Wilson has had to overcome adversity in order to reach the England squad.
The 26-year-old has fought his way back after suffering serious injuries to both knees since joining the club in 2014.
Howe told 'Sky Sports': "Delighted for him and his family. A very proud moment for them.
"Fully deserved, and delighted that he has the payback for the mental fortitude he showed during the adversity of the injuries that he faced.
"I have said many times before that you never saw him down and it goes to show what you can prove with that mindset.
"He has come back this season looking very confident, in good physical condition, and he has performed really well.
"His all round game has definitely improved, you can see the assists that he has had, and I think that has contributed to his call up."
Howe stressed that, despite the injury issues, Wilson has remained upbeat around the training ground.
"He faced those moments with courage and positivity," the Bournemouth boss added. "Never did I see him down and wallowing in self pity.
"It's fitting reward and his form this season is not a surprise, when you have that kind of mindset.
"For me there was no doubt Callum was going to come back in good shape and I don't think he doubted it either," Howe added.