Do I have low density 6 months after FUE? (Photo)

It may take six to twelve months after a hair transplant surgery to see the full result.  If you are concerned it is best to contact your doctor.

First, you really can't evaluate the results of a hair transplant until its been 1 year post-op. Even though you're having good growth in other areas, its possible the hairs on temples are growing at a different rate. Second, without seeing before and after pictures as well as knowing how many grafts were transplanted and in what area, we can't evaluate your results. Density and growth post-op is relative to what the hair looked like prior. Regarding what to expect from hair transplant surgery, that really depends on the plan of action you came up with with your doctor. If you planned to have 3,000 grafts extracted and placed in temples and hair line, and you weren't completely bald in those areas prior, then we would expect to see a nice, full temple and hairline region. Now, if the surgery was compromised in some way, and the grafts in the temples didn't survive, this could result in a poor outcome. Unfortunately, you won't be able to determine this until around the 1 year mark when all hairs should be grown in. 

If the area of the FUE is not as thick as you would like, more transplantation will be necessary.
If the area of FUE has hair that is fine and too short (micronized hair) then nutritional supplements with Biotin and a series of PRP injections could do the trick.
Platelet rich plasma pulls growth factors to region of the prior hair transplantation that can enhance the growth of the hair in that region.