The best season for Patna vacation is from month of October to March. Patna enjoys hot summer with 100% humidity. Summer lasts in Patna between April and June and temperature remains between 24°C and 40°C. So, tourists are suggested to avoid the season. Monsoon starts in Patna during the months of July and lasts till September with regular and heavy rainfall. Winter arrives here in November and continues till February with temperature hovering between 17°C and 25°C. This is the best time to visit Patna.