The best time to go to Mohenjo Daro is during the cooler, drier months, specifically from November to March.
During this period, the weather is much more comfortable for exploring the extensive ruins. You can expect pleasant daytime temperatures, typically ranging from 20°C to 28°C, with cooler evenings. This makes it ideal for walking around the archaeological site and taking in the ancient city without the intense heat.
Avoiding the summer months, from April to October, is highly recommended. Temperatures can soar well above 40°C, making outdoor activities very challenging and potentially uncomfortable. The monsoon season, generally from July to September, also brings heavy rainfall, which can make navigating the site difficult and less enjoyable.