I got my red dress on tonight
Dancing in the dark in the pale moonlight
Simply put, Lana loves wearing red dress, which are generally worn at parties.
She finds it ironic that it’s a beautiful summery day, and she is all dressed up to party, yet she just cannot get all of her memories of her lover out of her head.
This is extremely similar to Body Electric:
To help improve the meaning of these lyrics, visit “Summertime Sadness” by Lana Del Rey Lyrics and leave a comment on the lyrics box