As in most areas of northwest Europe, the weather here is frequently rainy and varies day to day throughout the year. During spring, a fine warm spell may last for weeks—or a stretch of cool, unsettled weather may prevail. Showers are common but sprinkles rarely turn heavy. Daytime temperatures are generally mild. In summer, warm periods may last for weeks. By autumn, overcast skies occur more frequently, leading to heavier rains and colder temperatures.