In a bowl, mix together the sour cream, lemon juice, granulated sugar, dried dill, and salt. Stir well, then set aside.

Peel the cucumbers if desired, then slice them thickly. Thinly slice the red onion.

In a large bowl, combine the cucumber, red onion, and creamy dressing. Stir until everything is coated.

Allow the salad to sit for 5-10 minutes at room temperature before serving.