uk.weather.yahoo.com/Europe/United_kingdom/
Up-to-date weather in the UK.

www.met-office.gov.uk/climate/uk/location/wales/
A clear summary of patterns of weather in Wales provided by the Met Office. Lots of useful links and educational opportunities. Find your local weather station.

www.met.rdg.ac.uk/~brugge/ukclimate.html#RWales
Lots of detailed statistics on individual weather stations with the summaries for the period 1961-1990.