The best months to visit Andorra are September and July. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Andorra: January 10°C / 70mm; February 12°C / 53mm; March 11°C / 70mm; April 14°C / 98mm; May 16°C / 106mm; June 22°C / 95mm; July 27°C / 71mm; August 27°C / 70mm; September 18°C / 66mm; October 16°C / 69mm; November 13°C / 80mm; December 9°C / 62mm.