Generally, I will play in the rain as long as it starts raining after I tee off. If it is raining before or the forecast is for a deluge of rain, then I am less likely to tee it up on that day. I feel that I play enough in the good weather not to worry about missing a day or two, now and again. I am not sure if this is good strategy for my overall game, but that is the one I have adopted this year.