Winter in Perth, and more generally in Australia, is the season when it rains the most, which means how you drive and look at your car would be different from every other season. Rain and dirty roads are affecting your vision, the reaction time and the capacity of your car to slow down.
Depending on this, you can increase the braking interval you usually leave from 2 seconds to 4 seconds, and avoid abrupt braking to prevent skidding. Checking that the tyres 'thread is at least 15 mm deep and holding their pressure up for extra road grip is also a good time to.
infographic by: www.perth4wd.com.au