If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Solan: The hottest months are usually June and May, with an average temperature of 21°C, while the coldest months are January and February, with an average of 8°C. The rainiest months in Solan are July, August, September and June, with each month seeing an average of 399 mm of rainfall.