Malta has the same electrical supply, and plugs, as the UK:
http://www.kropla.com/electric2.htm
Typical maximum daytime temperatures for this time of year are around 16C, falling to about 9C overnight. Average rainfall for February is 61mm. (For comparison, the average February rainfall for both London and Manchester is 51mm).
http://uk.weather.com/weather/climatology/MTXX 0001
It's many years since I was in Malta but the prices then weren't that much different to those in the UK.
Most people seem either to love Malta or to hate it. I'm definitely in the former group (and now that there seem to be some cheaper flights advertised than there used to be, I'd love to go back soon).
Chris