I ran the 2.5 miles again today. Last Monday and also last week I'd measured the last half-mile at a 13:10 pace. Today I did it at a 12:16 pace. In all three cases, I ran a comfortable resting pace with no attempt to run fast. My faster pace today is a good sign that my body is recovering.
The temperature during my run was in the low 60s (F). The sky was overcast with a 4-5 mph breeze, and it was a nice running day.