David was thinking very hard :
I have several thermometer cum weather prediction (barometer) cum
humidistats dotted around the place.

I did fancy something more accurate as the readings all seem suspiciously
low (but then they are indoors).

Just taken the most long term reliable one outside to check. It was
showing 30% humidity indoors and outside it has already dropped to 28%.

Both values are unlikely. I have a weather station logging both values
contantly. 40 to 45 is normal indoors, outdoors will be around the 70
to 95% most of the time at this time of year. It tends to dip in really
cold weather, because the cold air cannot support much humidity.


Meanwhile the Met Office local forecast is showing around 80% which seems
quite high; I would expect it to be nearly turning misty if the air was
that saturated. Probably wrong of me, though.