Weather in Siena for May 2027
In general, the average temperature in Siena at the beginning of May is 18.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25.4 °C by the end of May.
Siena experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 109.7 mm.
Is May a good time to visit Siena? check out the best time to travel to Siena page.
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Siena Weather May
Temperatures trend during May in Siena
May weather in Siena day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Sunny | 20° /8° | 5.5 mm | 6 | |
| 2 May | Sunny | 20° /8° | 1.3 mm | 6 | |
| 3 May |  Light rain shower | 20° /8° | 2.5 mm | 6 | |
| 4 May | Patchy rain possible | 19° /7° | 0.4 mm | 5 | |
| 5 May | Patchy rain possible | 18° /10° | 12.4 mm | 3 | |
| 6 May |  Partly cloudy | 18° /9° | 10.8 mm | 4 | |
| 7 May |  Moderate or heavy rain with thunder | 17° /10° | 7.2 mm | 4 | |
| 8 May | Patchy rain possible | 19° /8° | 3.5 mm | 5 | |
| 9 May | Partly cloudy | 21° /9° | 1 mm | 6 | |
| 10 May | Sunny | 20° /9° | 6.7 mm | 4 | |
| 11 May | Sunny | 22° /10° | 2.6 mm | 5 | |
| 12 May | Partly cloudy | 21° /9° | 1.6 mm | 7 | |
| 13 May | Patchy rain possible | 20° /9° | 1.2 mm | 6 | |
| 14 May | Patchy rain possible | 22° /8° | 0.7 mm | 7 | |
| 15 May | Light rain shower | 20° /10° | 6.9 mm | 4 | |
| 16 May | Light rain shower | 18° /8° | 8.3 mm | 4 | |
| 17 May | Patchy rain possible | 20° /6° | 0.3 mm | 6 | |
| 18 May | Sunny | 21° /7° | 0.8 mm | 7 | |
| 19 May |  Patchy light rain with thunder | 21° /9° | 2.3 mm | 6 | |
| 20 May |  Moderate or heavy rain shower | 23° /11° | 7.3 mm | 6 | |
| 21 May | Light rain shower | 20° /11° | 9 mm | 5 | |
| 22 May | Patchy light rain with thunder | 22° /11° | 6.6 mm | 7 | |
| 23 May |  Patchy light drizzle | 22° /10° | 1.4 mm | 6 | |
| 24 May | Patchy rain possible | 23° /9° | 0.1 mm | 6 | |
| 25 May | Patchy light drizzle | 24° /10° | 1 mm | 7 | |
| 26 May |  Overcast | 25° /11° | 0.1 mm | 7 | |
| 27 May | Patchy rain possible | 25° /13° | 1.3 mm | 7 | |
| 28 May | Light rain shower | 26° /12° | 0.7 mm | 7 | |
| 29 May | Light rain shower | 26° /13° | 4.6 mm | 7 | |
| 30 May | Sunny | 26° /12° | 0.6 mm | 7 | |
| 31 May | Sunny | 26° /12° | 0.8 mm | 7 | |
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Siena weather in May vs April vs June
| April | May | June | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Sunny |
| Temperatures | 18°/7° | 21°/10° | 30°/15° |
| Rainfall | 59 mm | 110 mm | 31 mm |
| Wind | 14.8 km/h | 14.8 km/h | 16.7 km/h |
| Humidity | 72% | 74% | 60% |
| Rainy days | 17 days | 22 days | 8 days |
| Dry days | 13 days | 9 days | 22 days |
Planning a trip to Siena? Discover the best time to visit
Siena in May - FAQ
What are the expected maximum and minimum temperatures in Siena during May?
How much rainfall should be expected in Siena during May?
What are the typical wind conditions in Siena during May?
May rainfall patterns in Siena
UV exposure in Siena during May
What to pack to Siena in May?
Mild & changeable · highs around 21 °C, frequent showers
As you prepare for your trip to Siena in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Siena, during May, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
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Where is Siena?Get accurate weather forecasts for Siena, located at latitude 43.318 and longitude 11.331. Stay updated with localized weather information tailored for Siena.