@ pochola430 - Ah, OK about the timing.
In fact, I think you will be hitting the "sweet spot" for timing a trip to Malta. We arrived on 9/23, stayed through 10/5 and I think our timing was good: still plenty warm (sunny, hot, and humid every day) but not (quite) overwhelming and oppressive. Mid-days it got quite hot, and the heat still demanded respect (we scheduled "shade time" and siestas mid-days). We did get a couple of stray thunderstorms at night (which were dramatic and spectacular), only a little rain at night a couple brief times, some wind a couple afternoons but not enough to disrupt anything we were doing. Overall, I though the weather during our time there was pretty much perfect and exactly what I had hoped for.
We loved Malta overall, but it's not without some shortcomings. How much those bother you (or how much you actually enjoy those things) will depend on your tastes and interests. Valletta, which to me is one of the most scenic and spectacular cities in Europe, is quite touristy, with crowds of cruise-ship day-trippers dominating much of the city during mid-day. When the cruise ships pull out at the end of the day, the place becomes lovely, magical, and like no place I've been.
There is so much history visible everywhere, it's nearly overwhelming at times. The entire city and its surroundings are essentially all one continuous series of fortifications, dating back from the time of the Crusades up through WWII. If you enjoy historic places, you won't be able to take in more than a tiny fraction of what's there.
Culturally, it's a strange yet often-familiar mix. I eventually came to think of Malta like this: "Beyond Italy, beyond Sicily, not quite North Africa, and very, very Ye Olde British Empire." Lots of it is surprisingly "run-down" (beyond run-down, in fact: things that seem to have been abandoned and left to rot 100 years ago), right next door (literally) to things that have obviously been lovingly and painstakingly preserved and are now treasured. Lots of highly visible vestiges of the British Empire, layered on top of what looks/smells/tastes/sounds like Italy and North Africa - to me, Malta seemed at times "more Italian than Italy" in (mostly) good ways. As Rick Steves correctly observed long ago: Italy gets more intense (and chaotic) as you go from north to south. If you like it, keep going beyond Rome. If you like that, keep going to Sicily. If you like that, Malta is the next rock you can reach.
Spend some time in Gozo if you can - I've heard locals lament that Gozo is the last bit of country that hasn't been over-developed and over-touristed. Gozo is certainly more relaxed, less developed and less touristy (driving is much easier, too), and has lots of outstanding natural/outdoor scenery and things to do. We had 5 days there (including 2 days scuba diving) and we loved it all.
Choose your accommodations carefully. Mass-tourism (not just the daily cruise ships, but also cheap package holidays for Europeans) are very popular, and large sections of Malta are essentially expat enclaves. If you want underage drinking, discos thumping all night, etc., there's plenty of that in the more popular areas. In fact, those places are where most accommodations are found (because they're cheap, heavily marketed, and massively available). We stayed in the so-called "Three Cities" and loved it (note: they're not actual/separate cities, there are more than 3 of them, and most of them have at least 2 different names, so they can be pretty confusing and at times logistically complicated; go figure). There are relatively few options for staying in the old parts of the city, so you may have to do some work to find the right place if you want to avoid the cookie-cutter accoms.
Happy to answer questions if you have any. Cheers.
