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Weather in Siena for August 2025

Your guide to Siena weather in August - trends and predictions
  • In general, the average temperature in Siena at the beginning of August is 36 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 34.3 °C by the end of August.

  • Siena sees moderate rainfall in August, averaging 9 rainy days.

  • Is August a good time to visit Siena? check out the best time to travel to Siena page.

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Average dry days
22
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
35°/19°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
55 %
Avg humidity

Siena in August average weather

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Temperatures trend during August in Siena

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

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Date Weather Temperatures Rain UV More
1 Aug. Sunny
Sunny
37° /19° 0.3 mm 9
2 Aug. Sunny
Sunny
36° /18° 0 mm 9
3 Aug. Patchy light rain with thunder
Patchy light rain with thunder
36° /19° 1.7 mm 8
4 Aug. Patchy rain possible
Patchy rain possible
35° /18° 0.1 mm 8
5 Aug. Cloudy
Cloudy
36° /20° 0 mm 8
6 Aug. Patchy rain possible
Patchy rain possible
36° /19° 0 mm 8
7 Aug. Thundery outbreaks possible
Thundery outbreaks possible
36° /19° 0.1 mm 8
8 Aug. Partly cloudy
Partly cloudy
36° /18° 0 mm 9
9 Aug. Partly cloudy
Partly cloudy
37° /19° 0 mm 9
10 Aug. Sunny
Sunny
39° /21° 0 mm 9
11 Aug. Sunny
Sunny
39° /21° 0 mm 9
12 Aug. Partly cloudy
Partly cloudy
39° /21° 0 mm 9
13 Aug. Patchy rain possible
Patchy rain possible
38° /21° 0.1 mm 8
14 Aug. Sunny
Sunny
37° /18° 0 mm 9
15 Aug. Sunny
Sunny
36° /19° 0.9 mm 9
16 Aug. Partly cloudy
Partly cloudy
34° /20° 0.1 mm 8
17 Aug. Patchy light drizzle
Patchy light drizzle
35° /19° 2.2 mm 8
18 Aug. Moderate rain at times
Moderate rain at times
27° /18° 7 mm 6
19 Aug. Thundery outbreaks possible
Thundery outbreaks possible
30° /16° 3.7 mm 7
20 Aug. Patchy light drizzle
Patchy light drizzle
27° /16° 1 mm 6
21 Aug. Partly cloudy
Partly cloudy
33° /18° 0 mm 8
22 Aug. Partly cloudy
Partly cloudy
34° /18° 0 mm 8
23 Aug. Partly cloudy
Partly cloudy
35° /19° 0 mm 9
24 Aug. Sunny
Sunny
35° /18° 0 mm 9
25 Aug. Sunny
Sunny
34° /16° 0 mm 8
26 Aug. Sunny
Sunny
35° /18° 0 mm 9
27 Aug. Heavy rain at times
Heavy rain at times
35° /17° 29.5 mm 8
28 Aug. Patchy rain possible
Patchy rain possible
32° /17° 1 mm 7
29 Aug. Sunny
Sunny
34° /18° 0 mm 8
30 Aug. Partly cloudy
Partly cloudy
35° /19° 0 mm 9
31 Aug. Sunny
Sunny
35° /20° 0 mm 9
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Important Notice
Our weather forecast for Siena in August 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 August - FAQ

What are the expected maximum and minimum temperatures in Siena during August?
Expect warm days with temperatures around 35°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Siena during August?
In August, Siena can expect light to moderate rainfall, totaling 47.7 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Siena during August?
The average wind speed in Siena during August is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Siena in August?

As you prepare for your trip to Siena in August, 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 August, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
    • Sandals/Flip-flops: Comfortable for warm climates
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

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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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