had a bit of rain of late, and cool nights, probably getting down to around 20 degrees.
I do know what you mean about cream blue skies though,
we get the occasional contrail that lasts less than a minute, also we get the ones that last an hour or so, but nothing mysterious about that.
they did the same when I was a kid some 30 odd years back.

30 something years, I forgot I was getting old