National Weather Service United States Department of Commerce

Heat and humidity build through the week, along with the chance for showers and thunderstorms. Best potential for rain will be later Monday into Tuesday, then again on Thursday. Heat indices will rise well into the 90s mid week.
Today will feature mostly sunny skies and warm temperatures in the 70s and 80s as high pressure sticks around. However, even though the risk for dangerous waves or currents is low, lake temperatures are still cold—hovering in the 50s—which means swimmers face a real risk of hypothermia.
Heat and humidity will steadily build throughout the week, peaking mid to late week. Although scattered showers and thunderstorms could slightly alter the exact high temperatures, the heat will still pose a significant risk—especially to sensitive groups and those without adequate hydration.