Although weather is just one factor, it can really affect your travel plans, especially when you are planning a longer stay in Helmville. The hottest months are usually July and August, with an average temperature of 16°C, while the coldest months are December and February, with an average of -5°C. The snowiest months in Helmville are January, February, October and April, with each month seeing an average of 26 cm of snowfall.