Ran /walked 2.1 miles under an overcast sky

We had light rain during the night and morning, so I waited until early afternoon to go out. During my run, the temperature was in the mid 60s (F). I ran/walked 2.1 miles and only saw one cyclist while I was out. I've been using a run:walk ratio of 20 seconds:40 seconds, but after about 1/4 of my run I changed the ratio to 25 seconds:40 seconds, and I did fine with that ratio. I took no breaks and felt fine at the end.