Lunch- no rain when we started. Then a sprinkle. Then a moderately hard rain, enough to soak the shoes in under a minute. Then it really started coming down, with puddles everywhere and streams across the roads. Not quite "red thunderstorm" hard, but only 1 step below.
8 miles or so.
Did I mention it rained?
To be honest, rainy and 75 deg is quite enjoyable. Just makes the clothes a bit heavy afterwards.