Come, come, come. But why apprehensive?
Hurghada in January during the day is absolutely beautiful, not too hot, but warm enough to sunbathe. There can be a wind at times, but nothing like the UK. The temperature does drop at night, but being an ex pat from the frozen N.E. Scotland, a light jacket is enough.
Dress code for outside: Well for tourists just about anything goes, and I mean anything. Please bear in mind that you are in a predominantly Muslim country and show a bit of respect. T-shirts cut to the navel with skirts up to the navel is not on. Shoulders for those of us living here, are always covered.
There is plenty of nightlife in Hurghada: Papa's Beach Bar is one of the hotspots, Blackhouse Disco to name only two. Your best bet once you get here is to ask your Hotel for the free copy of the Red Sea Bulletin. It will have all the different venues in there.
If there is anything else I can help with p.m. me. Will be glad to help.