The wind can completely alter a Hill Climb effort adding or subtracting minutes from the climb. This makes judging the effort and choosing a gear if riding fixed challenging.
If you plan to ride fixed and you have estimations of Power, Weight and CdA. Take a look at the Ground Speed chart on hill climbs to assist you in picking the correct gear. The average, min and max speeds will help you judge gear choice.
Here’s a quick infographic on how to set up your chart and use the basic functions of a myWindsock forecast to get the best foresight for your hill climb event.