i admit if it's pissing it down i get in the van
if it's just a bit shite then i go for lycra, with thin longs over usual shorts, summer undershirt and then a intermediate weight assos top. you get wet, but stay warm. i use neo overshoes a lot, and summer gloves with assos lobster shells when it's cold.
i dont wear eVent / goretex on the road too much, i sweat too much.
having said all that, tonight it'll be lyrca then gore shorts over with eVent pace jacket if it doesnt stop damn raining for the weds mtb ride!