The best time to visit Mumbai is from October to February when the weather is pleasant and ideal for exploring and sightseeing. The temperature during this time ranges from 10 to 35 degrees Celcius. Mumbai receives copious rainfall during the monsoon from June to September. The temperature ranges from 20 to 30 degrees Celcius. Monsoon is the ideal time to visit Mumbai for taking a trek on the surrounding hills, because they look their greenest, with amazing waterfalls gushing down. Summer is not a good time to visit Mumbai because it is too hot and humid with temperatures between 25 to 38 degrees Celcius.