The best months to visit Estonia are May and September. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Estonia: January -5°C / 44mm; February 0°C / 36mm; March 6°C / 33mm; April 10°C / 37mm; May 19°C / 42mm; June 22°C / 69mm; July 23°C / 71mm; August 21°C / 78mm; September 20°C / 59mm; October 11°C / 64mm; November 5°C / 52mm; December 2°C / 48mm.