The morning appears to be the best time with the lowest threat of rain for the whole day, but there is still a chance for isolated to scattered showers through the morning. (sbnation.com)
The weather is clear and crisp and relatively warm, without any real threat of rain. (earthtrekkers.com)
It seems from one run of the models to the next we keep getting a different scenario and timing but generally I go back to my original forecast that there is a good threat of rain during the race. (sbnation.com)