Normandy has a maritime climate with warm summers and mild winters.
Rain is a part of the climate all year round—with winter seeing more rain than summer. The ongoing rain isn’t enough to spoil a vacation most of the time and it does have a benefit— the nature is incredibly lush and green. Winter does see the occasional snow and frost as well, but the climate is generally fairly mild even in the winter months.
Christmas /New Year and the February half term are both popular times to visit the Haras du Gazon – the gites are cosy and many tourist attractions are open throughout the year. For example it is an ideal time to tour the Normandy beaches, Bayeux tapestry and Falaise castle which are atmospheric without the crowds of the summer.
You could also take the opportunity to consider a day trip of the sights on a private guided tour. Normandy Sightseeing tours have some good options: