The highest day temperature in July 2025 was 69°F. The lowest night temperature was 43°F. The average values for day and night temperatures during July were 61.1°F и 53.7°F respectivly.

The average sea surface temperature in July 2025 for Perth was 64.9°F. The maximum and minimum values were 63.6°F and 67.0°F respectively.

You can expect various weather conditions during July. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in July for Perth is 3.3 in. It makes july the most rainy month of the year.

The average wind speed in July is 10.0 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Perth in July is 5.7 hours.