I don't think so! 14 degree Celsius is cool and fresh; but not cold. A long sleeved shirt with a light jacket should be fine. Any temp under 10 d. is cold; especially if you will be outside a lot of the time.
900 degrees celsius
The inner core of the Earth, located at the center, has temperatures around 5,700 Celsius. The outer core is about 4,000 to 6,000 Celsius, while the mantle beneath the crust ranges from 500 to 900 Celsius.
The layer of the atmosphere that has a temperature drop of 6.5 degrees Celsius per kilometer is the troposphere. This temperature change is known as the environmental lapse rate and is a key characteristic of the troposphere, the layer closest to the Earth's surface where weather occurs.
-4
There are four layers that make up the Earth. The innermost layer is known as the inner core, and is known to consist of a molten iron-nickel alloy with a temperature of around 5400 degrees Celsius. The second layer is known as the outer core, which consists of iron and nickel and holds a temperature of around 4400 degrees Celsius. The third layer is known as the mantle, which is the largest layer of them all and constitutes around 84% of the Earths total volume. The mantle is largely solid rock. The fourth and final layer is known as the crust, and is the outermost layer of the earth. This is the layer we live on.