My PCS fluctuates greatly, as of now I was not able to figure out if there are any variables in my environment (other than the obvious, like sleep and stress) that cause the waves of good and bad days.

I am starting to observe that I have greater symptoms, dizziness and fatigue, on overcast days. Oddly, on rainy days I seem to do better than average...
If there is really a pattern it would help me a little to plan my activities on 'bad' weather days.

It would be good to hear if any of you have similar experiences.

Thanks