Start by shucking the corn and removing the kernels from the cobs. You can do this by standing the cob upright in a bowl and cutting downwards with a sharp knife.
In a large mixing bowl, combine the corn kernels, cherry tomatoes, cucumber, red onion, and cilantro.
In a separate small bowl, whisk together the lime juice, olive oil, salt, black pepper, and chili powder (if using).
Pour the dressing over the salad mixture and toss gently to combine all ingredients evenly.
Taste and adjust seasoning if necessary. If you prefer a tangier flavor, add more lime juice.
For best results, let the salad chill in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.