50%RH is fine. It's when its 80% plus that it becomes an issue when warm, maybe 70% when it's cooler.

Be wary of the %RH values from the low cost weather stations as they are normally quite inaccurate on the %RH side, maybe ±10% at best. Use it as an indicator, rather than as an absolute guide. Also, it needs to be in the place you're working rather than outside. And remember that it needs to be kept out of direct sunlight or you'll get higher temperature and lower %RH readings.