Calcutta: Bright sunshine returned to Calcutta on Sunday after nearly 48 hours of cloudy and wet weather.

A depression had kept the sun behind a curtain of clouds and brought more than 100mm of rain to the city over four days.

With the passing of the depression - it is now over Assam and fast dissipating - it is unlikely to rain in the city for the next five days at least and the maximum temperature, which had had a free fall, would slowly climb back.

"The depression that was causing rain in Calcutta and its surrounding areas since Thursday has moved to Assam via Bangladesh. It has weakened and is now lying as a low-pressure area. It will not cause any more rain in and around Calcutta," said Sanjib Bandyopadhyay, deputy director general, India Meteorological Department, Calcutta.

The city received 2.3mm, 7.8mm, 66.2mm and 25.1mm of rainfall between Wednesday and Saturday, the bulk of it on Friday. The total rainfall over the four-day period was 101.4mm.

Two depressions developed over the Bay of Bengal this month, taking the total rainfall so far to 253.9mm, compared to the normal average rainfall of 180.5mm. October at present has experienced 103 per cent surplus rainfall.

With nine days still to go, this is already the second rainiest October in the past decade. Only in 2013, when Cyclone Phailin had struck during Durga Puja, did it rain more during the month. (see chart)

The remaining few days of the month are likely to remain dry unless other weather systems like a low-pressure area or a depression crop up on the Bay, something the weather office says is unlikely.

"The direction of the wind in Calcutta has changed from south westerly to north westerly. This is why we have announced the withdrawal of the monsoon winds from the city. Now, instead of moist of winds from the Bay of Bengal, the city is getting dry winds from the north Indian plains," said Bandyopadhyay.

The city weather is likely to get drier and night temperatures will begin to fall slowly as winter approaches.

The maximum temperature, which had fallen drastically on Friday and Saturday, is likely to return to around 32 degrees Celsius, normal for this time of the year. Cloud cover had caused the maximum temperature to drop to 27.3 degrees Celsius, five notches below normal, on Friday and to 25.8 degrees Celsius, six degrees below normal, on Saturday.

The temperature will go up, but the humidity levels would be low and so the discomfort levels are likely to be in check.