You check the little humidity monitor on your bedside table and it says 70%. Maybe it was 58% yesterday. Maybe you've been waking up to wet windows, or the room has started to smell a bit musty. Is 70% something to worry about? 💡 Key takeaway A bedroom humidity reading of 70% is higher than you'd generally want, especially if it stays there for long periods.   But one reading doesn't tell you everything. The temperature of the room, the time of day and what's happening elsewhere in your home all make a difference. Before buying a dehumidifier or leaving the windows open all day, it's worth checking a few things. Is 70% humidity too high for a bedroom? As a general guide, indoor relative humidity of around 40–60% is a sensible range to aim for. Bradford Council uses this range when describing conditions that help reduce damp and mould hazards in housing. That doesn't mean your bedroom must stay at exactly 50% every hour of the day. Humidity naturally changes....