That's not too bad, it's the 40% and 80+ that they don't like. If you could keep it closer to 60% they'd be happy all the way through. It's hard to do without proper environmental controls. I can't keep my humidity up there in the winter either so I've tried to run mostly indicas and hybrids in the winter and flower the pure sativas in the summer. They look so much better in that higher humidity. In the summer I'll set the dehumidifier for 60% with lights on and 55% at lights off.