Venice weather is strongly infuenced by the sea. Venice is located by the sea, or rather on the sea, so the warm water of the Mediterranean keep its climate moderate. Venice weather doew not include many huge surprises.
Looking at the average temperatures and number of rainy days it seems that Venice is pleasant and welcoming all year round. To an extent it is so, but there are two things you should remember:
First, Venice has no sewer system. They are working on it, but in the meantime, the odor of the canals during the summer can be quite unpleasant.
A second thing to remember is the sad fact that Venice is covered by water more and more often. In some days it is impossible to walk in Piazza San Marco, and people have to walk on elevated platforms to pass the square. This happens more often during winter.
You can see a computer generated forecast of the water levels in Venice , or call a number on the same page for current levels.
Having sayd that, I will give you the average temperatures:
When your trip comes closer you may want to see the actual forecast: Hit CTRL-D to bookmark this page