Siena in August
8.1out of 10
Yes, a good time to go
Warm and comfortable: highs around 30°C. Some rain: about 6 rainy days.
30°CAvg high
18°CAvg low
6Rainy days (40 mm)
13:47 hDaylight
06:25Sunrise · 20:12 Sunset
Why this score
- Warm and comfortable: highs around 30°C
- Some rain: about 6 rainy days
What to wear and pack
- T-shirts and light layers
- Shorts or a light skirt
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in August varies a lot between years (±3.6 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 9°C | 2°C | 55 mm | 8 | – | – | 5.8 |
| February | 10°C | 2°C | 65 mm | 8 | – | – | 6.0 |
| March | 14°C | 4°C | 66 mm | 9 | – | – | 6.6 |
| April | 17°C | 7°C | 79 mm | 11 | – | – | 6.8 |
| May | 22°C | 11°C | 71 mm | 10 | – | – | 7.7 |
| June | 26°C | 15°C | 50 mm | 8 | – | – | 8.1 |
| July | 29°C | 17°C | 31 mm | 5 | – | – | 8.4 |
| August | 30°C | 18°C | 40 mm | 6 | – | – | 8.1 |
| September | 24°C | 14°C | 92 mm | 9 | – | – | 7.8 |
| October | 19°C | 10°C | 109 mm | 10 | – | – | 7.1 |
| November | 14°C | 6°C | 119 mm | 12 | – | – | 6.0 |
| December | 10°C | 2°C | 79 mm | 10 | – | – | 5.8 |
Frequently asked questions
How hot is Siena in August?
Daytime highs average 30°C and nights about 18°C.
When is the best time to visit Siena?
The best months are July, June, August.