In reply to BnB:
Typically the first mountain rock routes that are worth climbind during spring are located on low mountains that face South also the islands can be a good choice. These are generally best at this time of year during warm mild spells. Typical choices are Garbh Bheinn South wall. Circ Mhor South face, The Cobbler & Binnein Shuas.
If there is likely to be seepage Then granite can be a good option as the friction is often pretty good still, whilst smoother rocks like schist tend to be much less enjoyable.
If it's actually raining I'd head for low scrambles or go walking myself.
Of course winter conditions aren't over yet either. Things are looking up for the weekend after this.