Slice the cucumbers and red onion, and halve the cherry tomatoes.

In a large mixing bowl, combine the sliced cucumbers, red onion, cherry tomatoes, and chopped dill.

In a small bowl, whisk together the olive oil, white vinegar, sugar, salt, and black pepper until well combined.

Pour the dressing over the salad and toss gently to coat all the ingredients.

Serve immediately or chill in the refrigerator for 30 minutes before serving.