Planning for the weather is a good way to make your trip to San Salvador de Jujuy relaxing and enjoyable, especially when you're splurging. The hottest months are usually January and December, with an average temperature of 18°C, while the coldest months are July and June, with an average of 12°C. The rainiest months in San Salvador de Jujuy are February, December, March and January, with each month seeing an average of 298 mm of rainfall.