For me the change can be within hours of a weather shift.
Here in the midwest of the States weather can change dramatically as weather patterns soar across the prairies with nothing in their way. In half a day we can go from warm and humid to dry and cold, or vice versa.
Sometimes my skin will notice the change while I'm at work, with no windows. The change can be immediate.
Sarah & Son
EHK & ARCI
"Today is the Tomorrow that you worried about Yesterday, and all is well"