COVID-19 (Coronavirus) may impact your travel plans and the data on our site. Stay safe, and always check official travel advice before you book.

Best time to visit Siena, Italy

Our verdict

The best time to visit Siena is April-June

Siena can be visited year-round, but based on the ideal climate conditions, cost of travel, and avoiding peak holiday periods, April-June is the best time to go.

In summer, the average maximum temperature is around 30℃ (87℉), but temperatures can sometimes reach as high as 33℃ (92℉) on the hottest days of the year. In the winter months, it can get down to as low as -1℃ (30℉) at night.

If you’re keen to work on your tan in Siena, you’re most likely get the longest days between sun-up and sun-down around July. You don’t want to get wet on your holiday, do you? Well if you’re trying to avoid the rain, then steer clear of Siena in November. Head over there in August instead if you want to increase your chances of not being rained on.

If you want to learn everything you need to know about the best times to travel to Siena, the weather and stats by month and so much more, make sure you keep reading. Once you’re ready, we’ve included a bunch of our favourite online booking tools to help you find the best deals on flights, accommodation and anything else you’ll need for your trip. Happy reading!

Warmest month

August

Least rainfall

August

Most daylight

July

Let someone else do the hard work.
Map pin icon
Where to?
Siena

Siena seasons

Before you continue, it’s important to know when the seasons are in Siena as they might be different to yours depending on where in the world you’re travelling from. Siena is in the Northern Hemisphere, so the seasons fall during these months:

SeasonMonths
Summer June to August
Autumn/fall September to November
Winter December to February
Spring March to May

Average temperatures in Siena

If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Siena for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.

Siena climate by month

If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Siena for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.

Jump to:

JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC

Siena in January

  • Average temperature: 5℃ (41℉)
  • Average high temperature: 8℃ (47℉)
  • Average low temperature: 2℃ (35℉)
  • Average humidity: 82%
  • Average sunny days: 17 days
  • Average rainfall: 31mm (1") over 12 days
  • Average snow days: 1 days
17 days
of pure sunshine
12 days
of showers or rain

What to pack: If you’re heading to Siena in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Siena in February

  • Average temperature: 6℃ (42℉)
  • Average high temperature: 10℃ (50℉)
  • Average low temperature: 2℃ (36℉)
  • Average humidity: 81%
  • Average sunny days: 15 days
  • Average rainfall: 28mm (1") over 11 days
  • Average snow days: 1 days
15 days
of pure sunshine
11 days
of showers or rain

What to pack: If you’re heading to Siena in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Siena in March

  • Average temperature: 9℃ (47℉)
  • Average high temperature: 13℃ (56℉)
  • Average low temperature: 4℃ (39℉)
  • Average humidity: 78%
  • Average sunny days: 17 days
  • Average rainfall: 27mm (1") over 12 days
  • Average snow days: 1 days
17 days
of pure sunshine
12 days
of showers or rain

What to pack: If you’re heading to Siena in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Siena in April

  • Average temperature: 12℃ (54℉)
  • Average high temperature: 18℃ (64℉)
  • Average low temperature: 7℃ (44℉)
  • Average humidity: 76%
  • Average sunny days: 16 days
  • Average rainfall: 29mm (1") over 12 days
16 days
of pure sunshine
12 days
of showers or rain

What to pack: If you’re heading to Siena in April, make sure you pack a warm jacket or coat.


Siena in May

  • Average temperature: 15℃ (59℉)
  • Average high temperature: 20℃ (69℉)
  • Average low temperature: 9℃ (48℉)
  • Average humidity: 78%
  • Average sunny days: 16 days
  • Average rainfall: 39mm (2") over 14 days
16 days
of pure sunshine
14 days
of showers or rain

What to pack: If you’re heading to Siena in May, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.


Siena in June

  • Average temperature: 20℃ (67℉)
  • Average high temperature: 26℃ (78℉)
  • Average low temperature: 13℃ (55℉)
  • Average humidity: 73%
  • Average sunny days: 20 days
  • Average rainfall: 21mm (1") over 8 days
20 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Siena in June, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Siena in July

  • Average temperature: 23℃ (73℉)
  • Average high temperature: 29℃ (85℉)
  • Average low temperature: 15℃ (60℉)
  • Average humidity: 66%
  • Average sunny days: 23 days
  • Average rainfall: 18mm (1") over 6 days
23 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to Siena in July, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Siena in August

  • Average temperature: 23℃ (74℉)
  • Average high temperature: 30℃ (87℉)
  • Average low temperature: 16℃ (61℉)
  • Average humidity: 63%
  • Average sunny days: 24 days
  • Average rainfall: 12mm (0") over 6 days
24 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to Siena in August, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Siena in September

  • Average temperature: 19℃ (65℉)
  • Average high temperature: 25℃ (76℉)
  • Average low temperature: 13℃ (56℉)
  • Average humidity: 72%
  • Average sunny days: 19 days
  • Average rainfall: 35mm (1") over 9 days
19 days
of pure sunshine
9 days
of showers or rain

What to pack: If you’re heading to Siena in September, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.

Siena in October

  • Average temperature: 14℃ (58℉)
  • Average high temperature: 20℃ (67℉)
  • Average low temperature: 10℃ (50℉)
  • Average humidity: 78%
  • Average sunny days: 19 days
  • Average rainfall: 32mm (1") over 10 days
19 days
of pure sunshine
10 days
of showers or rain

What to pack: If you’re heading to Siena in October, make sure you pack a warm jacket or coat.


Siena in November

  • Average temperature: 10℃ (49℉)
  • Average high temperature: 14℃ (57℉)
  • Average low temperature: 6℃ (43℉)
  • Average humidity: 85%
  • Average sunny days: 15 days
  • Average rainfall: 50mm (2") over 12 days
15 days
of pure sunshine
12 days
of showers or rain

What to pack: If you’re heading to Siena in November, make sure you pack a warm jacket or coat.


Siena in December

  • Average temperature: 6℃ (43℉)
  • Average high temperature: 10℃ (49℉)
  • Average low temperature: 3℃ (37℉)
  • Average humidity: 82%
  • Average sunny days: 17 days
  • Average rainfall: 34mm (1") over 11 days
  • Average snow days: 1 days
17 days
of pure sunshine
11 days
of showers or rain

What to pack: If you’re heading to Siena in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Top FAQs

The hottest month of the year in Siena is usually August, where temperatures tend to rise to around 30℃ (87℉) in the middle of the day or early afternoon.
The month with the least amount of rain in Siena is generally around August. The dry season often coincides with cooler weather, so you should check the temperatures in August first to make sure it’s still a good time to go.
The rainiest time of year in Siena is generally around November, although the wetter season can sometimes extend a few months either side of November too.
If you want to get the most out of your time visiting Siena, or if you're just afraid of the dark, the days in July are usually the longest between sunrise and sunset.

Siena map

Icons made by Freepik from www.flaticon.com