Hi Arvin and Ken, thanks for sharing our experience,
I live within the city but occasionally we get drastic drops in temperature like when it rains or when cold air currents start to blow across the city. The worst part of the weather is that when the clouds gather but not sufficient to produce a rainstorm, so we feel like the atmosphere has been blanketed by a thermo blanket.
After the rains, all is well, until the next day everything starts all over again... For increasing the humidity I have only one ceramic water urn that I put some fishes and water plants in, but can't afford to keep more than one container as mosquitoes do their egg laying everywhere they can.
My x Mirandas, mirabilis, gracilis, raffs and a newer clone of N x hookeriana I got two years ago, are those that still manage to put out pitchers and countless offshoots continously. Belli and bical x gracilis are also doing well. To provide higher humidity I try to clump the plants close to each other as well as slot those tillandsias into every space available.