Sun Exposure on Accutane, 4 months post op what are the effects?

I'm going into month 4 of my accutane regimen, currently on 80mg a day. Not too many side effects from the drug in general other than the usual dryness. With the weather warming up I was curious about the effects of sun exposure while on Isotretinoin. My boyfriend lives in the city and we walk everywhere when its warm. I'm mexican and usually tan but have burned on occasion but I want to make sure I won't burn like crazy in the summer months.