November – February: The best time to visit Chitwan National Park is between the months of November and February, with pleasant temperatures and virtually non-existent rainfall. The start of November signifies the beginning of the cooler months in the southern plains of Nepal, with daytime temperatures of roughly 25°C. Newly created watering holes provide an excellent opportunity to see a high concentration of wildlife including migrating birds in the month of November. Temperatures steadily from November until the coolest month of January, when daytime temperatures average at around 18°C. These cooler temperatures are ideal for walking in the park, and they also encourage animals to wander in the daytime rather than shading from the summer sun. The optimum time for spotting wildlife in Chitwan is from late-January, when the locals cut the tall elephant grass and it becomes much easier to spot animals from distance.
March-May: Temperatures rise rapidly in Southern Nepal throughout these months with averages soaring to 35°C in May. The months of March and April in Chitwan usually remain dry, but southern Nepal’s rainy season arrives in May when the land gets the first proper rainfall after the dry winter months. The number of rainy days jumps from 7 in April to 19 days in May. Much like in the rest of Nepal, the approaching monsoon causes humidity levels to rise resulting in a 65% Humidity level in May. Although this period is not the perfect time to visit Chitwan National Park, it is not without its benefits. The numbers of tourists fall dramatically as the heat increases, which results in less noise and perhaps a better chance of seeing wildlife.
June-August: Much like in the rest of Nepal the summer months bring with them a huge amount of rain as the monsoon arrives in Nepal with rainfall peaking in July at an average of 650mm. Although Chitwan National Park remains open throughout the monsoon, certain activities may be limited due to heavy rain. Throughout July and August rainfall is expected on a daily basis, and heat and humidity in Southern Nepal are high. We would advise against travelling to Chitwan National Park during the monsoon.
September & October: The start of September sees a large amount of rainfall in southern Nepal especially if there is a late Monsoon on that particular year. More often than not the second half of the month sees clearer skies which can provide excellent conditions for visiting Chitwan. Throughout these two months average temperatures remain in the high twenties although there is a chance of a few cooler days in October with night time temperatures dropping as low as 10°C on occasion. If you are looking for warm weather, and dont mind an occassional shower, these months are great times to visit Chitwan. The monsoon rains bring with them an abundance of life in the park and these two months allow you to make the most of this without the crowds that arrive during peak season.