Planning for the weather is a good way to make your trip to Sneem relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are March and January, with an average of 7°C. The rainiest months in Sneem are December, November, October and January, with each month seeing an average of 188 mm of rainfall.