More Forecast Details:
https://www.cleardarksky.com/csk/
https://clearoutside.com/forecast/39.33/-77.34
What to Bring for a Night of Stargazing: The Ultimate Guide
Basics:
http://www.astronomysource.com/2012/02/20/top-10-night-sky-objects-for-astronomy-beginners/
http://www.skyandtelescope.com/observing/sky-at-a-glance/
'Slightly' Advanced:
http://sguisard.astrosurf.com/
http://www.obsessiontelescopes.com/
Attila Danko's Expletive Scale of Astronomical Observation (Not Suitable for Kids):