8 miles a little faster than expected

I did a std out, one lap around lake A, and back for 8.3 miles. It took 1:30:21/137, 10:54. Strange to consider that "faster than expected," but I'm desperate. I stayed closer to 145 bpm and ticked over some. I thought maybe it was a little cooler but 76F/69F dew point at 7-8:30am seems pretty soupy. There was a breeze though.