No

you don't need a jacket based on the weather in Thessaloniki, Greece 1 second ago

70°F21°C & Cloudy

Wind is 9 mph14 km/h from the South, gusting to 14 mph23 km/h
May 15
11am69°F21°C9 mph15 km/h SouthCloudy
12pm68°F20°C8 mph13 km/h SouthCloudy
1pm65°F19°C7 mph11 km/h SouthCloudy
2pm63°F17°C5 mph8 km/h SouthCloudy
3pm62°F17°C4 mph6 km/h SoutheastCloudy
4pm61°F16°C3 mph4 km/h SoutheastCloudy
5pm60°F16°C3 mph5 km/h EastCloudy
6pm59°F15°C3 mph5 km/h NortheastDrizzle
7pm58°F14°C3 mph5 km/h NortheastDrizzle
8pm57°F14°C4 mph6 km/h EastDrizzle
9pm56°F14°C4 mph7 km/h EastDrizzle
10pm56°F13°C4 mph7 km/h EastRain
DateLowHighWindDayNight
May 1452°F11°C71°F22°C5 mph8 km/h from SouthPartly CloudyRain
May 1555°F13°C62°F17°C6 mph10 km/h from EastRainRain
May 1649°F9°C69°F21°C11 mph18 km/h from NorthMostly ClearMostly Clear
May 1752°F11°C73°F23°C5 mph8 km/h from NorthwestClearClear
May 1854°F12°C77°F25°C4 mph7 km/h from SouthwestClearClear
May 1956°F13°C80°F27°C8 mph13 km/h from NorthwestClearMostly Clear
May 2060°F16°C81°F27°C5 mph8 km/h from SouthwestMostly ClearPartly Cloudy

Yes

Low of 55°F13°C, High of 63°F17°C
Wind: 6 mph10 km/h
Precipitation: 87% rain

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