When to go · Australia
When to go to Perth
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When to go
What the averages say
Every month in Perth averages a high between 18°C and 32°C with under 150 mm of rain.
Of those months, it is also dry (under 50 mm of rain) and not humid in October to April.
- The warmest month is February (27°C) and the coolest July (18°C). The wettest is July (128 mm) and the driest December (12 mm); about 659 mm of rain falls in a year.
How these sentences are worded
Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.
The year at a glance
- Mild to warm and dry
- Mild to warm, humid or showery
- Hot
- Cool
- Wet
- Cold
- JanMild–warm, dry
- FebMild–warm, dry
- MarMild–warm, dry
- AprMild–warm, dry
- MayMild–warm, mixed
- JunMild–warm, mixed
- JulMild–warm, mixed
- AugMild–warm, mixed
- SeptMild–warm, mixed
- OctMild–warm, dry
- NovMild–warm, dry
- DecMild–warm, dry
Month by month
Every month in Perth
| Month | High | Low | Rain | Humidity | Cloud | Sunlight (kWh/m²/day) | High in Dubai | What it is like |
|---|---|---|---|---|---|---|---|---|
| January | 26°C | 19°C | 18 mm | 65% | 33% | 8.2 | 23°C | Mild to warm and dry |
| February | 27°C | 20°C | 17 mm | 65% | 37% | 7.3 | 24°C | Mild to warm and dry |
| March | 26°C | 19°C | 20 mm | 65% | 40% | 6.1 | 27°C | Mild to warm and dry |
| April | 23°C | 18°C | 34 mm | 69% | 51% | 4.5 | 31°C | Mild to warm and dry |
| May | 21°C | 16°C | 84 mm | 69% | 54% | 3.3 | 35°C | Mild to warm, humid or showery |
| June | 19°C | 15°C | 113 mm | 71% | 59% | 2.7 | 37°C | Mild to warm, humid or showery |
| July | 18°C | 14°C | 128 mm | 73% | 60% | 2.9 | 39°C | Mild to warm, humid or showery |
| August | 18°C | 14°C | 106 mm | 74% | 58% | 3.8 | 39°C | Mild to warm, humid or showery |
| September | 18°C | 14°C | 70 mm | 73% | 53% | 5 | 37°C | Mild to warm, humid or showery |
| October | 20°C | 15°C | 32 mm | 73% | 45% | 6.5 | 34°C | Mild to warm and dry |
| November | 22°C | 16°C | 25 mm | 69% | 40% | 7.8 | 29°C | Mild to warm and dry |
| December | 25°C | 18°C | 12 mm | 65% | 36% | 8.4 | 25°C | Mild to warm and dry |
The Dubai column is Dubai's mean daily high, for comparison.
Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.
From the journal
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