My passport expires in July 2019, I am planning to get my F1 visa on?
It all depends on how much time it all takes. Assuming you'll be starting your term in Fall 2018 and that you haven't set your visa appointment date, here is what I can say. Getting your passport renewed in India will take approximately from two weeks to a month at max. Based on this, setting your appointment for visa interview and document submission will take some guesswork on your part. You don't want to miss the appointment for visa interview because your passport renewal took longer than expected. You have the option of getting your passport renewed from US. The whole renewal process is online and the required documents can be submitted via post/mail. Obviously the expense for renewal is higher than that in India, but there will be ample time and it will be hassle free.