Weather is probably a major factor when you plan your trip to Shahjahanpur, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and June, with an average temperature of 33°C, while the coldest months are January and December, with an average of 18°C. The rainiest months in Shahjahanpur are July, August, September and June, with each month seeing an average of 252 mm of rainfall.