Generally, Bihar has a warm and pleasent climate. Post monsoon is the ideal time to visit this land of monuments, though the state is suitable for visit in any season. The monsoon season usually arrives in June and leaves in September. So, the most suitable climate for tourists is from October to April. The number of tourists visiting the state during these months is at its peak. So, plan and book travel packages to avoid the rush or missing out on desired travel plans.
The trips in Bihar can be planned in any of the four seasons – Winter, Summer, Monsoon and Post Monsoon. As none of the seasons are very extreme the places can be enjoyable if planned discreetly.
Winter (November to Mid-March) is the most pleasant season for planning a trip to Bihar. As it is not very severe winter (4⁰ to 10⁰) and a bright sun keeping the days warm lots of festivals are organised during this season.
Summer (May to Mid-June) is hot in Bihar registering the average temperature of 43⁰. However, the frequent storms and the fresh breeze at the riverbanks at cities as well as in country sides are quite pleasant. The cultivated lands of paddy, corn and wheat fields along with abundant mango groves and rows of coconut trees offering abundant greenery and shades make the summer quite decent.
During the heavy monsoon (July to September) the northern districts should be avoided from the itinerary as the region is prone to occasional floods due to the multiple rivers and nearness to the Himalayan range. The rainfall (over 1400 mm) along the Sub – Himalayan zone falling under the district West Champaran has numerous water bodies along with the rivers Gandak and Kosi and small rivulets. The southern districts are pleasant during monsoon and the rains come in short spells making it enjoyable fresh natural showers.