Siena Weather, When to Go and Climate Information

(Siena, Tuscany, Italy)

Picture of the DuomoLocated in the beautiful Italian region of Tuscany, Siena enjoys fine weather for the majority of the year. Its temperate climate means that extremes of temperatures are generally avoided. Rainfall in Siena tends to be concentrated into the early spring and the autumn.

Tuscany is a region with diverse terrain and so the climate can vary from one part to another. Visitors who intend to explore the countryside beyond the city of Siena should take this into account.

Further view of the beautiful Duomo

Seasonal Climate Variations / When to Go

The spring climate arrives relatively early in Siena. March is a lovely time of year to visit, particularly for those who like to admire the beautiful Tuscan scenery. Temperatures are fairly comfortable, although during April and early May the weather does tend to turn rather wet.

July and August are by far the warmest and sunniest months of the year. Summer temperatures vary between 27°C / 80°F and 32°C / 90°F. As temperatures reach their peak in Siena, it can sometimes seem stiflingly hot and humid to those with a busy sightseeing itinerary. On the other hand, the evenings are pleasantly warm and perfect for al fresco dining.

The early autumn climate offers a great time to visit Siena and is ideal for those who want to avoid the heat. In October and November, temperatures still feel pleasantly warm, and there are plenty of blue skies to enjoy. What's more, the summer crowds have abated. Average temperatures are around 21°C / 70°F to 24°C / 75°F.

Another Duomo photographAs late autumn turns to winter, visitors to Siena can look forward to crisp autumnal days. Night-time temperatures begin to fall quite dramatically. It's worth noting that at this time of the year, there's usually a fair amount of rain, too, so visitors should come prepared for changeable weather.

A Siena winter can feel cold, but not excessively so, with an average temperature of 10°C / 50°F. There is still the opportunity to enjoy some sunny days, although it can turn wet at times.

Siena Weather and Climate Chart (Averages)



9°C / 48°F
2°C / 36°F


11°C / 52°F
3°C / 37°F


15°C / 59°F
4°C / 39°F


21°C / 70°F
7°C / 45°F


23°C / 73°F
11°C / 52°F


28°C / 82°F
14°C / 57°F


31°C / 88°F
18°C / 64°F


30°C / 86°F
16°C / 61°F


26°C / 79°F
15°C / 59°F


21°C / 70°F
10°C / 50°F


15°C / 59°F
5°C / 41°F


11°C / 52°F
3°C / 37°F