No
you don't need a jacket based on the weather in 53100 Siena, Province of Siena, Italy 1 second ago
66°F19°C & Clear
Wind is 2 mph3 km/h from the Northwest, gusting to 6 mph9 km/h
| September 15 | ||||
| 7pm | 65°F18°C | 2 mph3 km/h Northwest | Mostly Clear | |
| 8pm | 64°F18°C | 1 mph1 km/h West | Mostly Clear | |
| 9pm | 63°F17°C | 1 mph2 km/h Southwest | Mostly Clear | |
| 10pm | 63°F17°C | 1 mph2 km/h West | Mostly Clear | |
| 11pm | 62°F17°C | 2 mph2 km/h Southwest | Mostly Clear | |
| September 16 | ||||
| 12am | 62°F17°C | 2 mph3 km/h Southeast | Partly Cloudy | |
| 1am | 62°F17°C | 2 mph3 km/h Southeast | Mostly Cloudy | |
| 2am | 64°F18°C | 2 mph3 km/h South | Haze | |
| 3am | 66°F19°C | 2 mph3 km/h South | Mostly Cloudy | |
| 4am | 70°F21°C | 3 mph5 km/h South | Partly Cloudy | |
| 5am | 73°F23°C | 4 mph7 km/h Southwest | Partly Cloudy | |
| 6am | 76°F24°C | 6 mph9 km/h West | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 62°F17°C | 80°F27°C | 6 mph10 km/h from West | Partly Cloudy | Mostly Cloudy |
| September 16 | 56°F14°C | 80°F26°C | 3 mph5 km/h from North | Mostly Cloudy | Clear |
| September 17 | 58°F14°C | 83°F28°C | 3 mph5 km/h from East | Clear | Mostly Clear |
| September 18 | 60°F15°C | 86°F30°C | 2 mph3 km/h from Northeast | Partly Cloudy | Partly Cloudy |
| September 19 | 62°F17°C | 86°F30°C | 2 mph3 km/h from East | Mostly Clear | Clear |
| September 20 | 62°F17°C | 83°F29°C | 3 mph5 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 21 | 60°F15°C | 82°F28°C | 5 mph8 km/h from South | Mostly Clear | Partly Cloudy |
Yes
Low of 56°F14°C, High of 80°F27°CWind: 3 mph5 km/h
Precipitation: None