Yes. We had a big family Christmas holiday in Malta in 2013. 14 of us went. My gooodness, it was overcrowded absolutely everywhere. And the weather was definitely not good.
It rained a lot, especially on the day we took the bus tour around the island on an open top bus. It was almost funny in a way. We all had to sit downstairs and watch the waterfall of rain pouring down the steps of the bus. And we could not get off at any of the usual scenic stopping points.
Having said that, the hotel was wonderful, and put on a fantastic Christmas Day dinner and entertainment.
We didn't stay in Valetta, but in St,Julian's where there is a little man-made beach. Luckily the hotel had a warm indoor swimming pool.
I think we were just unlucky with the weather. But even so I don't want to go back there.