The first full weekend of summer will start on a warm and sunny note, with most spots across the Twin Tiers seeing highs in the upper-80s to low-90s, with bright sunshine throughout the day. If you have plans outside Saturday, make sure you protect yourself as the UV index will be nearing a 9, meaning the risk of burns will occur in 20 minutes or less. Grab that sunscreen and hat as you enjoy the hot and sunny day.