Hey, I'm running my first marathon this Saturday down in Washington DC. I purchased a long sleeve Adidas Response Climacool top about a month ago since the race day average temperature is only a high of 57F and low of 38F. The race starts at 7am and I figured given that average high and low it would range from about 42-52 degrees throughout the race.
Now the forecast is calling for a low of 51 and a high of 66, anybody with experience with the Adidas Climacool long sleeve tops have any input on whether I would be fine or if I get a singlet?