In a bowl combine dill, sour cream, mayonnaise, lemon juice, red wine vinegar, and salt (add mroe salt to taste as needed). Stir together until well combined.
In a large bowl combine the cucumber and red onion and then pour the dressing over them. Toss until well coated.
Cover the bowl with a tight fitting lid or plastic wrap and place in the refrigerator to chill for 1 hour.