The obvious to-do is to wear sunscreen—every day, rain or shine—and reapply on the two-hour mark. The sun still peeks through an overcast sky, so make sure your exposed skin is properly protected.
Aside from SPF, you may also want to up your antioxidant intake. While they don’t physically block the sun’s rays (thus, why sunscreens are paramount), antioxidants can help disarm free radical damage before it happens, which can manage oxidative stress and sun-induced skin aging.* That’s why many market sunscreens include antioxidants in their formulas to provide an extra layer of protection. Applying them topically is important, no doubt, but you’ll want to ingest them, too, in order to support your body’s natural protection process.*