Siena
August
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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22
Dry days
9
Rainy days
0
Snow days
35°/19°
Temperatures
18 km/h
Avg max wind
55 %
Avg humidity
Siena in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  37° | 2 36° | 3  36° | ||||
| 4  35° | 5  36° | 6 36° | 7  36° | 8  36° | 9 37° | 10 39° |
| 11 39° | 12 39° | 13 38° | 14 37° | 15 36° | 16 34° | 17  35° |
| 18  27° | 19 30° | 20 27° | 21 33° | 22 34° | 23 35° | 24 35° |
| 25 34° | 26 35° | 27  35° | 28 32° | 29 34° | 30 35° | 31 35° |
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Temperatures trend during August in Siena
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Sunny | 37° /19° | 0.3 mm | 9 | |
| 2 Aug. | Sunny | 36° /18° | 0 mm | 9 | |
| 3 Aug. | Patchy light rain with thunder | 36° /19° | 1.7 mm | 8 | |
| 4 Aug. | Patchy rain possible | 35° /18° | 0.1 mm | 8 | |
| 5 Aug. | Cloudy | 36° /20° | 0 mm | 8 | |
| 6 Aug. | Patchy rain possible | 36° /19° | 0 mm | 8 | |
| 7 Aug. | Thundery outbreaks possible | 36° /19° | 0.1 mm | 8 | |
| 8 Aug. | Partly cloudy | 36° /18° | 0 mm | 9 | |
| 9 Aug. | Partly cloudy | 37° /19° | 0 mm | 9 | |
| 10 Aug. | Sunny | 39° /21° | 0 mm | 9 | |
| 11 Aug. | Sunny | 39° /21° | 0 mm | 9 | |
| 12 Aug. | Partly cloudy | 39° /21° | 0 mm | 9 | |
| 13 Aug. | Patchy rain possible | 38° /21° | 0.1 mm | 8 | |
| 14 Aug. | Sunny | 37° /18° | 0 mm | 9 | |
| 15 Aug. | Sunny | 36° /19° | 0.9 mm | 9 | |
| 16 Aug. | Partly cloudy | 34° /20° | 0.1 mm | 8 | |
| 17 Aug. | Patchy light drizzle | 35° /19° | 2.2 mm | 8 | |
| 18 Aug. | Moderate rain at times | 27° /18° | 7 mm | 6 | |
| 19 Aug. | Thundery outbreaks possible | 30° /16° | 3.7 mm | 7 | |
| 20 Aug. | Patchy light drizzle | 27° /16° | 1 mm | 6 | |
| 21 Aug. | Partly cloudy | 33° /18° | 0 mm | 8 | |
| 22 Aug. | Partly cloudy | 34° /18° | 0 mm | 8 | |
| 23 Aug. | Partly cloudy | 35° /19° | 0 mm | 9 | |
| 24 Aug. | Sunny | 35° /18° | 0 mm | 9 | |
| 25 Aug. | Sunny | 34° /16° | 0 mm | 8 | |
| 26 Aug. | Sunny | 35° /18° | 0 mm | 9 | |
| 27 Aug. | Heavy rain at times | 35° /17° | 29.5 mm | 8 | |
| 28 Aug. | Patchy rain possible | 32° /17° | 1 mm | 7 | |
| 29 Aug. | Sunny | 34° /18° | 0 mm | 8 | |
| 30 Aug. | Partly cloudy | 35° /19° | 0 mm | 9 | |
| 31 Aug. | 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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