Weather forecasts indicate a shift from warm and comfortable conditions to hotter and more humid weather with thunderstorms expected in various regions. Seattle and its neighboring cities offer numerous free park activities for summer entertainment. The summer solstice marks the official start of summer in the Northern Hemisphere, with Santa Barbara celebrating the longest day of the year. The early arrival of the solstice this year is due to calendar adjustments, leading to warmer weather forecasts in Southern California over the weekend.