RcO58, I'm not sure of catch my pain can give you the answer, I can only tell you that I can definitely relate weather changes, season changes, barometric pressure change, humidity, snow, cold, rain and heavy fog to my intense pain.
If you download a weather app, it should tell you the temperature, humidity, pressure, etc. And then from there, you can take note of what circumstances affect your pain. I don't think Catch My Pain has this function, though I think that other pain tracker apps may. I have started doing this myself and there seems to be a pattern - the higher the humidity and pressure, seems to equate to higher pain.
You can always add weather related info in your comments/notes section in your daily pain entry. Not exactly what you wanted but it works. I put all kind of extra info there it helps me track any trends good and bad. I track diet changes, weather changes, any new supplements ect.