July weather forecastPerth, Australia

The central business district of Perth, Australia

July

Weather in July

July in Perth grows colder, becoming the epitome of winter in the city. With the lowest sea temperatures registered at 19°C (66.2°F), a chilly blanket covers Perth during this month. The city experiences its highest rainfall of the year, 145mm (5.71"), providing nourishment to the abundant greenery. The colder days prevail, yet Perth residents take it in stride, venturing out to enjoy various winter carnivals and festivals. The brightly lit city under the winter night sky presents a picturesque view, very different from the summer's vibrant landscapes.

Temperature

July, with its high-temperature average of 18.4°C (65.1°F) and a low-temperature average of 7.7°C (45.9°F), is the coldest month.

Humidity

With an average relative humidity of 57%, July is the most humid month.

Rainfall

July is the month with the most rainfall in Perth. Rain falls for 16.9 days and accumulates 145mm (5.71") of precipitation.

Sea temperature

In Perth, the average seawater temperature in July is 20°C (68°F).
Note: For most, swimming in 20°C (68°F) is not a pleasant experience. As the temperature falls from 21°C (69.8°F) to 15°C (59°F), controlling one's breathing becomes more difficult.

Daylight

The average length of the day in July in Perth is 10h and 17min.
On the first day of July, sunrise is at 7:17 am and sunset at 5:23 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 5:40 pm AWST.

Sunshine

In July, the average sunshine in Perth is 6.1h.

UV index

June and July, with an average maximum UV index of 3, are months with the lowest UV index in Perth. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 3 in July leads to these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.

Updated: Jan 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The coldest period in Perth, Australia, is July, when temperatures fluctuate between an average high of 18.4°C (65.1°F) and a low of 7.7°C (45.9°F).

During July, Perth experiences an average high-temperature of 18.4°C (65.1°F) and a low-temperature of 7.7°C (45.9°F).

The most humid month is July, with an average relative humidity of 57%.

In Perth, Australia, the average relative humidity in July is 57%.

July is the month with the most rainfall. Rain falls for 16.9 days and accumulates 145mm (5.71") of precipitation.

In July, the rain falls for 16.9 days. Throughout July, 145mm (5.71") of precipitation is accumulated.

In July, the average sea temperature in Perth is 20°C (68°F). For swimming, a surface water temperature of 20°C (68°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

In July, the average day length in Perth is 10h and 17min.

In July, on the first day of the month, sunrise is at 7:17 am and sunset at 5:23 pm. On the last day of the month, in Perth, Australia, sunrise is at 7:05 am and sunset at 5:40 pm AWST.

In July, the average sunshine duration in Perth is 6.1h.

The months with the lowest UV index in Perth, Australia, are June and July, with an average maximum UV index of 3.

In Perth, Australia, the average daily maximum UV index in July is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

19.4°C

18.4°C

19.1°C

Average low temperature

Average humidity

Average rainfall

Average rainfall days

15.2

16.9

15.7

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in July
Perth, Australia

Average high temperature in July: 18.4°C

The warmest month (with the highest average high temperature) is February (31.7°C).
The month with the lowest average high temperature is July (18.4°C).

Average low temperature in July: 7.7°C

The month with the highest average low temperature is February (18.4°C).
The coldest month (with the lowest average low temperature) is July (7.7°C).

Average humidity in July
Perth, Australia

Average humidity in July: 57%

The month with the highest relative humidity is July (57%).
The month with the lowest relative humidity is February (38%).

Average rainfall in July
Perth, Australia

Average rainfall in July: 144.7mm

The wettest month (with the highest rainfall) is July (144.7mm).
The driest month (with the least rainfall) is February (8.8mm).

Average rainfall days in July
Perth, Australia

Average rainfall days in July: 16.9 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is February (2.1 days).

Average sea temperature in July
Perth, Australia

Average sea temperature in July: 20°C

The best month for swimming (with the highest average sea temperature) is March (23.4°C).
The coldest months (with the lowest average sea temperature) are September and October (19°C).

Average daylight in July /
Average sunshine in July
Perth, Australia

Average daylight in July: 10h and 18min

The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).

Average sunshine in July: 6h and 6min

The months with the most sunshine are January and December (Average sunshine: 11h and 30min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).