Hi Retard,
The air turbulence caused by wind around a microphone is mainly lower frequencies, but many more than only 100Hz, all the way up to 1kHz or higher. Maybe your microphone is cheap with a bad resonance at 100Hz but wind noise will certainly be picked-up by it at many other frequencies in the voice and music band. Foam or hairy windscreens are used by audio professionals and work well in light winds.
A single capacitor makes a lousy filter anyway. If it was designed to reduce 200Hz to 0.7, then 100Hz would be reduced to 0.5. If it was designed to reduce 1kHz to 0.7 so there isn't much bass, then 100Hz would be reduced to 0.1, still plenty of level to trigger a timer if a strong wind gust occurs.
You have drawn an opamp circuit that needs positive and negative voltages for its power supplies. With a single power supply voltage it will need biasing to work properly. Also, its output will need a coupling capacitor to the pull-up resistor at the trigger input of a timer.