Planning for the weather is a good way to make your trip to Picton relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 19°C, while the coldest months are January and February, with an average of -3°C. The snowiest months in Picton are January, March, February and December, with each month seeing an average of 28 cm of snowfall.