Marinate the chicken by combining lime juice, cilantro, olive oil, garlic powder, onion powder, cumin, salt, and black pepper in a bowl. Add chicken and coat well. Cover and refrigerate for at least 30 minutes.
Rinse jasmine rice under cold water. In a saucepan, bring 2 cups of water to a boil, add rice, reduce heat, cover, and simmer for 15 minutes. Let it rest covered for 5 minutes.
Preheat grill to medium-high heat. Discard marinade and grill chicken for 6-7 minutes on each side until internal temperature reaches 165°F. Let it rest for 5 minutes.
Slice avocado and prepare for serving.
Assemble the dish by placing rice on a plate, topping with sliced chicken and avocado. Squeeze lime juice over and serve with lime wedges.