Tinos climate is quite typical in terms of being Mediterranean. The winters are really mild here and the summers can get really hot.
Summer: The city faces summers between June and August and the weather during this time gets really hot and dry. This is basically off-season for tourists in Tinos. August is the hottest month in Tinos with an average temperature of 29 Degree Celsius.
Spring: The months of March, April and May is when the season of spring arrive and is a very pleasant time to be in the city. You can actually do most activities and the weather would not be a hindrance at this time.
Autumn: Autumn is mild and cool and lasts from October to November but the winter is around the corner and the weather starts to get slightly chilly.
Winter: The season of Winter actually begins slightly in November but gets the coldest in January with temperatures falling down to 10 degree Celsius. Winter lasts up till the month of February and it is better to avoid this place during these months.
So, the best time to visit Tinos is between March to May and October to November.