I agree with staying warm. Or warm enough. Not dry.
Just did a ride in France with cool temps, 50s, at night and cool temps in the day, 60s. Plenty of rain off and on. Clothes were wet the entire ride. Used a short sleeve jersey and long sleeve jersy under a wind breaker jacket (like Pearl Izumi Zephyr) the first night. And leg warmers. I was cooler than I prefer but not dangerously cold. Then I used the Showers Pass Event rain jacket from then on during the day and night. Short sleeve and long sleeve jerseys and leg warmers stayed on. Heavier rain jacket added more warmth than the wind breaker jacket. Tended to get hotter in the heavy rain jacket when the weather was sort of nice for a few miles. But being a little hot is better than being a lot cold.
In June I came down Loveland Pass in Colorado in the rain, snow, wind, 30s-40s temps. After getting soaked the last few miles to the top in the rain and snow. And stopping at the top to put on arm and leg warmers and balaclava and gloves. Used short sleeve jersey, wind breaker jacket, balaclava, arm and leg warmers, long fingered liner gloves. Just warm enough with these clothes going down the 8-9 miles in the rain, wind, snow to make it. Soaking wet of course. But barely warm enough for pretty extreme conditions. A friend used his Showers Pass Event heavy rain jacket, heavy gloves, tights, etc. and was more than OK on the same descent.