Planning for the weather is an important factor for making your trip to Saptari a success, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 22°C, while the coldest months are January and February, with an average of 2°C. The rainiest months in Saptari are July, August, September and June, with each month seeing an average of 219 mm of rainfall.