Greater Perth in January 2026

Rainfall

  • Rainfall totals for January were below average at all sites across Greater Perth.
  • January rainfall totals ranged from around 1% to around 35% of average across Greater Perth.

Temperature

  • Mean maximum temperatures for January at some sites across Greater Perth were above average while at others they were below average.
  • January mean maximum temperatures for Greater Perth ranged from 0.6 °C below average at Karnet to 1.7 °C above average at Perth Airport.
  • Mean minimum temperatures for January at most sites across Greater Perth were above average.
  • January mean minimum temperatures for Greater Perth ranged from 0.1 °C below average at Garden Island HSF to 1.0 °C above average at Perth Airport.

Perth Metro

  • Total rainfall for Perth Metro was 1.8 mm, which is 11% of the long-term average of 16.4 mm.
  • The mean daily maximum temperature for Perth Metro was 31.3 °C, which is 0.1 °C below the long-term average of 31.4 °C.
  • The warmest day was 40.7 °C on the 21st, and the coolest day was on the 26th when the temperature reached 23.6 °C.
  • The mean daily minimum temperature for Perth Metro was 18.3 °C, which is 0.1 °C above the long-term average of 18.2 °C.
  • The coldest morning was 13.6 °C on the 27th, and the warmest morning was on the 22nd when the minimum temperature was 22.3 °C.

Extremes in January 2026
Hottest day 42.1 °C at Pearce RAAF on the 2nd
Warmest days on average 34.1 °C at Pearce RAAF
Coolest days on average 26.5 °C at Rottnest Island
Coldest day 20.5 °C at Karnet on the 26th
Coldest night 9.5 °C at Pearce RAAF on the 27th
Coolest nights on average 15.5 °C at Karnet
15.5 °C at Bickley
Warmest nights on average 19.4 °C at Rottnest Island
Warmest night 28.3 °C at Pearce RAAF on the 22nd
Warmest on average overall 25.9 °C at Pearce RAAF
Coolest on average overall 22.9 °C at Rottnest Island
Wettest overall 8.0 mm at Mundaring
8.0 mm at Araluen
Wettest day 8.0 mm at Araluen on the 26th
Strongest wind gust 78.0 km/h at Bickley on the 11th


Summary statistics for January 2026
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
January
2026
Diff
from
average
Highest for
January
2026
Mean for
January
2026
Diff
from
average
Lowest for
January
2026
Total for
January
2026
Average
for
January
Rank of
January
2026
Fraction of
January
average
Bickley 30.9 +0.2 38.4 21st 15.5 0.0 10.3 27th 5.8 19.6 average 30%
Garden Island HSF 27.5 -0.1 38.9 21st 19.0 -0.1 15.3 18th 4.2 11.9 average 35%
Jandakot Aero 32.0 +0.4 41.1 21st 17.6 +0.6 11.2 27th 0.6 14.7 average 4%
Karnet 30.1 -0.6 37.2 21st 15.5 +0.1 10.9 27th 5.0 17.6 average 28%
Mandurah 30.1 +0.4 38.6 20th 19.2 +0.2 14.9 27th 1.0 14.0 average 7%
Millendon (Swan Valley) 33.4 41.1 21st 17.6 10.7 27th 3.0
Pearce RAAF 34.1 +0.5 42.1 2nd 17.9 +0.8 9.5 27th 1.6 9.7 average 16%
Perth Airport 33.6 +1.7 41.6 21st 18.1 +1.0 12.0 27th 0.2 10.3 low 2%
Perth Metro 31.3 -0.1 40.7 21st 18.3 +0.1 13.6 27th 1.8 16.4 average 11%
Rottnest Island 26.5 -0.2 36.2 21st 19.4 +0.2 15.9 18th 1.0 13.7 average 7%
Swanbourne 29.4 -0.5 41.2 21st 18.7 +0.3 13.7 27th 0.2 16.8 low 1%

Daily maximum temperatures for January 2026
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 34.2 38.1 34.4 32.5 34.3 31.2 29.8 26.9 26.5 27.4 31.4 32.8 30.8 30.0 35.2 32.7 24.9 29.1 33.6 37.3 38.4 32.3 24.9 27.6 23.8 21.0 25.8 29.0 33.8 35.6 33.3
Garden Island HSF 31.8 28.1 25.6 27.4 24.9 24.0 23.9 22.9 25.5 31.1 30.6 24.2 25.7 31.3 31.7 28.4 25.2 23.8 29.4 38.3 38.9 25.0 22.9 24.1 25.7 23.0 23.0 26.6 29.6 26.4 34.4
Jandakot Aero 36.9 38.5 33.2 32.6 32.5 29.6 29.5 28.0 29.2 30.9 34.2 33.0 30.4 33.0 36.0 33.0 26.4 28.0 35.5 39.9 41.1 33.5 26.5 27.6 26.9 24.2 25.8 34.8 36.2
Karnet 32.2 29.9 30.0 35.0 33.4 24.5 29.0 33.0 36.5 37.2 24.4 26.6 24.2 20.5 24.4 29.2 33.7 34.8 32.0
Mandurah 33.9 35.0 33.6 31.0 29.9 27.8 27.4 25.0 28.4 31.4 34.7 29.6 29.7 32.9 33.9 30.4 25.4 26.4 32.6 38.6 38.4 28.1 24.8 25.2 24.4 23.0 25.1 28.2 30.1 31.9 35.6
Millendon (Swan Valley) 37.8 40.3 36.4 35.6 35.5 32.6 31.8 28.9 29.1 30.6 34.5 34.7 31.3 32.8 37.0 35.9 27.9 30.5 36.5 39.6 41.1 35.4 27.1 30.5 28.2 24.5 27.8 32.0 36.4 38.3 36.3
Pearce RAAF 38.6 42.1 36.4 37.1 36.2 32.9 32.4 30.4 29.6 31.0 35.6 31.6 33.7 38.7 36.3 28.5 31.0 36.7 40.5 41.7 36.4 27.5 30.9 28.8 25.3 27.3 32.1 37.3 39.5 37.0
Perth Airport 38.4 40.3 35.5 34.7 35.4 32.4 32.1 29.6 29.5 30.5 34.4 35.1 31.4 33.4 38.2 34.8 28.8 30.4 37.0 40.3 41.6 34.3 28.4 29.4 27.0 25.8 28.6 32.1 36.4 37.9 36.8
Perth Metro 37.3 37.2 32.7 32.5 31.3 29.5 29.3 26.3 27.6 30.1 34.1 31.8 28.0 32.5 35.7 32.4 26.2 26.7 34.8 39.2 40.7 32.9 25.2 27.0 26.5 23.6 25.3 30.3 34.1 34.7 35.7
Rottnest Island 31.2 29.8 26.7 28.0 25.2 24.3 24.2 24.3 23.7 29.1 27.2 25.0 25.1 27.1 28.4 29.0 24.8 23.1 26.3 32.3 36.2 25.4 23.7 23.9 25.7 23.8 22.6 24.9 28.0 26.0 27.7
Swanbourne 36.1 31.7 28.7 28.6 27.8 26.5 26.6 25.2 27.0 30.4 33.0 26.7 26.5 31.4 33.2 28.3 25.6 24.9 32.6 39.2 41.2 28.7 24.8 25.8 26.2 24.0 24.2 29.0 32.8 29.7 35.0
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 2026
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 16.8 18.0 19.0 17.5 18.8 16.4 14.7 14.7 12.5 12.5 12.1 18.8 12.8 14.0 14.0 19.8 15.8 11.7 13.8 15.5 16.3 24.5 14.5 13.1 14.0 14.1 10.3 12.1 14.7 19.6 16.8
Garden Island HSF 19.9 20.9 22.1 20.1 21.6 20.3 18.5 19.0 16.4 16.5 16.3 21.7 18.2 17.9 18.1 21.7 20.2 15.3 17.6 19.5 21.3 21.1 19.7 17.7 19.8 18.1 15.6 15.9 18.7 18.3 20.7
Jandakot Aero 16.8 21.0 21.5 21.0 17.1 17.6 17.0 15.6 15.0 16.0 15.6 22.4 15.1 17.1 17.4 22.7 19.6 11.8 15.3 19.2 20.4 21.2 17.6 13.1 13.9 18.6 11.2 19.9 20.4
Karnet 18.1 12.8 14.4 14.5 21.1 14.1 11.5 14.7 15.2 17.5 16.0 12.3 13.0 15.0 10.9 13.9 15.0 21.1 16.8
Mandurah 20.9 21.7 21.5 21.9 20.2 20.2 17.9 18.4 16.1 16.5 16.1 21.0 18.2 17.8 18.0 23.6 20.1 15.8 17.7 19.9 20.7 22.7 19.4 16.6 19.9 19.4 14.9 15.8 19.0 21.8 21.1
Millendon (Swan Valley) 15.5 20.9 22.1 19.7 15.5 18.1 18.1 16.1 16.2 16.0 16.3 21.3 13.9 17.4 17.8 22.1 19.3 13.0 14.0 19.5 20.6 27.0 18.9 12.7 13.4 15.4 10.7 16.2 17.5 19.0 20.5
Pearce RAAF 17.3 21.8 23.0 19.2 15.7 17.5 18.1 17.3 16.4 16.1 17.1 14.2 17.8 17.8 20.4 18.0 13.7 14.5 20.4 21.2 28.3 18.5 13.3 14.4 16.1 9.5 16.3 17.6 20.5 20.9
Perth Airport 15.5 21.8 21.7 20.5 17.6 18.2 18.1 17.0 16.0 16.2 16.0 22.8 15.3 17.0 17.8 22.8 19.8 15.0 15.8 19.5 20.1 25.7 18.5 15.8 13.5 17.2 12.0 15.9 17.8 18.7 20.6
Perth Metro 17.1 22.2 22.3 20.2 19.5 19.5 18.3 16.4 16.4 16.2 16.1 20.5 16.5 17.6 17.9 21.5 19.8 14.7 16.2 19.3 20.4 22.3 18.8 16.3 16.4 17.2 13.6 16.0 18.4 18.7 20.8
Rottnest Island 21.1 21.5 21.6 21.6 20.7 20.8 18.7 19.4 16.5 16.5 16.7 21.6 18.8 18.2 18.2 21.3 19.4 15.9 18.5 20.1 21.7 23.7 19.6 18.3 18.6 16.3 16.3 16.7 19.6 21.1 20.9
Swanbourne 20.2 20.0 21.6 21.3 19.9 19.6 17.6 17.2 15.8 16.3 16.2 22.1 16.9 17.8 18.3 21.3 19.6 14.5 16.7 20.2 21.1 23.4 18.3 15.5 19.0 18.8 13.7 16.2 18.7 19.9 20.6
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 2026
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 - - - - - - - - - - - - - - - - - - - - - - - - - 1.0 0.9 - - - -
Araluen - - - - - - - - - - - - - - - - - - - - - - - - - 8.0
Bickley - - - - - - - - - - - 0.8 - - - - - - - - - - - - 0.2 4.8 - - - - -
Bungendore - - - - - - - - - - - - - - - - - - - - - - - - - 0.6 1.0 - - - -
Chidlow - - - - - - - - - - → 1.0 - - - - - - - - - - - - → → 4.0
Garden Island HSF - - - - - - - - - - - - - - - - - - - - - - - - - 2.2 2.0 - - - -
Jandakot Aero - - - - - - - - - - - - - - - - - - - - - - - - - 0.6 - - - -
Jarrahdale - - - - - - - - - - - - - - - - - - - - - - - - - 1.0 0.4 - - - -
Karnet - - - - - - - - - - - - - - - - - - - - - - - - - 4.8 0.2 - - - -
Karragullen North - - - - - - - - - - - - - - - - - - - - - - - - - 1.0
Maida Vale - - - - - - - - - - - - - - - - - - - - - - - - - 1.8
Mandurah - - - - - - - - - - - - - - - - - - - - - - - - - 1.0 - - - - -
Millendon (Swan Valley) - - - - - - - - - - - 1.0 - - - - - - - - - - - - 1.6 0.4 - - - -
Mount Solus - - - - - - - - - - - - - - - - - - - - - - - - - 3.8 0.2 - - - -
Muchea - - - - - - - - - - - - - - - - - - 0.8 - - - - -
Mundaring - - - - - - - - - - - 1.6 - - - - - - - - - - - - - 6.4
Pearce RAAF - - - - - - - - - - - - - - - - - - - - - - - - 1.6 - - - - -
Perth Airport - - - - - - - - - - - - - - - - - - - - - - - - - 0.2 - - - - -
Perth Metro - - - - - - - - - - 0.4 - - - - - - - - - - - - - 1.2 0.2 - - - -
Pinjarra South - - - - - - - - - - - - - - - - - - - - - - - - - 0.4 0.2 - - - -
Rottnest Island - - - - - - - - - - - - - - - - - - - - - - - - - - 1.0 - - - -
Serpentine - - - - - - - - - - - - - - - - - - - - - - - - - 1.4 - - - - -
Swanbourne - - - - - - - - - - - - - - - - - - - - - - - - - - 0.2 - - - -
Tamala Park (Mindarie) - - - - - - - - - - - 0.2 - - - - - - - - - - - - - 2.0 - - - -
Werribee - - - - - - - - - - - - - - - - - - - 1.2 - - - - -
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 Sunday 1 February 2026. 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 available years of record, excluding the current year. The length of record can vary widely from site to site. Averages are not shown for sites with fewer 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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