Yes
you do need a jacket based on the weather in 53100 Siena, Province of Siena, Italy 1 second ago
Why? Because it's pretty chilly.
57°F14°C & Partly Cloudy
Wind is 2 mph3 km/h from the N, gusting to 10 mph16 km/h
| April 18 | ||||
| 6am | 57°F14°C | 2 mph3 km/h NW | Mostly Cloudy | |
| 7am | 58°F14°C | 2 mph4 km/h NW | Mostly Cloudy | |
| 8am | 59°F15°C | 2 mph4 km/h NW | Cloudy | |
| 9am | 57°F14°C | 4 mph6 km/h NW | Cloudy | |
| 10am | 56°F13°C | 4 mph6 km/h N | Mostly Cloudy | |
| 11am | 52°F11°C | 6 mph9 km/h NE | Rain | |
| 12pm | 50°F10°C | 4 mph6 km/h E | Rain | |
| 1pm | 48°F9°C | 4 mph7 km/h NE | Cloudy | |
| 2pm | 47°F8°C | 6 mph9 km/h NE | Cloudy | |
| 3pm | 46°F8°C | 6 mph9 km/h NE | Cloudy | |
| 4pm | 46°F8°C | 7 mph11 km/h NE | Cloudy | |
| 5pm | 46°F8°C | 8 mph14 km/h NE | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 17 | 41°F5°C | 59°F15°C | 3 mph4 km/h from N | Rain | Rain |
| April 18 | 43°F6°C | 62°F17°C | 8 mph12 km/h from N | Mostly Clear | Mostly Clear |
| April 19 | 39°F4°C | 58°F15°C | 5 mph9 km/h from NE | Rain | Partly Cloudy |
| April 20 | 40°F4°C | 58°F14°C | 6 mph9 km/h from NE | Partly Cloudy | Partly Cloudy |
| April 21 | 39°F4°C | 59°F15°C | 7 mph12 km/h from SE | Rain | Mostly Cloudy |
| April 22 | 44°F7°C | 58°F14°C | 5 mph8 km/h from E | Mostly Cloudy | Mostly Cloudy |
| April 23 | 41°F5°C | 56°F13°C | 4 mph7 km/h from NW | Cloudy | Mostly Cloudy |
Yes
Low of 43°F6°C, High of 63°F17°CWind: 8 mph12 km/h
Precipitation: None