Some torrential (tropical) downpours - incredible heavy rain lasting 30 minutes... then back to sunny and hot!
I think I remember 1 overcast, dreary day of 22°C and occasional showers.
EDIT: The Amazonian region is a different matter - 38%, 100% humidity - absolutely stiffling - like walking into a wall of heat that sucks your breath out of you when you come out of an air-conditioned bar.
2 hrs from Caracas too, down at sea level (though inland), it's 35°C and very humid - not nice with 33°C at night and no fan.