do you even get summer or harsh sun in the UK? 
So much easier to only put sunscreen on face and neck. I wear long sleeve summer jersey in 100F / 38C dry heat and its not a problem.
Right now the sun is already getting intense and UV is the concern:
Northern California.
WHO recommendations:
Yes! BIg fan of LS jerseys. And I go so far as to wear LS lightweight SPF jerseys (favorites are from Boure) in conditions as I like them better than slathering on sunscreen. (Necessary too as my dermatologist has already cut out more than a few abnormal sections of skin ā fortunately none malignant.)
I seem to have developed an allergy over the last couple of years to certain sunscreens. I can use the spray mineral lotion or mineral lotion in a bottle, but if its not mineral based, I will itch for days.
Mineral sunscreen is like glue, getting that shit off post ride is brutal, might as well plan on it being on for a day or two, and it leaves me looking pasty white/half dead zombie.
Got a summer long sleeve jersey from Pactimo that I tried at a gravel race this last weekend that was fine, also picked up some sun sleeves to try this year. Trying to minimize the sunscreen on my arms. which seems to be the most sensitive.
Itās pretty rare. Almost as rare as me going for a long rideā¦ 
Though itās becoming more common and will become more common.
People forget how far north the UK is, the northern border of California is at only 42 degrees latitude, the southernmost point in the UK is at just under 50 degrees which is further north than Vancouver! Iām at 56.8 North in Scotland, We might get a UV index of 7 around midday on a uncloudy day 
around the summer solstice
Me cycling outdoors? I hope so.
Actually climate change is more likely to shift us back into Dickensian weather, with a frozen Thames in winter and everyone being paid in candlesticks they can huddle around for warmth. Mini ice age.
Soā¦fat bikes I guess 
Well itās already shifted us into these floods over winter with the wettest February on record etc and rainfall 3 times the historic average of last 20 years.
Getting mineral sunscreen off my hairy legs is a PITA 
. I havenāt found good summer leg screens, though. I use ones from Bontrager and they slip down my thighs.
Has anyone tried Ornot long sleeve jerseys for the summer? Thatās next on my list. I usually use MAAP evade pro or Rapha pro team training long sleeve jerseys.
Yes, I have all three or those. The Ornot (not the merino jersey) is nice but a little thicker than the MAAP or Rapha. By the time itās hot enough to notice the difference, it doesnāt matter. Itās just hot at that point.
The MAAP jersey has an odd fabric, almost plastic feeling, but I like it a lot. The Rapha Pro is nice and feels more airy than the others but again, itās not that big of a difference.
I just got the Ornot Lightweight Long Sleeve Park and really like it. Mineral sunscreen becomes a mess on my arms when I sweat so Iām switching to long sleeve in warmer weather. Itās early in the season so I havenāt ridden it in temps over 75. I overheat easily so if itās going to go above 85 I donāt go out and ride inside with the fan on high.
Embrace the heat - if itās dry heat!
I ride in the San Gabriel Mtns. In Southern CA. Itās certainly a dry heat!
embrace it then! just rode easy in 95F heat of Sacramentoā¦ and next week looks like this:
and Iām riding every afternoon.
just getting faster and raising vo2max without any real effort.
I grew up in the Central Valley. Still never got used to the heat! Part of why I like cyclocross, it happens in the cooler months.
Iām part polar bear, from the midwest. Trust me, riding in the heat is worth it. Just ride easy and the gains will come.
Iād like me some dry heat to justify buying a light colored long sleeve jersey. Has this study been shared already:
Seems quite obvious but somehow I donāt have any light colored jerseys and I overheat easily. Does someone ride Merino jerseys in summer?
Iād like to see a study on how different colors affect core body temp, not surface temp.
I think if surface temp rises, core temp will rise too. But thatās just an assumption.
Itās literally how we cook things.
