Siena

What is the climate like in Siena?

The best time to visit Siena is typically June – August, with trip comfort peaking in July (8.6/10). Siena is warmest in August, when daily highs average 88°F (31°C), and coolest in January, when lows fall to about 36°F (2°C). The wettest month is typically November and the driest is July; the year sees roughly 36 in (909 mm) of precipitation.

• Best time to visitJune – August — comfort peaks in July (8.6/10)
• Warmest monthAugust — average high 88°F (31°C)
• Coolest monthJanuary — average low 36°F (2°C)
• Wettest monthNovember (5.0 in (126 mm))
• Driest monthJuly (1.2 in (29 mm))
• Annual precipitation36 in (909 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromGrosseto, 66 km away (1964-2025)