You should not receive a booster vaccine if you had a life threatening allergic reaction after the first shot. Keep track of any and all side effects you have after receiving this vaccine. If you ever need to receive a booster dose, you will need to tell your doctor if the previous shot caused any side effects.
On average, Santorini in December receives an average of 74.5mm of rainfall divided between 11 wet days, whilst January is subject to an average of 70.5mm of rainfall which is spread out between ten rainy days.
A very reliable site for weather forecast in Greece is www.meteo.gr , you can click on Santorini on the map, then weather forecast will come up in Greek. There is an English version button and voila! I don't quite get all the weather questions...there are so many resources on the net.