Parched north-west India, including the national capital, was expected to get rains over the next two days and monsoon would hit Delhi in the next four-five days, Union minister Ashwani Kumar said in New Delhi on Wednesday.
"The conditions are now favourable for the advance of the southwest monsoon," Kumar, minister of state for earth sciences, told reporters.
He said the south-west monsoon had advanced further into parts of Maharashtra, Gujarat and Madhya Pradesh.
Rain and thundershowers were expected over northwest India, including Delhi, Punjab and Haryana, in the next two days and the monsoon would reach the national capital in the next four-five days, Kumar said.
Asked why monsoon predictions were going wrong, Kumar admitted "there was a margin of error" in the forecasts.
Monsoon rains have been 30% deficient so far and the weather office data showed 82% of the area of the country, including the granary states of Punjab and Haryana, had received deficient or scanty rainfall till Wednesday.
The country as a whole has received 137.8 mm rainfall as against the normal of 197.7 mm since the onset of monsoon till date.
The maximum temperature would fall by two to four degrees Celsius over northwest, east and central India in the next three days.