Weather

Visitors to the Blue Mountains can expect a cool mountain climate year-round, with marked seasonal variability in temperatures, rainfall, and occasional snow falls, especially at higher elevations like Katoomba and Blackheath.​ Monthly Temperatures Summer (Dec–Feb): Maximums often range from 23°C to 28°C in the Upper Mountains, while minimums are about 12°C to 16°C. Lower areas such as Lapstone are warmer, with maximums up to 29°C.​ Autumn (Mar–May): Maximums drop from 17°C to 11°C; minimums from 8°C to 2°C.​ Winter (Jun–Aug): Expect average highs of 11°C and lows dropping to 2°C. Mornings can be frosty, especially in July and August, when temperatures regularly fall below freezing in the highest villages.​ Spring (Sep–Nov): Temperatures slowly rise, with maximums up to 17°C and minimums climbing to 7°C.​ Monthly Rainfall & Snow Rainfall: The region receives moderate to high rainfall, averaging about 1,050 mm per year in the Upper Mountains, with the wettest months being February, March, November, and December (historically up to 150 mm per month).​ Snowfall: Snow is rare but possible in winter (typically July and August), with only about 5 snow days per year at the higher elevations of Katoomba and Blackheath. Heavy snow is uncommon, but light falls can occur, transforming select villages into scenic winter landscapes.​ Rain and fog are frequent in winter and spring, especially in the valleys. Visitors should prepare for cooler, wetter conditions than coastal Sydney, with the possibility of sudden weather changes—ideal for bushwalkers seeking dramatic clouds, mist, and crisp mountain air.