June 21, 2010 6:44 am EarthWatch Forecast: June 21, 2010 There will be plenty on sunshine on this first day of summer. While the humidity has gone down, the temperatures will go as high as 91 degrees today. US & World Videos 2:44 Gray, warmer Monday 2:24 Gray Monday 2:00 Dreary Monday weather 2:36 Gloomy weather sticks around for Sunday's Broad Street Run 2:44 Cloudy, chance for rain this weekend