These two charts show the monthly average temperature and precipitation for Vancouver, British Columbia, Canada which is a city located in a temperate rain forest. The top one is average temperature and the bottom one is average precipitation. As you can see the hottest months are July and August with an average of 23∘C (73.4 ∘F). The coldest month is December with an average of 7∘C (44.6∘F). The wettest months are November, December, and January. The driest months are July and August. If you visit this area I suggest you go during the summer months of June, July, and August because they are the warmest and the driest. When you visit you should pack rain gear like umbrellas, raincoats, and rain boots. Depending on the weather, shorts and t-shirts in summer and pants and a warm jacket for winter. Spring and fall you should be fine in a pants and a t-shirt and maybe a light jacket.