How does one interpret the weather forecast temperature range?

Question

For example; Friday 7 - 15, Saturday 3 - 12

Does it mean that it will be 7 degrees on Friday morning, Friday night, Friday any time in the 24 hour period, or on Saturday morning?

Thanks for your help!

Answer 1

These are the expected lowest and highest ambient air temperatures for those days. The lowest will usually be early in the morning - around dawn, and the highest will usually be early to mid afternoon.

Ambient air temperature is ther temperature that would be recorded by the dry bulb thermometer in a standard meteorological screen mounted 1.25 metres above an open, flat, mown grass area.  

Is the teperature scale in degC or degF?