The southwest monsoon has officially withdrawn from the entire state of West Bengal on 13th October, marking the end of the rainy season for 2025. After several weeks of unstable weather, the state has now entered a dry and comfortable phase dominated by northerly winds.
Clear Skies and Drop in Humidity
Since the withdrawal, skies across both North and South Bengal have turned mostly clear with bright sunshine during the day and pleasant air at night. Humidity levels have dropped sharply, making the weather feel noticeably fresher. The pattern of wind flow has completely reversed, with dry northwesterly air replacing the earlier moisture-laden southerlies.
Minimum Temperatures Begin to Fall
The minimum temperatures across the Gangetic plains, including Kolkata, Howrah, and Nadia, have started showing a gradual fall due to the inflow of cool continental air. Early mornings now feel slightly crisp, and a further 1–2°C drop is likely over the next few days as the dry spell continues.
North Bengal Turns Pleasant
In North Bengal, the weather remains stable and dry. The foothill regions such as Jalpaiguri, Cooch Behar, and Alipurduar are likely to experience pleasant mornings and evenings. In the hills of Darjeeling and Kalimpong, the seasonal chill is becoming more evident with night temperatures dipping further.
Light Rain Possible Around Kali Puja
Despite the prevailing dry phase, meteorologists suggest a brief spell of scattered rain may occur around Kali Puja time. A fresh low-pressure system is expected to form over the Bay of Bengal and move towards the south Andhra Pradesh–north Tamil Nadu coast around that period. While it is unlikely to affect Bengal directly, moisture incursion over the Bay could bring isolated light rain or clouding to parts of the coastal and southern districts during the festive weekend. However, these showers are expected to be harmless and short-lived, not affecting celebrations significantly.