This happened near Mill Avenue and 5th Street on May 17th between 2:30 a.m. and 3:00 a.m.
Officials say the suspect approached the woman from behind, tackled her to the ground and assaulted her.
The suspect is described as a Hispanic male in his early 20s, clean shaven, 5' 6" to 5' 8" tall with brown hair and brown eyes. He was wearing a black v-neck t-shirt, dark colored jeans and a black baseball cap with a white logo.
If you have any information about this case call Tempe Police at (480-350-8311) or Silent Witness (480- W-I-T-N-E-S-S), where you can remain anonymous and receive a cash award for tips leading to an arrest or indictment.