The following are the normal daily temperature ranges for Warsaw.
January 21-32°F (-6 to 0°C); February 21-32°F (-6 to 0°C); March 28-43°F (-2 to 6°C); April 37-54°F (3 to 12°C); May 48-68°F (9-20°C); June 54-73°F (12-23°C); July 59-75°F (15-24°C); August 57-73°F (14-23°C); September 50-66°F (10-19°C); October 41-55°F (5-13°C); November 34-43°F (1-6°C); December 27-36°F (-3 to 2°C).