Winters in Vanadzor are harsh and cold, with temperatures often dropping below -20°C in January and February. Spring brings a slow warming trend, with temperatures gradually rising above freezing by April. Summer months are warm and sunny, with July and August averaging around 20°C, although occasional heatwaves can push temperatures into the mid-30s. Autumn is mild and pleasant, with temperatures cooling down to around 5°C by November. The coldest period is usually from December to February, while the warmest period is from June to September.