Warsaw's climate is humid continental (Koppen Dfb) with relatively cool winters and mild summers. The average temperature is -3 °C (27 °F) in January and 19.3 °C (66.7 °F) in July. Temperatures may often reach 30 °C (86 °F) in the summer. Yearly rainfall averages 495 millimeters (19.5 in), the most rainy month being July. Spring and Autumn (Fall) are usually beautiful seasons, the former crisp and sunny and full of blooms and the latter alternately sunny and misty, and cool but not cold.