Running outfit

Ran a 10K on Saturday.  Tempature was 70F (21C), Sunny.

I wore a long sleeves running tops and a pair of crop pants (few inches above the ankles. approximately 5/6).  The morning was a bit chilly so I went out with long sleeves tops and just wore the same thing for running later...horrible idea.

I actually have a gauge at the distance it takes for me to feel 'warmed up', at the same pace, under different weather. It takes about 1 mile to fight off the cold when the temperature is around 30F;  then it takes 0.25 miles less as the temperature rises by 10F.  So on a 70F sunny day, it took almost no time to 'warm up'. Actually 68-70F is around room temperature, so as soon as I started running, I felt warm or even hot quickly. The most comfortable outfit would have been something lightweight and mesh-y to keep the body cool. As a leisure runner, I spent about 1 hour to run the 10K.  With the wrong outfit it was quite a long time to be uncomfortable.

So I will stick with the following outfit rules from now on:
F(C)
30s (0-5C) - long sleeve tops & running jacket, long pants, hat, running gloves
40s (5-10C) - long sleeve tops, long pants, earband
50s (10-15C) Cloudy/Windy: long sleeve tops, long/cropped pants; Sunny: short sleeve tops, long/cropped pants
60s (16-20C)+ - short sleeve/sleeveless tops, cropped pants/shorts

I find that the best weather for running is around 40s-50s. 60s is not bad too when it's not too sunny.  I really enjoy the cool breeze (but not strong wind) when running on a trail by the water - it really helps cooling down quicker and motivates me to make more strides and go faster. 30s could work as well but it is usually accompanied by some strong and chilling wind that makes my skin feel dry and irritating.  I used to complain that Chicago maintained at high 30s to 50s for a long time in the year.  It was a bit chilly to be out and about, but for runners it was a paradise.  Now I feel like that my time there was ephemeral!