The best months in Noida are October to March, when the day temperature settles into a comfortable 15–25°C and the haze has not yet built up too badly. November to January are the coolest and the most pleasant for outdoor sightseeing; mornings can be cold and foggy.
Avoid May and June if at all possible: temperatures regularly exceed 42°C and the air is thick with construction dust. The monsoon (July to September) is hot, humid, and the city floods unpredictably. October and November are also the months when Delhi NCR air pollution is at its worst — a serious problem for anyone with respiratory issues — coinciding with crop-burning season in neighbouring Punjab and Haryana. February and March are the best month to visit overall.