And I don't understand why I sleep all day

Reasons for finding the lack of rain in umpty-odd Bond films interesting:

1. The political sedition of the films during the cold war. (Bond is thought to be a paragon of "Western" virtues, but almost always operates in conjunction (so to speak) with representatives of Eastern bloc countries to thwart rampant super-rich capitalists. Bond's behavior as a conspicuous consumer is also suspect - note that he prefers vodka martinis - In the 40's and 50's, drinking vodka was frowned upon as it was supposedly evidence that one was a Communist sympathizer.) So I find the potential symbolism intriguing.
2. This also points to the deals that the film producers made with tourist bureaus for location filming. You can't show off your exotic vacation destination in the rain.
   
3. It also points to the self-imposed limitations of the formula. Since the silent era, rain has been a powerful dramatic image. The idea that it takes twenty-one films for them to consider using it indicates that they are not really thinking outside the box.
   
4. I wonder if it is correct - I halfway recall rain in From Russia With Love and You Only Live Twice. I still don't have the inclination to check to see if it is correct. But I probably will now. (Strangely, I have for years never been able to watch a Bond film straight through without falling asleep. I blame this on a marathon weekend that my friends and I had in High School where we watched all (and I mean all - I had a copy of the Barry Nelson "Jimmy Bond" American fifties television version and the psychedelic train wreck Woody Allen version of Casino Royale) of them in order before going out to see the latest release in theaters. It's been at least a decade since I've tried.)
   
5. It amuses me.