Vrnjci Spa has a moderate continental climate, modified by local conditions. Summers are moderately hot and winters moderately cold. Medium annual temperature is 10.3°C, in winter –0,8°C, in spring 10,5°C, in summer 20°C, in autumn 11,4°C. The highest air temperature in Vrnjci Spa was recorded in 1939; on 22nd July it was 40.5°C. The lowest temperature was recorded in 1929; on 11th February it was –28,5°.
Average relative humidity is 77,7%. The driest month is August, and the wettest is December. In most months the morning humidity is higher than that in the evening, except in May, June, July and December.
Cloudiness is not high in Vrnjci Spa. Average cloudiness is 55%. Difference between the clearest month (August) and the cloudiest one (January) is big, and amounts to 35%. In all the months, except in June, the morning cloudiness is higher than that in the evening. There are about 80 clear days a year, with average cloudiness under 20%. During the greatest part of the year the cloudiness is moderate.
Average annual quantity of atmospheric precipitation in Vrnjci Spa amounts to 779,2mm. Most precipitation falls in June and in October, and least in December and January.
The mountains around Vrnjci Spa protect the town from strong winds. There are some windy days in February, March and April, and much less in other months. There are about 170 days in a year with no wind at all. In summer evenings you can feel just a soft breeze.