I've started going on 1 mile runs every day in addition to kendo once a week because the doctor says that my heart is too weak and my blood pressure is too low. I've been running in the evenings when it gets a bit cooler outside, but I wonder if it's healthier to run in the mornings?
I once got some advice from someone Training for Iron man (so i can say this info is pretty reliable). When it comes to training, you either want to do it incredibly late at night (after 10) or very early in the morning (after 4 AM). So depending on the time and actually what you eat it can be healthier (in terms of weight loss) to run at different times of the day.