Siena weather
Our guide to the weather in Siena during September
Siena, Italy is a charmingly picturesque hilltop city with a wealth of cultural attractions and a mild climate, making it an ideal destination for British visitors in September. We've looked at the most up-to-date weather data for Siena, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Siena weather in September.
How warm is it in Siena during September?
The temperature reaches around 26℃ during the daytime in September, falling away to 14℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in Siena during September?
On average, there will be 4 rainy days during the month, amounting to 77.3mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. Due to the high temperature and humidity, you might expect lots of thunderstorms, however they're actually fairly infrequent at this time of year. On average, September will see just 2 days that produce a storm.
Is it windy in Siena during September?
You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in September. With warm air temperatures and high humidity, any breeze will feel warm but refreshing.
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Siena Blog posts
From the UK's most popular travel bloggers
14 very best places in Tuscany to visit
31st October 2022 by Hand Luggage Only
Hands down, Tuscany is easily one of the best places in Italy to visit – especially if you love a good mix of historic towns, rolling hills and the most delicious food and vineyards that you can’t miss. Tuscany is totally special and perfect for a road trip around the region, or even a city break! That being said, it can be tough to whittle down a firm list of all the best places in Tuscany to visit as they’re all dotted around this iconic region of Italy. ...
10 best things to do in Siena, Italy
20th January 2021 by Hand Luggage Only
Perched within Italy’s gorgeous Tuscany region, the medieval city of Siena is a totally stunning place to visit for a long weekend or part of a wider road trip through Italy’s best cities. With thousands of years of history, there are loads of the best things to do in Siena that are dotted all across this relatively small city. ...
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