Autumn, also known as fall in North American English, is one of the four temperate seasons on Earth. Outside the tropics, autumn marks the transition from summer to winter, in September or March. Autumn is the season when the duration of daylight becomes noticeably shorter and the temperature cools considerably. Day length decreases and night length increases as the season progresses until the winter solstice in December and June. One of its main features in temperate climates is the striking change in colour for the leaves of deciduous trees as they prepare to shed.

ಶರತ್ಕಾಲವು (Autumn) ನಾಲ್ಕು ಸಮಶೀತೋಷ್ಣ ಋತುಗಳ ಪೈಕಿ ಒಂದು. ಶರತ್ಕಾಲವು ಬೇಸಿಗೆಯಿಂದ ಚಳಿಗಾಲಕ್ಕೆ ಆಗುವ ಪರಿವರ್ತನೆಯನ್ನು, ಸಾಮಾನ್ಯವಾಗಿ ಮಾರ್ಚ್ ಕೊನೆಯಲ್ಲಿ ಅಥವಾ ರಾತ್ರಿಯ ಆಗಮನವು ಸ್ಪಷ್ಟವಾಗಿ ಮುಂಚಿತವಾಗಿ ಆಗುವ ಸೆಪ್ಟೆಂಬರ್ ಕೊನೆಯಲ್ಲಿ, ಸೂಚಿಸುತ್ತದೆ.