The month of August has been a poor performer as far as rainfall is concerned. Monsoon rains were mostly absent over the national capital and despite August being the rainiest month, there was hardly any rain seen during this time.
Moreover, this month so far, the national capital has recorded 91.9 mm of rain against the normal of 226.8 mm making it over 60% deficient. This means that we might be looking towards the second driest August ever for Delhi.
The driest August was just last year when Delhi only recorded 42.2 mm of rain. As far as the rainiest August is concerned, it goes back to the 60s, wherein in 1961, Delhi recorded a whopping 583.3 mm of rain.
Normally during the month of August, the monsoon trough remains closer to the capital city resulting in good rainfall. In fact, August also is the rainiest month for Delhi. This time, however, the monsoon trough remained mostly north of its normal position, dragged towards the foothills.
Along with this, no Monsoon system was formed in the Bay that could reach Delhi and its adjoining areas. Also, there wasn't any active Western Disturbance which could result in rainfall over Delhi and NCR.
Even in the coming days, i.e. the rest of August, we do not expect rains over Delhi and the NCR region which can improve the figures.