The best months to visit Lithuania are September and May. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Lithuania: January -2°C / 46mm; February 4°C / 41mm; March 8°C / 43mm; April 13°C / 46mm; May 21°C / 67mm; June 23°C / 72mm; July 25°C / 89mm; August 24°C / 82mm; September 22°C / 56mm; October 12°C / 57mm; November 6°C / 45mm; December 3°C / 48mm.