The best months to visit Belarus are September and August. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Belarus: January -3°C / 40mm; February 5°C / 35mm; March 9°C / 40mm; April 15°C / 47mm; May 20°C / 71mm; June 24°C / 80mm; July 26°C / 90mm; August 26°C / 70mm; September 24°C / 55mm; October 12°C / 55mm; November 5°C / 44mm; December 2°C / 40mm.