October to March offer the best conditions for your Delhi trip. Embarking on a Delhi sightseeing excursion during this window will avoid the scorching summer and monsoon seasons. The climate of Delhi results from an overlap between a humid subtropical climate and a semi-arid climate, which produces big swings between summer and winter temperatures. Late November to January brings chilly weather. Pack warm clothes if you plan to visit during this time. May through June averages nearly 90 degree highs and certain days can top out at over 120 degrees Fahrenheit. You might wish to avoid these months.