The following are sources of information for terrestrial and solar viewing conditions.

 

 
 







 

Boston Clear Sky Chart (THE last word on local weather) http://cleardarksky.com/c/Bostonkey.html?1

Astroweather (for Boston) http://tinyurl.com/6e43pb

Weather Underground (Cambridge) http://www.wunderground.com/cgi-bin/findweather/getForecast?hourly=1&query=02139&

Accuweather (Cambridge) (Stargazing Forecast) http://www.accuweather.com/us/ma/cambridge/02139/outdoor-astronomy.asp

Heavens Above (ISS, satellite passes, Iridium flares, etc.) http://www.heavens-above.com/

Spaceweather (Solar flares, aurora, near-Earth asteroids, rocket trails, etc.) http://www.spaceweather.com/