Because Ambleside is in the northern part of England, it has a much milder climate than the rest of the country. In the winter, they experience a lot of cold days with cloud cover. There are many rainy and snowy days. However, in the summer time, the temperatures are very pleasant, usually hovering around 18 degrees Celcius. There are many sunny days, and you are sure to enjoy your stay. Because of this, the best time of year to visit is probably around the spring and summer. You could visit during the fall and winter, but the weather won't be as agreeable and you might not be able to do all of the activities that you want to do. If you want to find out the local weather, you can click here and find out the five day forecast. Overall, you should have warm clothing when you visit Ambleside. Even in the summer, you should bring a pair of pants and a light jacket for later on at night. In the winter, you should definitely pack warm clothes.