This Friday I am going to my hair salon to get my tips dyed different shades of blue but only temporarily. I am still in school so it has to come out in around 2 1/2 months at the most and I'm not sure how long temporary dye lasts. My hair is slightly lighter than dirty blonde and I want to know if the color will stay in too long before school comes around.

Tell your hairdresser your exact concern - no one here knows what product you/she intend to use.

Temporary can be 6 weeks or 6 months.