I haven't run much for quite some time so went out after work with my wife and father inlaw and after 1km I decided to run a different route just so I can open up on my pace a little(you can see that on my pace sections on strava)but the temperature when I set of was 20 degrees which was a little harsh on dehydration but slowed down for 2km then picked up the pace a little for the last 2km.
Check out my activity on Strava: https://strava.app.link/5QVqpjX54eb