Well? I went to a match last month that had sixty+ shooters, just a monthly club match, nothing special. Weather was sunny and about 70, just beautiful weather for April in the mid-atlantic. Yesterday I go to the same match, same club and there's only 20 shooters! Weather was rainy in the low 50's.
Is everyone wimps? I figure that unless there is lightning or a confirmed tornado, you should keep on shooting.
On the bright side the crappy weather kept away the safety hazards and the ones that are constantly finding something to whine about, everyone really wanted to shoot and the match was concluded at 2pm rather than about 6.