Siena in May
7.7out of 10
Yes, a good time to go
Mild: highs around 22°C. Frequent rain: about 10 rainy days.
22°CAvg high
11°CAvg low
10Rainy days (71 mm)
14:30 hDaylight
05:56Sunrise · 20:26 Sunset
Why this score
- Mild: highs around 22°C
- Frequent rain: about 10 rainy days
- Rain varies a lot between years (±4.2 days)
What to wear and pack
- Layers you can add or remove
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±4.2 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 May?
Daytime highs average 22°C and nights about 11°C.
When is the best time to visit Siena?
The best months are July, June, August.