Toward the end of spring, temperatures can get quite warm and you can enjoy outdoor dining and swim in the sea or hotel pool. The temperature at night can get quite chilly though, and will drop to about 8°C (46°F). USA Today's Weather site has nice information on average weather in Italy.

In addition, at this time there begin to bloom the first citrus, olive, Fig, pomegranate. What kind of temperatures and landscapes can you expect? Spring in Italy Springtime is a beautiful season in Italy, especially in the months of April and May. Most parts of Italy get less rainfall in spring than in fall.

When is spring? Spring Weather and Climate in Italy Spring is generally pleasant in most parts of Italy although rain, and even snow in early spring is possible. Average temperatures in Spring. In March, the spring blossoms start to appear, but you can expect the nights and early mornings to still be a bit nippy. The air temperature in Italy in spring is +15-20 °C (59-68 °F).
Whereas many parts of Italy are still downright cold (and often rainy) in February, by March you’re more likely to see more sunny days (even if you’re still wearing a coat) even in the northern parts of the country. Spring weather in Italy As we mentioned above, Italy’s spring months include March, April and May. Temperature in spring. Rome, Italy: Annual Weather Averages July is the hottest month in Rome with an average temperature of 25.5°C (78°F) and the coldest is January at 8°C (46°F) with the most daily sunshine hours at 11 in July. March, by contrast, can be as chilly and damp as February.

Venice, Italy : weather in spring. In March, crowds will start to pick up, temperatures will still be cold, and springtime rains may start to fall. Spring Weather in Italy I’m defining spring as the months of March, April, and May in Italy, but because of Italy’s Mediterranean climate (and, probably, climate change in general), May can be as hot as June or July these days. Variable Weather. The average daytime temperatures in spring range from around 12°C (53°F) in the earlier part of the season to about 21°C (70°F) as the summer approaches. In the Alps such animals as bears, ROE deer, deer, chamois, and in the highlands — grouse and the hazel grouse. According to their stats for Florence and Rome, April is a bit warmer … Venetians define spring as being the months between the beginning of March and the end of May.

Official figures - and our own experience of visiting Rome in the Spring bears this out - show the average daytime temperatures in April at around 20° Centigrade (68° Fahrenheit).