Ling periods of high humidity can permanently fuck up a carbon filter, but one day shouldn't be a huge issue. You say it it's was at %90 the other day. .. what is it at normally?
If your humidity is that high you NEED a dehumidifier. Or your asking for diseases like powdery mildew or eventually bud rot. As stated above high humidity can ruin a filter. And surely prevents it from doing its job well before that happens.