Planning for the weather is a good way to make your trip to Waterfall relaxing and enjoyable, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 12°C, while the coldest months are February and January, with an average of 3°C. The snowiest months in Waterfall are February, January, March and April, with each month seeing an average of 19 cm of snowfall.