Go for Vaishali tour in winter season in months of October to March as the weather is just awesome for sightseeing. Summer arrives in Vaishali in April and continues till June with average temperature between 23°C and 38°C. Humidity level is high and it makes the place avoidable for tourists. Monsoon arrives during the months of July and continues till September with regular rainfall. Winter comes in November and stays up to February. Temperature lasts between 16°C and 25°C and this is the best time to visit Vaishali.