The Pontrhydygroes Commmunity Web Site doesn't seem to get updated very often, but it contains someuseful information.
We have already mentioned that the mobile phone coverage is very limited in the area, and although I have occasionally got a freak Vodafone connection up on the hills, the main coverage comes from Orange. Even so, down in the valley you will get no signal, more than likely.
This phone coverage map might give you an idea...
In addition to the weather station that I have linked to on the website, the Community site offers this Ystwyth weather station (not sure exactly where it is located) - which you might find interesting or useful.