Siena
May
Weather in Siena for May 2025
Your guide to Siena weather in May - trends and predictions
In general, the average temperature in Siena at the beginning of May is 16.4 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 22 °C by the end of May.
Expect significant rainfall in Siena during May, with an average of 19 rainy days.
Is May a good time to visit Siena? check out the best time to travel to Siena page.
- New! Chat with our AI weatherman - it’s amazing and free.
12
Dry days
19
Rainy days
0
Snow days
21°/10°
Temperatures
14 km/h
Avg max wind
77 %
Avg humidity
Siena in May average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  18° | 2  12° | 3 14° | 4 16° | |||
| 5 19° | 6  20° | 7 16° | 8 21° | 9 20° | 10  22° | 11 23° |
| 12 23° | 13 23° | 14 23° | 15 21° | 16 21° | 17 21° | 18 24° |
| 19  22° | 20  24° | 21 19° | 22 20° | 23  21° | 24 23° | 25 20° |
| 26  22° | 27 24° | 28 22° | 29 22° | 30 22° | 31 22° |
You can click on date
Access Siena weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during May in Siena
See the weather trend as well as the moving average line
May weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Moderate or heavy rain with thunder | 18° /12° | 16.5 mm | 4 | |
| 2 May | Light rain shower | 12° /8° | 4 mm | 3 | |
| 3 May | Light rain shower | 14° /8° | 7.6 mm | 3 | |
| 4 May | Patchy rain possible | 16° /6° | 0.5 mm | 4 | |
| 5 May | Patchy rain possible | 19° /7° | 0 mm | 4 | |
| 6 May | Partly cloudy | 20° /8° | 0 mm | 6 | |
| 7 May | Moderate or heavy rain with thunder | 16° /10° | 13.3 mm | 4 | |
| 8 May | Patchy rain possible | 21° /7° | 0.1 mm | 5 | |
| 9 May | Partly cloudy | 20° /9° | 0 mm | 6 | |
| 10 May | Sunny | 22° /8° | 0 mm | 6 | |
| 11 May | Sunny | 23° /9° | 0 mm | 6 | |
| 12 May | Partly cloudy | 23° /9° | 0 mm | 6 | |
| 13 May | Patchy rain possible | 23° /11° | 0.5 mm | 5 | |
| 14 May | Patchy rain possible | 23° /10° | 0 mm | 5 | |
| 15 May | Light rain shower | 21° /13° | 2.4 mm | 5 | |
| 16 May | Light rain shower | 21° /11° | 4.6 mm | 5 | |
| 17 May | Patchy rain possible | 21° /10° | 0.8 mm | 5 | |
| 18 May | Sunny | 24° /9° | 0 mm | 6 | |
| 19 May | Patchy light rain with thunder | 22° /12° | 4.6 mm | 5 | |
| 20 May | Moderate or heavy rain shower | 24° /13° | 17.9 mm | 5 | |
| 21 May | Light rain shower | 19° /11° | 13.1 mm | 4 | |
| 22 May | Patchy light rain with thunder | 20° /10° | 4 mm | 5 | |
| 23 May | Patchy light drizzle | 21° /9° | 2.2 mm | 5 | |
| 24 May | Patchy rain possible | 23° /9° | 0.3 mm | 5 | |
| 25 May | Patchy light drizzle | 20° /10° | 3.1 mm | 5 | |
| 26 May | Overcast | 22° /10° | 0 mm | 5 | |
| 27 May | Patchy rain possible | 24° /11° | 0 mm | 5 | |
| 28 May | Light rain shower | 22° /12° | 1.6 mm | 5 | |
| 29 May | Light rain shower | 22° /12° | 3.8 mm | 5 | |
| 30 May | Light rain shower | 22° /12° | 1.7 mm | 5 | |
| 31 May | Patchy rain possible | 22° /11° | 2.5 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Siena in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Siena forecast closer to your planned date for the most up-to-date weather information.
Siena in May - FAQ
What are the expected maximum and minimum temperatures in Siena during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Siena during May?
Significant rainfall exceeding 105.2 mm is expected in Siena during May, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Siena during May?
The average wind speed in Siena during May is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Siena in May?
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
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
Quick links
You are here
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.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.