Siena
August
Weather in Siena for August 2026
Your guide to Siena weather in August - trends and predictions
In general, the average temperature in Siena at the beginning of August is 34.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 30.9 °C by the end of August.
With an average of 5 rainy days, Siena experiences minimal rainfall in August.
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Temperatures
Rain 🌧️
More
26
Dry days
5
Rainy days
0
Snow days
36°/16°
Temperatures
18 km/h
Avg max wind
57 %
Avg humidity
Siena Weather August
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Temperatures trend during August in Siena
See the weather trend as well as the moving average line
August weather in Siena day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Sunny | 34° /16° | 0.2 mm | 8 | |
| 2 Aug. | Sunny | 33° /16° | 0.1 mm | 8 | |
| 3 Aug. |  Patchy light rain with thunder | 33° /17° | 1.2 mm | 7 | |
| 4 Aug. |  Patchy rain possible | 33° /15° | 0 mm | 8 | |
| 5 Aug. |  Cloudy | 35° /17° | 0 mm | 8 | |
| 6 Aug. | Patchy rain possible | 35° /17° | 0 mm | 8 | |
| 7 Aug. |  Thundery outbreaks possible | 36° /17° | 0.1 mm | 9 | |
| 8 Aug. |  Partly cloudy | 37° /17° | 0 mm | 9 | |
| 9 Aug. | Partly cloudy | 38° /19° | 0 mm | 9 | |
| 10 Aug. | Sunny | 39° /20° | 0 mm | 9 | |
| 11 Aug. | Sunny | 39° /20° | 0 mm | 9 | |
| 12 Aug. | Partly cloudy | 39° /20° | 0.3 mm | 9 | |
| 13 Aug. | Patchy rain possible | 38° /20° | 0.7 mm | 8 | |
| 14 Aug. | Sunny | 38° /17° | 6.9 mm | 9 | |
| 15 Aug. | Sunny | 36° /17° | 0.4 mm | 9 | |
| 16 Aug. | Partly cloudy | 36° /19° | 0.5 mm | 8 | |
| 17 Aug. |  Patchy light drizzle | 35° /18° | 1.5 mm | 8 | |
| 18 Aug. |  Moderate rain at times | 31° /17° | 3.5 mm | 7 | |
| 19 Aug. | Thundery outbreaks possible | 31° /16° | 2.4 mm | 7 | |
| 20 Aug. | Patchy light drizzle | 29° /17° | 5.7 mm | 7 | |
| 21 Aug. | Partly cloudy | 30° /17° | 8.6 mm | 7 | |
| 22 Aug. | Partly cloudy | 29° /16° | 14.4 mm | 7 | |
| 23 Aug. | Partly cloudy | 32° /17° | 0.8 mm | 8 | |
| 24 Aug. | Sunny | 31° /17° | 0.8 mm | 8 | |
| 25 Aug. | Sunny | 31° /15° | 0.1 mm | 7 | |
| 26 Aug. | Sunny | 31° /17° | 0.5 mm | 8 | |
| 27 Aug. |  Heavy rain at times | 33° /17° | 14.7 mm | 8 | |
| 28 Aug. | Patchy rain possible | 31° /17° | 3.3 mm | 7 | |
| 29 Aug. | Sunny | 30° /16° | 2.8 mm | 7 | |
| 30 Aug. | Partly cloudy | 29° /16° | 7.3 mm | 7 | |
| 31 Aug. | Sunny | 31° /16° | 0 mm | 8 | |
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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.
Change Month
Siena weather in August vs July vs September
Compare August weather in Siena with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| July | August | September | |
|---|---|---|---|
| Weather | Sunny | Sunny | Sunny |
| Temperatures | 37°/15° | 36°/16° | 29°/12° |
| Rainfall | 20 mm | 154 mm | 251 mm |
| Wind | 21.2 km/h | 17.8 km/h | 14.8 km/h |
| Humidity | 53% | 57% | 67% |
| Rainy days | 1 days | 5 days | 6 days |
| Dry days | 30 days | 26 days | 24 days |
Planning a trip to Siena? Discover the best time to visit
Siena in August - FAQ
What are the expected maximum and minimum temperatures in Siena during August?
Expect warm days with temperatures around 36°, cooling to mild conditions of 16° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Siena during August?
Significant rainfall exceeding 153.5 mm is expected in Siena during August, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
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
August rainfall patterns in Siena
Explore the daily rainfall trends and prepare for Sienas August weather 💧
UV exposure in Siena during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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