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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.
Average dry days
12
Dry days
Average rainy days
19
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/10°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Siena in May average weather

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Temperatures trend during May in Siena

See the weather trend as well as the moving average line
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May weather day by day

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Date Weather Temperatures Rain UV More
1 May Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
18° /12° 16.5 mm 4
2 May Light rain shower
Light rain shower
12° /8° 4 mm 3
3 May Light rain shower
Light rain shower
14° /8° 7.6 mm 3
4 May Patchy rain possible
Patchy rain possible
16° /6° 0.5 mm 4
5 May Patchy rain possible
Patchy rain possible
19° /7° 0 mm 4
6 May Partly cloudy
Partly cloudy
20° /8° 0 mm 6
7 May Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
16° /10° 13.3 mm 4
8 May Patchy rain possible
Patchy rain possible
21° /7° 0.1 mm 5
9 May Partly cloudy
Partly cloudy
20° /9° 0 mm 6
10 May Sunny
Sunny
22° /8° 0 mm 6
11 May Sunny
Sunny
23° /9° 0 mm 6
12 May Partly cloudy
Partly cloudy
23° /9° 0 mm 6
13 May Patchy rain possible
Patchy rain possible
23° /11° 0.5 mm 5
14 May Patchy rain possible
Patchy rain possible
23° /10° 0 mm 5
15 May Light rain shower
Light rain shower
21° /13° 2.4 mm 5
16 May Light rain shower
Light rain shower
21° /11° 4.6 mm 5
17 May Patchy rain possible
Patchy rain possible
21° /10° 0.8 mm 5
18 May Sunny
Sunny
24° /9° 0 mm 6
19 May Patchy light rain with thunder
Patchy light rain with thunder
22° /12° 4.6 mm 5
20 May Moderate or heavy rain shower
Moderate or heavy rain shower
24° /13° 17.9 mm 5
21 May Light rain shower
Light rain shower
19° /11° 13.1 mm 4
22 May Patchy light rain with thunder
Patchy light rain with thunder
20° /10° 4 mm 5
23 May Patchy light drizzle
Patchy light drizzle
21° /9° 2.2 mm 5
24 May Patchy rain possible
Patchy rain possible
23° /9° 0.3 mm 5
25 May Patchy light drizzle
Patchy light drizzle
20° /10° 3.1 mm 5
26 May Overcast
Overcast
22° /10° 0 mm 5
27 May Patchy rain possible
Patchy rain possible
24° /11° 0 mm 5
28 May Light rain shower
Light rain shower
22° /12° 1.6 mm 5
29 May Light rain shower
Light rain shower
22° /12° 3.8 mm 5
30 May Light rain shower
Light rain shower
22° /12° 1.7 mm 5
31 May Patchy rain possible
Patchy rain possible
22° /11° 2.5 mm 5
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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

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Location coordinates 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.

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