Summer
Vendee is one of the sunniest places in France with nearly 2500 annual sunshine hours. Between June and September daily highs are regularly in the 20s. July and August are the hottest months with an average temperature of 20-30°C varying between highs in the mid 20s and lows in the low to mid teens. Summer temperatures are in general very comfortable; it rarely gets too hot for comfort especially by the sea, although occasional summer heat waves can bring temperatures in the 30s. Rainfall levels are very low. June, July and August are the driest months with around 40mm average monthly rainfall. From September, rainfall starts to build a little. Days in peak summer enjoy an average of up to 9 sunshine hours.
Autumn
Early autumn can enjoy plenty of good weather so once the summer crowds have dispersed, this can be a great time to visit. However, it can be a little unpredictable. As the season progresses it becomes cooler and wetter and at the end of autumn chilly days with grey, spitting skies are quite frequent.
In October you can enjoy some warm sunny weather with temperatures in the high teens, but temperatures begin to dip into single figures towards the end of the month. November is one the wettest months of the year with an average of 90mm rainfall. In terms of temperature it’s quite cool with temperatures more often than not in single figures. By the end of the month you can certainly feel the onset of winter.
Winter
While winters can certainly be chilly in Vendee there is usually an absence of really cold temperatures, especially in the coastal areas. This is thanks mainly to the influence of the warming currents from the Gulf Stream. Winter temperatures average 5°C in the coldest months of December and January, with highs around 8C and lows around 2°C. Freezing temperatures can occur but they are not common. You are much more likely to get frosts and snowfall the more you move inland. Vendee has regional variations in weather conditions, the most notable of which is around Mont Mercure. Higher elevations always mean cooler temperatures and the peak of Mont Mercure is the highest in the district. In winter, snow caps the mountain.
Winter is the wettest season of the year and damp, cloudy days are quite normal. December and January both average more than 80mm of rainfall; February sees just over 70mm.
Spring
The cold and clouds gradually give way to heat and sunshine. The transition from winter to summer is characterised by unpredictability; similar to weather found in the UK, Vendee can experience a cocktail of conditions throughout each day. While night time temperatures remain cool, the average high temperature rises to 12°C in March, 14°C in April and 18°C in May. From the beginning of April it can be hot and sunny one moment, then grey, cold and wet the next. Rainfall gradually decreases throughout the season but showers can still occur every few days. April and May enjoy an excellent average of 7 sunshine hours per day. Late spring is a very good time to visit; you can take advantage of some fine weather before the summer crowds arrive.
The temperatures in the Vendee area range from 3.4 to 25.5 (Celcius). And the Rainfall in Vendee varies from 93.0 to 279.0 (mm/month).