Cycling in the high mountains. Alps, Dolomites, Pyrenees etc

I rode it around this time of year last summer and it was glorious - no gilet or warmers needed and I normally run pretty cold. You'll find you get hot as you climb and as long as you don't dawdle at the top too long you'll cool down on the descent. You may want to check for wind rather than temperature as it can be pretty hairy when you exit the forested section in the wind is kicking off, when I rode it was pretty still. I would suggest the climb from Bedoin if you're not sure which of the three you fancy, unless you fancy all three in a row of course in which case, good luck.