This is a comminuted 5th MT base fracture, not a classical Jones fracture.
Healing should take about 6 weeks.
You can bear weight in a walking cast or airboot, that should start not before 3 weeks.
Health Tips
Screw fixation can improve the union chances in these kind of fractures which are know for delayed union/non union due to strong pull of peroneus brevis muscle, the effect being more when one walks.