1. Is the globe made with tempered glass? 2. Will it withstand freezing temperature?

This glass is heat treated. It is for outside use in freezing weather.
In general, heat treated or tempered glass is four times stronger than annealed glass. Tempered glass cannot be drilled or cut without shattering. All fabrication needs to be done while the glass is in the softer, annealed condition. Annealed glass can be cut, drilled, notched and edge finished.