Sparwood: when to go? Whether you love the heat or the cold, if you're planning a trip here, it could be useful for you to know: July, has temperatures that can reach 26°C, it's the hottest month at this touristic destination. December instead is the coldest month, where temperatures can trop to -3°C. For people that love the rain, December is the rainiest month where we can predict up to 15 dais of rain.