Penang is warm and humid all year, but the drier, sunnier months from around December to March are the most comfortable for exploring, and coincide with the colourful Chinese New Year celebrations. The wettest period is usually around September and October, when heavy afternoon downpours are common, though they often pass quickly. There is no cold season, so pack light, breathable clothing and sun protection whenever you visit.
Penang is hot and humid year-round, and long days of walking or climbing to sights like Kek Lok Si can be draining. Carry water, wear light clothing and a hat, use shade during the midday hours, and break up sightseeing with air-conditioned cafes.
Traffic in George Town can be busy and fast, motorbikes weave between cars, and pedestrian crossings are not always respected. Cross carefully and preferably with locals, watch for bikes when stepping off narrow pavements, and take extra care after dark.
Heavy tropical downpours, most common around September and October, can flood streets quickly and make roads slippery. Keep a light rain layer handy, avoid wading through floodwater, and allow extra time for travel when storms hit.