSF 22.7 20.0 19.2 18.6 16.7 19.9 22.6 19.2 18.9 18.9 19.5 19.2 20.6 20.3 16.0 18.9 22.6 16.4 19.7 24.0 25.3 25.7 25.4 23.6 21.9 21.6 17.8 18.3 22.4 24.3 22.0
Jandakot Aero 21.9 19.7 16.1 17.1 16.1 18.8 20.3 16.8 12.0 14.9 15.2 18.7 14.7 14.8 21.9 11.6 19.4 24.8 28.1 26.9 27.0 23.2 21.6 20.6 16.2 17.7 21.8 23.1 18.5
Karnet 19.2 21.0 15.0 15.1 16.2 23.5 15.0 14.3 14.1 15.1 14.1 17.0 15.9 12.9 18.0 20.1 12.0 16.5 20.4 25.9 23.4 24.2 22.0 20.0 18.0 14.5 14.9 19.5 22.0 18.0
Mandurah 22.2 21.9 18.5 18.5 16.3 19.3 23.3 18.4 18.3 18.1 19.2 17.4 20.7 19.4 15.6 19.9 22.7 15.4 19.0 24.8 28.4 27.4 27.1 25.0 22.4 21.1 17.3
Millendon (Swan Valley) 21.8 19.4 19.3 16.3 16.8 18.6 19.7 11.8 14.4 13.8 17.7 15.1 13.9 13.8 20.7 12.8 19.9 25.1 29.6 27.7 27.1 20.9 21.0 21.2 15.5 18.1 21.9
Pearce RAAF 21.6 19.5 17.1 18.3 16.8 19.3 20.9 14.8 11.0 14.4 13.0 14.1 18.8 13.8 14.3 13.7 21.8 13.9 19.3 25.8 30.9 27.3 27.2 22.2 20.8 21.2 16.0 17.7 22.1
Perth Airport 21.6 18.9 18.8 18.0 16.4 19.0 21.0 17.4 11.6 15.1 14.5 15.3 17.2 15.0 15.3 13.9 21.6 13.6 19.7 24.6 28.3 26.6 26.6 20.7 21.1 21.3 16.4 18.0 21.5 24.5 17.6
Perth Metro 21.6 20.5 18.3 18.3 17.0 19.1 18.2 14.0 15.9 17.6 18.3 20.3 19.0 15.8 15.7 23.3 15.1 19.9 24.5 27.2 25.5 26.4 23.0 21.7 22.0 17.6 18.3 21.7 24.1 20.8
Rottnest Island 22.4 20.5 18.9 19.2 17.3 20.2 21.7 19.1 19.2 19.4 19.8 19.5 20.3 19.3 16.6 20.3 21.7 17.7 19.9 23.3 24.1 23.6 24.4 23.3 21.6 21.0 18.6 19.3 22.6 24.1 21.7
Swanbourne 22.3 20.6 17.9 17.4 16.9 19.6 22.1 18.4 14.9 18.3 17.1 18.1 20.6 19.6 15.4 18.0 22.6 15.4 20.3 25.3 27.5 26.8 27.4 24.8 21.8 21.8 17.4 18.8 22.2 26.3 20.7
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily rainfall for January 2025
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Anketell - 0.1 - - - - - - - - - - - - - - 1.1 1.2 - - - - - - 1.9 - - - - - -
Bickley - - - - - - - - - - - - - - - - - 3.4 0.2 - - 1.2 - - 5.0 0.2 - - - - -
Bungendore - - - - - - - - - - - - - - - - - 0.2 - - - - - - 5.4 - - - - - -
Chidlow - - - - - - - - - - - - - - - - - 2.0 - - - - - - 0.8
Garden Island HSF - - 0.2 - - - - - - - - - - - - - 1.8 0.4 - - - - - - 0.8 - - - - - -
Gidgegannup - - - - - - - - - - - - - - - - - 2.2 0.2 - - - - - 2.0 - - - - - -
Huntly - - - - - - - - - - - - - - - - - - - - - - - - 4.6 - - - - - -
Jandakot Aero - - - - - - - - - - - - - - 0.4 1.2 - - - - - - 2.4 - - - - - -
Jarrahdale - - - - - - - - - 0.2 - - - - - - 0.4 3.0 - - - - - - 5.4 0.2 - - - - -
Karnet - - - - - - - - - - - - - - - - 1.8 1.7 - - - - - - 4.0 0.2 - - - - -
Karragullen North - - - - - - - - - - - - - - - - - 3.6 - - - - - - 5.1
Maida Vale - - - - - - - - - - - - - - - - 0.6 1.6 - - 0.8 - - - 3.8
Mandurah - - - - - - - - - - - - - - - - 1.2 0.2 - - - - - - - - - - - -
Millendon (Swan Valley) - - - - - - - - - - - 0.6 - 0.6 0.2 - - -
Mount Solus - - - - - - - - - - - - - - - - 0.2 4.4 - - - 1.0 - - 3.0 0.2 - - - - -
Muchea - - - - - - - - - - - - - - - - - 0.6 - - - 0.4 - - 0.8 - - - - - -
Mundaring - - - - - - - - - - - - - - - - 0.4 2.6 - - - - - - 4.0
Pearce RAAF - - - - - - - - - - - - - - - - - 0.8 - - - 1.4 - - 0.4 - - - - -
Perth Airport - 0.2 - - - - - - - - - - - - - - 0.2 1.2 - - - - - - 1.6 - - - - - -
Perth Metro - 1.0 - - - - - - - - - - - - - 0.2 1.6 - - - - - - 2.4 0.2 - - - - -
Pinjarra Refinery - - - - - - - - - - - - - - - - 2.0 0.3 - - - - - - 3.4 - - - - - -
Pinjarra South - - - - - - - - - - - - - - - - 1.6 0.2 - - - - 0.2 - 0.8 - - - - - -
Roleystone - - - - - - - - - - - - - - - - - 4.2 - - - - - - 5.2
Rottnest Island - 0.4 0.2 - - - - - - - - - - - - - 1.6 0.2 - - - - - - 0.6 - - - - - -
Serpentine - - - - - - - - - - - - - - - - 1.4 1.2 - - - - - - 2.0 0.2 - - - - -
Swanbourne - - - - - - - - - - - - - - - - 0.2 0.8 - - - - - 0.8 0.2 - - - - -
Tamala Park (Mindarie) - - - - - - - - - - - - - - - - - - - - - - - - 1.6 - - - - - -
Werribee - - - - - - - - - - - - - - - - - - - - - - - - 0.8 - - - - - -
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with → are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
Rainfalls coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Notes

The Monthly climate summary, usually published in the first week of the following month, lists the main features of the weather in Greater Perth using the most timely and accurate information available on the date of publication; it will generally not be updated.

This summary includes data from observing sites in or near the Greater Perth “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to represent a socio-economic definition of each capital city. This means the greater capital city boundary includes people who regularly socialise, shop or work within the capital city, but live in the small towns and rural areas surrounding the capital city. It does not define the built up edge of the capital city.

This statement has been prepared based on information available on Monday 3 February 2025. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases, the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites are long-term means based on observations from all previous years of record, which vary widely from site to site. They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, average in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.

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