As far as rainfall activity is concerned, Mumbai rains are typically there until the month of September and are mostly absent from October until before the beginning of monsoon. Any other rainfall activity during the winters or the spring season is usually due to a freak weather system that may have formed in the Arabian Sea.
In a similar fashion, city of Mumbai is all set to see some light rains with partly cloudy sky, today, tomorrow and may see some showers day after tomorrow. These rains will be very light and patchy in nature and will not cause any disruption whatsoever.
On the brightside, due to the change in wind pattern and light rains, the rising air quality levels in Mumbai may witness a drop and provide a relief to Mumbaikars who have been dealing with sky high pollution levels.
These rains will occur due to the remnant of Cyclone Mandous likely to move towards Arabian Sea as a Low Pressure Area.