Abastumani possesses a moderately dry mountainous climate, with relative humidity reaching 50% only in summer. The annual average number of hours of sunlight is 3,000. Average annual precipitation is 626 mm. Average annual temperature is 6.4 to 6.5 °C (44 to 44 °F) in January and 17.2 °C (63 °F) in July. Abastumani's three hyperthermic springs (39-48.5 °C) are little mineralized, rich in sulfate-sodium chloride waters. They have long been used in the treatment of tuberculosis. Abastumani is also a starting point for hikes into the Borjomi-Kharagauli National Park.