« Reply #2 on: September 10, 2018, 10:18:05 AM »
More important than any individual reading is the trend. The amount of humidity in the wood and the rate of change is the issue. Warmer air can hold more moisture, so that same 55% RH will be more like 50% at 75° -- also fine.

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Taylors: 424-LTD (all koa) and a 114ce that lives with friends in Alaska. Low maintenance carbon fiber guitars are my "thing" these days, but I will always keep the koa 424. Several ukulele and bass guitars too.
*Gone but not forgotten: a 2001 414ce, 410, 354-LTD twelve string, 314-N, 416-LTD baritone, T5 Classic, 615ce, 2006 GS-K, 1996 (first year) Baby