There's no real summer and winter in Ecuador, with weather patterns varying according to geography, and temperatures determined more by altitude than by season or latitude. As a general rule, the warmest and driest months in the sierra are June to September, though this is complicated by various microclimates found in some areas. Outside these months, typical sierra weather is characterized by sunny, clear mornings and cloudy, often wet, afternoons. In the Oriente , you can expect it to be warm, humid and rainy throughout the year, though there are often some short breaks from the daily rains between August and September and December to February. In the lowland areas it can get particularly hot on clear days, with temperatures easily topping 30°C. The coast has the most clearly defined wet and dry seasons, with the best time to visit being from December to April, when you'll get frequent showers but also clear blue skies and warm weather. From May to November, the southern coast , in particular, is often overcast and relatively cool, with less chance of rainfall. The Galapagos climate sees hot, sunny days interspersed with the odd heavy shower from January to June, and dry and overcast weather for the rest of the year, when the garua mists are also prevalent. It's worth noting that El Nino years can bring enormous fluctuations in weather patterns on the coast and at the Galapagos archipelago, when levels of rainfall can be many times the norm.