Southern England isn’t known for the finest weather in the world, but Dover in fact has a generally pleasant year round climate. It is typically cool, but during the height of summer the weather can actually be quite warm and very sunny. No doubt this weather helped attract the various settlers and invaders to these shores.
The summer months from June through September can be warm, and it isn’t uncommon for daytime highs in the uppers 80s, with the lows in the mid to upper 60s. Summer does tend to be the rainy season and the late summer and early fall can be very wet at the English Channel.
The fall cools off a bit, and by things do tend to stay fairly wet… not that there is ever really a “dry season” along the English Channel. The winter can be cold, and it can reach freezing at night, but the area seldom has much, if any, snow fall.
Spring arrives early to this part of England too, and by the middle of March the temperatures generally start to pick up, while April and May offer numerous lovely spring days. In Dover there is as great a chance of sun as there is rain, but with numerous attractions, including the famous White Cliffs, with Dover Castle standing guard, there is always something to see and do.