Yes, lemon water can be consumed either hot or cold. However, the temperature might affect some perceived benefits.
While both hot and cold lemon water offer hydration, the optimal temperature for maximizing potential health benefits is often considered to be warm or room temperature. This is because very cold water may hinder digestion, as your body expends energy to warm it up. Warm lemon water is believed to allow the enzymatic and energetic properties of the lemon to function more effectively. Ultimately, personal preference plays a large role.