Smart watering systems use precision irrigation to optimize water use and promote plant health by targeting water delivery to plant roots at timed intervals. This study examines the potential of smart watering to serve as an alternative to conventional cooling methods in indoor environments. The investigation was structured around comparative analyses in two controlled environments: Room A, which was outfitted with a smart watering system, and Room B, which was left in its original state without any modifications. The experimental setup included a variety of conditions, differentiating by number of plants and the frequency of watering, along with comparisons to conditions without any watering. This design was intended to rigorously test the cooling efficacy of the smart watering system under diverse and controlled conditions. The primary findings from this study suggest that the implementation of smart watering can lead to a significant reduction in indoor temperatures. In Room A, where the watering is applied, temperatures were consistently lower than those recorded in Room B, which served as the baseline control. Statistical analysis was employed to assess the impact of various experimental scenarios. It was observed that scenarios involving a higher density of foliage, such as ten plants watered every 30 min (Case 2) and fifteen plants subjected to the same watering regimen (Case 5), were particularly effective in reducing temperatures. These scenarios achieved a marked decrease in the average temperature of Room A, highlighting the efficiency of smart watering when combined with substantial plant coverage and frequent irrigation. In contrast, Room B’s temperature remained stable across all test scenarios, confirming its role as an effective control setting. This stability underscores the reliability of the comparative results obtained from Room A and supports the conclusion that smart watering systems can play a crucial role in indoor temperature regulation.