Kathmandu, Bagmati, Nepal Weather Forecast, with current conditions, wind, air quality, and what to expect for the next 3 days. Biratnagar Biratnagar's climate is classified as warm and temperate. The summers here have a good deal of rainfall, while the winters have very little. The climate here is classified as Cwa by the Köppen-Geiger. The temperature in this location is approximately 24.2 °C | 75.6 °F, as determined by statistical analysis. Each year, there is an approximate 1670 mm | 65.7 inch of precipitation that occurs. Get current weather updates and a 14-day forecast for Kathmandu, Nepal, on timeanddate.com. Get the latest weather updates for Nepal. Track temperature, precipitation, humidity, and wind conditions in real-time.