Perth weather. The average minimum temperature (usually the minimum temperature is noted during the night) in Perth in July is 8.0°C (46.4°F). Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. What is the weather like in Perth? Perth enjoys hot, dry summers and mild winters.During summer rain is unusual, but winter can bring downpours of rain and thunderstorms. Humidity July is the most humid month in Perth, with an average relative humidity of 57%.

July, like June, in Perth, Australia, is another comfortable winter month, with average temperature varying between 18.4°C (65.1°F) and 7.7°C (45.9°F). Perth, Australia: Annual Weather Averages January is the hottest month in Perth with an average temperature of 24.5°C (76°F) and the coldest is July at 13°C (55°F) with … Temperature July is the coldest month, with an average high-temperature of 18.4°C (65.1°F) and an average low-temperature of 7.7°C (45.9°F). Plan ahead with our information on temperature and rainfall. Average Weather during July in Perth (Western Australia), Australia. July falls in the rainy season with an average precipitation of 158mm (6.2in). Perth has more hours of sunshine than any other Australian state capital, giving you opportunities to combine studying with your favourite activities. The average sea surface temperature in July 2019 for Perth was 66.3°F.The maximum and minimum values were 65.2°F and 67.6°F respectively. Summer (December – February) Summer in Perth is hot and dry with very little rainfall.Average temperatures range from 17.5 - 30°C (63.5 - 86°F). Summers in Perth are hot and dry, with average temperatures of 31°C in the hottest month of February.