Whether a summer day is great or awful often comes down to the humidity.

Current heatwave is very moist, making it feel worse – especially at night – than all-time high of 40.3C in July 2022 ...

If you’ve been feeling strangely sluggish during the UK’s fourth heatwave of the year, you’re not imagining it. It’s not just the heat making you feel wiped out; the humidity is playing a big part, ...