September in Delhi averages a daily high of 34.3°C with nights around 25.1°C. Expect roughly 7.4 wet days totalling 142.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Delhi is November–February.
Based on NEW DELHI SAFDARJUN, IN (8.3km), 1995–2024. 22 years of September data.