With all of these warm days in the forecast doctors are reminding you to protect your skin from harmful rays.

We caught up with a dermatologist with Rochester Regional Health to get the low down on some of the most important factors that come into play for sun protection.

She recommends a broad spectrum sunscreen with an SPF 30 or higher is best. She says it protects against both types of UV rays.

When it comes to buying spray sunblock, it needs to be rubbed into the skin or else it won't give you an even defense against the sun's rays.

And once just isn't enough if you're spending a full day outside.

“When you’re outside on a day like today, the ingredients that protect you against the sunrays, they actually get denatured after about two hours, they’re not functioning anymore, so you have to make sure you’re reapplying every two hours,” said Dr. Nana Duffy.

Duffy says studies show people who use sunscreen regularly, even just SPF 15, lowers risk of melanoma by 50 percent.