Substack diary no.164: Tuesday, 26th. May 2026
The heatwave continues, with temperatures up to about 27-28 degrees celsius in south Devon today. At the moment I have temperature parity at home: it is 22 degrees outside and 22 degrees in the sitting room. Relative humidity is high – about 67 per cent outdoors and 60 per cent indoors.
My personal comfort zone is about 18 to 22 degrees, so today is rather too hot and humid. I am doing my best to keep indoor temperatures down; windows open on the shaded side of the house, blinds fully or partially closed depending on the availability of shade – and so on. However, my home is largely uninsulated so internal temperatures are higher than they should be; people often seem to forget that heat loss works both ways, and insulation helps to keep buildings cooler on hot days as well as warmer on cold days.
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Colin Anderson 