Not a flake of snow today even though it was forecast to fall this morning
Clear and sunny today. Official sunset time for my area is now 4:15 but because I live in a hilly area sunset is always quite a bit earlier - today the sun disappeared behind the horizon at around 4pm.
I'm wondering how this affects the process of it going dark (twilight)?
I've been looking at the twilight times of my area here:
http://www.timeanddate.com/astronomy/uk/blackburn
So, I have a few questions.
1. Do hilly places have less daylight, or just less sunshine?
2. In hilly areas, does Civil Twilight begin at the official sunset time for that area (as posted on weather websites) or when the sun actually dips below the horizon?
3. In hilly areas, does twilight finish sooner as the sun went behind the horizon sooner?
3. Does twilight last longer or shorter in hilly areas?